Title

Two-photon absorption of a supramolecular pseudoisocyanine J-aggregate assembly

Authors

Authors

K. D. Belfield; M. V. Bondar; F. E. Hernandez; O. V. Przhonska;S. Yao

Comments

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Abbreviated Journal Title

Chem. Phys.

Keywords

PIC; J-aggregates; two-photon absorption; excitation anisotropy; ONE-PHOTON; SPECTROSCOPY; ENHANCEMENT; FLUORESCENCE; DYE; RELAXATION; EXCITATION; DYNAMICS; WATER; SIZE; Chemistry, Physical; Physics, Atomic, Molecular & Chemical

Abstract

Linear spectral properties, including excitation anisotropy, of pseudoisocyanine or 1, 1'-diethyl-2,2'-cyanine iodide (PIC) J-aggregates in aqueous solutions with J-band position at 573 nm were investigated. Two-photon absorption of PIC J-aggregates and monomer molecules was studied using an open aperture Z-scan technique. A strong enhancement of the two-photon absorption cross-section of PIC in the supramolecular J-aggregate assembly was observed in aqueous solution. This enhancement is attributed to a strong coupling of the molecular transition dipoles. No two-photon absorption at the peak of the J-band was detected. (c) 2005 Elsevier B.V. All rights reserved.

Journal Title

Chemical Physics

Volume

320

Issue/Number

2-3

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

118

Last Page

124

WOS Identifier

WOS:000234622900006

ISSN

0301-0104

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