First hyperpolarizabilities of some push-pull olefins measured by the hyper-Rayleigh scattering technique

Mohanalingam, K and Ray, Paresh Chandra and Das, Puspendu Kumar (1996) First hyperpolarizabilities of some push-pull olefins measured by the hyper-Rayleigh scattering technique. In: Synthetic Metals, 82 (1). pp. 47-51.

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Abstract

First hyperpolarizabilities of a series of donor-acceptor substituted ethylenes and butadienes have been measured using the hyper-Rayleigh scattering technique. Keeping the donor group fixed as climethylamino, the second-order nonlinear coefficient $_\beta$ in these aliphatic systems has been measured and is shown to increase as a function of the acceptor strength with the exception of the cyano group. $_\beta$ values of the substituted butadienes are correlated with their bond length alternation parameter $\langle\delta r\rangle$ obtained from semi-empirical calculations. It is shown that even in these small push-pull olefins, it is possible to generate a variety of ground state structures by choosing a suitable acceptor with a fixed donor.

Item Type:	Journal Article
Publication:	Synthetic Metals
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Hyper-Rayleigh scattering;Push-pull olefin;Bond length alternation;First hyperpolarizability
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	17 Jan 2007
Last Modified:	19 Sep 2010 04:33
URI:	http://eprints.iisc.ac.in/id/eprint/9313

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