Synthesis and Characterization of Novel Metal Oxides

9805881 Jacobson该项目涉及具有分层和骨架结构的过渡金属系统的合成和性质。 提出了三个研究领域：1）不对称层结构;薄膜和单晶形式的新化合物的合成，以及它们的物理特性（例如，光学）性质; 2）使用基于水热合成和配位化学的方法合成具有用于吸附的开放框架的结构; 3）在水热条件下利用电结晶（一种新的合成技术）来制备新化合物和薄晶体膜。 具有不对称层的层状化合物在相邻层之间没有对称中心的情况下堆积是极其罕见的。 它们是特别有趣的，因为它们的潜力，表现出非线性光学特性。 具有低骨架密度的开放骨架结构的合成的进一步发展将集中在与铌氧化物的结构拓扑相关的结构上。 将使用两种不同的方法来构建这些大框架，一种基于配位聚合物，另一种基于金属磷酸盐。 水热条件下的电结晶领域为合成多晶、单晶和薄膜形式的新化合物提供了不同寻常的机会。毫无疑问，新的合成技术和构建无机骨架的新策略的结合将导致新的化合物家族，其中一些预计将具有新的和不寻常的物理性质或化学活性。

9805881JacobsonThe project involves the synthesis and properties of transition metal systems with layered and framework structures. Three areas are proposed for study: 1) asymmetric layer structures; synthesis of new compounds in thin film and single crystal form, and full characterization of their physical (e.g., optical) properties; 2) synthesis of structures with open frameworks for sorption using approaches based on both hydrothermal synthesis and coordination chemistry; 3) the utilization of electrocrystallization under hydrothermal conditions (a new synthesis technique) for the preparation of new compounds and thin crystalline films. Layered compounds with asymmetric layers that pack without a center of symmetry between adjacent layers are extremely unusual. They are particularly interesting because of their potential to exhibit nonlinear optical properties. The further development of the synthesis of open framework structures with low framework densities will be focused on structures that are topologically related to the structure of Niobium Oxide. Two different approaches will be used to construct these large frameworks, one based on coordination polymers and the other on metal phosphates. The area of electrocrystallization under hydrothermal conditions offers unusual opportunities for the synthesis of new compounds in the form of polycrystals, single crystals and thin films.% % % The combination of new synthesis techniques and new strategies for building inorganic frameworks will undoubtedly lead to new families of compounds, some of which it is anticipated will have new and unusual physical properties or chemical activity.***