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January 2012 - present
January 1996 - December 2012
January 2006 - December 2008
Publications
Publications (411)
In this study, the preparation of robust and transparent poly(butenyl sorbate) (PBS) membranes (PBS-R) was studied in terms of their CO2/CH4 separation performance. The organocatalytic group transfer polymerization of butenyl sorbate was used for the synthesis of PBS with a designed molecular weight and a moderate molecular weight distribution. For...
The group-transfer polymerization (GTP) of N,N-bis(2-methoxyethyl)acrylamide (MOEAm) initiated by Me2EtSiH in the hydrosilylation-promoted method and by silylketene acetal (SKA) in the conventional method proceeded in a controlled/living manner to provide poly(N,N-bis(2-methoxyethyl)acrylamide) (PMOEAm) and PMOEAm with the SKA residue at the α-chai...
Aqueous solutions of conventional temperature-responsive amphiphilic polymers undergo a coil–globule conformational transition around the lower critical solution temperature (LCST) that causes the polymer surfaces to become hydrophobic and the polymers to aggregate together. Isocyanate polymers with alkylated oligo(ethylene oxide) side chains are e...
Recently, experimental investigations of a class of temperature-responsive polymers tethered to oligooxyethylene side chains terminated with alkyl groups have been conducted. In this study, aqueous solutions of poly(glycidyl ether)s (PGE) with varying numbers of oxyethylene units, poly(methyl(oligooxyethylene)n glycidyl ether) (poly(Me(EO)nGE)), an...
Poly(N,N-bis(2-ethoxyethyl)acrylamide) (PEOEAm), a new thermoresponsive polyacrylamide, has been studied from the perspectives of synthesis and thermal phase transition. PEOEAm was synthesized via the hydrosilylation-promoted group transfer polymerization (GTP) without any...
Late transition metals have long served as workhorses for vinyl polymerization of norbornene derivatives. Nevertheless, for such catalytic systems, insoluble polynorbornene (PNB) products are often produced which hampers their further detailed characterizations, such as molecular weights, polydispersities, stereoregularities, etc. In this work, we...
A series of thermo- and light-responsive copolymers of poly (N-isopropylacrylamide) (PNIPAM) and 6-[4-(4-methoxy phenyl azo)-phenoxyl-hexyl methacrylate) (AzoMA) (PNIPAM-b-PAzoMA) were synthesized via reversible addition–fragmentation chain transfer (RAFT) radical polymerization. The resulting copolymers had a narrow molecular weight distribution r...
Addressing the traditional poor thermostability issues of late-transition metal is highly important for both polyolefin and polydienes industries. In this contribution, a series of α-imino-ketone and α-diimine cobalt complexes bearing intra-ligand H···F noncovalent interactions were synthesized and thoroughly characterized. From single-crystal anal...
This contribution reports the syntheses, structural analyses and properties of europium (Eu3+)- and terbium (Tb3+)-based coordination complexes of poly(N-isopropyl,N-methylacrylamide-stat-N,N-dimethylacrylamide) (poly(iPMAm-stat-DMAm)) copolymer, named as poly-Eu(III) and poly-Tb(III), respectively. In greater detail, poly(iPMAm85-stat-DMAm15) is f...
We describe the progress in precision polymerizations of specific kinds of N-alkylacrylamides and N,N-dialkylacrylamides to produce polymers showing thermoresponsive properties in aqueous media, which representatively include the reversible-deactivation radical polymerizations (RDRPs) of N-isopropylacrylamide (PNIPAM) and N,N-diethylacrylamide (DEA...
In this paper, we describe a comprehensive study of the thermoresponsive properties of statistic copolymers and multiblock copolymers synthesized by poly(glycidol)s (PG) and poly(ethyl glycidyl ether) (PEGE) with different copolymerization methods. These copolymers were first synthesized by ring-opening polymerization (ROP), which was initiated by...
