SUBSTITUENT

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A silylene-stabilized distannavinylidene with a highly labile substituent
《Science China Chemistry》2023年第12期3555-3561,共7页Zihao Qiao Ming Chen Zhenbo Mo 
supported by the National Natural Science Foundation of China(22071124,22371130,22221002);the Frontiers Science Center for New Organic Matter at Nankai University(C029215001);the Fundamental Research Funds for the Central Universities(63206007);the Nankai University and Young Elite Scientists Sponsorship Program by Tianjin。
Vinylidene and its heavier analogues are fundamentally important in synthetic chemistry,but their stabilization and structural characterization remains extremely challenging.Herein we describe that the reduction of an...
关键词：distannavinylidene SILYLENES stannacycles distannyne CARBORANES 
Substituent engineering in g-C_(3)N_(4)/COF heterojunctions for rapid charge separation and high photo-redox activity被引量：5
《Science China Chemistry》2022年第9期1704-1709,共6页Jiayun Guo Dongge Ma Fulin Sun Guilin Zhuang Qi Wang Abdullah M.Al-Enizi Ayman Nafady Shengqian Ma 
supported by the National Natural Science Foundation of China(21876154);the Fundamental Research Funds for the Provincial Universities of Zhejiang(JRK22001);Partially support from the Robert A.Welch Foundation(B-0027)(SM);the Researchers Supporting Program(RSP-2022/55)at King Saud University,Riyadh,Saudi Arabia(AMA)。
The heterojunction composed of covalent organic frameworks(COFs)with adjustable structure and other photocatalysts has great potential in the field of photocatalysis.However,effectively enhancing the photocatalytic pe...
关键词：MONOFLUOROPHOSPHATE g-C_(3)N_(4) heterojunction photocatalysis substituent electronegativity 
Rational design of systematic AIEEgens further modified by substituents from a novel chain structure
《Science China Chemistry》2021年第1期52-60,共9页Hao Lu Kun Wang Beibei Liu Meng Wang Mingming Huang Yue Zhang Jiping Yang 
the National Natural Science Foundation of China(21574003)。
The expansion of new structures in aggregation-induced emission/aggregation-induced emission enhancement(AIE/AIEE)systems has attracted persistent attention recently,from which more luminescent functional molecules wi...
关键词：aggregation-induced emission enhancement chain structure enamine derivatives substituent tunable emission 
Effects of substituent and solvent on the UV absorption energy of 4,4'-disubstituted stilbenes被引量：6
《Science China Chemistry》2011年第11期1735-1744,共10页CAO ChenZhong CHEN GuanFan WU YaXin 
financially supported by the National Natural Science Foundation of China (21072053 & 20772028) ;the Scientific Research Fund of Hunan Provincial Education Department (10K025)
Twenty five samples of 4,4'-disubstituted stilbene derivatives were synthesized, and their UV absorption max wavelengths were determined in over 10 kinds of solvents including cyclohexane, ether, chloroform, acetonitr...
关键词：4 4'-disubstituted stilbene UV absorption energy excited-state substituent parameter solvent effect 
Structures and properties of novel 5,15-di[4-(5-acetylsulfanylpentyloxy)phenyl] porphyrin derivatives:Density functional theory calculations被引量：2
《Science China Chemistry》2010年第10期2183-2192,共10页ZHU YiFei1,2, QI DongDong1, ZHANG LiJuan1, WAN Liang1, ZHANG YueXing1 & JIANG JianZhuang1 1Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China 2Department of Chemistry, Hebei North University, Zhangjiakou 075000, China 
supported by the Na-tional Natural Science Foundation of China (20931001);Beijing Municipal Commission of Education,and China Postdoctoral Science Foundation (20090460210)
Density functional theory (DFT) calculations have been carried out in order to compare the molecular structures, atomic charges, molecular orbitals, electronic absorption spectra, and infrared (IR) spectra of the meta...
关键词：PORPHYRIN SUBSTITUENT effect electronic ABSORPTION SPECTRA IR SPECTRA density functional theory (DFT) 
Electron structure and substituent effects in o-,m-,p-IC_6H_4OCH_3 iodoanisoles
《Science China Chemistry》2009年第11期1932-1937,共6页TONG ShengRui,WANG WeiGang,MA ChunPing,GE MaoFa & WANG DianXun Beijing National Laboratory for Molecular Sciences(BNLMS),State Key Laboratory for Structural Chemistry of Unstable and Stable Species,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China 
Supported by the National Natural Science Foundation of China (Grant No. 20673123)
The electronic structures and substituent effects in o-,m-,and p-iodoanisoles have been investigated by ultraviolet photoelectron spectroscopy(UPS).The observed UPS bands were analyzed by combining empirical arguments...
关键词：ELECTRONIC structures SUBSTITUENT effects ULTRAVIOLET PHOTOELECTRON SPECTROSCOPY REACTIVITY 
Theoretical studies on the spectroscopic properties and the substituent effects of pyridyl triazole Os(Ⅱ) complexes
《Science China Chemistry》2009年第3期261-265,共5页WU YuHui, ZHOU Xin & ZHANG HongXing State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China 
To explore the spectroscopic properties of pyridyl triazole Os(Ⅱ) complexes and how the substituent effects affect the spectroscopic properties of [Os(ptz)2L2] (L=PH3; ptzH=(2-pyridyl)-1,2,4-triazole) (1), [Os(bptz)2...
关键词：PYRIDYL TRIAZOLE Os(Ⅱ) COMPLEXES excited state density functional theory TD-DFT SUBSTITUENT effects 
Thermodynamic stabilities of carbon-and nitrogen-centered radicals被引量：1
《Science China Chemistry》1995年第12期1417-1424,共8页程津培 赵永昱 还振威 
<正> The gas-phase homolytic C-H and N-H bond dissociation energies(BDE)of the substi-tuted phenoacetonitrile families,aromatic amines,and semicarbazone derivatives were systematically investigatedor reinvestigated ba...
关键词：homolytic bond DISSOCIATION energy RADICAL stability SUBSTITUENT effect. 
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