W. G. Skene's research while affiliated with Université de Montréal and other places
What is this page?
This page lists the scientific contributions of an author, who either does not have a ResearchGate profile, or has not yet added these contributions to their profile.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
Publications (150)
In this review, recent advances that exploit the intrinsic emission of organic materials for reversibly modulating their intensity with applied potential are surveyed. Key design strategies that have been adopted during the past five years for developing such electrofluorochromic materials are presented, focusing on molecular fluorophores that are...
The incorporation of heteroatoms into polycyclic aromatic hydrocarbons can alter their optical and electronic properties. Here we report the synthesis and characterization of a series of N,N’-diaryl diazadioxatetrahydropentacenes (4a-e) as well as and related N-phenyl azatrioxatetrahydropentacene and triazatetrahydrotetracene derivatives compounds...
Electrospun conductive nanofibers were obtained from a blend of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) (PEG-PPG-PEG). The effect of the treatment with sulfuric acid (H2SO4) on the electromechanical performances of the fibers was investigated. Fibril...
Stretchable electrochromic devices were fabricated from electrospun PEDOT:PSS (poly(3,4-ethylenedioxythiophene):polystyrene sulfonate) fibers. Stretchable and transparent electrodes with a sheet resistance of 1200 Ω/sq were prepared by depositing the conductive fibers on elastomeric substrates that were prepared from polydimethylsiloxane. The condu...
A series of electroactive materials consisting of an aromatic core that was conjugated with two alkynes and flanked with two triphenyl amines was investigated as electrochromes and electrofluorochromes.
Stretchable conductors and organic electrochemical transistors (OECT) were fabricated from PEDOT:Tos (poly (3,4-ethylenedioxythiophene):iron tosylate) nanofibers. The devices were prepared by a combination of electrospinning and electrode printing followed by vapor phase polymerization (VPP). The impact of both the processing time and the compositi...
The thermal polymerization of a bis(triphenylamine)-bis(styrene) monomer on ITO coated glass gave an electroactive film that underwent two stepwise oxidations. The perceived color change of the film upon stepwise oxidation was colorless-to-yellow followed by yellow-to-blue. The anodic cyclic voltammogram of the monomer was consistent over multiple...
A series of electronic push-pull, pull-pull, and push fluorophores has been prepared from a benzoselenadiazole core so that their spectroscopic, electrochemical, spectro-electrochemical, and spectro-electrofluorescence properties could be examined. The emission wavelengths and fluorescence quantum yields (Φfl ) of the N,N-dimethyl fluorophores were...
To reduce cost and improve environmental sustainability, there continues to be an important need for the development of efficient organic light‐emitting diodes (OLEDs) that do not rely on heavy metal‐containing compounds. In particular, the efficiency of fluorescent near‐infrared (NIR) OLEDs continues to lag well‐behind that of their platinum‐conta...
A conjugated azomethine consisting of three thiophenes, two azomethine bonds, and end-terminated with phenyl-ureas was prepared by a convergent approach. Single crystal X-ray crystallography confirmed intermolecular hydrogen bonding with one of the terminal ureas to form a supramolecular dimer. Hydrogen bonding was also confirmed by FT-IR, which wa...
Intensive efforts are currently dedicated towards developing devices that can convert and store renewable energy derived from renewable sources. These are to address the current global energy consumption needs and reduce the carbon footprint that is associated with the use of primary non-renewable energy resources. Indeed, many of these approaches...
The Gewald reaction was used to make a 2,5-diaminothiphonene that was functionalized with two styrene monomers. It was condensed with 2,5-thiophene dicarboxaldehyde to afford a conjugated azomethine triad. The X-ray crystallographic structure of the red colored azomethine confirmed the anti-parallel arrangement and the near coplanarity of the three...
A synthetic approach for preparing a variety of heterocyclic tetrahydropentacene derivatives via nucleophilic aromatic substitution reactions of bidentate nucleophiles and tetrafluoroterephthalonitrile was developed. X-ray crystallography of several products revealed that the compounds containing oxygen and nitrogen heteroatoms are highly planar an...
Through various triplet‐harvesting approaches, fluorescent organic light‐emitting diodes (OLEDs) that emit in the visible spectrum can now be fabricated with efficiencies rivaling those of their phosphorescent counterparts. However, achieving high efficiencies in the near‐infrared (NIR) is considerably more challenging. This is in part due to the l...
