title: Two three-dimensional lanthanide frameworks exhibiting luminescence increases upon dehydration and novel water layer involving in situ decarboxylation.
abstract: Two three-dimensional polymeric Tb(III) and Yb(III) frameworks, namely, {[Tb3(Hptc)(ptc)(pdc)(H2O)6]·2H2O}n (1) and {[Yb2(ptc)(ox)(H2O)5]·7H2O}n (2) (H4ptc = pyridine-2,3,5,6-tetracarboxylic acid, H2pdc = pyridine-3,5-dicarboxylic acid, ox = oxalate), have been synthesized by a hydrothermal method and characterized by infrared spectra, elemental analysis, powder X-ray diffraction, thermogravimetric analysis, and single-crystal X-ray diffraction. Framework 1 shows an interesting three-dimensional (8,8)-connected net with a Schläfli symbol of (3(3)·4(18)·5(5)·6(2))2(3(6)·4(14)·5(7)·6), while 2 exhibits an unusual (4,8)-connected sqc21 net with a Schläfli symbol of (3(2)·4(2)·5(2))(3(4)·4(8)·5(12)·6(4)). Luminescence studies of 1 reveal that the luminescence intensity increases when the framework is dehydrated.
authors: Department of Chemistry, School of Science, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.
authors: Ai-Hong
authors: AH
authors: Yang
authors: Ji-Yong
authors: JY
authors: Zou
authors: Wen-Min
authors: WM
authors: Wang
authors: Xue-Ying
authors: XY
authors: Shi
authors: Hong-Ling
authors: HL
authors: Gao
authors: Jian-Zhong
authors: JZ
authors: Cui
authors: Bin
authors: B
authors: Zhao
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry*; D018360:Crystallography, X-Ray; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D049449:Luminescence; D008958:Models, Molecular; D014867:Water / Q000737:chemistry*
chemical_list: D002264:Carboxylic Acids; D028581:Lanthanoid Series Elements; D014867:Water