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

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