An electroactive small molecule consisting of three triphenylamines and two azomethines was prepared with a pendant oxetane moiety. The electroactive molecule was immobilized on transparent electrodes by photochemically mediated acid catalyzed ring-opening polymerization of the oxetane. Positive and negative patterns of polymer films could also be...
In the title compound, C 31 H 31 N 3 O 5 S, the regioselective substitution of the thiophene is confirmed with the amine and the amide at the 2- and 5-positions, respectively. In the molecule, the thiophene ring is twisted by 12.82 (3)° with respect to the aromatic ring of the benzamido group. Intramolecular N—H...O hydrogen bonds are present invol...
With the aim of achieving reversible oxidation and color tuning, the effect of the central aromatic on the spectroscopic, electrochemical, and spectrochemical properties of a series of electrochromic azomethine triads was investigated. The absorption of the alkylated thiophene derivatives was blue-shifted relative to their unalkylated counterparts...
A series of linear benzofuran derivatives consisting of either a vinylene or a cyanovinylene were prepared in order to investigate their emission properties. The X-ray crystallography of structurally similar derivatives was also evaluated. The crystalline structures of the vinylene derivatives showed only lateral contacts that involved the benzofur...
A series of novel tetrakis(dialkoxyphenyl) dicyanotetraoxapentacene derivatives (1a‐c) were prepared by reaction of the appropriate terphenyl diols with tetrafluoroterephthalonitrile in good yields. Compounds 1b and 1c, which bear hexyloxy and decyloxy side chains, exhibit columnar hexagonal mesophases, as shown by polarized optical microscopy, var...
Diazonium chemistry concomitant with in situ electrochemical reduction was used to graft an aryl aldehyde to indium-tin oxide (ITO) coated glass substrates. This served as an anchor for preparing electroactive azomethines that were covalently bonded to the transparent electrode. The immobilized azomethines could undergo multiple step-wise component...
A monomer (1) consisting of a benzothiadiazole core flanked by two triphenylamines and two styrene pendant moieties was prepared. The monomer was fluorescent with its emission spanning 145 nm in the visible, contingent on the organic solvent used for the measurement. In addition to its positive solvatochromism, the absolute fluorescence quantum yie...
A series of conjugated azomethine triads were prepared from a 2-amino-3-nitrilethiophene derivative (5) and four different aromatic dialdehydes. The conjugated azomethines were targeted to investigate the effect of the different aromatics on the spectroscopic, electrochemical, and spectroelectrochemical properties. It was found that the triads coul...
An unsymmetric bis(perfluorostyryl)furan with a cyanovinyl unit was prepared (F1). Its crystallographic structure was resolved along with its cyano vinylene (1) and unsubstituted (2) aldehyde precursors. F1 was found to form ribbons involving C-H⋯F interactions, while also having multiple intermolecular contacts, including C-F⋯Fπ and π-π interactio...
An electronic push-pull fluorophore consisting of an intrinsically fluorescent central fluorene capped with two diaminophenyl groups was prepared. An aminothiophene was conjugated to the two flanking diphenylamines through a fluorescent quenching azomethine bond. X-ray crystallographic analysis confirmed that the fluorophore formed multiple intermo...
A series of thiophenoazomethines connected to a central triphenylamine were prepared. The effect of the type of aminothiophene used to prepare the conjugated azomethines and the number of azomethine bonds, ranging from one to three, flanking the triphenylamine on the spectral, electrochemical, and spectroelectrochemical properties were investigated...
Two electronic push–pull fluorophores consisting of a benzothiadiazole core and a terminal N,N-dimethylamino electron donating group were prepared. The effect of the terminal electron withdrawing group (–NO 2 and –CN) on the spectroscopic, electrochemical, and spectroelectrochemical properties were examined. The fluorophores were solvatochromic wit...
A series of 2,5-distyrylfuran derivatives bearing pentafluorophenyl- and cyanovinyl units have been synthesized for aggregation-induced emission (AIE). The effect of the type and extent of the supramolecular connections on the AIE of the furan derivatives were examined and correlated with their X-ray crystal structures. It was found that the simult...
