A mild one-step radical-to-radical synthetic strategy has been developed to directly produce a new family of diarylamine-substituted tris(2,4,6-trichlorophenyl)methyl(TTM)radicals TTM-DPA,TTM-DBPA,and TTM-DFA.The obta...A mild one-step radical-to-radical synthetic strategy has been developed to directly produce a new family of diarylamine-substituted tris(2,4,6-trichlorophenyl)methyl(TTM)radicals TTM-DPA,TTM-DBPA,and TTM-DFA.The obtained TTM radical derivatives are extremely stable during chromatography purification and long-term storage in the solid state.展开更多
The effects of N-2-hydroxyethyl-N-methyl-p-toluidine (HMT) on MMA polymerization using organic peroxide as an initiator and on AN photoinduced polymerization have been investigated respectively. The kinetics of polyme...The effects of N-2-hydroxyethyl-N-methyl-p-toluidine (HMT) on MMA polymerization using organic peroxide as an initiator and on AN photoinduced polymerization have been investigated respectively. The kinetics of polymerization and the overall activation energy of polymerization were determined. Based on kinetics study and the end group analysis of the polymer obtained by UV spectrum method, the initiation mechanism is proposed.展开更多
The photocatalytic decomposition of methanol in the presence of vanadium dichloride and the transfer of hydrogen and methyl free radicals to the additives and dinitrogen were reported.
The atom transfer radical polymerization (ATRP) of methyl methacrylate using α.α dichlorotoluene or α.α.α-trichlorotoluene as the initiator and CuCl/2.2'-bipyridine complex as the catalyst was investigated. ...The atom transfer radical polymerization (ATRP) of methyl methacrylate using α.α dichlorotoluene or α.α.α-trichlorotoluene as the initiator and CuCl/2.2'-bipyridine complex as the catalyst was investigated. α,α-Dichlorotoluene gave good control of molecular weight with high initiation efficiency and low polydispersity. While α.α.α-trichlorotoluene gave very slow polymerization rate. which could be improved by the addition of Cu (0) to the system.展开更多
Chemistry in the ultracold regime enables fully quantum-controlled interactions between atoms and molecules,leading to the discovery of the hidden mechanisms in chemical reactions which are usually curtained by therma...Chemistry in the ultracold regime enables fully quantum-controlled interactions between atoms and molecules,leading to the discovery of the hidden mechanisms in chemical reactions which are usually curtained by thermal averaging in the high temperature.Recently a couple of diatomic molecules have been cooled to ultracold regime based on laser cooling techniques,but the chemistry associated with these simple molecules is highly limited.In comparison,free radicals play a major role in many important chemical reactions,but yet to be cooled to submillikelvin temperature.Here we propose a novel method of decelerating CH_(3),the simplest polyatomic free radical,with lithium atoms simultaneously by travelling wave magnetic decelerator.This scheme paves the way towards co-trapping CH_(3)and lithium,so that sympathetical cooling can be used to preparing ultracold free radical sample.展开更多
基金supported by the National Key Research and Development Program of China(nos.2018YFA0703200 and 2018YFA0209401)the National Natural Science Foundation of China(nos.61890940,52073063,51903052,and 21733003)+1 种基金the Shanghai Pujiang Project(no.19PJ1400700),the Natural Science Foundation of Shanghai(no.21ZR1409600)the Program for Professor of Special Appointment(Eastern Scholar)at the Shanghai Institutions of Higher Learning.
文摘A mild one-step radical-to-radical synthetic strategy has been developed to directly produce a new family of diarylamine-substituted tris(2,4,6-trichlorophenyl)methyl(TTM)radicals TTM-DPA,TTM-DBPA,and TTM-DFA.The obtained TTM radical derivatives are extremely stable during chromatography purification and long-term storage in the solid state.
基金The project supported by the National Natural Science Foundation of China
文摘The effects of N-2-hydroxyethyl-N-methyl-p-toluidine (HMT) on MMA polymerization using organic peroxide as an initiator and on AN photoinduced polymerization have been investigated respectively. The kinetics of polymerization and the overall activation energy of polymerization were determined. Based on kinetics study and the end group analysis of the polymer obtained by UV spectrum method, the initiation mechanism is proposed.
文摘The photocatalytic decomposition of methanol in the presence of vanadium dichloride and the transfer of hydrogen and methyl free radicals to the additives and dinitrogen were reported.
文摘The atom transfer radical polymerization (ATRP) of methyl methacrylate using α.α dichlorotoluene or α.α.α-trichlorotoluene as the initiator and CuCl/2.2'-bipyridine complex as the catalyst was investigated. α,α-Dichlorotoluene gave good control of molecular weight with high initiation efficiency and low polydispersity. While α.α.α-trichlorotoluene gave very slow polymerization rate. which could be improved by the addition of Cu (0) to the system.
基金support from the National Natural Science Foundation of China(NSFC)under Grant No.11974434the Fundamental Research Funds for the Central Universities of Education of China under Grant No.191gpy276+2 种基金the Natural Science Foundation of Guangdong Province under Grant No.2020A1515011159Le Luo received supports from NSFC under Grant No.11774436,Guangdong Province Youth Talent Program under Grant No.2017GC010656Sun Yat-sen University Core Technology Development Fund,and the Key-Area Research and Development Program of GuangDong Province under Grant No.2019B030330001.
文摘Chemistry in the ultracold regime enables fully quantum-controlled interactions between atoms and molecules,leading to the discovery of the hidden mechanisms in chemical reactions which are usually curtained by thermal averaging in the high temperature.Recently a couple of diatomic molecules have been cooled to ultracold regime based on laser cooling techniques,but the chemistry associated with these simple molecules is highly limited.In comparison,free radicals play a major role in many important chemical reactions,but yet to be cooled to submillikelvin temperature.Here we propose a novel method of decelerating CH_(3),the simplest polyatomic free radical,with lithium atoms simultaneously by travelling wave magnetic decelerator.This scheme paves the way towards co-trapping CH_(3)and lithium,so that sympathetical cooling can be used to preparing ultracold free radical sample.