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

Retinal is the chromophore in the vision process. Ultra fast and reversible visual response in thehuman eye covering the broad visible wavelength range of 400-800 nm can be achieved by theprotonation of the retinal Schiff base (RSB) in protein-opsin我们曾发现，作为一个novel model matrix for the amphiphilic protein-opsin environmentto mimic the visible absorption spectrum of protonated RSB in体内D11 . in this study there aretwo aims for examination. The first is control of color tuning and production of reversiblephotoisomerization of protonated RSB in modified clay interlayers，and the second is development of new photosensitive materials by mimicry of ultra fast visionprocess.Montmorillonite (MONT) was used as the model matrix for protein-opsin. MONT interlayers were改变amphiphilic space by ion-exchange from metal ion to cationic surfactantsTwo model matrices prepared，and color tuning of protonated RSB from 400 nm to 600 nm was achieved without strong acids at roomtemperature. Rhodopsin-like photoisomerization of protonated 11-cis RSB to all-trans RSB was非线性光学功能（Non-linear optical function）trans RSB in the modified MONT layers (RSB-MONT) was examined主要非线性反应RSB-MONT was observed.In conclusion，modified MONT provides a suitable model matrix for mimicry of the role of the protein-opsin环境Rhodopsin-like color tuning and photoisomerization of protonated RSB in modified MONTThe possibility of non-lincar optical material of RSB-MONT was suggested。

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.