A π-conjugated urea-bearing phenyleneethynylene polymer (Poly-2) was rationally designed by the Sonogashira coupling condensation reaction and had been demonstrated to have a unique fluorescent quenching effect for optical detection of all determined anions, especially for selectively probing cyanide anion (CN⁻). The fluorescent emission of Poly-2...
Glycoconjugated chlorins represent a promising class of compounds that meet the requirements for the third-generation photosensitizer (PS) for photodynamic therapy (PDT). We have focused on the use of glucose (Glc) to improve the performance of the PS based on the Warburg effect—a phenomenon where tumors consume higher Glc levels than normal cells....
The controlled syntheses of glycerol-based polymers that consist of poly(glycidol) (PG)-backbones and thermoresponsive oligo(oxyethylene)-side chains are described. The organocatalytic ring-opening polymerizations of benzyl glycidyl ether (BnGE) were performed to produce...
A synthetic method for a series of poly(glycidol) (PG)-based amphiphilic block copolymers is presented with an emphasis on the catalyst switch method from an organic superbase ( t -Bu-P 4 ) to another with...
Stimuli-responsive luminescent hybrid nanoparticles consisting of a magnetite Fe3O4 core and a hydrophilic outer shell were synthesized. The shell was a thermo-responsive Eu(III) complex shell, which was synthesized as follows: first, 3-Methacryloxypropyl-trimethoxysilane (MEMO)-co-poly(N-isopropylacrylamide) (NIPAM) (MEMO-co-PNIPAM) copolymer was...
N-methyl-N-n-propylacrylamide (MnPAm) was polymerized using a versatile organocatalytic group transfer polymerization (GTP) system to afford the well-defined poly(N-methyl-N-n-propylacrylamide) (PMnPAm), in which a silyl ketene aminal was in-situ formed as the initiator by the B(C6F5)3-catalyzed 1,4-hydrosilylation of MnPAm and the stable hydrosila...
The core-first synthesis of four-armed star-shaped poly( N,N- diethylacrylamide) with predicted molecular weights and narrow molecular weight distributions ( Mw/Mn= 1.17) was carried out by the Tris(pentafluorophenyl)borane (B(C 6 F 5 ) 3 ) -catalyzed group transfer polymerization (GTP) using ethyldimethylsilane (EtMe 2 SiH) as hydrosilylane. The o...
Poly(N-isopropyl,N-methylacrylamide) (PiPMAm) was synthesized as the new family of thermoresponsive polyacrylamides using the B(C6F5)3-catalyzed group transfer polymerization (GTP) of N-isopropyl,N-methylacrylamide (iPMAm) with 1-methoxy-1-(triethylsiloxy)-2-methyl-1-propene (SKAEt) as the initiator. The B(C6F5)3-catalyzed group transfer copolymeri...
Thermo-, pH- and glucose-responsive polymeric nanoparticles are of great interest in developing a self-regulated drug delivery system. The novel core-shell nanoparticles were synthesized by self-assembly of a phenylboronic acid-based block copolymer poly- (N-isopropylacrylamide)-block-poly(3-acrylamidophenylboronic acid) (PNIPAM136-b-PAPBA16) and a...
We demonstrated the B(C6F5)3-catalyzed group transfer polymerization (GTP) of acrylate monomers with hydrosilane by the in situ formation of silyl ketene acetals (SKAs) as the initiator by the B(C6F5)3-catalyzed 1,4-hydrosilylation of acrylate monomers and hydrosilane. In addition, this new GTP method was clarified in terms of the polymerization me...
A series of brush block copolymers (BBCPs) consisting of poly(decyl glycidyl ether) (PDGE) and poly(10-hydroxyldecyl glycidyl ether) (PHDGE) blocks, having four different types of chain tacticities, i.e., [at-PDGE]-b-[at-PDEGE], [at-PDGE]-b-[it-PDEGE], [it-PDGE]-b-[at-PDEGE], and [it-PDGE]-b-[it-PDEGE], where the it and at represent the isotactic a...
