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Subgap Two-Photon States in Polycyclic Aromatic Hydrocarbons: Evidence for Strong Electron Correlations

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Field Value
 
Title Subgap Two-Photon States in Polycyclic Aromatic Hydrocarbons: Evidence for Strong Electron Correlations
 
Creator ARYANPOUR, K
ROBERTS, A
SANDHU, A
RATHORE, R
SHUKA, A
MAZUMDAR, S
 
Subject LYING EXCITED-STATES
EVEN-PARITY STATES
CONJUGATED POLYMERS
LINEAR POLYENES
SINGLE-BEAM
EXCITATIONS
GRAPHENE
POLYACETYLENES
ABSORPTION
TRANSITION
 
Description Strong electron correlation effects in the photophysics of quasi-one-dimensional a-conjugated organic systems such as polyenes, polyacetylenes, polydiacetylenes, etc., have been extensively studied. Far less is known on correlation effects in two-dimensional pi-conjugated systems. Here we present theoretical and experimental evidence for moderate repulsive electron electron interactions in a. number of finite polycyclic aromatic hydrocarbon molecules with D-6h symmetry. We show that the excited state orderings in these molecules are reversed relative to that expected within one-electron and mean-field theories. Our results reflect similarities as well as differences in the role and magnitude of electron correlation effects in these two-dimensional molecules compared to those in polyenes.
 
Publisher AMER CHEMICAL SOC
 
Date 2014-12-29T05:48:29Z
2014-12-29T05:48:29Z
2014
 
Type Article
 
Identifier JOURNAL OF PHYSICAL CHEMISTRY C, 118(6)3331-3339
1932-7447
http://dx.doi.org/10.1021/jp410793r
http://dspace.library.iitb.ac.in/jspui/handle/100/17233
 
Language English