|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Crystalline behaviors and phase transition during the manufacture of fine denier PA6 fibers显示文摘Recently we have successfully produced fine denier PA6 fibers by using additives containing lanthanide compounds.Meanwhile,crystallization and phase transition of PA6 fibers during spinning and drawing processes were investigated.During the spinning process,β phase crystal could be obtained in as-spun PA6 fibers which were produced with relatively high melt draw ratio,while γ phase crystal predominated when the melt draw ratio was relatively low.β phase crystal,whose behaviors are similar with those of γ phase by FT-IR and XRD characterization,could be transformed to α form easily when PA6 fibers are immersed in boiling water.However,γ phase crystal of PA6 remains unchanged in boiling water.Thus,β and γ phase crystals of PA6 can be differentiated by the crystalline behaviors of PA6 fibers after treatment in boiling water.Further experiments demonstrate that the β phase can also be produced during a drawing process where a phase transformation from γ to α occurs.In other words,β phase may act as an intermediate state during the phase transformation. | ZHANG ChengFeng LIU YuHai LIU ShaoXuan LI HuiZhen HUANG Kun PAN QingHua HUA XiaoHui HAO ChaoWei MA QingFang LV ChangYou LI WeiHong YANG ZhanLan ZHAO Ying WANG DuJin LAI GuoQiao JIANG JianXiong XU YiZhuang WU JinGuang | 2009 | Science China Chemistry2009，52，11： | 4 |
| 2 | Fast elimination of malaria by infectious source eradication with artemisinin-based compound显示文摘Malaria is one of the three most hazardous infectious diseases(HIV/AIDS,Malaria and tuberculosis)in the world.Since 1960,falciparum malaria gradually became resistant to original antimalarial drugs such as Chloroquine and Fansidar.With the global spread of drug-resistant falciparum malaria,morbidity and mortality increased greatly.In | Liling Feng Xiaoli Luo Yaofang Zhou Xingbo Guo Guoqiao Li | 2016 | Science China(Life Sciences)2016，59，1： | 2 |
| 3 | Ionic liquid functionalized silica gel:novel catalyst and fixed solvent显示文摘 | Guoqiao Lai Jiajian Peng Jiayun Li | 2006 | Tetrahedron Letters2006，47，39： | 1 |
| 4 | Ionic liquid functionalized silica gel: novel catalyst and fixed solvent 显示文摘 | Lai Guoqiao Peng Jiajian Li Jiayun | 2006 | Tetrahedron Letters2006，47，： | 1 |
| 5 | Ionic liquid functionalized silica gel:Novel catalyst and fixed solvent显示文摘 | Lai Guoqiao Peng Jiajian Li Jiayun | 2006 | Tetrahedron Letters2006，47，39： | 1 |
| 6 | Synthesis, spectroscopic, and electrochemical properties of two dyads consisted of tetrathiafulvalene and carbazole显示文摘Two donor-σ-acceptor molecules containing tetrathiafulvalene(TTF)and carbazole moieties were synthesized bythe reactionof 9-(4-bromo-butyl)-carbazole(1)with 2,6-bis(hexylthio)-3-(2-cyanoethylthio)-7-(methylthio)-tetrathiafulvalene(2)or2,6-bis(2-cyanoethylthio)-3,7-bis(methylthio)tetrathiafulvalene(3)in the presence of CsOH·H_(2)O,respectively.The structures of the molecules were characterized by 1 H NMR,13 C NMR,MS,and elemental analyses.They showed negligible intramolecu-lar charge-transfer interaction in their ground states as indicated by their UV-Vis spectroscopics and cyclic voltammetry results.Compared with carbazole,their fluorescence was strongly quenched,which implied that a photo induced electron transfer(PET)interaction between TTF and carbazole moieties occurred. | Guoqiao LAI Yibo LIU Meijiang LI Yongjia SHEN | 2009 | Frontiers of Chemical Science and Engineering2009，3，2： | 0 |
