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TRIPLET YIELD OF MEROCYANINE 540 IN WATER IS WAVELENGTH DEPENDENT
Author(s) -
Seret A.,
Hoebeke M.,
Vorst A.
Publication year - 1990
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1990.tb01805.x
Subject(s) - photochemistry , absorbance , triplet state , anthracene , chemistry , merocyanine , excited state , visible spectrum , monomer , ground state , absorption (acoustics) , fluorescence , wavelength , yield (engineering) , excitation , materials science , molecule , optoelectronics , atomic physics , photochromism , optics , polymer , physics , organic chemistry , chromatography , quantum mechanics , metallurgy , composite material
— Monomers and aggregates of Merocyanine 540 (MC540) in water are able to photoisomerize. The shape of the photoisomer absorption spectrum is very similar to that of the ground state. Triplet state of MC540 in water has been produced by energy transfer from triplet anthracene and displays a broad absorption spectrum between 600 and 700 nm. The triplet state may also be produced by direct excitation of MC540 with UV light. However, when the dye is excited by visible light, no triplet state absorbance in the red could be detected so that the triplet yield of MC540 in water seems to be excitation wavelength dependent.