Herman H-Y Sung

Herman H-Y Sung
The Hong Kong University of Science and Technology | UST · Department of Chemistry

Doctor of Philosophy

About

355
Publications
33,641
Reads
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14,505
Citations
Citations since 2016
192 Research Items
9354 Citations
201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500
Additional affiliations
November 2008 - present
The Hong Kong University of Science and Technology
Position
  • Senior Technical Officer
October 2003 - October 2008
The Hong Kong University of Science and Technology
Position
  • Technician
October 2001 - September 2003
The Hong Kong University of Science and Technology
Position
  • Research Associate
Education
September 1997 - September 2001

Publications

Publications (355)
Article
Due to the fast dynamics and re‐equilibration of supramolecular self‐assembly, the bottom‐up molecular strategy to fabricate well‐defined and controllable multiblock structures is still rare. Herein, we proposed a new concept for fabrication of fluorescent multiblock microcolumns from 1 to 7 blocks via hierarchical supramolecular self‐assembly base...
Article
Due to the fast dynamics and re‐equilibration of supramolecular self‐assembly, the bottom‐up molecular strategy to fabricate well‐defined and controllable multiblock structures is still rare. Herein, we proposed a new concept for fabrication of fluorescent multiblock microcolumns from 1 to 7 blocks via hierarchical supramolecular self‐assembly base...
Article
Full-text available
A family of: 1:1 cocrystals 11-Aza:4-X-SalA have been prepared from the potent anti-malarial compound 11-azaartemisinin with 4-halosalicylic acids. When X = 4-Cl, 4-Br and 4-I, two conformational polymorphs can be isolated in each case. Monoclinic type-I was found previously for parent 11-Aza:SalA (1) and 11-Aza:4-Br-SalA (3a) which have polar 21 s...
Article
Full-text available
The G-quadruplex (G4) forming C9orf72 GGGGCC (G4C2) expanded hexanucleotide repeat (EHR) is the predominant genetic cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Developing selective G4-binding ligands is challenging due to the conformational polymorphism and similarity of G4 structures. We identified three first-i...
Article
Fluorescence imaging in the second near-infrared window (NIR-II, 1000-1700 nm) using small-molecule dyes has high potential for clinical use. However, many NIR-II dyes suffer from the emission quenching effect and extremely low quantum yields (QYs) in the practical usage forms. The AIE strategy has been successfully utilized to develop NIR-II dyes...
Article
All-inorganic copper(I)-based metal halides have emerged as promising candidates for the replacement of lead perovskites because of their outstanding optical properties. However, the limited structure tunability prohibits their further exploration of properties including red photoluminescence (PL). Here, we report a series of red-emissive lead-free...
Article
Full-text available
Clusteroluminogens refer to some non-conjugated molecules that show visible light and unique electronic properties with through-space interactions due to the formation of aggregates. Although mature and systematic theories of molecular photophysics have been developed to study conventional conjugated chromophores, it is still challenging to endow c...
Article
Bacteria in marine biofilms are a rich reservoir of natural products. To facilitate novel secondary metabolite discovery, we investigated the metabolic profile of a marine biofilm-derived Bacillus sp. B19-2 by combining bioinformatics and LC-UV-MS analyses. After dereplication and purification of putatively unknown compounds, a new family of compou...
Article
Full-text available
Chiral metal‐halide hybrids have aroused widespread attention owing to their chemical and structural versatilities as well as unique optoelectronic and spin‐dependent properties. Several recent experiments have shown that organic chirality results in circularly polarized absorption and emission from the inorganic metal‐halide subcomponent; however,...
Article
The reactivity of low‐valent alkyl‐substituted metallacyclobutadienes towards electron‐rich alkynes was studied. Treatment of the alkyl‐substituted rhenacyclobutadiene complexes Re{−C(R)=C(CO2Et)C(OEt)=}(CO)4 (R=Me, Et) with HC≡COEt produced a mixture of the cyclopentadienyl complexes Re{η5‐C5H(R)(CO2Et)(OEt)2}(CO)3 and the new rhenacyclobutadienes...
