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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (3): 382-387. 上一篇    下一篇

研究论文

Ge_10O_28单元构建的两个三维锗酸盐结构：（H_3O)_4Ge_7O_16·3H_2O和K_4Ge_9O_20

周亚明;刘志城;陈珍霞;翁林红;赵东元   

  1. 复旦大学
  • 发布日期:2003-03-15

(H_3O)_4Ge_7O_(16)'3Hk_2O and K_4Ce_9O_(20): Two Microporous Germanates Constructed by Ge_(10O_(28) Units

Zhou Yaming;Liu Zhichen;Chen Zhenxia;Weng Linhong;Zhao Dongyuan   

  1. Department of Chemistry,Fudan University
  • Published:2003-03-15

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在半水溶剂热条件下，采用不同的合成条件合成了两个锗酸盐微孔分子筛：（ H_3单晶结构解析表明，两个晶体结构具有相同的"火箭状"二级结构单元（SBU）， SBU的不同的连接方式导致了完全不间结构．H_4Ge_7O_(16)·7H_2O的结晶学数据 为M_r=894 ．27，Pλ=O．071073nm，R（F）=3．48％，wR（F~2）＝8．39％． K_4Ge_9O_(20)的结晶学数据为C=0.7383（2）nm，V=16618（7）nm~3，Z＝4，Mo Ka，R（F）=3．92%,wR(F~2)=11.97%.

关键词: 锗酸盐, 分子筛, 单晶, 晶体结构

Quasi-solvothennal syntheses and X-ray crystal structures of two germanates (H_3O)_4Ge_7O_(16)'3Hk_2O and K_4Ce_9O_(20) are presented. Although both structures are built up from the same rock-like secondary building units (SBUs) Ge_(10)O_(28), the frameworks are different because of the different connect manners of SBUs. Crystal data for H_4Ge_7H_2O: M_r = 894.27, space group P-43m, a=0.77309(18) ran, V = 0.46205(19) nm~3, Z = l, Mo Ka, λ=0.071073 nm, R(F) =3.48%, wR(F~2) =8.39% for 20 parameters and 228 reflections with I>2a(l). Crystal data for K_4Ce_9O_(20),: M_r = 1129.71, space group 14(l)/a, a = 1.5002(3) nm, c= 0.7383(2) nm, V= 1.6618(7) nm~3, Z = 4, MoKa, R(F) =3.92%, wR(F~2} = 11.97% for 75 parameters and 922 reflections with I>2a(I).

Key words: GERMANATE, MOLECULAR SIEVE, SINGLE CRYSTALS, CRYSTAL STRUCTURE

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