کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1331718 1500121 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystal structures and second-order NLO properties of borogermanates
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Crystal structures and second-order NLO properties of borogermanates
چکیده انگلیسی

Borogermanates are a class of very important compounds in materials chemistry. In this paper, the syntheses, structures, and properties of metal borogermanates are reviewed. Organically templated borogermanates with zeolite-like open-frameworks show potential applications as microporous materials. Many compounds in alkali or alkaline-earth borogermanate systems are structurally acentric or polar, some of which exhibit excellent Second Harmonic Generation (SHG) coefficients, wide transparency regions, and high optical-damage thresholds as well as excellent thermal stability. Most of the lanthanide borogermanates are structurally centrosymmetric and not SHG active; however, they are able to emit strong luminescence in visible or near-IR region. In the B-rich compounds, BO3 and BO4 groups can be polymerized into a variety of discrete polynuclear anionic cluster units or extended architectures via B–O–B bridges; whereas in the Ge-rich compounds, GeO4 and GeO6 polyhedra can also be polymerized. The combinations of borate and germinate afforded rich structural and topological types.

Borogermanates are a class of very important compounds in materials chemistry. Both BOx (x=3, 4) and GeOy (y=4, 6) polyhedra can be polymerized into a variety of discrete polynuclear anionic cluster units or extended architectures. The combinations of borate and germanate groups in the same oxide framework not only give rise to a rich structural chemistry, but also afford many polar compounds with good SHG properties.Figure optionsDownload as PowerPoint slideHighlights
► Borogermanates are a class of new materials.
► They feature to be the combination of B and Ge atoms into the same oxide framework.
► They can form a large number of novel 2D and 3D framework structures.
► Some of them are acentric or polar with moderate strong SHG responses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 195, November 2012, Pages 63–72
نویسندگان
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