Preprint
Full-text available
Fluorescence imaging in the second near-infrared window (NIR-II, 1000-1700 nm) using small-molecule dyes is highly potential for clinical use. However, many NIR-II dyes suffer from the emission quenching effect and extremely low quantum yields (QYs) in the practical usage forms. The AIE strategy has been successfully utilized to develop NIR-II dyes...
Preprint
Full-text available
Molecular motion is related to the structures and properties of the molecules and their aggregates. Owing to both weak intermolecular interactions and complicated interplay between molecules, the manipulation of inter-molecular motion to realize specific structures and properties as well as applications, is challenging but attractive. Here, we repo...
Article
Organic near‐infrared (NIR) luminogens have attracted intensive attention considering their vast potential applications in areas like bioimaging, organic light‐emitting diodes (OLEDs) and night‐vision telecommunication. However, organic NIR luminogens with high solid quantum efficiency are scarce, limiting the ir applications. Here, we reported an...
Article
A nitrido-bridged heterometallic iron(IV) chloride complex supported by a tetradentate Schiff base ligand has been synthesized and its chloride substitution reactions have been studied. Treatment of the Fe(II) Schiff base complex [Fe(Br4saloph)(py)] (H2Br4saloph = N,N’-bis(3,5-dibromosalicylidene)-1,2-phenylenediamine; py = pyridine) with the Ru(VI...
Article
Dewar benzenes, the metastable valence isomers of benzenes, have been extensively studied both experimentally and theoretically. In contrast, little is known about Dewar metallabenzenes having a transition metal in the skeletal framework, despite the recent intensive interest in the development of chemistry of metallabenzenes. Herein, we report the...
Article
Dewar benzenes, the metastable valence isomers of benzenes, have been extensively studied both experimentally and theoretically. In contrast, little is known about Dewar metallabenzenes having a transition metal in the skeletal framework, despite the recent intensive interest in the development of chemistry of metallabenzenes. Herein, we report the...
Article
Heterometallic μ‐nitrido complexes have been synthesized from reactions of organometallic complexes containing oxygen and sulfur donor ligands with a ruthenium(VI) nitride. The treatment of [Ir(tpip)(L) 2 ] (tpip ‐ = [N(Ph 2 PO) 2 ] – , L = cyclooctene (coe) or 2,6‐dimethylphenylisocyanide (xylNC)) and [Ir{N( i Pr 2 PS) 2 }(coe)] with [Ru(L OEt )(N...
Article
Asymmetric synthesis of chiral pyrrolidines bearing an all-carbon quaternary stereocenter in the 3-position remains challenging. Herein we report two efficient protocols by means of oxetane desymmetrization, featuring the use of a readily available tert-butylsulfinamide chiral auxiliary and a catalytic system with chiral phosphoric acid as the sour...
Article
The development of new polymerization routes to afford N-heterocyclic polymers is of vital importance and highly desired for various practical applications. Herein, a facile and efficient polyannulation reaction of dual-activated alkyne and pyridines was developed to construct novel N-heterocyclic poly(quinolizine)s. This polymerization can proceed...
Article
Molecular motions are ubiquitous in nature and they immutably play intrinsic roles in all actions. However, exploring appropriate models to decipher molecular motions is an extremely important but very challenging task for researchers. Considering aggregation-induced emission (AIE) luminogens possess their unique merits to visualize molecular motio...
Article
Molecular motions are ubiquitous in nature and they immutably play intrinsic roles in all actions. However, exploring appropriate models to decipher molecular motions is an extremely important but very challenging task for researchers. Considering aggregation-induced emission (AIE) luminogens possess their unique merits to visualize molecular motio...
Preprint
Full-text available
Clusteroluminogens (CLgens) refer to some non-conjugated molecules that show visible light due to the formation of aggregates and unique electronic properties with through-space interactions (TSI). Although mature and systematic theories of molecular photophysics have been developed to study conventional conjugated chromophores, it is still challen...
Preprint
Full-text available
Molecular motions are ubiquitous in nature and they immutably play intrinsic roles in all actions. However, exploring appropriate models to decipher molecular motions is an extremely important but very challenging task for researchers. Considering aggregation-induced emission (AIE) luminogens possess their unique merits to visualize molecular motio...
