据报道,供体-受体苯乙烯吡啶鎓衍生物吸收可见光,发生分子间[2+2]环加成,在晶体中形成环丁烷结构,在紧张的化学键中储存高达42 kJ/mol的能量,半衰期长达32年。通过紫外线照射或热激活触发回复以释放能量,并且固态能量存储-释放过程重复超过10个循环而不分解。通过改变供体部分和反阴离子上的官能团,我们微调了晶体中的 3D 堆积以及阳离子分子和阴离子之间的静电相互作用,这主要决定了化合物的能量存储能力。这项对苯乙烯吡啶鎓储能能力的定量和机理研究,在深入的晶体结构分析以及光学和热性能测量的支持下,将为新型分子太阳能热能存储材料的开发提供线索,这些材料具有超越常规的高度期望的性能。传统的光电开关。
据报道,供体-受体苯乙烯吡啶鎓衍生物吸收可见光,发生分子间[2+2]环加成,在晶体中形成环丁烷结构,在紧张的化学键中储存高达42 kJ/mol的能量,半衰期长达32年。通过紫外线照射或热激活触发回复以释放能量,并且固态能量存储-释放过程重复超过10个循环而不分解。通过改变供体部分和反阴离子上的官能团,我们微调了晶体中的 3D 堆积以及阳离子分子和阴离子之间的静电相互作用,这主要决定了化合物的能量存储能力。这项对苯乙烯吡啶鎓储能能力的定量和机理研究,在深入的晶体结构分析以及光学和热性能测量的支持下,将为新型分子太阳能热能存储材料的开发提供线索,这些材料具有超越常规的高度期望的性能。传统的光电开关。
Conformational analysis of polymethine dyes derived from the 2-azaazulene
作者:Aleksey B. Ryabitskii、Julia L. Bricks、Aleksey D. Kachkovskii、Vladimir V. Kurdyukov
DOI:10.1016/j.molstruc.2011.10.003
日期:2012.1
Abstract A systematic investigation of the conformational structure was performed for the series of symmetrical and unsymmetrical mono-, tri-, pentamethine cyanines, and styryl dyes bearing 2-azaazulenium terminal group. The rotation energy barriers of terminal groups were determined via the dynamic variable temperature NMR experiments. The conformational transformation energy was calculated by quantum
Studies of 2-azaazulenium derivatives – 3: The nature of electron transitions and spectral properties of styryl dyes containing terminal groups of different types
作者:Julia L. Bricks、Alona V. Stanova、Aleksey B. Ryabitsky、Valeriy M. Yashchuk、Aleksey D. Kachkovsky
DOI:10.1016/j.molstruc.2012.08.034
日期:2013.2
This paper presents the results of a quantum-chemical study of the molecular geometry and electron structure as well as spectral measurements of absorption and C-13 NMR spectra of dimethylaminostyryls, methoxystyryls, and methylstyryls bearing 2-azaazlenium (AA) moiety in comparison with analogous dyes containing 2-benzimidazolim and 4-pyrylium residues. Based on the analysis of both calculations and experimental data, it was concluded that these types of extremely unsymmetrical cyanines differ between each other only slightly in the ground state with respect to the charge distribution and molecular geometry while their spectral properties reveal a considerable difference between dimethylaminostyryls and methoxystyryls due to the lowest disposition of the lone electron pair level of the oxygen atom and hence, limiting basicity of the p-methoxyphenylene residue. It was shown that appearance of a high-positioned local level generated by AA terminal group caused the inversion of the delocalized and quasi-local electron transitions in AA-methoxystyryl and hence drastic changes in its absorption spectrum. (C) 2012 Elsevier B.V. All rights reserved.