This study reports the first well-defined and stable nanomicelles (20−30 nm in diameter) self-assembled from amphiphilic brush (comb-like) cyclic and tadpole-shaped copolymers composed of hydrophobic n-decyl and hydrophilic 2-(2-methoxyethoxy)ethoxy)ethyl bristle blocks based on a poly(glycidyl ether) backbone. The micelle formation behaviour and s...
A series of novel fluorescent complexes was formed by chelation of the thermosensitive polymers with europium(III) ions. The polymers was synthesized via atom transfer radical polymerization (ATRP), which composed of poly(N-isopropyl acrylamide) (PNIPAM) and 2-amino-2-deoxy-d-glucopyranose(d-glucosamine, GA). The aqueous solutions of the polymers a...
This paper describes the comprehensive study of the lower critical solution temperature (LCST)-type thermoresponsive properties of various poly(glycidyl ether) homopolymers, varying in their side chain structure, molecular weight, and main chain tacticity, as well as their copolymers, varying in the monomer composition and monomer sequence. For the...
A novel comb-shaped porphyrin end-functionalized poly(N-isopropylacrylamide)-b-poly[oligo (ethylene glycol methyl ether methacrylate)] (Por-PNIPAM-b-POEGMA) was synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization. Due to the incorporation of hydrophilic POEGMA contents, the copolymer shows the lower critical solut...
A novel zinc(II) tetraaminophthalocyanine ended block copolymer methoxypolyethylene glycol-b-poly(N-isopropylacrylamide) (MPEG-b-PNIPAAM-ZnTAPc) had been synthesized through an easy way. First, the diblock copolymers MPEG-b-PNIPAAM were synthesized by atom transfer radical polymerization (ATRP) and functionalized with one molecule of maleic anhydri...
A series of chain-end functional polymers composed of poly(N-isopropylacrylamide) (PNIPAM) and 2-amino-2-deoxy-d-glucopyranose(d-glucosamine, GA) was synthesized via atom transfer radical polymerization (ATRP). Novel fluorescent complexes of glucosamine-PNI- PAM/Eu(III) were then formed by chelation of the polymers and europium(III) ions. The aqueo...
We report the synthesis, morphology, and properties of poly(3-hexylthiophene)-block-poly(butyl acrylate) (P3HT-b-PBA) for stretchable electronics applications, which are consisted of semiconducting P3HT and low glass transistion temperature (Tg) PBA blocks. The P3HT-b-PBA thin films self-assembled into fibrillar-like nanostructures and maintained t...
Regioselective modification of D-glucosamine (2-amino-2-deoxy-D-glucopyranose, GA) through C-1 and C-2 positions to synthesized thermo-responsive D-Glucosamine-poly(N-isopropylacrylamide) (PNIPAM) via atom transfer radical polymerization (ATRP) was investigated for the first time. Two different schemes of the synthesis for GA derivatives (GA-PNIPAM...
Diblock copolymers consisting of electron-donating poly[2,7-(9,9-dihexylfluorene)] (PF) rods and electron-withdrawing poly(pendent isoindigo) (Piso) coils were designed and synthesized through a click reaction. The electronic properties and interchain organization of the copolymers could be tuned by varying the PF/Piso ratio (PF14-b-Pison (n=10, 20...
The syntheses of linear, cyclic, and star-shaped poly(N,N-diethylacrylamide)s (PDEAAms) have been studied in order to clarify the topological effect on their thermoresponsive properties. For the group transfer polymerization of N,N-diethylacrylamide using tris(pentafluorophenyl)borane (B(C6F5)3) as the organocatalyst, the α-, ω-, and α,ω-end-functi...
In contrast to the conventional group transfer polymerization (GTP) using a catalyst of either an anionic nucleophile or a transition‐metal compound, the organocatalyzed GTP has to a great extent improved the living characteristics of the polymerization from the viewpoints of synthesizing structurally well‐defined acrylic polymers and constructing...
