Issue 13, 2012
From the journal:

RSC Advances

Ionic radius-dependent self-assembly of closed/opened molecular capsules based on pentacyclopentanocucurbit[5]uril†

Ying-Feng Hu,ab   Kai Chen,b   Rui-Lian Lin,a   Wen-Qi Sun,a   Jing Zhu,a   Jing-Xin Liu,*a   Sai-Feng Xue,b   Qian-Jiang Zhub  and  Zhu Tao*b  

* Corresponding authors

a College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan, China
E-mail: jxliu411@ahut.edu.cn (J.-X. Liu)
Fax: 86-555-2311552

b Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, P. R. China
E-mail: gzutao@263.net (Z. Tao)
Fax: 86-851-3620906

Abstract

Three coordination architectures, namely, {Ca2(H2O)4[(NO3)⊂Q*[5]]}2(NO3)6·26H2O (1), {Sr2(H2O)3(NO3)[(NO3)⊂Q*[5]]}(NO3)2·7H2O (2), {Ba(H2O)[(H2O)2 ⊂ Q*[5]]}–(NO3)2·11H2O (3), have been synthesized by reactions of the corresponding alkaline-earth metal salts with pentacyclopentanocucurbit[5]uril (Q*[5]). These compounds were characterized by single-crystal X-ray diffraction studies, showing that the ionic radius of the alkaline-earth metal plays a crucial role in determining which type of molecular capsule forms. Compound 1 is an incompletely closed molecular capsule, compound 2 corresponds to a closed molecular capsule, and compound 3 resembles an opened molecular capsule. The thermogravimetric analysis (TGA) of compound 2 was also characterized.

Graphical abstract: Ionic radius-dependent self-assembly of closed/opened molecular capsules based on pentacyclopentanocucurbit[5]uril

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Article information

DOI
https://doi.org/10.1039/C2RA20569F
Article type
Paper
Submitted
28 Mar 2012
Accepted
16 Apr 2012
First published
18 Apr 2012

RSC Adv., 2012,2, 5663-5668

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Ionic radius-dependent self-assembly of closed/opened molecular capsules based on pentacyclopentanocucurbit[5]uril

Y. Hu, K. Chen, R. Lin, W. Sun, J. Zhu, J. Liu, S. Xue, Q. Zhu and Z. Tao, RSC Adv., 2012, 2, 5663 DOI: 10.1039/C2RA20569F

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