External iodine atoms influence over the intersystem crossing rate of a cyanine iodide ion pair in benzene solution

Journal Article · Thu Mar 07 04:00:00 EST 1991 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100158a006· OSTI ID:5530172

Sauerwein, B; Schuster, G B ^[1]

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1. Univ. of Illinois, Urbana (USA)

The photochemical and photophysical properties of N,N{prime}-dibutyltetramethylindocarbocyanine iodide {l brace}(TMIC){sub Bu}{sup +}I{sup {minus}}{r brace} in benzene solution were examined by absorption spectroscopy and flash photolysis on a picosecond time scale. In benzene solution, the dye iodide exists nearly exclusively as an ion pair. Under these conditions the absorption spectrum of the cyanine dye is perturbed by the iodide ion by a dispersion interaction. Irradiation of the cyanine iodide ion pair generates the triplet-state cyanine.

• OSTI ID: 5530172
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 95:5; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ABSORPTION SPECTROSCOPY
AROMATICS
BENZENE
CHEMICAL REACTIONS
COMPLEXES
CYANINE DYES
DATA
DATA ANALYSIS
DECOMPOSITION
DYES
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
IODINE COMPLEXES
ION PAIRS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
SPECTROSCOPY