权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Studies on the Multi-responsible Molecular Systems Involving Visible Light Switching Using Radical Ions

利用自由基离子进行可见光切换的多响应分子系统的研究

基本信息

批准号：
09450319
负责人：
MAJIMA Tetsuro
金额：
$ 1.98万
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：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Radical ions have sharp and intense absorption bands in the visible wavelength range which depend on the structure and substituents of the radical ions. Therefore, it is suggested that radical ions can be excited by diode lasers, that undestructed reading of memory can be essentially performed with high sensitivity, and that triple memory of a molecule can be done with three independent characters of the neutral molecule and radical cation and anion of the molecule. Radical ions are used as starting material for developing of a new multiple-photoresponsible molecular system on the basis of their visile light switching characters. Since radical ions are well known to be generated from radiation reactions and are stable in the μs time scale in solution at room temperature, this study was carried out with a pulse radiolysis-laser flash photolysis combined method which is constructed at ISIR, Osaka University. Photoresponsiblity was examined through one-way photoisomerization of cis-stilbe … More ne radical cation to trans-stilbene radical cation, intermolecular electron transfer from pyrene radical anion in the photoexcited state to an electron acceptor such as bipheny1, and multiple-isomerizations of 1, 4-dipheny1-1, 3-butadiene radical cation and 1, 6-dipheny1-1, 3, 5-hexatriene radical cation. On the basis of experimental results, a new idea of multiple memory involving a neutral mlecule and the radical ions is proposed and possibility of photon-mode memory with high density is suggested by reversible reactions of radical ions. Since photoresponsible reactions of radical ions are performed in an appropriate time range after irradiation of an electron pulse, they are established to be electron-pulse gated photoresponsible reactions. Moreover, various types of molecules are synthesized to be suitable for the multi-responsible molecular systems involving visible light switching using radical ions. Radical ions of the synthetic molecular systems were used to develop new photoresponsible functional materials with high reliability and high speed from visible light as the information source. Less

自由基离子在可见光波长范围内具有尖锐而强烈的吸收带，这取决于自由基离子的结构和取代基。因此，提出了半导体激光器可以激发自由基离子，本质上可以高灵敏度地无损地读取记忆，分子的三重记忆可以通过分子的中性分子和自由基正负离子三个独立的性质来完成。基于自由基离子的光开关特性，我们以自由基离子为原料，开发了一种新型的多光响应型分子体系。由于自由基离子是由辐射反应产生的，并且在室温下在溶液中稳定在μ-S时间尺度内，本研究采用大阪大学ISIR建立的脉冲辐解-激光闪光光解相结合的方法进行。通过顺式仍然存在的…的单向光异构化检测光响应性更多的Ne自由基阳离子转移到反式二苯乙烯自由基阳离子，分子间电子从光激发态的Py自由基阴离子转移到电子受体如联苯1，以及1，4-二苯基-1，3-丁二烯自由基阳离子和1，6-二苯基-1，3，5-己三烯自由基阳离子的多重异构化。根据实验结果，提出了中性分子和自由基离子多重记忆的新概念，并提出了通过自由基离子的可逆反应实现高密度光子模式记忆的可能性。由于自由基离子的光响应反应是在电子脉冲照射后的适当时间范围内进行的，因此被确定为电子脉冲选通的光响应反应。此外，还合成了各种类型的分子，以适用于利用自由基离子进行可见光开关的多责任分子体系。利用合成分子体系中的自由基离子，以可见光为信息源，研制出高可靠性、高速度的新型光响应性功能材料。较少