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SIMULATION OF COLOR TUNING AND PHOTOISOMERIZATION OF PROTONATED RECHINAL SCHIFF BASE IN MODIFIED CLAY INTERLAYERS AND ITS APPLICATION TO PHOTOSENSITIVE MATERIALS

改性粘土中间层中质子化Rechinal Schiff碱的调色和光异构化模拟及其在感光材料中的应用

基本信息

批准号：
10450325
负责人：
SASAKI Masako
金额：
$ 2.56万
依托单位：
Tokai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

Retinal is the chromophore in the vision process. Ultra fast and reversible visual response in the human eye covering the broad visible wavelength range of 400-800 nm can be achieved by the protonation of the retinal Schiff base (RSB) in protein-opsin, We have found that clay acts as a novel model matrix for the amphiphilic protein-opsin environment to mimic the visible absorption spectrum of protonated RSB in vivoィイD11)ィエD1.In this study there are two aims for examination. The first is control of color tuning and production of reversible photoisomerization of protonated RSB in modified clay interlayers, and the second is development of new photosensitive materials by mimicry of ultra fast vision process.Montmorillonite (MONT) was used as the model matrix for protein-opsin. MONT interlayers were changed to amphiphilic space by ion-exchange from metal ion to cationic surfactants, Two model matrices were prepared, and color tuning of protonated RSB from 400 nm to 600 nm was achieved without strong acids at room temperature. Rhodopsin-like photoisomerization of protonated 11-cis RSB to all-trans RSB was obtained with high efficiency in the modified MONT interlayers. Non-linear optical function of all-trans RSB in the modified MONT layers (RSB-MONT) was examined, and primary non-linear response of the RSB-MONT was observed.In conclusion, modified MONT provides a suitable model matrix for mimicry of the role of the protein-opsin environment. Rhodopsin-like color tuning and photoisomerization of protonated RSB in modified MONT was achieved. The possibility of non-lincar optical material of RSB-MONT was suggested.

视网膜是视觉过程中的发色团。人眼中覆盖400-800 nm的宽可见波长范围的超快速和可逆的视觉响应可以通过蛋白质-视蛋白中的视网膜席夫碱（RSB）的质子化来实现，我们已经发现粘土作为一种新的模型基质，用于两亲性蛋白质-视蛋白环境，以模拟体内质子化RSB的可见吸收光谱。ィエD1.In this study there are two aims for examination.第一个是在改性粘土中间层中控制颜色调谐和产生质子化RSB的可逆光异构化，第二个是通过模拟超快视觉过程开发新的光敏材料。通过金属离子与阳离子表面活性剂的离子交换，将MONT层间变为两亲性层，制备了两种模型基质，在室温下，不使用强酸，实现了400 ~ 600 nm的质子化RSB颜色调谐。质子化11-cis RSB在改性MONT中间层中高效地发生了类视紫红质光异构化反应。研究了全反式RSB在改性MONT膜中的非线性光学功能，观察到了主要的非线性响应，表明改性MONT膜为模拟蛋白质-视蛋白环境的作用提供了一个合适的模型基质。质子化的RSB在MONT中实现了类视紫红质的颜色调谐和光异构化。提出了RSB-MONT非线性光学材料的可能性。