A Binuclear Zn(II) Complex Giving A Large Fluorescent Response Upon Binding PPi Anion
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Updated: May 22, 2025
A Polyaniline-based Sensor of Nucleic Acids
Published on: November 1, 2016
Joanne Li1, Yonghao Li1, Yi Pang2
1Department of Chemistry, The University of Akron, Akron, OH, 44325, USA.
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 (λmax ≈ 367 nm) and weak blue fluorescence (λem ≈ 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 (Δλmax by ~ 57 nm) and fluorescence (Δλem 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.
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