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First hyperpolarizability of bacteriorhodopsin, retinal and related molecules revisited

Ghosh, Sampa and Ranjini, Arumugam Sri and Pandey, Ravindra and Das, Puspendu Kumar (2009) First hyperpolarizability of bacteriorhodopsin, retinal and related molecules revisited. In: Chemical Physics Letters, 474 (4-6). pp. 307-310.

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The previously reported beta values of BR and retinal based chromophores were very high but subsequent measurements found them to be much less. We have found that the beta values of these compounds do not vary so much with experimental conditions as with the method of analysis. Hyper-Rayleigh scattering measurements at 1543 and 1907 nm produce more realistic beta values close to the intrinsic (static) hyperpolarizability, beta(0) which for BR is still very high (275 x 10 (30) esu). The optical nonlinearity of BR arises entirely due to the protonated retinal Schiff Base (PRSB) which in its isolated form has the same intrinsic hyperpolarizability as that of the rotein.

Item Type: Journal Article
Publication: Chemical Physics Letters
Publisher: Elsevier science
Additional Information: Copyright for this article belongs to Elsevier science.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 21 Jul 2009 11:18
Last Modified: 19 Sep 2010 05:34
URI: http://eprints.iisc.ac.in/id/eprint/20850

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