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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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - A Tripodal Ruthenium(II) Polypyridyl Complex with pH Controlled Emissive Quenching
AU - Brown, Rodney T.
AU - Fletcher, Nicholas Charles
AU - Danos, Eleftherios
AU - Halcovitch, Nathan Ross
N1 - 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.
PY - 2019/1/10
Y1 - 2019/1/10
N2 - 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
AB - 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
KW - Bipyridine
KW - pH Sensor
KW - Podand
KW - Ruthenium
KW - Tripodal ligands
U2 - 10.1002/ejic.201800891
DO - 10.1002/ejic.201800891
M3 - Journal article
VL - 2019
SP - 110
EP - 117
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
SN - 1434-1948
IS - 1
M1 - EJIC.201800891
ER -