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1. Hydrogen Bonded Supramolecular Liquid Crystalline Complex of 2,4,6-Triarylamino-1,3,5-triazines with Semiperfluorinated Benzoic Acids | |||
Su Fawu,Cheng Xiaohong | |||
Chemistry 18 March 2010 | |||
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Abstract:Hydrogen bonded supramolecular complexes of 2, 4, 6-triarylamino-1, 3, 5-triazines (Tn) with semiperfluorinated benzoic acids have been prepared in this paper. The mesophase behaviors of such complexes were investigated with POM, DSC and X-ray diffraction. Columnar mesophase was found in the equimolar mixtures of the triazines with the semiperfluorinated benzoic acids. While the equimolar mixture of triazines with the nonfluorinated three fold alkoxy-modified carboxylic acid was not mesogen. The mesophase formation is analyzed as the hydrogen bonding between the Tn and benzoic acid lead to discrete dimeric supermolecule and enhance the polarity of the core region of the dimeric supermolecule; simultaneously, an increased intramolecular polarity contrast upon replacing alkyl chains by semiperfluorinated chains, which favors a microsegregation, lead to the fromation of the columnar phase. | |||
TO cite this article:Su Fawu,Cheng Xiaohong. Hydrogen Bonded Supramolecular Liquid Crystalline Complex of 2,4,6-Triarylamino-1,3,5-triazines with Semiperfluorinated Benzoic Acids [OL].[18 March 2010] http://en.paper.edu.cn/en_releasepaper/content/40838 |
2. A New Fluorescent Chemsensor Based on Metal-macrocycle Complex for Biological anion in Aqueous Solution | |||
Xiaohuan Huang,Lv Yan,Yongbing He,Chen Zhihong | |||
Chemistry 28 January 2010 | |||
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Abstract:We have synthesized the tetraazamacrocycle 1 bearing two anthryl groups as side-arms, which exhibited high selectivity for ZnII ion in switching-on type responses in aqueous solution. 1-ZnII shows obvious excimer emission by coordination with ZnII in aqueous solution. When PPi or ATP was added (pH 7.4), the excimer emission of 1-ZnII was quenched while the monomer emission was revived. To our knowledge, no other known sensor has this characteristic under physiological pH conditions. At the same time, the obvious different fluorescence response of 1-ZnII for PPi and ATP in water show that the receptor 1-ZnII can be used as a selectivity fluorescent chemosensor for PPi and ATP anions. | |||
TO cite this article:Xiaohuan Huang,Lv Yan,Yongbing He, et al. A New Fluorescent Chemsensor Based on Metal-macrocycle Complex for Biological anion in Aqueous Solution[OL].[28 January 2010] http://en.paper.edu.cn/en_releasepaper/content/39627 |
3. A Novel Self-Promoted Morita-Baylis-Hillman-Like Dimerization | |||
Qiang Li,Kittyya Wongkhan,Xiancai Luo,Andrei S. Batsanov,Judith A. K. Howard,Yu Lan,Yundong Wu,Todd B. Marder,Aiwen Lei | |||
Chemistry 25 January 2010 | |||
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Abstract:While stable in CH2Cl2, hexane or THF, in the presence of MeOH, self-promoted dimerization of the tri-arylphosphine-alkene 1, a ligand for Pd-catalyzed reactions, produced an unusual racemic bis(phosphine) 2 in high yield. Reaction of 2 with Pd(dba)2, followed by oxidative addition of p-IC6H4NO2, yields a trans-chelated Pd(II) aryl iodide complex. | |||
TO cite this article:Qiang Li,Kittyya Wongkhan,Xiancai Luo, et al. A Novel Self-Promoted Morita-Baylis-Hillman-Like Dimerization[J]. |
4. Controllable Enzymatic anti-Markovnikov, Markovnikov Addition and Acylation of Thiols to Vinyl Esters in Organic Media | |||
Wu Qi ,Lin Xianfu | |||
Chemistry 11 January 2010 | |||
