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Divergent Structural Chemistry of Uranyl Borates Obtained from Solid State and Hydrothermal Conditions

机译:从固态和水热条件获得的铀酰硼酸盐的发散结构化学

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摘要

A series of novel uranyl borates, K4Sr4[UO2)(13)(B2O5)(2)(BO3)(2)O-12], A(6)[(UO2)(12)(BO3)(8)O-3](H2O)(6) (A = Rb and Cs), and Rb-3[UO2)(3)(BO3)(2)O(OH)]-(H2O), were synthesized using conventional conditions. Among them, K4Sr4[(UO2)(13)(B2O5)(2)(BO3)(2)O-12] and A(6)[(UO2)(12)(BO3)(8)O-3](H2O)(6) were obtained through a high -temperature solid-state reaction method, whereas RE3[(UO2)(3)-(BO3)(2)O(OH)](H2O) was synthesized via a hydrothermal reaction. All compounds adopt novel two-dimensional (2D) layered structures in which basic building units (BBUs) consist of corner- or edge-sharing UOx (x = 6, 7 and 8) polyhedra linked with planar BO3 triangles or B2O5 dimers. K4Sr4[UO2)(13)(B2O5)(2)(BO3)(2)O-12] is the first mixed alkali-alkaline earth metal uranyl borate. This compound has the most complex 2D anion topology observed thus far in 2D uranyl borates. The fundamental building block (FBB) in this structure, [UO2)(13)(B2O5)(2)(BO3)(2)O-12](12-), consists of 3 UO8 hexagonal bipyramids and 10 UO7 pentagonal bipyramids connected with 2 BO3 triangles and 2 B2O5 dimers. The FBB of Rb-6[(UO2)(12)(BO3)(8)O-3](H-2)(6) is [UO2)(6)(BO3)(4)O-3](6-), comprised of five edg-sharing UO7 pentagonal bipyramids, one UO6 tetragonal bipyramid, and four BO3 triangles. The simplest FBB, [(UO2)(3)(BO3)(2)O-2](4-), occurs in Rb-3[(UO2)(3)(BO3)(2)O(OH)](H2O), where three UO7 pentagonal bipyramids are linked with two BO3 triangles via edge sharing. The aforementioned FBBs are further polymerized into the corresponding infinite uranyl borates layers. The synthetic methods, novel topologies, thermal stability, and spectroscopic properties of these compounds are reported herein.
机译:一系列新型铀硼酸盐,K4SR4 [UO 2)(13)(13)(B2O5)(2)(BO3)(2)O-12],A(6)[(UO 2)(12)(Bo3)(8)O- 3](H 2 O)(6)(A = Rb和Cs)和RB-3 [UO 2)(3)(3)(BO3)(2)O(OH)] - (H 2 O)使用常规条件合成。其中,K4SR4 [(UO 2)(13)(B2O5)(2)(BO3)(2)O-12]和A(6)[(UO 2)(12)(BO3)(8)O-3](通过高效固态反应方法获得H 2 O)(6),而通过水热反应合成RE3 [(UO 2)(3) - (3) - (2)O(OH)](H 2 O)。所有化合物采用新型二维(2D)分层结构,其中基本建筑单元(BBUS)由与平面Bo3三角形或B2O5二聚体连接的角落或边缘共用UOX(x = 6,7和8)多面体。 K4SR4 [UO2)(13)(B2O5)(2)(BO3)(2)O-12]是第一种混合碱碱土金属铀酰硼酸盐。该化合物具有迄今为止在2D铀酰硼酸盐中观察到的最复杂的2D阴离子拓扑。该结构中的基本构建块(FBB)[UO 2)(13)(B2O5)(2)(BO3)(2)O-12](12-),由3个UO8六方双溴酰胺和10个UO7五角形双嘧酰胺组成使用2 BO3三角形和2个B2O5二聚体。 RB-6 [(UO2)(12)(BO3)(8)O-3](H-2)(6)的FBB为[UO 2)(6)(BO3)(4)O-3](6 - )由五个EDG共享UO7五角形双嘧拿铃,一个UO6四方双溴酰胺和四个BO3三角形组成。最简单的FBB,[(UO2)(3)(BO3)(2)O-2](4-)发生在RB-3 [(UO2)(3)(BO3)(2)O(OH)]( H2O),其中三个UO7五角形双嘧拿铃通过边缘共享与两个BO3三角形连接。上述FBBS进一步聚合成相应的无限铀酰基硼酸盐层。本文报道了这些化合物的合成方法,新颖的拓扑,热稳定性和光谱性质。

著录项

  • 来源
    《Crystal growth & design》 |2017年第11期|共10页
  • 作者单位

    Forschungszentrum Julich Inst Energy &

    Climate Res IEK 6 D-52428 Julich Germany;

    Forschungszentrum Julich Inst Energy &

    Climate Res IEK 6 D-52428 Julich Germany;

    Forschungszentrum Julich Inst Energy &

    Climate Res IEK 6 D-52428 Julich Germany;

    Florida State Univ Dept Chem &

    Biochem 95 Chieftan Way Tallahassee FL 32306 USA;

    Jiangsu Higher Educ Inst Sch Radiol &

    Interdisciplinary Sci RAD X Suzhou 215123 Jiangsu Peoples R China;

    Forschungszentrum Julich Inst Energy &

    Climate Res IEK 6 D-52428 Julich Germany;

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  • 正文语种 eng
  • 中图分类 晶体学;
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