Synthesis, characterization, spectroscopic, and electrochemiluminescence properties of a solvatochromic azacrown-containing cyanoruthenate(II): potential applications in separation and indirect photometric detection of cations and amino acids in HPLC

Chemistry : a European Journal
Mei-Jin LiVivian Wing-Wah Yam

Abstract

A new anionic ruthenium(II) complex, (Et4N)[Ru(tpyA18C6)(CN)3] (tpyA18C6=N-[4'-(2,2':6',2''-terpyridyl)]-1,4,7,10,13-pentaoxa-16-azacyclohexadodecane), has been synthesized and characterized. The complex was found to show pronounced solvatochromic behavior and, when dissolved in solution, changed its color from purple to yellow when the solvent system was varied from pure acetonitrile to pure water. Its absorption and emission energies in various solvents showed a linear dependence of the Gutman's acceptor number. The characteristic photoluminescence and electrochemiluminescence (ECL) of the complex were also found to be progressively quenched as the proportion of water in a water/acetonitrile mixture increased. Large changes in the chemical shifts of the 1H NMR and 13C NMR signals of [Ru(tpyA18C6)(CN)3]- in different solvents were observed. The complex has also been demonstrated to serve as a mobile-phase additive in high-performance liquid chromatography for separation of metal cations and amino acids. Comparison studies with the crown-free analogue, (Et4N)[Ru(tpy)(CN)3] (tpy = 2,2':6',2''-terpyridine), showed that other than the ion-pair effect, the allosteric host-guest interaction provided by the presence of the pendant cr...Continue Reading

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Citations

Jan 21, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Shyamal DasSujoy Baitalik
Oct 5, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Chanchal BhaumikSujoy Baitalik
Feb 12, 2013·Chemical Communications : Chem Comm·Larry Tso-Lun LoChi-Chiu Ko
Dec 19, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Ying ChenMartin M F Choi
Jun 25, 2021·Chemical Science·Xinyi Ye, Choon-Hong Tan

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