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Abstract:A novel enzymatic promiscuous protocol for the reaction of thiols to vinyl esters has been described. The acylation is efficiently catalyzed by commercially available D-amino acylase from Escherichia coli (DA) in DMF, affording the thiolesters in good yields. Moreover, the regioselectivity of the Markovnikov and anti-Markovnikov reaction can be controlled by the choice of organic media under the catalysis of Candida antarctica lipase B (CAL-B) so that both the anti-Markovnikov (DMF) and the Markovnikov products (Isopropylether) are now easily accessible in excellent selectivities. | |||
TO cite this article:Wu Qi ,Lin Xianfu . Controllable Enzymatic anti-Markovnikov, Markovnikov Addition and Acylation of Thiols to Vinyl Esters in Organic Media[OL].[11 January 2010] http://en.paper.edu.cn/en_releasepaper/content/38725 |
5. β cyclodextrin-induced Fluorescence Enhancement of a Thermal- Responsive Azobenzene Modified Polydiacetylene Vesicles for a Temperature Sensor | |||
Chen Xin,Jiang Hao,Wang Yali,Zou Gang,Zhang Qijin | |||
Chemistry 07 August 2009 | |||
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Abstract:Herein, azobenzene modified polydiacetylene (PDA) vesicles with linear temperature dependence of fluorescence intensity had been fabricated successfully, and photo-controlled inclusion and exclusion reaction with β-cyclodextrin were used to act as driving force to induce fluorescence change of above azobenzene substituted PDA based vesicles. | |||
TO cite this article:Chen Xin,Jiang Hao,Wang Yali, et al. β cyclodextrin-induced Fluorescence Enhancement of a Thermal- Responsive Azobenzene Modified Polydiacetylene Vesicles for a Temperature Sensor[OL].[ 7 August 2009] http://en.paper.edu.cn/en_releasepaper/content/34346 |
6. A New Cryptand/Paraquat [2]Pseudorotaxane | |||
Shijun Li,Feihe Huang,Lev N. Zakharov,Carla Slebodnick,Arnold L. Rheingold,Harry W. Gibson | |||
Chemistry 20 July 2009 | |||
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Abstract:A new cryptand/paraquat [2]pseudorotaxane and its crown ether analog were synthesized and charac-terized by proton NMR, mass spectrometry, and single crystal X-ray analysis. The Job plots based on proton NMR data demonstrated that both the complex between cryptand 1 and paraquat derivative 2a and the complex between bis(p-phenylene)-34-crown-10 (3) and paraquat derivative 2b have 1:1 stoichiometry in solution. The apparent association constants (Ka,exp) of 1•2a and 3•2b calculated for 1:1 complexes were 1.4 ( 0.2)  104 and 4.7 ( 0.5)  102 M1, respectively. X-ray analysis showed that 1•2a is stabilized by ten hydrogen bonds and face-to-face -stacking interactions in the solid state, while 3•2b is stabilized by four hydrogen bonds and face-to-face -stacking interactions. As well as in the X-ray structure of 1•2c, a water molecule acts as a hydrogen bridge between the -protons of 2a and the ether oxygen atoms of 1 in 1•2a. The successful preparation of 1•2a demonstrated that the tert-butyl group is not big enough to be a stopper for rotaxanes based on 1. | |||
TO cite this article:Shijun Li,Feihe Huang,Lev N. Zakharov, et al. A New Cryptand/Paraquat [2]Pseudorotaxane[OL].[20 July 2009] http://en.paper.edu.cn/en_releasepaper/content/33935 |
7. Synthesis and electron-donating property of novel porphyrazines containing tetrathiacrown ether-linked tetrathiafulvalene moieties | |||
Hou Ruibin ,Jin Longyi,Yin Bingzhu | |||
Chemistry 16 June 2009 | |||
