Synthesis, crystal structures, and luminescent properties of tin(II) and lead(II) carboxyphosphonates with 3D framework structures

摘要

Two new metal carboxyphosphonates with 3D framework structures, [Sn2(HL)·2H2O] (1) and [Pb2Cl(H2L)] (2) (H5L = 4-H00CC6H4CH2N(CH2PO3H2)2), have been synthesized under hydrothermal conditions. For compound 1, every two Sn(1)O3 and Sn(2)O3 polyhedra are linked by CPO3 tetrahedra to form a 2D inorganic layer via corner-sharing in the ic-plane. Then the adjacent layers are further assembled into a 3D supramolecular structure through π- π stacking interactions. Compound 2 features a 3D open-framework structure. The Pb(1 )O5Cl, Pb(2)O5 polyhedra and CPO3 tetrahedra are interconnected into a 2D inorganic layer via corner-sharing in the ac-plane. Such layers are further connected through carboxyphosphonate ligands to form a 3D open-framework structure. The luminescent properties of compounds 1 and 2 have also been studied.