Quantitative
Fluorescent Detection of Pyrophosphate with Quinoline-Ligated Dinuclear
Zinc Complexes
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Abstract
Dinuclear zinc complex [Zn<sub>2</sub>(TQHPN)(AcO)]<sup>2+</sup> exhibits characteristic fluorescence response
(λ<sub>ex</sub> = 317 nm and λ<sub>em</sub> = 455 nm)
toward pyrophosphate (PPi) with maximum fluorescence upon 1:1 Zn<sub>2</sub>(TQHPN)–PPi complex formation. The crystallographic
investigation utilizing P<sup>1</sup>P<sup>2</sup>–Ph<sub>2</sub>PPi revealed that the fluorescent response mechanism is due to intramolecular
excimer formation of two quinoline rings
