0D and 1D PbII complexes constructed from pyridyldicarboxamide by varying the ratios of mixed solvent

• The self-assembly of PbAc2 with H2btapca affords different crystal structures.
• Varying the ratio of mixed reaction solvents
• Novel discrete cage structure
• Enhanced fluorescence compared free ligand

By varying the ratio of mixed reaction solvent, the reactions of PbAc2 with N,N′-bis(1,3,4-thiobiazolyl)-2,6-pyridyldicarboxamide (H2btapca) afford two different crystal structures: a novel discrete hexanuclear cage of formula [Pb6(btapca)6]·(H2O)2 (1) and a 1-D double-chain polymer [Pb2(btapca)2(H2O)2]n (2). Fluorescence investigations reveal that both complexes display enhanced emissions in contrast to the free ligand H2btapca.

A discrete hexanuclear cage of [Pb6(btapca)6]·(H2O)2 and a 1-D double-chain polymer [Pb2(btapca)2(H2O)2]n have been assembled by the reactions of PbAc2 with N,N′-bis(1,3,4-thiobiazolyl)-2,6-pyridyldicarboxamide (H2btapca) under different mixed reaction solvents. Both complexes have enhanced fluorescence in contrast to the free ligand.Figure optionsDownload as PowerPoint slide