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Abstract:Novel magnesium and metal-free porphyrazines (4 and 5) containing four peripheral tetrathiacrownether-linked tetrathiafulvalene moieties have been synthesized and characterized. Their solution electrochemical data showed two reductive and three oxidative processes within a −1500 mV to +1500 mV potential window. UV/Vis spectroscopy and electron paramagnetic resonance(EPR) measurements reveal the formation of a charge transfer complex between porphyrazine 4 with F4TCNQ. The single-crystal structure of the TTF-dicyanocrown ether 3 is presented. | |||
TO cite this article:Hou Ruibin ,Jin Longyi,Yin Bingzhu . Synthesis and electron-donating property of novel porphyrazines containing tetrathiacrown ether-linked tetrathiafulvalene moieties[OL].[16 June 2009] http://en.paper.edu.cn/en_releasepaper/content/33170 |
8. Synthesis, photophysical and electrochemical properties of a D-π-A ensemble derived from porphyrazine and tetrathiafulvalene | |||
Ruibin Hou,Han Qiu,Tie Chen,Bingzhu Yin | |||
Chemistry 10 June 2009 | |||
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Abstract:Cis/trans 1,2-dicyanoethylenes bearing tetrathiafulvalene units linked by ethylenedithio spacer were prepared. The cis isomer was converted to eight tetrathiafulvalene unit substituted magnesium porphyrazine upon a metal-templated cyclotetramerization with magnesium propoxide in propanol. The dicyanoethylenes and target compound were characterized by EA, NMR, and MALDI-TOF mass and photophysical and Electrochemical propeties were discussed. | |||
TO cite this article:Ruibin Hou,Han Qiu,Tie Chen, et al. Synthesis, photophysical and electrochemical properties of a D-π-A ensemble derived from porphyrazine and tetrathiafulvalene[OL].[10 June 2009] http://en.paper.edu.cn/en_releasepaper/content/33006 |
9. Multisensing Anion Recognition with thioure based Receptor functionalized with tetrathiafulvalene Unit | |||
Su Chang,Gu Liying,Yin Bingzhu | |||
Chemistry 17 December 2008 | |||
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Abstract:A series thiourea/urea-based anion receptors functionalized with tetrathiafulvalene (1-4) were prepared. Among them, 4 displays the high sensitive multisensing for acetate anion over various anions in acetonitrile with dramatic changes in UV-vis spectra , cyclic voltammogram and 1H NMR spectra. Conformation change induced by anion complexing of 4 caused the improvement of ICT channel to enhance the charge transfer not noly from thiourea moiety but also from TTF unit to electron-defect benzene ring. TTF unit plays a synergic charge transfer role for trifluoromethyl group in the ICT process. DFT calculation supported the hypothesis of conformational change and ICT channel improvement. | |||
TO cite this article:Su Chang,Gu Liying,Yin Bingzhu. Multisensing Anion Recognition with thioure based Receptor functionalized with tetrathiafulvalene Unit[OL].[17 December 2008] http://en.paper.edu.cn/en_releasepaper/content/26675 |
10. Copper-Catalyzed Highly Efficient Multicomponent Reactions:Synthesis of quinolin-2(1H)-imine | |||
She Debing,Yang Mingyu,Hui Haohao,Zhao Qin,Chen Min,Huang Guosheng | |||
Chemistry 06 May 2008 | |||
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Abstract:A variety of substituted quinolin-2(1H)-imine are prepared via a copper-catalyzed multicomponenet reaction of sulfonyl azides, terminal alkynes, and o-aminobenzaldehyde. First sulfonyl azides, alkynes under the copper catalysis condition build the intermediate, then o-aminobenzaldehyde dehydrogenation under Et3N condition and attact the intermediate to form the quinolin-2(1H)-imine. | |||
TO cite this article:She Debing,Yang Mingyu,Hui Haohao, et al. Copper-Catalyzed Highly Efficient Multicomponent Reactions:Synthesis of quinolin-2(1H)-imine[OL].[ 6 May 2008] http://en.paper.edu.cn/en_releasepaper/content/21174 |
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