Creation of Molecular Glasses and Elucidation of the Relationship between Structures, and Properties and Functions

分子玻璃的创造以及结构、性质和功能之间关系的阐明

基本信息

批准号：
08454224
负责人：
SHIROTA Yasuhiko
金额：
$ 4.67万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

For the purpose of creating molecular glasses, novel pi-electron starburst molecules and other pi-electron systems were designed and synthesized. They were found to readily form stable amorphous glasses with relatively high glass-transition temperatures. The relationship between molecular structures and glass-forming properties, and the stability and glass-transition temperature was investigated. X-Ray crystal structure analyzes of several compounds which form amorphous glasses provided information on the relationship between molecular structure and glass-forming property.Charge transport in the molecular glass was investigated. Hole drift mobilities of several molecular glasses were determined and temperature and electric-field dependences of the hole drift mobility in the molecular glass were analyzed. As a result, valuable information on the relationship between molecular structure and charge transport properties was obtained. In addition, negative-electric field dependence of hole drift mobility was observed for the first time for the molecular glass.Photochromism of an azobenzene derivative dispersed in a molecular glass was investigated in comparison with that dispersed in polystirene. In addition, positron annihilation lifetime in the molecular glass was determined. The results suggested that the local free volume in the molecular glass is smaller than that in polymer glasses.Organic electroluminescent devices using molecular glasses were fabricated and their performances were investigated. Exciplex formation at the interface between hole- and electron-transport layrs was studied. It was shown that the emission color the device can be turned by using the exciplex emission.

为了创建分子玻璃，设计和合成了新型的Pi-Electron Starburst分子和其他Pi-Electron系统。发现它们很容易形成稳定的无定形玻璃，并具有相对较高的玻璃转换温度。研究了分子结构与玻璃形成特性之间的关系，以及稳定性和玻璃转换温度。对几种形成无定形玻璃的几种化合物的X射线晶体结构分析提供了有关分子结构和玻璃形成特性之间关系的信息。分子玻璃中的充电传输。确定了几个分子玻璃的孔漂移迁移率，并分析了分子玻璃中孔漂移迁移率的温度和电场依赖性。结果，获得了有关分子结构与电荷传输特性之间关系的宝贵信息。另外，第一次观察到分子玻璃的孔漂移迁移率的负极依赖。此外，确定了分子玻璃中的正电子歼灭寿命。结果表明，分子玻璃中的局部游离体积小于聚合物玻璃杯中的局部游离体积。制造了使用分子玻璃的有机电发光设备，并研究了其性能。研究了孔 - 和电子传输层之间的界面上的分离形成。结果表明，可以使用Expiplex发射来转动设备的发射颜色。