CaltechAUTHORS
  A Caltech Library Service

Exciton and vibronic effects in the spectroscopy of bianthracene in supersonic beams

Khundkar, Lutfur R. and Zewail, Ahmed H. (1986) Exciton and vibronic effects in the spectroscopy of bianthracene in supersonic beams. Journal of Chemical Physics, 84 (3). pp. 1302-1311. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:20160920-105243107

[img] PDF - Published Version
See Usage Policy.

1079Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20160920-105243107

Abstract

Excitation and dispersed fluorescence spectra of 9,9’‐bianthracene in a supersonic expansion are reported. The spectra are anthracene‐like, indicating that the rings are weakly coupled. Exciton effects are considered in the interpretation of the spectra. The torsional potential in S_1 is modeled as a double‐well (Gaussian perturbation on a one‐dimensional harmonic oscillator) with barriers to perpendicularity and planarity of ∼30 and ∼1100 cm^(−1), respectively. The S_0 torsional potential shows negative anharmonicity which is modeled as a quartic perturbation. Anthracenic modes in S_1 and S_0 are also assigned. Finally, measurements of S_1 fluorescence lifetimes up to ∼6000 cm^(−1) excess energy in the excited state show no evidence of charge transfer.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.450521DOIArticle
http://scitation.aip.org/content/aip/journal/jcp/84/3/10.1063/1.450521PublisherArticle
Additional Information:© 1986 American Institute of Physics. Received 01 October 1985 Accepted 30 October 1985. It is a pleasure to acknowledge the National Science Foundation (Grant No. DMR-8521191) for its support of this research. We also thank Dr. Jack A. Syage and Dr. Peter M. Felker for their generous assistance in recording the spectra and for many helpful discussions.
Funders:
Funding AgencyGrant Number
NSFDMR-8521191
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Arthur Amos Noyes Laboratory of Chemical Physics7306
Record Number:CaltechAUTHORS:20160920-105243107
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160920-105243107
Official Citation:Exciton and vibronic effects in the spectroscopy of bianthracene in supersonic beams Khundkar, Lutfur R. and Zewail, Ahmed H., The Journal of Chemical Physics, 84, 1302-1311 (1986), DOI:http://dx.doi.org/10.1063/1.450521
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:70465
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:29 Sep 2016 21:12
Last Modified:29 Sep 2016 21:12

Repository Staff Only: item control page