Variation of structures of coordination polymers of Ca(II), Sr(II), and Ba(II) with a tripodal ligand: Synthesis, structural, and gas adsorption studies

Neogi S; Navarro JAR; Bharadwaj PK

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Variation of structures of coordination polymers of Ca(II), Sr(II), and Ba(II) with a tripodal ligand: Synthesis, structural, and gas adsorption studies

机译：带有三脚架配体的Ca（II），Sr（II）和Ba（II）配位聚合物结构的变化：合成，结构和气体吸附研究

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The podand ligand tris-{2-(4-carboxyphenoxy)ethyl)amine (ptaH(3)) readily reacts with Ca(II), Sr(II), and Ba(II) nitrates in a water-THF mixture at room temperature to afford {[Ca(ptaH)(H2O)]center dot 6H(2)O}(n), 1, {[Sr(ptaH)(H2O)(3)]center dot 6H(2)O)N, 2, and [[Ba-(ptaH)(H2O)]center dot H2O}(n), 3. The crystallographic studies performed on these systems revealed that their structures are based on infinite chains of interlinked metallocycles which give rise to open frameworks with the pores being filled with hydration water molecules. The XRPD experiments performed after solvent removal upon heating are consistent with framework stability for 1 and a structural change for 2 and 3. The solid-gas adsorption measurements performed on 1 agree with the typical behavior of an ultramicroporous material in which the N, molecules are not able to diffuse through its porous framework at 77 K; however appreciable amounts of CO) are readily incorporated at 293 K. By contrast, compounds 2 and 3 do not adsorb either N-2 molecules at 77 K or CO2 at 293 K, which is indicative of framework collapse upon solvent removal.

机译：豆荚配体三（2-（4-羧基苯氧基）乙基）胺（ptaH（3））在室温下容易与水-THF混合物中的Ca（II），Sr（II）和Ba（II）硝酸盐反应得到{[Ca（ptaH）（H2O）]中心点6H（2）O}（n），1，{[Sr（ptaH）（H2O）（3）]中心点6H（2）O）N，2 ，和[[Ba-（ptaH）（H2O）]中心点H2O}（n），3。在这些系统上进行的晶体学研究表明，它们的结构基于相互连接的金属环的无限链，从而形成了带有开放链的金属骨架。孔中充满了水合水分子。加热去除溶剂后进行的XRPD实验与1的骨架稳定性以及2和3的结构变化一致。在1上进行的固体气体吸附测量结果与超微孔材料的典型行为相符，其中N，分子为在77 K时无法通过其多孔结构扩散;然而，在293 K时很容易引入相当数量的CO。）相反，化合物2和3既不吸附77 K的N-2分子也不吸附293 K的CO 2，这表明去除溶剂后骨架塌陷。

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《Crystal growth & design》 |2008年第5期|共5页
作者
Neogi S; Navarro JAR; Bharadwaj PK;
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正文语种 eng
中图分类晶体学;
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METAL-ORGANIC FRAMEWORKS; SORPTION PROPERTIES; HYDROGEN STORAGE; SURFACE-AREA; SITES; H-2;

机译：金属有机框架;吸附性能;储氢;表面面积;部位;H-2;

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1. Variation of structures of coordination polymers of Ca(II), Sr(II), and Ba(II) with a tripodal ligand: Synthesis, structural, and gas adsorption studies [J] . Neogi S, Navarro JAR, Bharadwaj PK Crystal growth & design . 2008,第5期

机译：带有三脚架配体的Ca（II），Sr（II）和Ba（II）配位聚合物结构的变化：合成，结构和气体吸附研究
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Variation of structures of coordination polymers of Ca(II), Sr(II), and Ba(II) with a tripodal ligand: Synthesis, structural, and gas adsorption studies

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