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Photophysical behavior of poly(propyl ether imine) dendrimer in the presence of nitroaromatic compounds

Bagul, Rahul S and Rajesh, Yamajala BRD and Jayamurugan, Govindasamy and Bera, Achintya and Sood, AK and Jayaraman, Narayanaswamy (2013) Photophysical behavior of poly(propyl ether imine) dendrimer in the presence of nitroaromatic compounds. In: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 253 . pp. 1-6.

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Official URL: http://dx.doi.org/10.1016/j.jphotochem.2012.12.011...

Abstract

This paper deals with a study of the photophysical property of poly(ether imine) (PETIM) dendritic macromolecule in the presence of aromatic compounds. The inherent photoluminescence property of the dendrimer undergoes quenching in the presence of guest aromatic nitro-compounds. From life-time measurements study, it is inferred that the lifetimes of luminescent species of the dendrimer are not affected with nitrophenols as guest molecules, whereas nitrobenzenes show a marginal change in the lifetimes of the species. Raman spectral characteristic of the macromolecular host-guest complex is conducted in order to identify conformational change of the dendrimer and a significant change in the stretching frequencies of methylene moieties of the dendrimer is observed for the complex with 1,3,5-trinitrobenzene, when compared to other complexes, free host and guest molecules. The photophysical behavior of electron-rich, aliphatic, neutral dendritic macromolecule in the presence of electron-deficient aromatic molecules is illustrated in the present study. (C) 2012 Elsevier B.V. All rights reserved.

Item Type: Journal Article
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Additional Information: Copyright for this article belongs to the ELSEVIER SCIENCE SA, SWITZERLAND.
Keywords: Dendrimers; Aromatics; Fluorescence; Host-guest systems; Raman spectroscopy; Time-resolved fluorescence spectroscopy
Department/Centre: Division of Chemical Sciences > Organic Chemistry
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 15 Apr 2013 11:43
Last Modified: 15 Apr 2013 11:43
URI: http://eprints.iisc.ernet.in/id/eprint/46402

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