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Exploring the structural changes on excitation of a luminescent organic bromine-substituted complex by in-house time-resolved pump-probe diffraction

Basuroy, Krishnayan and Chen, Yang and Sarkar, Sounak and Benedict, Jason and Coppens, Philip (2017) Exploring the structural changes on excitation of a luminescent organic bromine-substituted complex by in-house time-resolved pump-probe diffraction. In: STRUCTURAL DYNAMICS, 4 (2).

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Official URL: http://dx.doi.org/10.1063/1.4978240

Abstract

The structural changes accompanying the excitation of the luminescent dibromobenzene derivative, 1,4-dibromo-2,5-bis(octyloxy) benzene, have been measured by in-house monochromatic time-resolved (TR) diffraction at 90K. Results show an increment of the very short intermolecular Br center dot center dot center dot Br contact distance from 3.290 angstrom to 3.380 angstrom. Calculations show the Br center dot center dot center dot Br interaction to be strongly repulsive in both the Ground and Excited states but significantly relaxed by the lengthening of the contact distance on excitation. The stability of the crystals is attributed to the many weak C-H center dot center dot center dot Br and C-H center dot center dot center dot pi intermolecular interactions. The study described is the first practical application of In-House Time-Resolved diffraction, made possible by the continuing increase in the brightness of X-ray sources and the sensitivity of our detectors. (C) 2017 Author(s).

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER INST PHYSICS, 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 17 Jun 2017 04:10
Last Modified: 17 Jun 2017 04:10
URI: http://eprints.iisc.ac.in/id/eprint/57240

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