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New alkynyl- and vinyl-linked benzo- and aza-crown etherbipyridyl ruthenium(II) complexes which spectrochemically recognize Group IA and IIA metal cations

journal contribution
posted on 17.01.2013, 14:06 by Paul D. Beer, Oldrich Kocian, Roger J. Mortimer, Christopher Ridgway
A new alkynyl-linked bis(benzo-15-crown-5) bipyridyl ligand and new mono- and bis-benzo-15-crown-5 and aza-15-crown-5 bipyridyl ligands containing trans-conjugated olefinic linkages between the crown ethers and the 4,4′-disubstituted 2,2′-bipyridine (bipy) moieties have been synthesised. The corresponding [RuL(bipy)2][PF6]2 and [RuL3][PF6]2 complexes have been prepared and the latter electropolymerized onto optically transparent conducting glass electrodes. Electronic absorption and fluorescence-emission spectroscopic measurements have demonstrated spectrochemical recognition of Group IA and IIA metal cations by the novel functionalized crown ethers both as solution complexes and as polymeric films. The λmax and ε values for both the low-energy ligand-based π–π* transition and the metal-to-ligand charge transfer band observed for the complexes are sensitive to the binding of sodium and magnesium cations. The spectral measurements further demonstrate the presence of residual unsaturated linkages in the electropolymerized films, providing a technique that could be applied to probe the mechanisms and efficiencies of such electropolymerizations.

History

School

  • Science

Department

  • Chemistry

Citation

BEER, P.D. ... et al, 1993. New alkynyl- and vinyl-linked benzo- and aza-crown etherbipyridyl ruthenium(II) complexes which spectrochemically recognize Group IA and IIA metal cations. Journal of the Chemical Society, Dalton Transactions, 17, pp. 2629 - 2638.

Publisher

© The Royal Society of Chemistry

Version

VoR (Version of Record)

Publication date

1993

Notes

This article is closed access, it was published in the serial Journal of the Chemical Society, Dalton Transactions [© The Royal Society of Chemistry]. The definitive version is available at: http://dx.doi.org/10.1039/dt9930002629

ISSN

0300-9246

Language

en

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