可逆光异构化双分子层及结构转变的振动光谱

通过吸收,荧光,FT红外,示差扫描量热和X光研究了双链二苯乙烯两亲分子的聚集和光异构化,获得了固态和两个溶液相的双分子层厚度,振动光谱显示在反式二苯乙烯双层的固态和溶液相中存在反式排列的氢键,而在用365nm光照后的溶液相中氢键主要是顺式排列的。亚甲基链伸缩振动则表明烷基链非常有序的排列。

Reversible Photoisomerization Bilayer and Vibrational Spectra of Hydrogen Bonding Structure

Aggregation and isomerization of stilbene amphiphle containing double chain are investigated by absorption, fluorescent and FT IR spectra, as well as DSC and X ray diffraction. The solid state and two main phases in aqueous bilayers were obtained, which the bilayer thickness' are 2.03, 3.53 and 5.52 nm respectively. Vibrational spectra show that trans hydrogen bonding existed in solid state and aqueous bilayers for trans stilbene amphiphile while in contrary cis hydrogen bonding mainly existed in aqueous bilayer after irradiated with 365 nm light. The asymmetric and symmetric stretching of CH 2 in the bilayers are at near 2920 and 2850 cm -1 , indicating quite good order of the alkylchains.