Two Novel Cationic Frameworks Based on Cadmium(II) Vinylphosphonate with 4,4′-Bipyridine as Coligand
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The reaction of cadmium nitrate and vinylphosphonic acid (H2L) with 4,4′-bipyridine (bipy) as coligand led to two novel cadmium(II) vinylphosphonates, namely, [Cd4(L)3(NO3)(bipy)4(H2O)3]·(NO3)·3(H2O) (1) and [Cd3(HL)3(L)(bipy)3(H2O)4]·(NO3)·3.5(H2O) (2). Both compounds feature a cationic framework which encloses charge-balanced nitrate anions as well as guest water molecules. They represent the first examples of metal-organic frameworks based on mixed bridging ligands that contain a low-carbon-number alkylphosphonate. Notably, the cationic framework of 2 manifests an unprecedented (4,5)-connected net topology with point symbol of (42·6·83)·(43·65·82)2.
Two novel cationic frameworks based on cadmium(II) vinylphosphonate with 4,4′-bipyridine as coligand are reported here.
KeywordsCadmium Phosphonate-based MOF Crystal structure Topology
This work was supported by the NNSF of China (21061001, 21361002), and the Young Scientists Training Program of Jiangxi Province (20122BCB23020).
Conflict of interests
The authors declare no conflict of interests.
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