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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Photochemical Processes Involved in a Biopolymer Doped by Chromium(VI) during Hologram Recording
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Photochemical Processes Involved in a Biopolymer Doped by Chromium(VI) during Hologram Recording

机译：全息图记录过程中涉及铬（VI）掺杂的生物聚合物的光化学过程

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摘要

This paper is devoted to the study of the photochemical processes occurring during hologram formation in a biopolymer, agar doped by chromium(VI). The evolution of both the absorbing chromium species and the polymer allowed elucidating the reactions taking place during irradiation in conditions representative of hologram formation. As previously observed with dichromated poly(vinyl alcohol) (PVA), polymer containing hydroxyl groups as agar, irradiation of dichromated agar provoked a two step reduction of chromium species and the crosslinking of the host polymer. But agar has a rather complex chemical structure and the photoproducts formed along the polymeric chains throughout the photoredox process were different in agar and in PVA. The photostability of the matrix, that has been proven, coupled with the possibility to record good quality holograms, allowed us to propose dichromated agar as a new natural photosensitive biomaterial.
机译：本文致力于研究由铬（VI）掺杂的生物聚合物在全息图形成全息图期间发生的光化学过程。吸收性铬物种和聚合物的放出可以阐明在辐照期间在代表全息图形成的条件下发生的反应。如先前用重铬酸盐的聚乙烯醇（PVA）所观察到的那样，含羟基的聚合物作为琼脂，重铬酸盐琼脂的辐射引发了铬物种的两步还原和主体聚合物的交联。但是琼脂具有相当复杂的化学结构，并且在整个光氧化还原过程中沿聚合物链形成的光产物在琼脂和PVA中是不同的。基质的光稳定性已被证明，再加上记录高质量全息图的可能性，使我们能够提出重铬酸琼脂作为一种新的天然光敏生物材料。

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