The absolute fluorescence quantum yields (fl) of a polyfluorenyl azomethine homopolymer were measured as a function of solvent polarity. The solvent induced and temperature dependent fluorescence of the homopolymer were also investigated and compared to its corresponding monomer and copolymer. The fl of the homopolymer was consistent (49-70%), re...
A series of polyazomethines prepared from complementary triphenylamine diamines and thiophene dialdehydes by both solution step-growth and on-substrate polymerizations were examined. The absorbance, electrochemical, and spectroelectrochemical properties of the solution processable polyazomethines were compared to their on-substrate prepared counter...
Solution-processable polyazomethines containing thiophenes were synthesized and used as the donor material in bulk heterojunction solar cells. The blue polymers exhibited similar electrochemical properties as the benchmark P3HT with the advantage of absorbing more of the visible spectrum. The resulting photovoltaic devices using polyazomethines in...
Conjugated C3 symmetric molecules have been pursued for their fluorescent and electrochemical properties. The synthesis of conjugated C3 symmetric aryl tripyrroles has been performed by a route featuring three steps from trimethyl 1,3,5-benzene tricarboxylate 6: copper-catalyzed cascade addition of vinylmagnesium bromide to convert the carboxylates...
We report the first successful preparation of polyelectrolyte brushes using an ATRP initiator that was covalently grafted to silica and mica substrates via an organophosphonic acid. Covalent attachment of the initiator to silica and mica and the subsequent synthesis of polyacrylic acid (PAA) and poly(sulfopropyl methacrylic acid) brushes by water m...
A series of conjugated polyazomethines were prepared using an on-substrate method for their direct immobilization on transparent electrodes. The electrochemical properties of the polymers were assessed for determining the ideal monomers and optimal polymer thickness required for reversible electrochemical oxidation. The condensation of complementar...
Conjugated thiophenoazomethine triads containing an acid sensitive oxetane group were prepared. The solution processable monomers were immobilized on glass and ITO coated glass substrates by photoinduced cationic ring opening polymerization (CROP) of the oxetane moiety. Photolithography using a photoacid generator and photosensitizer were used to p...
A series of conjugated azomethines end-capped with phenylamides and consisting of different aromatic cores of varying [small pi]-donor strength were prepared. Their optical and electrochemical properties were investigated to assess the suitability of the azomethines as electrochromic materials. The azomethines were found to undergo both electrochem...
We report the preparation, characterization and responsive behavior of polystyrene-block-poly(acrylic acid) (PS-b-PAA) copolymer brushes grafted from silica substrates using Surface-Initiated Atom Transfer Radical Polymerization (SI-ATRP). pH-dependent swelling behavior was investigated in situ by ellipsometry and it confirmed that PAA chains can b...
Thermal polymerization of electroactive thin films using an aminobisthiophene vinylene monomer was done directly on electrodes. The resulting films reversibly switched colors in the visible-to-NIR regions, contingent on the monomers used for polymerization. Working transmissive electrochromic devices were fabricated using the electrode immobilized...
A series of symmetric and unsymmetric conjugated azomethines derived from cinnamaldehyde and 2,5-diamiothiophene were prepared. The optical, electrochemical, and spectroelectrochemical properties of the electronic push-pull and push-push triads were investigated. Their properties could be tuned contingent on the cinnamaldehyde's electron withdrawin...
The title compound, C
16
H
12
N
4
S, forms a three-dimensional layered network structure
via
intermolecular hydrogen bonding and π-stacking. The azomethine molecule adopts the thermodynamically stable
E
regioisomer and the pyridine substituents are antiperiplanar. The mean planes of the pyridine rings and the azomethine group to which they are conn...
Conjugated thiophene azomethines with different degrees of polymerization were prepared. Both the molecular weights and polydispersity indices were consistent with step-growth polymerization instead of expected dynamic component exchange by transimination. It was found that the absorbance of the neutral compounds could be tuned between 450 and 630...
An electrochromic polymer is obtained through a solid state on-substrate constitutional component exchange from a non-electroactive polymer. An additional sequential exchange can be utilized to pattern the polymer film demonstrating the versatility of this exchange process for postpolymerization property tuning, including functional material prepar...
