Crystals of Sb<SUP>3+</SUP>-coordination complexes exhibiting yellowish green emissions with outstanding lifetimes

초록

Crystals of two antimony(III)-coordination complexes, [Sb(PDC)(HPDC)(H2O)] and [Sb2O(PDC)(2)(H2O)(2)] (PDC = pyridine-2,6-dicarboxylate) have been grown via hydrothermal reactions. Single-crystal X-ray diffraction indicates that [Sb(PDC)(HPDC)(H2O)] and [Sb2O(PDC)(2)(H2O)(2)] reveal pseudo-unidimensional and chain structures, respectively, and are composed of SbO3N2 or SbO4N polyhedra, 2,6-PDC ligand, and H2O. The central Sb3+ cations in both materials are in highly distorted environment attributable to the stereoactive lone pairs on Sb3+ ions. UV-vis diffuse reflectance spectra clearly indicate the introduction of Sb3+ cations into the coordination system through the red-shift of the maximum peaks. Photoluminescence measurements suggest that [Sb2O(PD-C)(2)(H2O)(2)] is a single component yellowish green light emitting material with a remarkable decay lifetime of 8.4 mu s at room temperature.

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