9 June 1998 Primary photoprocesses in dichromated gelatin
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The photochemical behavior of dichromated gelatin and of different aminoacids-chromium (VI) systems was investigated. The photoredox process that takes place between chromium (VI) (complexed or not) and the organic moiety leads to the formation of chromium (V) which is then reduced to chromium (III) likely complexed in the medium. In chromium (VI)-aminoacids systems, the quantum yield (Phi) , that measures the efficiency of a photon at a given wavelength, strongly depends on the reductive properties of the aminoacid. (Phi) is proportional to aminoacid concentration. In irradiated DCG films, the formation of chromium (V) is observed and this intermediate species appears to be surprisingly stable in the polymeric matrix. For the first time, we were able to quantitatively measure the formation of Chromium (V) in dichromated photosensitive materials.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christophe Lafond, Christophe Lafond, Christine Pizzocaro, Christine Pizzocaro, Michel Bolte, Michel Bolte, } "Primary photoprocesses in dichromated gelatin", Proc. SPIE 3282, Photosensitive Optical Materials and Devices II, (9 June 1998); doi: 10.1117/12.311533; https://doi.org/10.1117/12.311533

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