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

Brown, Rodney T. and Fletcher, Nicholas Charles and Danos, Eleftherios and Halcovitch, Nathan Ross (2019) A Tripodal Ruthenium(II) Polypyridyl Complex with pH Controlled Emissive Quenching. European Journal of Inorganic Chemistry, 2019 (1). pp. 110-117. ISSN 1434-1948

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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

Item Type:
Journal Article
Journal or Publication Title:
European Journal of Inorganic Chemistry
Additional Information:
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.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600/1604
Subjects:
ID Code:
128929
Deposited By:
Deposited On:
12 Nov 2018 11:24
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Sep 2020 04:56