NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.44 [2006] >
IJPAP Vol.44(04) [April 2006] >


Title: Steady-state absorption and fluorescence study: Dipole moments of coumarins
Authors: Chandrasekhar, K
Naik, L R
Kumar, H M Suresh
Math, N N
Keywords: Dipole moments
Fluorescence spectra
Absorption spectra
Coumarins
Issue Date: Apr-2006
Publisher: CSIR
IPC CodeG01J3/28
Abstract: The absorption and fluorescence spectra of 7-dimethylamino cyclopenta [c] coumarin (C138) and 4-methyl-piperidino [g] coumarin (C339) dyes were measured in neutral, aprotic and protic solvents. Solvatochromic shifts of absorption and fluorescence as a function of different solvent polarity parameters (bulk as well as microscopic) were analyzed for these dyes and the ground state dipole moment ( g) and the first excited singlet state dipole moment ( e) were estimated to be g = 2.2 and 3.42 D and e = 4.58 and 5.2 D, respectively, for C138 and C339. The dipole moment values of g = 3.4 D and g = 3.8 D were also obtained for C138 and C339 respectively from ab- initio calculations. The results are compared and discussed.
Page(s): 292-299
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.44(04) [April 2006]

Files in This Item:

File Description SizeFormat
IJPAP 44(4) 292-299.pdf165.07 kBAdobe PDFView/Open
 Current Page Visits: 471 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 602274 since 06-Feb-2009  Last updated on 17-Oct-2014Webmaster: nopr@niscair.res.in