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NH 4 Cd(H 2 O) 2 (BP 2 O 8 )·0.72H 2 O: a New Borophosphate with Abnormal Structure Changes Caused by Hydrogen Interactions
Author(s) -
Ge MingHui,
Liu Wei,
Chen HaoHong,
Li ManRong,
Yang XinXin,
Zhao JingTai
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400551
Subject(s) - octahedron , crystallography , crystal structure , hydrothermal circulation , single crystal , hydrogen bond , metal , chemistry , crystal (programming language) , hexagonal crystal system , materials science , molecule , geology , organic chemistry , seismology , computer science , programming language
A new borophosphate NH 4 Cd(H 2 O) 2 (BP 2 O 8 )·0.72H 2 O has been synthesized under mild hydrothermal conditions. The crystal structure was characterized by single crystal X‐ray diffraction method. Crystal Data: Hexagonal, P 6 5 (No.176), a = 9.6978(16) Å, c = 16.026(4) Å, V = 1305.3(4) Å 3 , Z = 6, R 1 = 0.0256 and wR 2 = 0.0665 for 1409 observed unique reflections and 146 variables. The structure is characterized by corner‐sharing PO 4 and BO 4 tetrahedra, leading to infinite helical {[BP 2 O 8 ] 3− } ribbons, which are connected by CdO 4 (H 2 O) 2 coordination octahedra. Nevertheless, the structure reveals significant difference from its other ammonium containing analogues with respect to the occupations of NH 4 + and the metal cation. The abnormal changes of the unit cells comparing with cadmium borophosphates with other counter cations were presumably due to the anisotropic hydrogen bonds along the c ‐axis or on the ab ‐plane. Its UV‐Vis fluorescence property was investigated for the first time.