This paper describes the systematic investigation into the aqueous self-assembly of a series of block copolymers (BCPs) consisting of maltoheptaose (MH; as the A block) and poly(μ-caprolactone) (PCL; as the B block), i.e., linear AB-type diblock copolymers with varied PCL molecular weights (MH-b-PCL(2.5k,3.3k,5k,10k)), ABy-type (y = 2, MH-b-(PCL5k)...
We report here a facile method to prepare ABB′ and ABC type miktoarm star copolymers by a combination of nitroxide-mediated radical polymerization (NMRP) and ring opening polymerization (ROP). The first two arms were prepared by sequential NMRP of the same or different monomers, e.g. styrene and tert-butyl methacrylate (tBMA). The hydroxyl group wa...
The heat-induced phase transition of aqueous solutions of Poly(N-isopropylacrylamide) (PNIPAM) in water is examined for a four-arm PNIPAM star (s-PNIPAM), a cyclic PNIPAM (c-PNIPAM), and their linear counterparts (l-PNIPAM) in the case of polymers (1.0 g L-1) of 12,700 g mol-1< Mn<14,700 g mol-1. Investigations by turbidity, high-sensitivity differ...
The star-shaped and diblock copolymer poly (6-[4-(4-methoxyphenylazo)phenoxy]hexylmethacrylate)s-b-poly(N-isopropylacrylamide)s with zinc-porphyrin core (PAzo-b-PNIPAM) is synthesized via consecutive atom transfer radical polymerizations (ATRPs). The synthesis involve the preparation of the intermediate poly(6-[4-(4-methoxyphenylazo)phenoxy]hexyl m...
The tris(pentafluorophenyl)borane- (B(C6F5)3-) catalyzed group transfer polymerization (GTP) of N,N-disubstituted acrylamide (DAAm) using a moisture-tolerant hydrosilane (HSi) as part of the initiator has been intensively investigated in this study. The screening experiment using various HSis suggested that dimethylethylsilane (Me2EtSiH) with the l...
Field-effect transistor memories usually require one additional charge storage layer between the gate contact and organic semiconductor channel. To avoid such complication, new donor–acceptor rod–coil diblock copolymers (P3HT44-b-Pison) of poly(3-hexylthiophene) (P3HT)-block-poly(pendent isoindigo) (Piso) are designed, which exhibit high performanc...
This review describes the recent progress in the design and fabrication of polyacetylene-based chemosensors applicable to colorimetric and fluorescence anion sensing that has been increasingly demanded in diverse fields. The validity of polyacetylene derivatives as an anion sensor material has been demonstrated based on the evaluation of the anion-...
A comprehensive set of amphiphilic star-shaped block copolyethers with a fixed molecular weight and composition was synthesized via the t-Bu-P4-catalyzed ring-opening polymerization (ROP) of 2-(2-(2-methoxyethoxy)ethoxy)ethyl glycidyl ether as a hydrophilic monomer and decyl glycidyl ether as a hydrophobic monomer. The three- and four-armed star-bl...
We report the synthesis, morphology, and field effect transistor memory application of maltoheptaose-based block copolymers, maltoheptaose-block-poly(1-pyrenylmethyl methacrylate) (MH-b-PPyMA), and their supramolecules with (4-pyridyl)-acceptor-(4-pyridyl), MH(4Py-Acceptor-4Py)x-b-PPyMA. MH-b-PPyMA was prepared by the combination of the t-Bu-P4-cat...
The present review summarizes our recent results regarding the synthesis and morphological characterization of sugar-based hybrid block copolymers (BCPs) consisting of maltoheptaose (MH) and poly(ε-caprolactone) (PCL). The AB-, AB2-, AB3-, ABA-, and A2B-type BCPs, in which the A and B blocks are MH and PCL, respectively, were synthesized by combini...
The synthesis of miktoarm star-shaped polymers has been studied using various poly(methyl methacrylate)s (PMMAs) functionalized with a hydroxyl group, which were prepared by organocatalyzed group transfer polymerization (GTP) of methyl methacrylate, followed by Mukaiyama aldol-type termination of a silyl ketene acetal (SKA) moiety at the living PMM...
