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Coordination properties of a diarylaza crown ether appended with a luminescent [Ru(bipy)3]2+ unit

Lookup NU author(s): Craig Sams, Emeritus Professor Anthony Harriman

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Abstract

The [Ru(bipy)2(1)](PF6)2 (bipy refers to 2,2′-bipyridine) complex, comprising a ruthenium(II) tris(2,2′-bipyridine) luminophore covalently linked to a di[(o-triethyleneglycoxy)phenyl]amine crown ether 1, has been synthesized and fully characterized. The photophysical properties of this metal complex have been examined in solution at ambient temperature. Luminescence from the metal complex is enhanced significantly in the presence of various adventitious cations, including protons. In particular, Li+ cations bind to the crown ether, as evidenced by 1H NMR and luminescence spectroscopy. Cation binding serves to decrease the rate of reductive quenching of the triplet state of the metal complex, thereby increasing the extent of luminescence. The solution-phase conformation of [Ru(bipy)2(1)](PF6)2, with and without encapsulated Li+, has been examined by 2-D NMR and by molecular dynamics simulations.

Publication metadata

Author(s): Charbonniere LJ, Ziessel RF, Sams CA, Harriman A

Publication type: Article

Publication status: Published

Journal: Inorganic Chemistry

Year: 2003

Volume: 42

Issue: 11

Pages: 3466-3474

ISSN (print): 0020-1669

ISSN (electronic): 1520-510X

Publisher: American Chemical Society

URL: http://dx.doi.org/10.1021/ic020671t

DOI: 10.1021/ic020671t

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