کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1506434 | 993794 | 2009 | 6 صفحه PDF | دانلود رایگان |
The metastable phase (phase 1) Zn(OH)2(tp)2 (tp = C8H4O42−) was found to be an intermediate forming during the hydrothermal synthesis of Zn3(OH)4tp (phase 2). Its structure has been determined ab initio from synchrotron powder diffraction data and refined with the Rietveld method: space group P21/c, a = 3.48856(2) Å, b = 5.84645(2) Å, c = 22.1331(1) Å, β = 103.46(1)°, Dx = 2.488 g/cm3, Rp = 0.10, RB = 0.095 (402 independent reflections). The structures of the two analogues were compared. Whereas a mixed coordination of the zinc atoms was found in phase 2, phase 1 exhibits only penta-coordinated Zn(II). Moreover, different optical properties were observed, Zn2(OH)2(tp) showing photoluminescence at 378 nm under λex = 316 nm.
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Journal: Solid State Sciences - Volume 11, Issue 4, April 2009, Pages 818–823