One-dimensional nanoporous M 2L 2 rhombohedral molecular square with strong blue fluorescent emission

Abstract

The hydrothermal reactions of Zn(ClO 4) 2 · 6H 2O and Cd(ClO 4) 2 · 6H 2O with the ligand N, N ′-bis(pyridylcarbonyl)-4,4 ′-diaminodiphenyl ether (L) afford two one-dimensional (1D) coordination polymers, ([CdL(ClO 4) 2 · (H 2O) 2] · 2H 2O) ( 1) and [ZnL(ClO 4) 2 · (H 2O) 2] · 2H 2O, ( 2) having a nanoporous M 2L 2 rhombohedral molecular square with an approximately accessible cavity of 12.9 × 12.9 ( 1) and 12.7 × 12.7 ( 2) Å without any interpenetrations. Both 1 and 2 are isostructural and display very strong blue fluorescent emission in the solid state at room temperature.