A fluorescence chemosensor for benzonitrile derived from in-situ synthesis of azolate–carboxylic acid and zinc(II) ions

• A 2D sql topological zinc(II) homometallic coordination polymer has been obtained via an in-situ synthetic approach.
• This coordination polymer is a promising fluorescence chemosensor for benzonitrile.

A new zinc(II) homometallic coordination polymer (CP), {[Zn(TAA-OH)2] · 1.5H2O}n (1) (HTAA-OH = 2-(5-hydroxy-1H-1,2,4-triazole-1-yl) acetic acid) has been synthesized via an in-situ synthetic approach and structurally characterized in detail. In 1, the HTAA-OH ligand is generated in-situ by the nucleophilic addition of 2-(1H-1,2,4-triazole-1-yl) acetic acid. CP 1 features a 2D structure with sql topology, where the neighboring Zn(II) ions are bridged through two oxygen atoms of carboxyl group and two nitrogen atoms of triazole from the HTAA-OH ligands. Luminescence study shows that 1 dispersed in acetonitrile performs a distinct luminescence enhancing effect upon addition of benzonitrile, indicating that 1 is a promising fluorescence chemosensor for benzonitrile.

A 2D sql topological zinc(II) homometallic coordination polymer via an in-situ synthetic approach was synthesized and fully characterized. Luminescence performance reveals that this coordination polymer is a promising fluorescence chemosensor for benzonitrile.Figure optionsDownload as PowerPoint slide