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dc.contributor.authorDeepak, V D-
dc.contributor.authorAsha, S K-
dc.date.accessioned2013-11-13T06:01:43Z-
dc.date.available2013-11-13T06:01:43Z-
dc.date.issued2009-
dc.identifier.citationJournal of Physical Chemistry B 113(35):11887-11897;03 Sep 2009en_US
dc.identifier.issn1520-6106-
dc.identifier.urihttp://ir.niist.res.in:8080/jspui/handle/123456789/734-
dc.description.abstractA side chain urethane methacrylate polymer with pendant pyrene units was synthesized and investigated for its self-organizing process in solution by UV-vis and fluorescence spectra and in film by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and fluorescence microscopy. The polymer exhibited excimer emission centered at 476 nm, even at very dilute concentrations (10(-6) M) as a consequence of the polymer design with pendant pyrene units on every side chain. A change in aggregation pattern was observed upon increasing the concentration to 10(-4) M. New red-shifted peaks appeared in the UV-vis absorption spectra and the I(E)/I(M) ratio, and the peak I/peak III ratio showed a break around 10(-4) M, suggesting formation of stable ground state aggregates. This was further confirmed by the SEM, TEM, AFM and fluorescence microscope studies, which showed the formation of vesicles in THF and giant spherical aggregates in THF/H(2)O. The change in pattern of aggregate formation with concentration also coincided with a sudden increase in the intensity of the hydrogen bonded urethane N-H peak with concentration as recorded by solution FT-IR studies in THF.en_US
dc.language.isoenen_US
dc.publisherAmerican Chemical Societyen_US
dc.subjectAmphiphilic block-polymersen_US
dc.subjectMultiple morphologiesen_US
dc.subjectDynamic fluorescenceen_US
dc.subjectAqueous solutionsen_US
dc.subjectExcimer formationen_US
dc.subjectCarbon nanotubesen_US
dc.subjectChain dynamicsen_US
dc.titlePhotophysical investigation into the self-organization in pyrene-based urethane methacrylate comb polymeren_US
dc.typeArticleen_US
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