College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215123, People's Republic of China.
ACS Appl Mater Interfaces. 2014 Jan 8;6(1):94-100. doi: 10.1021/am405000c. Epub 2013 Dec 20.
In this study, two D-A molecules NACANA and CANACA, based on carbazole (CA) donor and naphthalimide (NA) acceptor, with different D-A arrangement (A-D-A and D-A-D) were synthesized. The photophysical and electrochemical properties, microstructure and memory behaviors of both A-D-A and D-A-D molecules were systematically investigated. The fabricated devices ITO/NACANA or CANACA layer/Al with a simple sandwich configuration both exhibited volatile nature after shutting off the external electric field. Interestingly, NACANA showed ON-state retention time of ca. 12 min, longer than that of CANACA (ca. 6 min). The difference in retention ability of the programmed states could be assigned to the difference of the D-A arrangement. This type of retention ability adjustment by varying the arrangement of donor and acceptor segments may provide a guide of structure design for future organic-based specific memory devices with tunable volatile property.
在这项研究中，我们合成了两种基于咔唑（CA）供体和萘酰亚胺（NA）受体的 D-A 分子 NACANA 和 CANACA，它们具有不同的 D-A 排列（A-D-A 和 D-A-D）。我们系统地研究了这两种 A-D-A 和 D-A-D 分子的光物理和电化学性质、微结构和记忆行为。采用简单的三明治结构，ITO/NACANA 或 CANACA 层/Al 器件在关闭外电场后均表现出易失性。有趣的是，NACANA 显示出约 12 分钟的 ON 状态保持时间，长于 CANACA（约 6 分钟）。编程状态保持能力的差异可以归因于 D-A 排列的差异。通过改变供体和受体段的排列来调整这种保持能力可能为具有可调挥发性的未来基于有机的特定记忆器件的结构设计提供指导。
