کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1330517 978961 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solvothermal synthesis of a bimetallic thiometallate containing germanium in two oxidation states
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Solvothermal synthesis of a bimetallic thiometallate containing germanium in two oxidation states
چکیده انگلیسی

A new layered germanium–antimony sulphide, [Ge(C2N2H8)3][GeSb2S6], has been prepared at 463 K under solvothermal conditions in the presence of ethylenediamine. The compound has been characterised by single-crystal X-ray diffraction, thermogravimetry, elemental analysis and reflectance spectroscopy. [Ge(C2N2H8)3][GeSb2S6] crystallises in the space group Pbca (a=13.3284(5), b=17.4801(6), c=18.5447(7) Å). The structure consists of cyclic [GeSb2S8]6− units that form chains which are cross-linked through Sb2S2 rings to generate layers of stoichiometry [GeSb2S6]2−, between which [Ge(en)3]2+ cations are located. [Ge(C2N2H8)3][GeSb2S6] contains germanium in both the divalent and tetravalent states. The optical band gap of 2.49(4) eV is in excellent agreement with the value expected on the basis of the correlation with the density of metal centres previously identified for thioantimonates, and is consistent with states at the top of the valence band being predominantly of sulphur 3p character.

[Ge(C2N2H8)3][GeSb2S6] is a mixed valent germanium compound that contains [GeSb2S8]6− units cross linked through Sb2S2 units to generate layers.Figure optionsDownload as PowerPoint slideHighlights
► Preparation and structural characterisation of a new mixed-metal thiometallate.
► Germanium present in two oxidation states.
► Optical band gap of 2.49(4) eV.
► Band gap conforms to a correlation between band gap and density of metal centres.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 184, Issue 12, December 2011, Pages 3144–3149
نویسندگان
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