排序方式: 共有6条查询结果,搜索用时 15 毫秒
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Gurjaspreet Singh Satinderpal Singh Mangat Jandeep Singh Aanchal Arora Ramesh K. Sharma 《Tetrahedron letters》2014
The copper-catalyzed ‘click silylation’ has been exploited for the chemical modification of γ-azidopropyltriethoxysilane (AzPTES) with a wide range of terminal alkynes (1a–1v) in a one-pot operation. The novel 1,2,3-triazole-triethoxysilane derivatives (2a–2v) were synthesized by this procedure and comprehensively characterized by IR spectra, 1H and 13C NMR, and HRMS studies. 相似文献
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A series of substituted aniline derivatized bis(1,2,3-triazolyl-γ-propylsilatranes) 3a–3f were designed in good yield from their triethoxysilane analogues via Cu(I) ‘Click Silylation’. All the silatranes 3a–3f were characterized by IR, NMR (1H, 13C) and HRMS studies. All these compounds were explored for their thermal stability by thermogravimetric analysis (TGA)/differential thermal analysis (DTA)/differential scanning calorimetry (DSC) study and electronic properties by UV–vis spectroscopy and fluorescence study. The binding of silatranes 3a–3f to Cu2+ ion proves them to be good chemosensor. These silatranes were subjected to time dependent hydrolysis under normal atmospheric conditions. IR spectroscopic data support hydrolytic instability of 3a, 3c and 3e. 相似文献
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A detailed investigation of the electro-optical switching parameters of an antiferroelectric liquid crystal (S)-(+)-4-(1-methylheptyloxycarbonyl) phenyl 4′-(6-octanoyloxyhex-1-oxy) biphenyl-4-carboxylate (abbreviated as S-7H6Bi) has been carried out. S-7H6Bi has paraelectric (SmA?) and ferroelectric (SmC?) phases in addition to antiferroelectric (SmC?A) phase. Switching parameters viz. spontaneous polarization and switching time were determined by polarization reversal method. The spontaneous polarization (Ps) is found to be highly temperature dependent and decreases with temperature. The maximum value of Ps is found to be ∼90 nC/cm2 whereas the switching time (ts) is found to be of the order 1-2 ms. The temperature dependent torsional viscosity (γt) is of the order 10 Pa sec. It increases with decrease in temperature. 相似文献
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Patra Pratim Kumar Jaisingh Aanchal Goel Vishal Kapur Gurpreet Singh Nebhani Leena 《Journal of Thermal Analysis and Calorimetry》2022,147(12):6689-6699
Journal of Thermal Analysis and Calorimetry - In this paper, isothermal and non-isothermal crystallization behaviour of neat polypropylene (PP), blends of PP/maleic anhydride grafted polypropylene... 相似文献
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