Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 151, Issue 1-3, Pages 67-74Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S1010-6030(02)00030-8
Keywords
Ru(II) complex; photodynamics; calix[4]arenetetrasulfonate; chemosensor
Categories
Ask authors/readers for more resources
A CS4-: (RuB32+)(2) hybrid complex as a new class of a chemosensor was prepared by an ion-exchange reaction, where CS4- and RuB32+ were calix[4]arenetetrasulfonate and a tris(2,2'-bipyridine)ruthenium(II) dication, respectively. In the solid state, one RuB32+ was shown to bury partly in the cavity of CS4- from the upper rim, while other RuB32+ sits near the CS4-:RuB32+ ion-pair to balance the total electric charge of the hybrid. In methanol, on the other hand, two RuB32+ molecules in the hybrid complex located in the vicinity of a CS4- molecule at analogous microenvironments as suggested by H-1-NMR. Spectroscopic and excited-state properties of RuB32+ in the hybrid were influenced by CS4- through the ion-excited dipole interaction and photoinduced electron transfer quenching. In the presence of a foreign cation as a guest, the emission intensity and lifetime of RuB32+ increased, demonstrating that CS4-: (RuB32+)(2) hybrid complex acted as a luminescent chemosensor. The mechanism of ion recognition was discussed in terms of changes in the photophysical properties of the hybrid complex. (C) 2002 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available