Preprint
Full-text available
Nature possesses a powerful ability to assemble multiple complex structures to fabricate hierarchical biological structures in a living-assembled way. However, it is still a huge challenge for artificial systems to fabricate and characterize hierarchical living assemblies with well-defined and controllable but complex structures. In this work, we p...
Article
Molecular interactions are crucial in diverse fields of protein folding, material science, nanotechnology, and life origins. Although mounting experimental research controls luminescent behavior by adjusting molecular interactions in light-emitting materials, it remains elusive to correlate microscopic molecular interactions with macroscopic lumine...
Article
Ternary copper halides have garnered significant interest for their bright, high quantum yield emission stemming from the radiative decay of self‐trapped excitons (STEs). Cesium copper halides have shown promise for use in optoelectronics, including light‐emitting devices (LEDs) for lighting and displays. To date several synthetic procedures for Cs...
Article
The X-ray structures of three new 1:1 pharmaceutical cocrystals of 11-azaartemisinin (11-Aza; systematic name: 1,5,9-trimethyl-14,15,16-trioxa-11-azatetracyclo[10.3.1.0 4,13 .0 8,13 ]hexadecan-10-one, C 15 H 23 NO 4 ) with bromo-substituted salicylic acids [namely, 5-bromo- (5-BrSalA, C 7 H 5 BrO 3 ), 4-bromo- (4-BrSalA, C 7 H 5 BrO 3 ) and 3,5-dib...
Article
In an effort to synthesize cyclometalated iridium complexes containing a tridentate C^N^C ligand, transmetallation of [Hg(HC^N^C)Cl] (1) (H2C^N^C = 2,6-bis(4-tert-butylphenyl)pyridine) with various organoiridium starting materials has been studied. The treatment...
Preprint
Full-text available
p>Experimental and theoretical analysis demonstrated that the active intramolecular motions in the excited state of all molecules at single molecule level imparted them with more twisted structural conformations and weak emission. However, owing to the restriction of intramolecular motions in the nano/macro aggregate state, all the molecules assume...
Preprint
Full-text available
a>Apart from the traditional through-bond conjugation (TBC), through-space conjugation (TSC) is gradually proved as another important interaction in photophysical processes, especially for the recent observation of clusteroluminescence from nonconjugated molecules. Herein, simple and nonconjugated triphenylmethane (TPM) and its derivatives with ele...
Article
Full-text available
The study of nonconventional luminescence is important for revealing the luminescence of natural systems and has gradually drawn the attention of researchers in recent years. However, the underlying mechanism is still inexplicable. Herein, the luminescence behavior of two series of simple, heteroatom‐containing small molecules without aromatic ring...
Article
Full-text available
The development of dark pro‐aggregation‐induced‐emission luminogens (pro‐AIEgens) based on the solid‐state intramolecular motion–caused quenching effect has been rarely reported in biochemical analysis. Herein, an azo‐conjugated pro‐AIEgen derived from tetraphenylethene is constructed. Due to the active molecular motion of the azo bond, it retains...
Article
Reactions of Cp*OsCl(PPh 3 ) 2 (Cp* = pentamethylcyclopentadienyl) with alkynes and alkynols are described. Treatment of Cp*OsCl(PPh 3 ) 2 with phenylacetylene and trimethylsilylacetylene gave the vinylidene complexes Cp*OsCl(=C=CHPh)(PPh 3 ) and Cp*OsCl(=C=CH 2 )(PPh 3 ), respectively. Treatment of Cp*OsCl(PPh 3 ) 2 with the internal alkyne dimeth...
Article
Tetravalent cerium alkoxide complexes supported by the Kläui tripodal ligand [Co(η5-C5H5){P(O)(OEt)2}3]- (LOEt-) have been synthesized, and their nucleophilic and redox reactivity have been studied. Treatment of the Ce(IV) oxo complex [CeIV(LOEt)2(O)(H2O)]·MeCONH2 (1) with i PrOH or reaction of [CeIV(LOEt)2Cl2] (2) with Ag2O in i PrOH afforded th...
