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Photophysics of small molecules-in clusters and rare gas crystals-

小分子的光物理学——簇状和稀有气体晶体——

基本信息

批准号：
05044080
负责人：
KODA Seiichiro
金额：
$ 3.52万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05044080/
关键词：
low temperature crystal cluster photophysical processes excimer exciplex XeS oxygen atoms D_2 solid 緩和

项目摘要

The objective of the present international scientific research program is to study the photopysical and photochemical behaviors of small molecules doped in low temperature rare gas crystals when they are irradiated by strong uv lasers, under the collaboration between the group of Prof.Koda (the University of Tokyo) and Prof.Apkarian (University of California, Irvine).1. Study in Koda's LaboratoryIn order to obtain information about the unknown XeS exciplex state and the emissions therefrom, the photophysical behavior of S-containing compounds doped in a Xe crystal under the irradiation of KrF excimer laser was investigated. In free standing crystals of Xe, OCS was found to readily dissociate upon irradiation at 248 nm. With the continuation of the laser irradiation, abroad emission centered at 346 nm was found to grow, which was assigned to the XeS charge transfer exciplex transition in the crystal. Temperature induced mobility of S atoms was documented : upon warm-up, the intensity of the exciplex emission decreased with concomitant increase of the S_2 (B*X) emission band intensity.2. Study in Apkarian's LaboratoryThe Photophysical behavior of O_2 doped in a D_2 crystal was studied in order to obtain informations concerning the following items. They are ; the reactivity or the lack thereof of O (singlet) with D_2 in solid D_2, the optical activity of O near O_2, diffusion of O and O_2 in solid D_2, and their relations to the character of the quantum solids of D_2.3. CollaborationThe researchers of individual groups visited the other group each other and good collaboration was performed.

目前国际科学研究计划的目标是在Koda教授（东京大学）和Apkarian教授（加州大学欧文分校）团队的合作下，研究低温稀有气体晶体中掺杂的小分子在强紫外激光照射下的光物理和光化学行为。1。 Koda实验室的研究为了获得有关未知XeS激基复合物状态及其发射的信息，研究了掺杂在Xe晶体中的含S化合物在KrF准分子激光照射下的光物理行为。在独立的 Xe 晶体中，OCS 在 248 nm 的照射下很容易解离。随着激光照射的继续，发现以 346 nm 为中心的外部发射不断增长，这归因于晶体中的 XeS 电荷转移激基复合物跃迁。记录了温度引起的S原子迁移率：在预热时，激基复合物发射的强度随着S_2(B*X)发射带强度的增加而降低。2． Apkarian实验室的研究对D_2晶体中掺杂O_2的光物理行为进行了研究，以获得有关以下项目的信息。他们是；固体D_2中O（单线态）与D_2的反应性或缺乏，O在O_2附近的旋光性，O和O_2在固体D_2中的扩散，以及它们与D_2.3量子固体性质的关系。协作各课题组的研究人员互相拜访，进行了良好的协作。