A Binuclear Zn(II) Complex Giving A Large Fluorescent Response Upon Binding PPi Anion.

Authors

Joanne Li, Yonghao Li, Yi Pang

Published in

Journal of fluorescence. May 21, 2025. Epub May 21, 2025.

Abstract

A binuclear Zn(II)-Zn(II) complex 2b-Zn₂ from a macrocyclic ligand 2b has been shown to be stable in an aqueous solution, exhibiting absorption (λ_max ≈ 367 nm) and weak blue fluorescence (λ_em ≈ 424 nm). The weak fluorescence intensity of the zinc complex could be dramatically increased when the solution was cooled. Upon addition of pyrophosphate ion (PPi), the resulting product gave a large bathochromic shift in both absorption (Δλ_max by ~ 57 nm) and fluorescence (Δλ_em by ~ 106 nm). Spectroscopic studies indicated that the resulting emissive species could be aggregation of the macrocyclic ligand that was accompanied with partial hydrolysis of imine bonds.

PMID:
40397336
Bibliographic data and abstract were imported from PubMed on 21 May 2025.

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