Rewritable ternary data storage devices based on polymethacrylate containing pendent azobenzene–naphthalene with the combined effects of conformation change and charge traps
作者:Zhuang Li、Ming Wang、Hua Li、Jinghui He、Najun Li、Qingfeng Xu、Jianmei Lu
DOI:10.1039/c7tc02473h
日期:——
under a continuous electric field, which could be corresponding to “0”, “1” and “2” for ternary data storage. The conductance switching can be explained in terms of field-induced conformational ordering of the side-chains in the polymer, and the “traps” of azobenzene impeding the mobility of the charge carriers. X-ray diffraction patterns were carried out to confirm the conformation change of the pendent
explored for polyimides (PIs), trans–cis and cis–trans photo/thermalisomerizations are surveyed by UV–vis and 1H NMR investigations. UV–vis absorption studies reveal unprecedented fast trans–cis switches (47–130 s) through rotation mechanism in dimethylformamide, with one of the highest efficiencies reported nowadays for PIs, up to 90.2%. Slower thermalcis–trans relaxation is experienced owing to a nonpolarity-assisted
在智能材料开发研究的基础上,合成了包含高光响应性偶氮-萘基的新型偶氮聚酰亚胺,并充分表征了其高效,快速和稳定的顺-反光/热异构化转换的特性。为此,制备了一种带有光致变色受体的新型三苯甲烷二胺,并将其用于与芳族二酐的缩聚反应中。深入了解分子量,热,光学和电化学特性,以完成基本表征。为了证明对于聚酰亚胺(PI)的开关特性研究不足,通过UV-vis和1考察了反式-顺式和顺式-反式光/热异构化1 H NMR研究。紫外可见吸收研究表明,在二甲基甲酰胺中通过旋转机理实现了前所未有的快速反式转换(47-130 s),是目前报道的PI的最高效率之一,高达90.2%。由于非极性辅助的反转机制,顺式-反式弛豫速度较慢。经过15次重复的反-顺-反转换循环,记录的稳定性高达96.29%。经过10次循环后,在没有任何稀释的情况下获得的PI膜在经过更长的照射时间后便达到了光平稳状态,但效率高达75.7%,反-顺-反-转换的稳定性高达92
Kinetik der Diazotierung des α-Naphthylamins in wäßriger Chlorwasserstofflösung, 2. Mitt.
作者:Alfred Woppmann
DOI:10.1007/bf00799229
日期:1982.8
McPherson; Gore, American Chemical Journal, 1901, vol. 25, p. 492