Photochemical Processes Involved in a Biopolymer Doped by Chromium(VI) during Hologram Recording

Israëli, Yaël; Frézet, Lawrence; Rivaton, Agnès

doi:10.1080/10601320802457840

Cited by 2 publications

(2 citation statements)

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“…Proteins have rather complex chemical structures and photo-products formed along the biopolymeric chains; on the whole, photo-redox processes are different. The photo-stability of the matrixhas been demonstrated experimentally with hologram recording, allowing proposing the dichromated albumin as a good photosensitive biomaterial [34] [35]. There are no published reports of a detailed explanation of chemical reactions that have taken place.…”

Section: Photochemical Processesmentioning

confidence: 99%

“…In a fast stage, Cr 6+ is photo-reduced to Cr 5+ (meta-stable oxochromium ion) [32]. It involves electron transfer of the biopolymer matrix to the metallic cation, giving rise to the formation of an anion-macroradical and to chromium (V), initiating the process of image formation till the reduction of Cr 3+ [27]- [34]. Proteins have rather complex chemical structures and photo-products formed along the biopolymeric chains; on the whole, photo-redox processes are different.…”

Section: Photochemical Processesmentioning

confidence: 99%

See 1 more Smart Citation

Holograms in Albumins and Optical Properties Recorded in Real Time

Olivares‐Pérez¹,

Ordóñez-Padilla²,

Toxqui-López³

2015

OPJ

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Holographic recording analysis was performed on the films that were sensitized with ammonium dichromate with albumin of hen and quail (Gallus gallus and Callipepla cali) as abiopolymeric photosensitive matrix. The samples were exposed to an He-Cd laser, λ = 442 nm, at various concentrations, and diffraction efficiencies were measured as a function to the energy, thickness, protein density, aging time, and spatial frequencies. The photosensitivity was measured as a function of storage time, and the gratings were recorded in real time. The photochemical processes involved in the formation of holographic image are described. The results indicate the behavior of colloidal systems based on albumin bird build holographic recording materials.

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Section: Photochemical Processesmentioning

confidence: 99%