A series of azomethine and vinylene dyad and triad analogues were prepared. Their absorbance, fluorescence, and redox properties were examined experimentally and theoretically using DFT calculations. These measurements were done to determine the effect of the heteroatom of the azomethine relative to its all-carbon counterpart and to assess the isoe...
An electroactive polyazomethine is prepared from a solution processable 2,5-diaminothiophene derivative and 4,4′-triphenylamine dialdehyde by spray-coating the monomers on substrates, including indium tin oxide (ITO) coated glass and native glass slides. The conjugated polymer was rapidly formed in situ by heating the substrates at 120 °C for 30 mi...
A series of fluorene azomethines were prepared to examine the effect of structural modification on the absolute fluorescence quantum yields (Φfl). The change in fluorescence occurring upon reversing the orientation of the azomethine bond, the number of fluorene units, and alkylation at the 9,9′-positions of fluorene was examined. It was found that...
In solution, 4,4'-bis(2-benzoxazolyl)stilbene (BBS) was found to exhibit consistently high absolute fluorescence quantum yields (Φfl ≥ 0.88) and a monoexponential lifetime, both independent of BBS concentration. The BBS steady-state and time-resolved photophysics were investigated by different techniques, in order to understand the various deactiva...
A novel fluorescent monomer consisting of complementary amino and aldehyde functional groups was prepared via the Buchwald–Hartwig coupling protocol. The monomer self-condensed to yield a π-conjugated regioregular polyazomethine that fluoresced in 48% in solution. The value measured by absolute methods is the highest reported fluorescence quantum y...
In the title compound, CHNS, the thio-phene and pyridine rings are coplanar, forming a dihedral angle of 3.89 (7)°. The conformation about the C=N bond [1.2795 (18) Å] is . In the crystal, translationally related mol-ecules along the axis form weak π-π inter-actions [centroid-centroid distance = 3.8451 (8) Å] between the thio-phene rings.
In this work, we explored the capacity of π-Conjugated Thiopheno-Azomethines in the form of thin films for use in organic electronic applications. The charge-carrier transport properties of the π-Conjugated Thiopheno-Azomethines were obtained in field-effect transistor configuration after the characterization of the film forming properties by fluor...
A series of oligofluorenes ranging between one and three repeating units were prepared as structurally well-defined representative models of polyfluorenes. The photophysics of the oligofluorene models were investigated both by laser flash photolysis and steady-state fluorescence. The effects of the ketone and ketylimine functional groups in the 9-p...
Fluorescent α,α'-diamide substituted bi- and terthiophene derivatives were prepared by Stille and Suzuki couplings. Their one-pot deprotection and coupling with 2-thiophene carboxaldehyde led to stable conjugated azomethines. These exhibited electrochromic properties, and they were used to fabricate a working electrochromic device.
The solvatochromic and electrochemical properties of electronic push-pull 2-aminobithiophenes consisting of an aldehyde and nitro withdrawing groups were examined. With the use of an integrating sphere, the absolute quantum yields of the bithiophenes were measured. They were found to be highly fluorescent (Φ(fl) > 70%), provided the nitro group was...
A series of de novo symmetric heterocyclic azomethine dyads and triads consisting uniquely of furans, thiophenes, pyrroles and methyl‐pyrroles were prepared. These were prepared to investigate the effect of various heterocycles and the degree of conjugation on the spectroscopic and electrochemical properties. The crystallographic structures of the...
A series of EDOT (3,4-ethylenedioxythiophene) containing azomethines were prepared for investigating their opto-electronic properties. These properties were compared to those of their thiophene azomethine counterparts and it was found that incorporating the EDOT moiety resulted in a 30 nm bathochromic shift in the absorbance. Meanwhile, the oxidati...
The color transitions between the neutral and doped states of a series of heterocyclic azomethines were investigated in both thin films immobilized on glass substrates and in solution. Their doping and subsequent dedoping of the intermediate could easily be followed spectroscopically owing to their strong visible absorbance. With all the azomethine...
A series of new conjugated copolyazomethines consisting of alternating fluorene and thiophenes were prepared. Different thiophenes were incorporated for examining their effect on the polymer’s opto-electronic properties. Blue, red, and green emissions were possible contingent on the thiophene comonomer and the placement of the azomethine nitrogen....