Article
Full-text available
Bromide‐based organo‐metal halide perovskites have shown great potential for use in tandem solar cells, LEDs and photodetectors. Here, we report a new protocol using a one‐step deposition method for producing formamidinium lead bromide (FAPbBr3) perovskites, which features a solvent engineered intermediate phase to achieve superior films. For the f...
Article
Full-text available
Developing versatile synthetic methodologies with merits of simplicity, efficiency, and environment friendliness for five-membered heterocycles is of incredible importance to pharmaceutical and material science, as well as a huge challenge to synthetic chemistry. Herein, an unexpected regioselective photoreaction to construct a fused five-membered...
Article
Full-text available
Organic photovoltaic (OPV) is one of the most promising technologies to power indoor electronic devices. However, the limited types and design strategies of medium band-gap acceptor materials hinder the development...
Preprint
p>The single-component white-light-emitting materials play an essential role in the next-generation solid-state lighting technology. Herein, linear gold(I) complex TPPGPA with conglobate trimer configuration trigged by aurophilic interactions in crystalline state was prepared to emit dual phosphorescent white-light emission, which also exhibited mu...
Article
Chemists are always seeking new methods to construct porous lattice frameworks from simple motifs. To date, the most common tectons of reported porous frameworks are predesigned multi‐armed scaffolds with C3, C4 or C6 symmetry. Linear two‐armed tectons with C2 symmetry are easier to synthesize but cannot form porous architectures by themself, unles...
Article
A linear ionic molecule forms a stable framework with open pores through X‐aggregation packing, facilitated by a combination of trident‐type ionic interactions and π–π stacking. The nano‐tunnel exhibits anisotropic guest diffusion, excellent chemical stability, large CO2 uptake with high CO2/CH4 selectivity, and vapochrometric behavior. Abstract H...
Article
Full-text available
The potent anti­biotics albofungin [systematic name: (1S,4R,8aR)-13-amino-1,15,16-trihy­droxy-4-meth­oxy-12-methyl-3,4,8a,13-tetra­hydro-1H-xantheno[4′,3′,2′:4,5][1,3]benzodioxino[7,6-g]iso­quinoline-14,17(2H,9H)-dione, C27H24N2O9, 1] and its chlorinated analogue chloro­albofungin (the 11-chloro analogue, C27H23ClN2O9, 2) have been crystallized fol...
Article
Reactions of the rhenium polyhydride ReH5(PMe2Ph)3 with propargyl alcohols in the presence of HCl can produce γ-hydroxycarbyne, vinylcarbyne and η²-vinyl complexes, the relative amounts of which are dependent on the substituents of the propargyl alcohols. The reaction with the bis-alkyl substituted propargyl alcohol HC≡CC(OH)Me2 produced only the v...
Preprint
Full-text available
The study on non-conventional luminescence is important for revealing the luminescence of natural systems and has gradually drawn the attention of researchers in recent years. However, the underlying mechanism is still inexplicable. Herein, the luminescence behaviors of two series of simple, heteroatom-containing small molecules without aromatic ri...
Preprint
The development of dark pro-AIEgens based on solid-state intramolecular motion-caused quenching effect has been rarely reported in biochemical analysis. Herein, an azo-conjugated pro-AIEgen derived from tetraphenylethene is constructed. Owing to the active photoisomerization of the azo bond, it retains a non-emissive property in both solution and s...
Preprint
In the field of fluorescent materials, bright deep-red/near-infrared (DR/NIR) luminogens are always in demand whose rationally and accurately design yet are challenging. Current design strategy of DR/NIR emitters mainly depends on the construction of large p-conjugation and strong donor-acceptor system, which commonly suffers the quenching factors...
Article
The treatment of [M(LOEt)(N)Cl2] (LOEt−=[Co(η5‐C5H5){P(O)(OEt)2}3]−) with the Pt(II) bis(cyclometalated) complex [Pt(C N CBu)(DMSO)] (H2C N CBu=2,6‐di(4‐tert‐butylphenyl)pyridine; DMSO=dimethylsulfoxide) afforded the heterotrinuclear nitrido complexes [LOEtCl2M(μ‐N)Pt(C N CBu)] (M=Ru (1‐Ru), Os (1‐Os)). The Pt−N(nitrido) (1.821(5) Å) and Ru−N (1.67...