Open AccessThermal stability, photochromic sensitivity and optical properties of [Ru(bpy)_2(OSOR)]^+ compounds with R = Bn, BnCl, BnMe
Author(s) -
Volker Dieckmann,
Kristin Springfeld,
Sebastian Eicke,
Mirco Imlau,
Jeffrey J. Rack
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.023495
Subject(s) - photochromism , ligand (biochemistry) , isomerization , photochemistry , thermal stability , materials science , absorption spectroscopy , absorption (acoustics) , chemistry , crystallography , optics , organic chemistry , catalysis , physics , biochemistry , receptor , composite material
The influence of ligand substitution on the photochromic properties of [Ru(bpy)(2)(OSOR)]∙PF(6) compounds (bpy = 2,2'-bipyridine, OSO = 2-methylsulfinylbenzoate) dissolved in propylene carbonate is studied by UV/VIS laser-spectroscopy as a function of temperature and exposure. The group R is either Bn (CH(2)C(6)H(5)), BnCl or BnMe. The photochromic properties originate from a phototriggered linkage isomerization located at the SO ligand. It is shown that the thermal stability of the studied compounds can be varied by ligand substitution in the range of 1.6 × 10(3) s to 3.9 × 10(4) s. In contrast, absorption spectra of ground and metastable states as well as the characteristic exposure of the photochromic response remain unchanged. The results are explained in the frame of photoinduced linkage isomerization located at the SO ligand.