This account gives an overview of our recent work in the area of conjugated azomethines derived from 2-aminothiophenes. It will be presented that mild reaction conditions can be used to selectively prepare symmetric and unsymmetric conjugated azomethines. It further will be demonstrated that azomethines consisting of various 5-membered aryl heteroc...
A series of water-soluble 1-amino-naphthalenes and 2-amino-fluorenes are prepared. These serve as model fluorophores for measuring the thermodynamics and kinetics of fluorescence quenching with phenylboronic acids and aliphatic amines. Steady-state and time-resolved fluorescence quenching kinetics are investigated using the Stern–Volmer method. Dif...
The unique 3,4-ethylenedioxythiophene (EDOT) unit of the title compound, C(24)H(22)N(2)O(8)S(3 center dot)C(3)H(6)O, is twisted by 1.9 (3)degrees relative to the central thiophene ring. The three heterocyclic units are antiperiplanar. In the crystal, inversion dimers linked by pairs of C-H center dot center dot center dot O hydrogen bonds connect t...
Poly(acrylic acid) (PAA) covalently immobilized on glass substrates was made fluorescent by grafting a BODIPY derivative (PMOH) via an ester linkage. Although only nanograms/square centimeter of polymer are understood to be immobilized onto the SiO2 substrate, the fluorophore-tagged polymer was readily visible to the naked eye and its fluorescence...
In the search of functional materials with improved electrochromic properties, thiophenes and asymmetric bipyrroles have been conjugated with azomethine units. 4-Methoxy-2,2'-bipyrroles 3-6 were first synthesized by a general route from 4-hydroxyproline and converted subsequently to dialdehydes 8-15, which underwent condensations with different ami...
The photophysics of 2,5-bis(5-tert-butyl-benzoxazol-2-yl)thiophene (BBT) were investigated for assessing its limitations for use as a universal fluorophore and as a viable sensor for both polymeric and solution studies. This is of importance given the limitations of currently used materials. BBT's steady-state and time-resolved fluorescence were ad...
In the crystal structure of the title compound, C(20)H(20)N(4)O(4)S, the azomethine group adopt E conformations. The pyrrole units are twisted by 10.31 (4) and 18.90 (5)° with respect to the central thio-phene ring. The three-dimensional network is close packed and involves N-H⋯O, N-H⋯N, C-H⋯N and C-H⋯O hydrogen bonding.
Electrochemical studies of a highly conjugated all-thiophene polyazomethine (1) revealed that it could be pseudo-reversibly oxidized. Electrochemical and chemical oxidation of 1 generated the same intermediate that absorbed at 820nm and was bathochromically shifted by 135nm from the neutral polymer. This intermediate was transparent in the visible...
A prefluorescent conjugated azomethine (4) was prepared by condensing 8-hydroxyquinoline-5-carbaldehyde with 2-amine thiophene. The fluorescence of the azomethine was quenched in organic solvents including dichloromethane, methanol, DMSO, and DMF. However, the fluorescence of 4 was selectively revived in the presence of zinc and an absolute quantum...
Dynamic polymers have received much attention owing in part to their properties that can be tailored postpolymerization. Although dynamic polymers are able to undergo constitutional component shuffling, they can be consistently depolymerised and repolymerized owing to their reversible covalent bonds. We will present dynamic polymers capable of chan...
Fluorescent sensors for the real-time analytical detection place an important role in a broad range of area including environmental monitoring, medicinal diagnostics and biogen detection. Due to the high affinity of boronic acids with sugars and the high affinity of catechol with anions, we developed new multi-tasking fluorophores containing both s...
A conjugated all-fluorene polyazomethine (6) was prepared from the condensation of 9,9′-dioctyl fluorene dialdehyde and 9,9′-dihexyl fluorene diamine. The resulting polymer was soluble in common organic solvents courtesy of the solubilizing alkyl groups in the 9,9′ positions. Determination of the polymer's molecular weight was subsequently possible...
Stable 2-aminobithiophenes were prepared using the Gewald reaction. The resulting push-pull bithiophenes exhibited both unprecedented high fluorescence yields and stability in addition to demonstrating fluorescence on-off properties.
