Solid State Oxides and Oxyfluorides
固态氧化物和氟氧化物
基本信息
- 批准号:0604454
- 负责人:
- 金额:$ 42万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2006
- 资助国家:美国
- 起止时间:2006-07-01 至 2010-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Non-technicalThe rational design of crystal structures based on the chemical nature of molecular components and functionality is a longstanding and exciting research topic in organic solid state chemistry. Only recently has crystal engineering become an emerging area of inorganic solid state chemistry. With the judicious use of the geochemical and environmental science literature, we continue to develop high yield reactions, control purity, and grow single crystals of new materials that lack inversion symmetry. New materials lacking inversion symmetry (or noncentrosymmetric materials) are the basis of all current and future technologies based on piezoelectricity, pyroelectricity and ferroelectricity. Numerous inventions during the past two decades have been created based on noncentrosymmetric structures. All future advances in this area await the education of a new generation of students capable of the design and synthesis of this special combination of atoms which is required to create noncentrosymmetric materials.Technical Abstract DMRThis project aims to understand how to optimize geometries and the electrostatic potential of metal oxo and oxofluoro-species to create order and avoid disorder in the metal-oxygen and metal-fluoride bonds. The crystal symmetries of the oxyfluorides are determined by the network of contacts the surrounding lattice provides, which are in turn deliberately controlled to create chiral, polar, or chiral-polar three-dimensional solids. Noncentrosymmetric structures are those that lack inversion symmetry. Structures lacking inversion symmetry are a requirement for important current and future technologies that have been created by numerous inventions during the past two decades based on piezoelectricity, pyroelectricity, ferroelectricity and second harmonic generation (SHG). These materials provide a large and new class of solids for studies in basic science associated with the noncentrosymmetric space groups. Stable, robust, high-performance nonlinear optical (NLO) materials with enhanced optical properties at the microscopic and macroscopic level depend on inorganic materials which possess a dipole moment and thus exhibit large optical nonlinearities. These materials are essential for the modification of the amplitude, phase, or frequency of an optical signal. Mixed metal oxide fluorides are a new class of high performance inorganic solid state materials that exhibit polar and chiral (sometimes in combination polar and chiral) structures. Students are trained to carry out semi-combinational syntheses and theoretical modeling studies to guide and advance our program of exploratory synthesis and to achieve high quality single crystals. Crystals are essential for structural studies, characterization and physical measurements of materials which exhibit a nonlinear optical response.
非技术性基于分子组分和功能的化学性质的晶体结构的合理设计是有机固态化学中一个长期而令人兴奋的研究课题。 直到最近,晶体工程才成为无机固态化学的一个新兴领域。 通过明智地使用地球化学和环境科学文献,我们继续开发高产率反应,控制纯度,并生长缺乏反转对称性的新材料的单晶。 缺乏反转对称性的新材料(或非中心对称材料)是所有基于压电性、热电性和铁电性的当前和未来技术的基础。 在过去的二十年中,许多发明都是基于非中心对称结构而产生的。 所有未来的进展,在这一领域等待教育的新一代的学生能够设计和合成这种特殊的组合的原子,这是需要创建noncentralsymmetric materials.Technical Abstract DMR这个项目的目的是了解如何优化几何形状和静电势的金属氧和oxofluoro-物种,以创建秩序,避免无序的金属-氧和金属-氟化物键。氟氧化物的晶体对称性由周围晶格提供的接触网络决定,这些接触网络又被故意控制以产生手性、极性或手性极性三维固体。非中心对称结构是那些缺乏反转对称性的结构。缺乏反转对称性的结构是重要的当前和未来技术的要求,这些技术在过去二十年中由基于压电性、热电性、铁电性和二次谐波产生(SHG)的众多发明创造。这些材料提供了一个大的和新的一类固体在基础科学的研究与非中心对称空间群。在微观和宏观水平上具有增强的光学性质的稳定的、鲁棒的、高性能的非线性光学(NLO)材料依赖于具有偶极矩并且因此表现出大的光学非线性的无机材料。 这些材料对于修改光信号的振幅、相位或频率是必不可少的。 混合金属氧化物氟化物是一类新型的高性能无机固态材料,其表现出极性和手性(有时是极性和手性的组合)结构。 学生接受培训,进行半组合合成和理论建模研究,以指导和推进我们的探索性合成计划,并获得高质量的单晶。 晶体对于表现出非线性光学响应的材料的结构研究、表征和物理测量是必不可少的。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Kenneth Poeppelmeier其他文献
Kenneth Poeppelmeier的其他文献
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{{ truncateString('Kenneth Poeppelmeier', 18)}}的其他基金
Solid-State Oxides and Oxide-Fluorides
固态氧化物和氧化物-氟化物
- 批准号:
1904701 - 财政年份:2019
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
Collaborative Research: Predictive theory, synthesis and characterization of a new type of transparent conductor without doping
合作研究:新型无掺杂透明导体的预测理论、合成和表征
- 批准号:
1806912 - 财政年份:2018
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
Solid-State Oxides and Oxide-Fluorides
固态氧化物和氧化物-氟化物
- 批准号:
1608218 - 财政年份:2016
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
Solid-State Oxides and Oxide-Fluorides
固态氧化物和氧化物-氟化物
- 批准号:
1307698 - 财政年份:2013
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
Third NSF Workshop: The Status of Solid State Chemistry and its Impact in the Physical Sciences; Northwestern University; May 2006
第三届 NSF 研讨会:固态化学的现状及其对物理科学的影响;
- 批准号:
0602701 - 财政年份:2006
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
Solid State Precursors to Oxide Catalysts
氧化物催化剂的固态前体
- 批准号:
9412971 - 财政年份:1994
- 资助金额:
$ 42万 - 项目类别:
Continuing Grant
Compound Precursors to Mixed Metal Oxides
混合金属氧化物的化合物前体
- 批准号:
8915897 - 财政年份:1990
- 资助金额:
$ 42万 - 项目类别:
Continuing Grant
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