A two-dimensional flexible porous coordination polymer based on Co(II) and terpyridyl phosphine oxide

作者：Feng, Juan^*; Li, Hongmiao; Yang, Qiuli; Wei, Shi Chao; Zhang, Jianyong; Su, Cheng Yong

来源：Inorganic Chemistry Frontiers, 2015, 2(4): 388-394.

DOI：10.1039/c4qi00138a

Two porous coordination polymers, Co-Py2PO and Co-Py2PO', have been obtained via reactions of in situ oxidized terpyridyl phosphines and cobalt(II) nitrate. Single-crystal structure analysis reveals that Co-Py2PO' has a three-dimensional (3D) structure with (8.10(2))(8(3)) net topology, while the structural analysis of Co-Py2PO reveals a 2D polycatenated framework consisting of two sets of parallel 2D networks of (6(3)) net topology. For Co-Py2PO', guest CHCl3 molecules are locked in the channels along the b axis by P(O)Ph-2 phenyl rings and coordinated nitrate ions, and cannot be released out of the host framework. In contrast, the as-synthesized 2D framework Co-Py2PO readily loses its solvated guest molecules to give an activated amorphous material for sorption. Activated Co-Py2PO has a flexible structure and shows dynamic adsorption behaviours towards various guests (N-2 and benzene). The flexibility may arise from the combination of layer-layer motion and the local flexibility of the P-C bond of -P(O) Ph-2 groups.

• 出版日期2015
• 单位中山大学