The spectroscopic and electrochemical properties of a 9-substituted fluorene ketylimine (3) were investigated and compared with those of its vinylene analogue (4) to determine the origins of the quenched fluorescence of these compounds. The predominate mode of singlet excited state deactivation of the heteroatomic fluorene was found to be internal...
A highly conjugated polyazomethine (3) consisting uniquely of thiophenes was investigated for sustaining postpolymerization property tuning. This was courtesy of the ever-present and reactive amino and aldehyde chain ends. Subjecting the polymer to polymerization conditions in the absence of monomers resulted in a DPn increase from 15 to 70. The al...
The structure of the title compound, C16H19N3O4S, shows the planes described by the thiophene and the pyrroles are twisted by 17.06 (4)degrees. Additionally, the structure shows the azomethine bond adopts the E configuration, while the pyrrole is disordered as a heterocycle flip [occupancy ratio 0.729 (5):0.271 (5)]. The three-dimensional network i...
A conjugated polymer (P1) containing a pendant aldehyde was anodically prepared on ITO electrodes. Aminothiophenes could be captured by reacting with an aldehyde group located along the polymer backbone resulting in a robust azomethine bond. This was confirmed both spectroscopically and electrochromically. P1 undergoes absorbance and fluorescence b...
In the crystal structure of the title compound, C(15)H(16)N(2)O(5)S, the azomethine adopts the E configuration. The two heterocyclic rings adopt an anti-periplanar orientation. The mean planes of the thio-phene and furan rings are twisted by 2.51 (4)°. The crystal structure exhibits inter-molecular N-H⋯O hydrogen bonding. π-π stacking is also obser...
Poly(acrylic acid) (PAA) and poly(tert-butyl acrylate) (PBA) brushes of various grafting densities were prepared via surface-initiated polymerization of tert-butyl acrylate on mica. PAA was prepared by hydrolyzing the PBA brushes. The swelling behavior of PBA and PAA brushes was studied as a function of grafting density by AFM. The swelling of the...
Unprecedented direct polymerization of sodium acrylate (NaA) on mica and silica substrates was undertaken using standard ATRP polymerization conditions at room temperature. The resulting thickness of the poly(sodium acrylate) (PNaA) grafted layer was determined using ellipsometry and AFM.
A series of fluorenylazomethine dyads and triads were prepared by simple condensation between the corresponding amine and aldehyde fluorene derivatives. These compounds were prepared as model compounds for investigating the effects of substitution and electronic groups on both the electrochemical properties and fluorescence quantum yields. It was f...
A series of oligofluorenes containing arylketylimines in the 9-position ranging between 1 and 3 fluorene segments was prepared. The conjugated ketylimines were prepared using dehydration and Lewis acid protocols from the corresponding oligofluorenones. These heteroconjugated oligomers were prepared for examining the effect of the ketylimine moiety...
The spectroelectrochemical behaviour of heterocyclic azomethines prepared by condensing complementary aldehydes and amines was observed as intense colour changes of the oxidized products relative to the neutral form. The tuneable colours and reversible oxidation were contingent on the heterocycles. The Royal Society of Chemistry 2010.
An azomethine derived from EDOT segments was easily prepared and exhibited reversible oxidation. The spectroelectrochemical behaviour of this EDOT containing azomethine was observed as intense colour changes for the oxidized products relative to the neutral form. Multiple reversible colours states were observed with the anodically and hydrolyticall...
Poly(acrylic acid) (PAA) brushes covalently linked to mica were prepared using the graft from approach in a two-step process: (i) poly(tert-butyl acrylate) (PtBA) brushes were first synthesized by atom transfer radical polymerization directly from an activated mica substrate (ii) followed by hydrolysis to generate PAA brushes. The hydrolysis reacti...
A series of new π-conjugated donor (D) and acceptor (A) dyad comonomers were prepared using Suzuki coupling protocols. The D–A comonomers consisting of thiophene/bithiophene as donors and pyridine/pyrimidine as acceptors were prepared to investigate their photophysical and electrochemical properties. The dyads were spectroscopically confirmed to be...
Alkylated derivatives of 2, 4, 6-aniline and 3-thiophene carbaldehydes were used for preparing aldol and ketal imines (1−9). The effect of substitution on the photophysical properties of alkylated azomethines was examined in order to understand the origins of complete fluorescence suppression exhibited by all azomethines. Introducing steric element...