...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >Encapsulation of water cluster, meso-helical chain and tapes in metal-organic frameworks based on double-stranded Cd(II) helicates and carboxylates
【24h】

Encapsulation of water cluster, meso-helical chain and tapes in metal-organic frameworks based on double-stranded Cd(II) helicates and carboxylates

机译：基于双链Cd（II）螺旋和羧酸盐的金属有机骨架中水簇，中螺旋链和带的封装

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Four new complexes [Cd-4(bpa)(2)(MeCO2)(8)] center dot 9H(2)O ( 1), {[Cd-4(bpa)(4)(suc)(2)(H2O)(4)](suc)(2) center dot 17H(2)O}(n) ( 2), {[Cd-2(bpa)(2)(glu)(2)] center dot 9H(2)O}(n) ( 3), and {[Cd-2(bpa)(2)(adi)(2)] center dot 11H(2)O}(n) ( 4) (where bpa) N, N'-bis(picolinamide) azine, H(2)suc = succinic acid, H(2)glu = glutaric acid, and H(2)adi = adipic acid) have been synthesized by the reactions of the bpa ligand and different Cd( II) carboxylates in similar conditions. Their structures consist of double-stranded helical [Cd-2(bpa)(2)] structural units and various carboxylates. Each of the [Cd-2(bpa)(2)] structural units in 1 is capped at its both ends by acetate-chelated Cd(II) fragments through acetate bridges into discrete tetranuclear species, which are self-assembled into two-dimensional (2D) hydrogen-bonded sheets with cavities. The 2D hydrogen-bonded sheets in 1 are threaded by one-dimensional (1D) water tapes featuring (H2O)(4) clusters to generate an unprecedented three-dimensional (3D) hydrogen-bonded polypseudo-rotaxane architecture. The [C(d)2(bpa)(2)] structural units as secondary building blocks (SBUs) are extended into metal-organic frameworks (MOFs) in 2 and 3 as 1D chains, while in 4 as 2D gridlike sheets by bridging dicarboxylate. These MOFs host meso-helical water chains, (H2O)(32) water clusters, and T4( 1) 4( 2) 6( 2) water tapes, respectively. All of these water morphologies have not been documented so far, and the observations indicate that an SBU and various carboxylate ligands including acetate and alkyl dicarboxylate with different lengths and flexibilities can self-assemble into diverse host frameworks from tetranuclear clusters to 1D chains and ladders, finally to 2D sheets, in which guest water molecules with different morphologies can be tuned to fill the spaces of the host MOFs.
机译：四个新的配合物[Cd-4（bpa）（2）（MeCO2）（8）]中心点9H（2）O（1），{[Cd-4（bpa）（4）（suc）（2）（H2O ）（4）]（suc）（2）中心点17H（2）O}（n）（2），{[Cd-2（bpa）（2）（glu）（2）]中心点9H（2） O}（n）（3）和{[Cd-2（bpa）（2）（adi）（2）]中心点11H（2）O}（n）（4）（其中bpa）N，N' -双（picolinamide）嗪，H（2）suc =琥珀酸，H（2）glu =戊二酸和H（2）adi =己二酸）是通过bpa配体与不同Cd（II ）在类似条件下会发生羧酸盐化反应。它们的结构由双链螺旋[Cd-2（bpa）（2）]结构单元和各种羧酸盐组成。 1中的每个[Cd-2（bpa）（2）]结构单元的两端均被乙酸盐螯合的Cd（II）片段通过乙酸盐桥连接成离散的四核物质，这些物质自组装成二维（2D）具有空腔的氢键合板。 1中的2D氢键合薄片通过具有（H2O）（4）簇的一维（1D）水带穿线，以生成前所未有的三维（3D）氢键合聚伪轮烷结构。 [C（d）2（bpa）（2）]结构单元作为次要构建基块（SBU）在2和3中作为一维链扩展为金属有机框架（MOF），而在4个2D网格状片中通过桥接而扩展二羧酸盐。这些MOF分别承载中螺旋水链，（H2O）（32）水簇和T4（1）4（2）6（2）水带。到目前为止，尚未记录所有这些水的形态，并且观察结果表明，SBU和各种羧酸盐配体（包括乙酸盐和二羧酸烷基酯）具有不同的长度和柔韧性，可以自组装成从四核簇到一维链和梯子的多种宿主骨架，最后是2D图纸，其中可以调整具有不同形态的客体水分子以填充宿主MOF的空间。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号