Miktoarm star-shaped copolymers with controlled molecular weights and narrow molecular weight distribution (M w /M n s) were prepared via a combination of t-BuP 4-catalyzed group transfer polymerization (GTP) and ring opening polymerization (ROP) using Hydroxyl-functionalized poly(methyl methacrylate)s as initiators at room temperature. The Hydroxy...
A series of rod-coil miktoarm star copolymers consisting of poly[2,7-(9,9-dihexylfluorene)] (PF) and polylactide (PLA) arms as the rod and coil segments, respectively, were synthesized by combining the chain-growth Suzuki-Miyaura coupling polymerization and living ring-opening polymerization (ROP). First, PFs having a hydroxyl group at the α-chain...
The group transfer polymerization (GTP) of N,N-diethylacrylamide (DEAA) was studied using various combinations of an organic acid of N-(trimethylsilyl)bis-(trifluoromethanesulfonyl)imide (Me3SiNTf2), 1-(2,3,4,5,6-pentafluorophenyl)-1,1-bis(trifluoromethanesulfonyl)methane (C6F5CHTf2), and tris(penta-fluorophenyl)borane (B(C6F5)3) and a silyl ketene...
Two series of crystalline−crystalline miktoarm star polymers were prepared and their thin film morphologies were investigated in detail by synchrotron grazing incidence X-ray scattering (GIXS): poly(n-hexyl isocyanate)(5000)−poly(ε-caprolactone) 1−3 (17000) (PHIC(5k)−PCL 1−3 (17k)) and poly(n-hexyl isocyanate)(10000)−poly(ε-caprolactone) 1−3 (10000...
We report the synthesis and electric device applications of oligosaccharide-based diblock copolymers consisting of a maltoheptaose (MH) block and a poly(4-oligofluorenylstyrene) block (PStFln, n = 1 or 2), referred to as MH-b-PStFln. MH-b-PStFln was prepared by the Cu(I)-catalyzed click reaction of azido-terminated PStFln (PStFln-N3), which was obt...
The combination of t-Bu-P4 and alcohol was found to be an excellent catalytic system for the controlled/living ring-opening polymerization (ROP) of N,N-disubstituted glycidylamine derivatives, such as N,N-dibenzylglycidylamine (DBGA), N-benzyl-N-methylglycidylamine, N-glycidylmorpholine, and N,N-bis(2-methoxyethyl)glycidylamine, to give well-define...
The present study describes the precise synthesis and thermoresponsive properties of two types of four-arm star-shaped poly(N-isopropylacrylamide)s (PNIPAM), i.e., the covalently linked one (3) and the non-covalently Ru(II)-chelated one (5). The atom transfer radical polymerization (ATRP) method was used to prepare the azido-terminated PNIPAM (1) a...
Four poly(phenylacetylene)s () bearing phenylcarbamate residues of L-phenylglycinol and amide linkage as pendants were prepared to be used as chiral stationary phases (CSPs) for high-performance liquid chromatography (HPLC), and the influences of coating solvents, dimethylformamide (DMF) and tetrahydrofuran (THF), which were used for coating the po...
This comprehensive paper describes the anionic ring-opening polymerization of substituted epoxides using a phosphazene base catalyst, t-Bu-P4, and its application for the synthesis of architecturally complex polyethers. The t-Bu-P4-catalyzed ROP of 1,2-butylene oxide (BO) produced the poly(BO) having the predicted molecular weight and narrow polydi...
The group transfer polymerization (GTP) of alkyl methacrylates has been studied using hydrosilane and tris(pentafluorophenyl)borane (B(C6F5)3) as the new initiation system. For the B(C6F5)3-catalyzed polymerization of methyl methacrylate (MMA) using triethylsilane, tri-n-butylsilane (nBu3SiH), dimethylphenylsilane (Me2PhSiH), triphenylsilane, and t...
