writer：Zhou, JC (Zhou, Jian-Cheng)[ 1 ] ; Zhou, BY (Zhou, Bing-Yao)[ 1 ] ; Ma, XJ (Ma, Xing-Jun)[ 1 ] ; Che
keywords：Ba(II) complex; Crystal structure; Open inorganic-framework; Fluorescence
source：期刊
specific source：JOURNAL OF MOLECULAR STRUCTURE
Issue time：2011年

The first organic-templated Ba(II) perchlorate with open architecture, [(C6H8N)(2)Ba(ClO4)(4 center dot n) (1), has been synthesized in the presence of 3-methylpyridine (3-MP) under hydrothermal conditions. The compound 1 was characterized by single crystal X-ray diffraction, elemental analysis, IR. powder XRD, H-1 NMR, TGA and fluorescence spectra. The 12-coordinate Ba(II) ion was located in the center of the irregular icosahedral (BaO12) cage. Then the icosahedral BaO12 cages andthe ClO4- linkers joined together to form a (4, 4) topology. And the protonated amine molecules were residing in the interlamellar space of the inorganic macro-anionic topology layers in the aAa mode (a = amine, A= anionic layer). The N-H center dot center dot center dot O hydrogen bonds ensure the stability of the structure by mounted the organic molecules to the main body of the inorganic framework. The solid-state fluorescence spectrum of complex 1 exhibits broad emission at 381 nm at room temperature, which is stronger than the free MPP (MPP = 3-methylpyridinium perchlorate). In addition, the two different synthesis methods provide an effectual impetus about applying hydrothermal reaction chemistry to build novel structures. (C) 2011 Elsevier B.V. All rights reserved.