# Second harmonic generation in push-pull ethylenes: Influence of chirality and hydrogen bonding

Mohanalingam, K and Nethaji, M and Das, Puspendu Kumar (1996) Second harmonic generation in push-pull ethylenes: Influence of chirality and hydrogen bonding. In: Journal of Molecular Structure, 378 (3). pp. 177-188.

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## Abstract

The effect of chiral substituents and hydrogen bonding functional groups on the microscopic and macroscopic secondorder non-linearities in some donor-acceptor substituted ethylenes has been investigated. It appears that extensive intramolecular and intermolecular hydrogen bonding helps to improve both the microscopic hyperpolarizability $(\beta)$ as well as the powder second harmonic generation (SHG) efficiency in these compounds. The substitution of the chiral \alpha-methylbenzylamine donor guarantees a non-centrosymmetric structure. Cocrystallization with triphenylphosphine oxide (TPPO) does not appear to yield better SHG efficiency in the \alpha-methylbenzylamine substituted ethylene compound which has an extended hydrogen bonding network.

Item Type: Journal Article Copyright of this article belongs to Elsevier. Hydrogen bonding;Chirality;Second harmonic generation;Push-pull ethylene Division of Chemical Sciences > Inorganic & Physical Chemistry 01 Dec 2006 19 Sep 2010 04:33 http://eprints.iisc.ernet.in/id/eprint/9072