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国家自然科学基金(20872167)

作品数:5 被引量:3H指数:1
相关作者:黎占亭赵新王璐徐晓娜更多>>
相关机构:中国科学院复旦大学更多>>
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Complexation of two non-fully hydrogen bonded aromatic hydrazide heptamers toward n-octyl-α-L-glucopyranoside in chloroform
2009年
Two aromatic hydrazide haptamers have been prepared,with both consisting of two hydrogen bonded folded segments. Compared to their fully hydrogen bonded analogues,the flexibility of their backbones increases due to lack of one or two intramolecular hydrogen bonds at the middle aromatic unit. (2D) 1H NMR,circular dichroism and fluorescent studies revealed that both oligomers moderately complex n-octyl-α-L-glucopyranoside in chloroform.
DU PingXU YunXiangJIANG XiKuiLI ZhanTing
关键词:FOLDAMERHYDRAZIDESACCHARIDE
两个手性胶囊分子的氢键介质的动态共价键合成(英文)
2011年
由手性环己-1,2-二胺衍生的手性双头基前体合成了2个手性的双层结构的胶囊化合物.设计前体带有氨基和醛基,它们被连接到2个分子内氢键诱导的折叠体片段上.分子内氢键通过促进6个亚胺键的形成导致2个大环板块的选择性.
徐晓娜王璐赵新黎占亭
关键词:氢键
氢键介质的芳酰胺折叠体:从构象控制到功能演化(英文)被引量:2
2011年
根据芳环上酰胺和氢键受体位置的不同,氢键介质的芳酰胺和酰肼折叠体可以产生折叠、螺旋、"之"字型、直线型及其他扩展型的构象。由于氢键具有较高的稳定性及芳酰胺固有的平面性特征,这一系列的芳酰胺寡聚体拥有较高的可预测的构象。芳酰胺骨架本身可以通过简单的酰胺键偶合反应构筑,而不同的官能团也可以选择性地引入到特定的骨架内部或其侧链内。因此,在过去几年内,我们重点研究了它们在构筑新的分子镊,形成凝胶、囊泡和液晶等有序功能超分子体系及促进大环分子体系合成方面的应用。近期我们又发现,氢键驱动的折叠片段能够并入到聚合物中,通过分子内氢键的断裂和恢复可逆调控聚合物的力学性质。本文主要介绍我们实验室在氢键驱动的芳酰胺折叠体结构–性质关系研究方面取得的进展。
黎占亭
关键词:氢键超分子化学寡聚体大分子
芳香化合物分子内弱氢键模式及其对分子折叠构象的控制
<正>氢键作为一种主要的非共价键力在生命科学、超分子化学、分子识别与自组装、晶体工程及材料科学研究中主要重要地位。芳香酰胺可以形成较强的分子间N-H…O=C氢键。当酰胺基团的邻位带有氢键受体时,这类分子可以形成分子内氢键...
黎占亭
关键词:氢键芳香酰胺三氮唑分子构象
Hydrogen bonded foldamer-bridged biscoumarins:A UV-Vis absorption and fluorescent study of the solvent effect
2010年
Three arylamide-bridged biscoumarin derivatives 1-3 have been designed and prepared. Compounds 1 and 2 are induced by the intramolecular N?H…O and N·H…F hydrogen bonding to possess a helical conformation,and 3 is induced to have an extended conformation. A comparison of their absorption and fluorescent spectra in a variety of solvents of a wide range of polarity with those of control compound 4 reveals that,for foldamers 1 and 2,the intramolecular hydrogen bonding and the helical conformations exist in most solvents,but do not exist or are very weak in DMF and DMSO.
LU ZhengQuanZHU YuanYuanLIN JianBinJIANG XiKuiLI ZhanTing
关键词:紫外可见吸收光谱分子内氢键DMSO
Hydrogen Bonded Supramolecular Polymers in Both Apolar and Aqueous Media: Self-Assembly and Reversible Conversion of Vesicles and Gels被引量:1
2011年
In a preliminary letter (Tetrahedron Lett. 2010, 51, 188), we reported two new hydrazide-based quadruple hydrogen-bonding motifs, this is, two monopodal (la and lb) and five dipodal (2a, 2b and 3a--3c) aromatic hydrazide derivatives, and the formation of supramolecular polymers and vesicles from the dipodal motifs in hydrocarbons. In this paper, we present a full picture on the properties of these hydrogen-bonding motifs with an emphasis on their self-assembling behaviors in aqueous media. SEM, AFM, TEM and fluorescent micrographs indicate that all the dipodal compounds also form vesicles in polar methanol and water-methanol (up to 50% of water) mixtures. Control experiments show that lb does not form vesicles in same media. Addition of lb to the solution of the dipodal compounds inhibits the latter's capacity of forming vesicles. At high concentrations, 3b and 3c also gelate discrete solvents, including hydrocarbons, esters, methanol, and methanol-water mixture. Concentration-dependent SEM investigations reveal that the vesicles of 3b and 3c fuse to form gels and the gel of 3c can de-aggregate to form the vesicles reversibly.
杜平孔军王贵涛赵新李光玉蒋锡夔黎占亭
关键词:VESICLEORGANOGELSELF-ASSEMBLY
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