posted on 2013-10-07, 00:00authored byHuiqing Ma, Di Sun, Liangliang Zhang, Rongming Wang, Vladislav A. Blatov, Jie Guo, Daofeng Sun
A new
type of 3D “strongly” self-catenated metal–organic
framework (<b>SDU-9</b>) has been constructed from [Cu<sub>2</sub>(COO)<sub>4</sub>] paddlewheel secondary building units and a tripodal
carboxylate linker. <b>SDU-9</b> ([Cu<sub>6</sub>(H<sub>2</sub>O)<sub>6</sub><b>L</b><sub>4</sub>]·24H<sub>2</sub>O,
where [H<sub>3</sub><b>L</b> = 4,4′,4″-(hydroxysilanetriyl)tris(triphenyl-4-carboxylic
acid), represents a rare example of a highly symmetrical coordination
network and extremely tight self-catenation. To the best of our knowledge, <b>SDU-9</b> has the highest topological density among all known
3,4-coordinated nets.