We report the synthesis and characterization of multifunctional triblock copolymers, poly(1-pyrenemethylmethacrylate)-block-poly(N-isopropylacrylamide)-block-poly(N-methylolacrylamide) (PPy-b-PNIPAAm-b-PNMA), and their electrospun (ES) nanofibers for temperature or metal-ion sensing. The triblock copolymers are composed of fluorescent and metal-ion...
: The ring-opening polymerization (ROP) of 1,5-dioxepan-2-one (DXO) catalyzed by diphenyl phosphate (DPP) using 3-phenyl-1-propanol (PPA) as an initiator has been studied. The polymerization in toluene at room temperature produced poly(1,5-dioxepan-2-one) (PDXO) with a narrow polydispersity index. For the initial [DXO]0/[PPA]0/[DPP]0 of 50/1/1, the...
The present paper describes the sub-10 nm scale self-assembly of AB-type diblock, ABA-type triblock, and A2B-type miktoarm star copolymers consisting of maltoheptaose (MH: A block) and polystyrene (PS: B block). These block copolymers (BCPs) were synthesized through coupling of end-functionalized MH and PS moieties. Small-angle X-ray scattering and...
The group transfer polymerization (GTP) with N-(trimethylsilyl)bis(trifluoromethanesulfonyl)imide (Me3SiNTf2) and 1-methoxy-1-triisopropylsiloxy-2-methyl-1-propene (iPr-SKA) has been studied using methyl acrylate (MA), ethyl acrylate (EA), n-butyl acrylate (nBA), 2-ethylhexyl acrylate (EHA), cyclohexyl acrylate (cHA), dicyclopentanyl acrylate (dcPA...
Group transfer polymerization (GTP) as one of the living polymerizations was put forward over 30 years ago by DuPont for the upscale and cost-reducing synthesis of acrylic polymers. In the GTP process, a silyl ketene acetal compound is used as an initiator and a Lewis base/acid as the catalysts, and polymerizations can be operated at advantageously...
The present study describes the α- and ω-end-functionalization of poly(methyl methacrylate)s (PMMAs) by the organocatalyzed group transfer polymerization (GTP) using both functional silyl ketene acetal (SKA) initiators and α-phenylacrylate terminators. The syntheses of structurally defect-free α-end-functionalized PMMAs with hydroxyl, ethynyl, viny...
A series of novel stereoregular one-handed helical poly(phenylacetylene) derivatives (PPA-1 and PPA-1a∼g) bearing L-phenylglycinol and its phenylcarbamate residues as pendants was synthesized for use as chiral stationary phases (CSPs) for HPLC, and their chiral recognition abilities were evaluated using 13 racemates. The phenylcarbamate residues in...
A series of miktoarm star polymers, [poly(n-hexyl isocyanate)(12K)]–[poly(ε-caprolactone)1–3(5K)] (PHIC–PCL1–3) (composed of a rigid self-assembling PHIC arm and one to three flexible crystallizable PCL arms), were investigated to examine the polymers’ thermal properties and nanoscale thin film morphologies. The miktoarm polymers were stable up to...
The nanoscale thin film morphologies of a series of interesting miktoarm star polymers composed of a highly rigid and crystallizable poly(n-hexyl isocyanate) (PHIC) arm and one to three flexible and crystallizable poly(ε-caprolactone) (PCL) arms were investigated
using synchrotron grazing incidence X-ray scattering methods. Nanoscale thin films of...
Random and block copolymerizations of poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA) macromonomers having an exo-norbornene group at the α- or ω-chain end (D/L ratio = 1/1, Mn = ca. 5000 g mol–1) were performed via ring-opening metathesis polymerization to produce the brush random and block copolymers consisting of parallel or antiparallel align...
The group transfer polymerization (GTP) of n-butyl acrylate (nBA) using hydrosilane (R3SiH) and tris-(pentafluoropheny)borane (B(C6F5)(3)) has been studied, which did not need to use the initiator of a silyl ketene acetal (SICA) as the starting polymerization component. B(C6F5)(3) catalyzed the in situ 1,4-hydrosilylation of nBA by R3SiH to generat...
