Bi[NC5H3(CO2)2](OH2)xF (x=1 and 2): New one-dimensional Bi-coordination materials-Reversible hydration and topotactic decomposition to α-Bi2O3

Two one-dimensional bismuth-coordination materials, Bi[NC5H3(CO2)(2)](OH2)(x)F (x=1 and 2), have been synthesized by hydrothermal reactions using Bi2O3, 2,6-NC5H3(CO2H)(2), HF, and water at 180 degrees C. Structures of the two materials were determined by single-crystal X-ray diffraction. Although they have different crystal structures, both Bi-organic materials shared a common structural motif, a one-dimensional chain structure consisting of Bi3+ cations and pyridine dicarboxylate linkers. Detailed structural analyses include infrared spectroscopy, thermogravimetric analysis, and reversible hydration reactions for the coordinated water molecules were reported. Also, thermal decomposition of the rod-shaped Bi[NC5H3(CO2)(2)](OH2)F single crystals at 800 degrees C led to alpha-Bi2O3 that maintained the same morphology of the original crystals. (C) 2012 Elsevier Inc. All rights reserved.