A5100711083- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organometallic Complex Synthesis and Catalysis
- Organoboron and organosilicon chemistry
- Asymmetric Hydrogenation and Catalysis
- Catalytic C–H Functionalization Methods
- Crystallography and molecular interactions
- Catalytic Cross-Coupling Reactions
- Synthesis and characterization of novel inorganic/organometallic compounds
- Catalytic Alkyne Reactions
- Cyclopropane Reaction Mechanisms
- Boron Compounds in Chemistry
- Inorganic Chemistry and Materials
- Synthetic Organic Chemistry Methods
- Coordination Chemistry and Organometallics
- Carbon dioxide utilization in catalysis
- Magnetism in coordination complexes
- Advanced Chemical Physics Studies
- Asymmetric Synthesis and Catalysis
- Metal complexes synthesis and properties
- Nanocluster Synthesis and Applications
- Synthesis and Catalytic Reactions
- Chemical Synthesis and Analysis
- Radical Photochemical Reactions
- Radioactive element chemistry and processing
Hong Kong University of Science and Technology
2016-2025
University of Hong Kong
2016-2025
Chinese Academy of Sciences
1988-2025
University of Chinese Academy of Sciences
2025
Institute of Microbiology
2025
Guangzhou Institute of Energy Conversion
2025
University of Science and Technology of China
2023-2024
Shanghai Institute of Technology
2024
Zhongshan Hospital of Xiamen University
2023-2024
Fudan University
2022-2024
The catalytic activity of a series ruthenium(II) complexes in azide-alkyne cycloadditions has been evaluated. [Cp*RuCl] complexes, such as Cp*RuCl(PPh 3) 2, Cp*RuCl(COD), and Cp*RuCl(NBD), were among the most effective catalysts. In presence 2 or primary secondary azides react with broad range terminal alkynes containing functionalities selectively producing 1,5-disubstituted 1,2,3-triazoles; tertiary significantly less reactive. Both also promote cycloaddition reactions organic internal...
Abstract A new and synthetically versatile strategy has been developed for the phosphorescence color tuning of cyclometalated iridium phosphors by simple tailoring phenyl ring ppy (Hppy = 2‐phenylpyridine) with various main‐group moieties in [Ir(ppy‐X) 2 (acac)] (X B(Mes) , SiPh 3 GePh NPh POPh OPh, SPh, SO Ph). This can be achieved shifting charge‐transfer character from pyridyl groups some traditional ppy‐type complexes to electron‐withdrawing these assignments were supported theoretical...
A simple but effective copper-catalyzed borylation of aryl halides, including electron-rich and sterically hindered bromides, with alkoxy diboron reagents occurs under mild conditions (see scheme). Preliminary DFT studies the mechanism suggest that sigma-bond metathesis between a copper-boryl intermediate halide generates boronate product.
In this feature article, we discuss selected recent aspects of metal boryl (M-BR2) chemistry pertaining, in particular, to the role late and post-transition complexes various catalytic processes. The exceptionally strong sigma-donor properties ligands their related nucleophilic behaviour are highlighted.
The merger of photoredox catalysis with asymmetric copper have been realized to convert achiral carboxylic acids into enantiomerically enriched alkyl nitriles. Under mild reaction conditions, the exhibits broad substrate scope, high yields and enantioselectivities. Furthermore, can be scaled up synthesize key chiral intermediates bioactive compounds.
A new organocatalytic transfer hydrogenation strategy for the asymmetric synthesis of 1,1-diarylethanes is described. Under mild conditions, a range substituted with an o-hydroxyphenyl or indole unit could be obtained excellent efficiency and enantioselectivity. We also extended protocol to unprecedented hydroarylation 1,1-diarylalkenes indoles highly enantioenriched 1,1,1-triarylethanes bearing acyclic all-carbon quaternary stereocenters. These diaryl- triarylethanes exhibit impressive...
We have developed a copper-catalyzed enantioselective intermolecular aminoarylation of alkenes using novel N-fluoro-N-alkylsulfonamide as the amine reagent, which could react with Cu(I) catalyst to release related amino radical. After addition styrene, generated benzylic radical couple chiral L*CuIIAr complex achieve arylation. Various optical 2,2-diarylethylamines were efficiently synthesized from simple styrenes high enantioselectivity, and these products can serve valuable synthons toward...
Although chiral allene preparation via formal SN2' nucleophilic substitutions of enantioenriched propargylic derivatives or metal-catalyzed reactions racemic has attracted considerable attention and found applications in many areas research, direct use alcohols instead for catalytic asymmetric synthesis is unknown. Here, we show that a highly enantioselective tetrasubstituted allenes from been realized by organocatalysis with good efficiency (up to 96% yield 97% ee). The intermolecular C-C...
Lewis base adducts of tetra-alkoxy diboron compounds, in particular bis(pinacolato)diboron (B2 pin2 ), have been proposed as the active source nucleophilic boryl species metal-free borylation reactions. We report isolation and detailed structural characterization (by solid-state solution NMR spectroscopy X-ray crystallography) a series anionic B2 with hard bases, such alkoxides fluoride. The study was extended to alternative acetate, other reagents. B(sp(2) )-B(sp(3) ) exhibit two distinct...
Abstract Asymmetric copper‐catalyzed intermolecular amino‐ and azidocyanation reactions of alkenes have been developed that proceed via a radical process in which key benzylic intermediate is enantioselectively trapped by chiral Box/Cu II cyanide complex. A variety enantiomerically enriched β‐amino/azido alkylnitriles were efficiently synthesized. The β‐azido could be converted into series highly valuable optically active amine‐based building blocks bioactive compounds.
