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    Rights statement: This is the peer reviewed version of the following article: Brown, R. T., Fletcher, N. C., Danos, L. and Halcovitch, N. R. (2019), A Tripodal Ruthenium(II) Polypyridyl Complex with pH Controlled Emissive Quenching. Eur. J. Inorg. Chem., 2019: 110-117. doi:10.1002/ejic.201800891 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/EJIC.201800891 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

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A Tripodal Ruthenium(II) Polypyridyl Complex with pH Controlled Emissive Quenching

Research output: Contribution to journalJournal article

Published
Article numberEJIC.201800891
<mark>Journal publication date</mark>10/01/2019
<mark>Journal</mark>European Journal of Inorganic Chemistry
Issue number1
Volume2019
Number of pages8
Pages (from-to)110-117
Publication statusPublished
Early online date8/11/18
Original languageEnglish

Abstract

A tripodal podand has been prepared and complexed to ruthenium(II) creating a metal complex with C3-symmetry and an enclosed cavity. The complex shows the anticipated enhanced emission when compared to [Ru(bipy)3]2+ in acetonitrile. The emission from this cryptand like structure is invariant to the introduction of monovalent cations in aqueous solution, but a significant drop in the emission was observed with increasing pH over a very broad pH range (3 to 12). This is attributed to an N to t2g electron transfer in the excited-state in the unprotonated form with a transfer rate of the order of 4.2 x 105 s-1. The crystal structure indicates the inclusion of water within the cavity suggesting that the protonation of a tertiary amine can be effectively moderated by a water molecule held in close proximity within a rigid cavity

Bibliographic note

This is the peer reviewed version of the following article: Brown, R. T., Fletcher, N. C., Danos, L. and Halcovitch, N. R. (2019), A Tripodal Ruthenium(II) Polypyridyl Complex with pH Controlled Emissive Quenching. Eur. J. Inorg. Chem., 2019: 110-117. doi:10.1002/ejic.201800891 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/EJIC.201800891 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.