Fabrication of Phorochromic Molecular Arrays and Single Molecule Photoisomerization

光致变色分子阵列的制备和单分子光异构化

基本信息

批准号：
16510090
负责人：
OTSUKI Joe
金额：
$ 2.5万
依托单位：
Nihon University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16510090/
关键词：
Photochromism Porphyrin Axial Coordination High-Density Memory Molecular Switch Energy Transfer Electron Transfer Scanning Tunneling Microscopy HOPG STM 超分子化学分子メモリ分子アレイ

项目摘要

It is expected for photochromic molecules to play a role in molecular electronics as a conductivity switch in molecular wires and a single molecule memory. The purpose of this work is to establish the fabrication method for high-density arrays of photochromic compounds, to reveal changes in molecular conductivities by photochromic reactions on an individual molecule basis, and to fabricate a prototype of super-high density memory. We have achieved the following points in the past two years and obtained high-density arrays of photochromic compounds. The next challenge will be to obtain photoresponse on an individual molecule basis.1.Photochromism. We have revealed the characteristics of phenylazoimidazoles as a novel class of photochromes2.Fabrication of Arrays. We have fabricated high-density, ordered arrays of molecules, in particular porphyrins, which are expected to template the array formation for photochromic compounds through axial coordination, and revealed the structure at mole … More cular level.(1)We have shed light on the rotation of molecules with the array of double-decker porphyrins.(2)We have shown that two-dimensional patterning is possible by means of porphyrins with hydrogen bonding capability.(3)We have fabricated the arrays of tripod-type molecules, which are expected to be the pedestals for photochromes.3.Porphyrin Assemblies. We have constructed porphyrin assemblies, in particular to incorporate photochromic compounds, and revealed their functions.(1)We have constructed molecular assemblies consisting of three molecular components via axial coordination and revealed electron transfer processes in the assemblies.(2)We have realized remote control of fluorescence in a molecular assembly.(3)We have realized the control of fluorescence by means of complexation/decomplexation of an axial ligand or structural changes upon photochromic reactions.(4)We have found, in a porphyrin assembly, a fast energy transfer phenomenon, which is faster than expected from conventional mechanisms. Less

光致变色分子有望在分子电子学中发挥作用，作为分子线中的电导开关和单分子存储器。这项工作的目的是建立高密度光致变色化合物阵列的制造方法，以揭示光致变色化合物的变化。我们在过去两年中取得了以下成果，并获得了高密度光致变色化合物阵列。下一个挑战将是在单个分子的基础上获得光响应。1.光致变色我们揭示了苯基偶氮咪唑作为一类新型光致变色材料的特性2.阵列的制造我们特别制造了高密度、有序的分子阵列。卟啉，有望通过轴向配位来模板化光致变色化合物的阵列形成，并揭示了摩尔水平的结构。（1）我们有利用双层卟啉阵列揭示了分子的旋转。(2)我们证明了利用具有氢键能力的卟啉可以实现二维图案化。(3)我们制造了三脚架型阵列分子，预计将成为光致变色的基础。3.卟啉组件我们已经构建了卟啉组件，特别是掺入光致变色化合物，并揭示了它们的用途。 (1)我们通过轴向配位构建了由三个分子组分组成的分子组装体，并揭示了组装体中的电子传递过程。(2)我们实现了分子组装体中荧光的远程控制。(3)我们实现了荧光的远程控制。通过轴向配体的络合/解络或光致变色反应的结构变化来产生荧光。(4)我们发现，在卟啉组装体中，存在快速能量转移现象，比传统机制预期的要快。