Three pillared-layered inorganic–organic hybrid polymers with efficient luminescence

Abstract

Three pillared-layered inorganic–organic hybrid polymers, namely, [Cu₂(4,4′-Hbpt)(SCN)₂]_n (1), [Cd(4,4′-Hbpt)(SCN)₂]_n (2), and [Cd(4,4′-Hbpt)(SCN)₂·CH₃CN]_n (3) were synthesized via layer diffusion methods. In all three complexes, there exist 2-D neutral wave-like d¹⁰ metal thiocyanate layers (for 1, [Cu₂(SCN)₂]_n, and for 2 and 3, [Cd(SCN)₂]_n) with (4, 4) topology, which are further connected by bidentate 4,4′-Hbpt ligands to form 3-D structures with the primitive cubic topology. The results of photoluminescence and thermogravimetric analyses indicate that the three complexes are good candidates as luminescent materials. This paper provides a strategy to synthesize a novel family of pillared-layered inorganic–organic hybrid polymers constructed with layered d¹⁰ metal thiocyanate layers and conjugated organic spacers at the molecular engineering level, as well as the discovery of new patterns of crystallization at the crystal engineering level.