Flexible and Redox-Active Coordination Polymer: Control of the Network Structure by Pendant Arms of a Macrocyclic Complex

✍ Scribed by Hoi Ri Moon; Myunghyun Paik Suh

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 895 KB
• Volume: 2010
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.201000555

✦ Synopsis

Abstract

The coordination polymer {[Ni(C~20~H~32~N~8~)]~2~[TCM]}·5DMF·8H~2~O (1) has been assembled from a Ni^II^ macrocyclic complex that contains two pyridyl pendant arms, Ni(C~20~H~32~N~8~)~2~, and sodium tetrakis[4‐(carboxyphenyl)oxamethyl]methane (Na~4~TCM) in DMF/water. The X‐ray structure of 1 reveals that the pyridyl pendant arms in the macrocyclic complex play a crucial role in determining the network structure through the π–π interactions. Compound 1 forms doubly catenated rhombic grids that generate 1D channels. It exhibits flexible behavior upon desorption/resorption and exchange of organic guest molecules as well as temperature change. Solid 1 is redox active due to the incorporated Ni^II^ macrocyclic species, and reacts with Pd(NO~3~)~2~ dissolved in acetonitrile at room temperature to produce small Pd nanoparticles [(2.9 ± 0.4) nm in diameter] in the channels in the absence of extra reducing or capping agents.