Work

Water-stable cobalt(II) coordination polymer and its fluorescence turn-off sensing towards Cr₂O₇2− and 3-nitrotyrosine in aqueous solution

Year: 2026

Type: article

Abstract: In this paper, a two-dimensional Co(II) coordination polymer (CP), {[Co 2 (AAPA) 2 (Bix) 2 (H 2 O)]·2DMF} n (designated as AAPA-Co1 ), was constructed using anthracene-derived organic ligand 5-((anthracen-9-ylmethyl)amino)isophthalic acid (H 2 AAPA), and the auxiliary ligand 1,4-Bis(imidazole- l -ylmethyl)benzene (Bix). The synthesized AAPA-Co1 exhibited excellent thermal stability and chemical stability in aqueous solutions across varying conditions. As anticipated, fluorescence sensing studies revealed that AAPA-Co1 could function as a highly sensitive “turn-off” fluorescence sensor for Cr₂O₇ 2− and 3-nitrotyrosine (3-NT), achieving low detection limits of 0.78 μM and 1.17 μM, respectively. Furthermore, the potential quenching reasons were also systematically investigated.

Source: Polyhedron

DOI: 10.1016/j.poly.2026.118008