Self-assembly of silver polymers based on flexible isonicotinate ligand at different pH values: syntheses, structures and photoluminescent properties

摘要

Two interesting coordination polymers, [Ag-8(IN)(6)(NO3)(2)] 1 and [Ag(lN)(HIN)](1/2) (Ag(IN)]2 (HIN = isonicotinic acid) have been synthesized hydrothermally at different pH values. I crystallizes in the triclinic space group P-1, with a = 10.987(2)angstrom, b = 11.625(2)angstrom, c = 17.323(4)angstrom, alpha = 75.87(3)degrees, beta = 80.87(3)degrees, gamma = 76.50(3)degrees, V = 2074.0(7)angstrom(3) and Z = 2. Compound 1 is the first example of a bilayer framework, in which both single layers are connected by the bond interactions (Ag-O) between Ag from two two-dimensional (21)) single layers generated by the A building block and 0 atoms from one-dimensional (I D) chain constructed by the B building block, in which coordination modes of IN were reported for the first time. 2 crystallizes in the monoclinic space group P2(1)/c, with a = 8.1668(16)angstrom, b = 19.611(4.)angstrom, c = 7.4083(15)angstrom, beta=92.90(3)degrees, V = 1185.0(4) and Z = 4. Compound 2 exhibits a 2D plywood-like structure assembled by hydrogen bonds and weak Ag-O interactions. (c) 2005 Elsevier Inc. All rights reserved.