| 7 | Synthesis and properties of tetrathiafulvalene-fluorescein dyads显示文摘Two donor-acceptor molecular systems con-sisted of tetrathiafulvalene(TTF)and fluorescein were designed and synthesized.The target compounds and their key intermediates were characterized by 1H NMR,mass spectrography,and infrared spectroscopy,respectively.The UV-vis spectra implied intramolecular interaction in their ground state.Fluorescence spectra and fluorescence lifetimes indicated the photoinduced charge transfer(PET)interaction between the TTF and fluorescein units in their excited states. | Guoqiao LAI Yibo LIU Yu ZHANG Jun RUAN Meijiang LI Yongjia SHEN | 2009 | Frontiers of Chemical Science and Engineering2009，3，3： | 0 |
| 8 | Siloles and Acetenyl Aromatics Copolymers: Synthesis, Characterization and Photophysical Properties显示文摘Two copolymers,poly(1,1-dimethyl-3,4-diphenylsilole-alt-N-hexyl-3,6-diethynylcarbazole)(PS-DyCz)and poly-(1,1-dimethyl-3,4-diphenylsilole-alt-2,7-diethynyl-9,9'-dihexylfluorene)(PS-DyF),were synthesized by Sonogashira coupling reaction of 2,5-dibromo-1,1-dimethyl-3,4-diphenylsilole and N-hexyl-3,6-diethynylcarbazole or 2,7-diethynyl-9,9'-dihexylfluorene,respectively.The chemical structures of the copolymers were characterized by NMR,FT-IR techniques.Their thermal and photophysical properties were evaluated by TGA,DSC,UV-Vis and fluorescence spectroscopy,respectively.The weight-averaged molecular weights(Mw)of PS-DyCz and PS-DyF are 1.20×10^(4) and 3.83×10^(4) Da,respectively.The degree of polymerization is 8 and 22 units.Theseπ-conjugated polymers exhibited lower band-gap of 2.25 and 2.70 eV due to the presence of silole rings and C≡C triple bonds in their backbone,the results were consistent with the density functional(DFT)calculations at the B3LYP/6-31G^(*)level. | Zhenhua He Guoqiao Lai Zhifang Li Xiao Yuan Yongjia Shen Chengyun Wang | 2015 | Chinese Journal of Chemistry2015，33，5： | 0 |
| 9 | A Benzodithiophene-Based Fluorescence Probe for Rapid Detection of Fluoride Ion显示文摘A novel and simple fluorescence probe was synthesized from benzo[l,2-b:4,5-b']dithiophene (BDT) and trime-thylsilylethyne via Sonogashira reaction, and showed highly selective and sensitive fluorescence decreasing re-sponse towards F . The probe molecule turned to a weakly fluorescent terminal alkyne moiety because its trime-thylsilyl (TMS) group was cleaved by fluoride, which was proved by IH NMR titration. Whereas no distinct fluo-rescent changes were observed with the addition of other anions, such as C1^-, B^_r, I^-, AcO^- and HzPO4 . Upon theaddition of F-, the maximum fluorescence emission wavelength shifted from 460 nm to 450 nm with a decrease offluorescence intensity by 40% within 20 s. Moreover, the detection limit towards F- was calculated to be as low as73.5 nmol/L. | Wenbin Tan Taohua Leng Guoqiao Lai Zhifang Li JiefeiWu Yongjia Shen Chengyun Wang | 2016 | Chinese Journal of Chemistry2016，34，8： | 0 |
| 10 | Synthesis and properties of tetrathiafulvalene-porphyrin assemblies显示文摘Two donor-σ-acceptor molecular systems incorporating tetrathiafulvalene(TTF)and tetraphenylpor-phyrin(TPP)units,TTF-TPP(dyad 1)and TTF-TPP-TTF(triad 2),were synthesized.Both dyad 1 and triad 2 and their synthetic intermediates have been characterized by 1H nuclear magnetic resonance(1H NMR)and mass spectro-graphy(MS).Their ultraviolet and visible spectroscopy(UV-Vis)and cyclic voltammetry(CV)showed negligible intramolecular charge transfer interaction in their ground states.Theirfluorescence intensity was strongly quenched compared with TPP,which implied the photoinduced electron transfer occurred from the TTF unit to the TPP unit in the excited state.On the other hand,theirfluorescence intensity could be modulated by sequential oxidation of the TTF unit using chemical methods,which exhibited their potential application influorescence molecular switch. | Meijiang LI Rui HUANG Changzhi WU Hujin ZUO Guoqiao LAI Yongjia SHEN | 2011 | Frontiers of Chemical Science and Engineering2011，5，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员