The alpha-functionalized (hydroxyl, ethynyl, vinyl, and norbornenyl), omega-functionalized (ethynyl, vinyl, hydroxyl, and bromo), and alpha,omega-functionalized polyacrylates were precisely synthesized by the N-(trimethylsily)bis-(trifluoroethanesulfonyl)imide (Me3SiNTf2)-catalyzed group transfer polymerization (GTP) of n-butyl acrylate (nBA). The...
A series of well-defined linear poly(N-isopropyl acrylamide) with an asymmetrical zinc(II) porphyrin (ZnPor–PAM) end group was synthesized by atom transfer radical polymerization, wherein 5,10,15,20-tetra(p-bromopropanoyloxyethylphenyl) zinc porphyrin tripropionate was used as the initiator and CuBr/tris(2-dimeoethyl)amine was used as the catalyst...
The ring-opening polymerization (ROP) of β-butyrolactone (β-BL) has been studied using the organocatalysts of diphenyl phosphate (DPP) and bis(4-nitrophenyl) phosphate (BNPP). The controlled ROP of β-BL was achieved using BNPP, whereas that of using DPP was insufficient because of its low acidity. For the BNPP-catalyzed ROP of β-BL, the dual activa...
The t-Bu-P4-catalyzed group transfer polymerization (GTP) of 2-(dimethylamino)ethyl methacrylate (DMAEMA) using multi-functional GTP initiators that bear multiple silyl ketene acetal moieties (MTS3, MTS4, MTS6, and MTS12) homogeneously proceeded and rapidly completed to afford well-defined star-shaped poly[2-(dimethylamino)ethyl methacrylate]s (s-P...
Organic nonvolatile transistor memory devices of the n-type semiconductor, N,N'-bis(2-phenylethyl)-perylene-3,4:9,10-tetracarboxylic diimide (BPE-PTCDI), were prepared using various electrets, i.e., three-armed star-shaped poly[4-(diphenylamino)benzyl methacrylate] (N(PTPMA)3) and its blends with 6,6-phenyl-C61 butyric acid methyl ester (PCBM), 6,1...
This study describes the first convenient preparation of 3-, 4-, 5-, 6-, 7-, 8-, 9-, 10-, 11-, and 12-armed star-shaped poly(styrene oxide) (PSO) Ru(II) complexes using a click-to-chelate approach. This approach involves the combination of the click reaction and stepwise chelating reactions of Ru(II)(DMSO)4Cl2 with macroligands, 2-(1-PSOn-1,2,3-tri...
A series of well-defined star-shaped poly(N-isopropylacrylamide) (ZnTHPP-PAM) with zinc-porphyrin as the core was synthesized by atom transfer radical polymerization (ATRP). Zinc(II)meso-tetra(p-bromopropionylphenyl)porphyrin (ZnTHPP-Br) was employed as the initiator, and CuBr/tris(2-dimeoeth-yl)amine(Me6TREN) was selected as the catalyst system. T...
A model chiral graft copolymer, poly(phenylacetylene)-g-poly(n-hexyl isocyanate) (PPA-g-PHIC), in which a chiral moiety is located at the end of each PHIC side chain, was synthesized. First, chiral PHIC macromonomers with a phenylacetylene end group were synthesized via living anionic polymerization using the functional initiator sodium N-(4-ethyny...
Provided is a water-based lubricant comprising a hyperbranch-type polyglycerol having an absolute molecular weight of from 5,000 to 500,000. The water-based lubricant has a small friction coefficient and is excellent in lubrication performance and defoamability, as compared with conventional water-based lubricants comprising an ethylene/propylene o...
This paper describes the synthesis of systematic sets of figure-eight- and tadpole-shaped amphiphilic block copolyethers (BCPs) consisting of poly(decyl glycidyl ether) and poly[2-(2-(2-methoxyethoxy)ethoxy)ethyl glycidyl ether], together with the corresponding cyclic counterparts, via combination of the t-Bu-P4-catalyzed ring-opening polymerizatio...