Abstract Decomposing chemical interactions into bonds and other higher order is a common practice to analyse structures, gave birth many concepts, despite the fact that decomposition itself might be subjective in nature. Fragment molecular orbitals (FMOs) offer more rigorous alternative such intuition, but less interpretable due extensive delocalisation FMOs. Inspired by Principal Component Analysis statistics, we hereby present novel framework, Interacting Orbital (PIO) analysis, can very...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSolvothermal Synthesis of a Stable Coordination Polymer with Copper-I−Copper-II Dimer Units: [Cu4{1,4-C6H4(COO)2}3(4,4'-bipy)2]nSamuel M-F. Lo, Stephen S-Y. Chui, Lai-Yung Shek, Zhenyang Lin, Xi Xiang Zhang, Ge-hei Wen, and Ian D. WilliamsView Author Information Departments Chemistry Physics Hong Kong University Science Technology Clear Water Bay, Kowloon, Kong, China Cite this: J. Am. Chem. Soc. 2000, 122, 26, 6293–6294Publication Date...
In this paper, the trans influence of boryl ligands, together with that other ligands commonly believed to have a strong influence, has been investigated theoretically via density functional theory (DFT) calculations on series square-planar platinum(II) complexes form trans-[PtL(Cl)(PMe3)2]. The following order obtained: -BMe2>-SiMe3>-BH2>-SnMe3 approximately >-Bpin>> -Bcat -BCl2 -BBr2 -SiH3>-CH2CH3>-CH=CH2>-H -Me>-C6H5>-SiCl3>-SnCl3>-CCH. Natural bond analyses used understand how...
Abstract By attaching a bulky, inductively electron‐withdrawing trifluoromethyl (CF 3 ) group on the pyridyl ring of rigid 2‐[3‐ ( N ‐phenylcarbazolyl)]pyridine cyclometalated ligand, we successfully synthesized new heteroleptic orange‐emitting phosphorescent iridium(III) complex [Ir( L 1 2 (acac)] HL = 5‐trifluoromethyl‐2‐[3‐( ‐phenylcarbazolyl)]pyridine, Hacac acetylacetone) in good yield. The structural and electronic properties were examined by X‐ray crystallography time‐dependent DFT...
Abstract The synthesis, structures, photophysics, electrochemistry and electrophosphorescent properties of new red phosphorescent cyclometalated iridium(III) isoquinoline complexes, bearing 9‐arylcarbazolyl chromophores, are reported. functional these phosphors correlate well with the results density theory calculations. highest occupied molecular orbital levels complexes raised by integration a carbazole unit to iridium core so that hole‐transporting ability is improved in resulting...
DFT calculations have been carried out to study the insertion reactions of alkenes into Cu−B bond in (NHC)Cu(boryl) complexes (NHC = N-heterocyclic carbene). The nature and relevant regiochemistry examined along with β-hydride eliminations, which are followed by reinsertion alkene Cu−H bond. Hyperconjugation (i.e., π bonding) between Cu−C σ "empty" pz orbital on boron has identified as cause unexpectedly small Cu−C−B angle found experimentally X-ray diffraction α-borylalkyl Cu(I) complexes.
A new series of phosphorescent platinum(II) cyclometalated complexes with distinct electronic structures has been developed by simple tailoring the phenyl ring ppy (Hppy = 2-phenylpyridine) various main-group moieties in [Pt(ppy-X)(acac)] (X B(Mes)2, SiPh3, GePh3, NPh2, POPh2, OPh, SPh, SO2Ph substituted at para position). Their distinctive characters, resulting improved hole-injection/hole-transporting or electron-injection/electron-transporting features, have confined/consumed electrons...
The detailed reaction mechanism for the reduction of CO2 to CO catalyzed by (NHC)Cu(boryl) complexes (NHC = N-heterocyclic carbene) was studied with aid DFT calculating relevant intermediates and transition state structures. Our calculations show that occurs through insertion into Cu−B bond give a Cu−OC(O)−boryl species (i.e., containing Cu−O C−B bonds), subsequent boryl migration from C O, followed σ-bond metathesis between pinB−Bpin (B2pin2, pin pinacolate OCMe2CMe2O) (NHC)Cu(OBpin)....
The detailed mechanisms for the borylation of α,β-unsaturated carbonyl compounds, acrolein and methylacrylate, catalyzed by phosphine copper(I) boryl complexes were studied with aid density functional theory calculations. results show that occurs through C═C insertion into Cu−B to give a β-borylalkyl C-bound Cu(I) enolate intermediate. In acrolein, undergoes keto-to-enol isomerization an O-bound intermediate followed σ-bond metathesis diboron reagent. does not occur due inertness ester...
The synthesis and structural, photophysical, electrochemical, electroluminescent properties of a novel class trifunctional Pt(II) cyclometalated complexes are reported in which the hole-transporting triarylamine, electron-transporting oxadiazole, metal components integrated into single molecule. These neutral chelates display good thermal stability (>250 °C under N2) morphological stability. All them exhibit intense ligand-centered fluorescence phosphorescence fluid solutions at room...
Getting the green light: Highly efficient organic light-emitting diodes (OLEDs) have been synthesized from robust green-electrophosphorescent IrIII complexes based on carbazole derivatives (see picture, HT=hole transporting, EL=electroluminescence). The combination of short triplet lifetime, high emission efficiency, and improved charge-transporting properties allows these OLEDs to achieve peak efficiencies 12 % photons per electron 38 cd A−1.