About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
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Presentation Title |
Metal Organic Framework Compound, [Ni(4,4’-bipyridine)Ni(CN)4]n, Based on Pillared Cyanonickelate (PICNIC) Architecture |
Author(s) |
Winnie K. Wong-Ng, Jeffrey T Culp, Yu-Sheng Chen, Daniel W Siderius, Lan Li |
On-Site Speaker (Planned) |
Winnie K. Wong-Ng |
Abstract Scope |
Hofmann-related compounds based on the pillared cyano-bridged architecture, [Ni(L)Ni(CN)4]n (L = pillar organic ligands), or known as PICNICs, could be rigid or dynamic metal organic frameworks (MOF) depending on the choice of pillar organic ligands. We found that when L=4,4’-bipyridine, in addition to the 3D compound [Ni(4,4’-bipyridine)Ni(CN)4]n) (with DMSO as solvent), a 2D non-porous [Ni(CN)4Ni(C10H8N2)(NH3)2] (orthorhombic Pnnm) compound also co-existed. The 2D compound features a metal organic cyanide-bridged layered framework, while the 3D material (orthorhombic Pccn) was found to consist of a network built from extended 2-D [Ni(CN)4] layers. These layers are connected to each other via the Bpy ligands at the six-fold coordinated Ni2 site while Ni1 has a four-fold coordination environment. Powder samples of the 3D compound (without DMSO) exhibit Type-I CO2 sorption characteristics. The absence of a hysteresis loop (gating behavior) of the sorption curves indicates that it is not likely to be a flexible MOF. |