Layer-structured coordination polymers based on 5-(1H-tetrazol-5-yl)isophthalic acid: structure, sensitization of lanthanide(iii) cations and small-molecule sensing

Abstract

Three layer-structured coordination polymers (CPs), namely, [Pb₂(TZI)(μ₃-OH)(H₂O)·(H₂O)]_n (1), [Pb(HTZI)(phen)·(H₂O)]_n (2) and [Zn₂(TZI)(μ₃-OH)(H₂O)₂·(1/2H₂O)]_n (3) have been constructed from the 5-(1H-tetrazol-5-yl)isophthalic acid (H₃TZI) ligand. Notably, 1 can function as a host for the encapsulation of lanthanide(III) ions by encapsulating different Ln³⁺ ions. As-prepared Ln³⁺@1 materials show tunable luminescent emission including white-light emission. Moreover, 1 exhibits highly luminescent sensing properties for small organic molecules.