Selective recognition of fluoride and acetate by a newly designed ruthenium framework: experimental and theoretical investigations

Dalton Transactions : an International Journal of Inorganic Chemistry
Tanaya KunduGoutam Kumar Lahiri

Abstract

An effective anion sensor, [Ru(II)(bpy)(2)(H(2)L(-))](+) (1(+)), based on a redox and photoactive {Ru(II)(bpy)(2)} moiety and a new ligand (H(3)L = 5-(1H-benzo[d]imidazol-2-yl)-1H-imidazole-4-carboxylic acid), has been developed for selective recognition of fluoride (F(-)) and acetate (OAc(-)) ions. Crystal structures of the free ligand, H(3)L and [1](ClO(4)) reveal the existence of strong intramolecular and intermolecular hydrogen bonding interactions. The structure of [1](ClO(4)) shows that the benzimidazole N-H of H(2)L(-) is hydrogen bonded with the pendant carboxylate oxygen while the imidazole N-H remains free for possible hydrogen bonding interaction with the anions. The potential anion sensing features of 1(+) have been studied by different experimental and theoretical (DFT) investigations using a wide variety of anions, such as F(-), Cl(-), Br(-), I(-), HSO(4)(-), H(2)PO(4)(-), OAc(-) and SCN(-). Cyclic voltammetry and differential pulse voltammetry established that 1(+) is an excellent electrochemical sensor for the selective recognition of F(-) and OAc(-) anions. 1(+) is also found to be a selective colorimetric sensor for F(-) or OAc(-) anions where the MLCT band of the receptor at 498 nm is red shifted to 538 nm in...Continue Reading

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Citations

Jun 7, 2013·Medicinal Research Reviews·Ling ZhangCheng-He Zhou
Mar 26, 2014·Chemical Reviews·Ying ZhouJuyoung Yoon
Dec 20, 2014·Chemistry : a European Journal·Inke Siewert, Joanna Gałęzowska
Jun 27, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Ankita DasGoutam Kumar Lahiri
Jan 7, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Ankita DasGoutam Kumar Lahiri
Dec 2, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Yuhan ZhouJingping Qu
Nov 29, 2012·Chemical Society Reviews·Massimo Cametti, Kari Rissanen
Aug 3, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Ankita DasGoutam Kumar Lahiri
May 26, 2018·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Aditya Kumar PurohitPravin Kumar Kar
Mar 4, 2015·Acta Crystallographica. Section C, Structural Chemistry·Ivan Bernal, Steven Watkins
Nov 9, 2019·Inorganic Chemistry·Sahidul MondalPradyut Ghosh

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