Synthesis and characterization of novel barium iron phosphates: Insight into new structure types tailored by hydrogen atoms

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• 作者：Li-Zhi Sun^a ; ^{tslz2007@163.com" class="auth_mail} ; Wei Sun^a ; ^{421221789@qq.com" class="auth_mail} ; Wei-Jian Ren^a ; ^{935428502@qq.com" class="auth_mail} ; Jia-Ying Zhang^a ; ^{1152807849@qq.com" class="auth_mail} ; Ya-Xi Huang^a ; ^{yaxihuang@xmu.edu.cn" class="auth_mail} ; Zhi-Mei Sun^a ; ^{zmsun@xmu.edu.cn" class="auth_mail} ; Yuanming Pan^b ; ^{yuanming.pan@usask.ca" class="auth_mail} ; Jin-Xiao Mi^a ; ^{jxmi@xmu.edu.cn" class="auth_mail} ; ^{jx_mi@163.com" class="auth_mail}
• 关键词：Water activities ; Very strong hydrogen bond ; Iron phosphate ; Depolymerization ; Crystal structure tailored
• 刊名：Journal of Solid State Chemistry
• 出版年：April, 2014
• 年：2014
• 卷：212
• 期：Complete
• 页码：48-57
• 全文大小：1665 K

文摘

A significant gap in our knowledge of phosphate crystal chemistry is the lack of understanding of what controls the depolymerization of [PO₄] tetrahedra. A new route using phosphoric acid without any added water at 240 掳C has been developed to synthesize two new compounds Ba₂Fe₂[H(PO₃OH)₂][H(P₂O₇)₂] and Ba₂Fe[H(P₂O₇)₂], as well as a new polymorph 尾-BaFe₂(P₂O₇)₂ from annealing the former at 鈮?00 掳C. Structural characterizations show that Ba₂Fe₂[H(PO₃OH)₂][H(P₂O₇)₂] features a novel 2D ²_{鈭?/sub>{[Fe2[H(PO3OH)2][H(P2O7)2]]^{4鈭?/sup>} layer structure containing both hydrogen-diphosphate [H(P2O7)2] and hydrogen-monophosphate [H(PO3OH)2] groups, whereas Ba2Fe[H(P2O7)2] and 尾-BaFe2(P2O7)2 possess an 1D chain structure and a 3D framework structure, respectively. These structures support a control of hydrogen on the depolymerization of [PO4] groups and our work opens a new way for the synthesis of other novel phosphates using controlled water activities.}}