Controllable Coordination Self‐Assembly Based on Flexible Tripodal Ligands: From Finite Metallocages to Infinite Polycatenanes Step by Step. Issue 4 (6th July 2015)

• Record Type: Journal Article
• Authors: Chen, Qihui; Chen, Lian; Jiang, Feilong; Hong, Maochun
• Is Part Of: Chemical record. Volume 15:Issue 4(2015:Aug.)
• Page Start: 711
• Page End: 727
• Publication Date: 2015-07-06
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/tcr.201402095
• Languages: English
• ISSNs: 1527-8999

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>This article describes the developments in coordination self‐assembly based on flexible tripodal ligands with different metal species. Various finite metallocages such as M<sub>3</sub>L<sub>2</sub>, M<sub>6</sub>L<sub>8</sub>, M<sub>6</sub>L<sub>4</sub>, M<sub>4</sub>L<sub>4</sub> and different catenanes based on discrete metallocages constructed from flexible tripodal ligands with suitable metal species are presented here. Many M<sub>3</sub>L<sub>2</sub> metallocages based on ligands L<sup>1</sup>–L<sup>12</sup> and different two‐coordinated metal species have been prepared, in which various Ag(I) salts and other metal species that have been protected by suitable groups, such as Zn(OAc)<sub>2</sub>, ZnBr<sub>2</sub>, and PdBr<sub>2</sub>, have been used as effective acceptors. All of the M<sub>6</sub>L<sub>8</sub>‐type metallocages are constructed from ligands L<sup>2</sup> or L<sup>12</sup>–L<sup>20</sup> and different four‐coordinated metal species, such as various palladium(II) salts or NiCl<sub>2</sub>, and have similar topological structures. Only a few discrete M<sub>6</sub>L<sub>4</sub>‐type metallocages, based on ligands L<sup>21</sup>–L<sup>24</sup>, have been reported, using different strategies such as protecting groups and steric hindrance. All of the M<sub>4</sub>L<sub>4</sub>‐type cages have similar topological structures and are constructed from ligands L<sup>25</sup>–L<sup>29</sup> with multiple donor sites. More intriguing interlocking ensembles constructed from discrete metallocages are also described here in detail, namely, three [2]catenanes based on ligands L<sup>30</sup>–L<sup>32</sup> and four polycatenanes based on ligands L<sup>33</sup>–L<sup>34</sup>.</p> </abstract>