A New 3D Metal-organic Framework Based on the Four-connecting Cobalt(II) Node Showing Unusual dmp Topology with 3-Fold Interpenetration

The synthesis of polymeric coordination networks or metal–organic frameworks (MOFs) has evoked an enormous amount of recent interest for their intriguing and diverse architectures and for their potential as functional materials with specific properties, such as luminescence, magnetism, absorption, catalysis, ion-exchange, etc.1 From both zeolite chemistry and crystal engineering points of view, the nets built from 4-coordinated (4-c) centers (the tetrahedrally) coordinated divalent cations (M2+ = Zn2+ or Co2+) capture much attention both for their inherent interest (all zeolites are 4-c nets).2 Recently, Keeffe and Yaghi et al.3 have explored the large majority of 3D MOFs with uninodal net topology involving tetrahedral or square-planar nodes (e.g. dia or nob network). Notably, 4-connected nets with mixed connections of both types of nodes (e.g. pts, mog, dmp, asv