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Title: Selective CO2 uptake in a bi-pillared layer 3D metal-organic framework of Zn(II)
Authors: Haldar, Ritesh
Narayan, Raghu Pradeep
Maji, Tapas Kumar
Keywords: Metal organic frameworks
Selective CO2 adsorption
Polar pore surface
Solvent vapour adsorption
Issue Date: Sep-2012
Publisher: NISCAIR-CSIR, India
Abstract: A new two-fold interpenetrated 3D bi-pillared framework, {[Zn(1,4-bdc)(azbpy)]∙DMF}n (1), where 1,4-bdc = 1,4-benzene dicarboxylic acid, azbpy = 4,4′- azobipyridine and DMF = N,N-dimethyl formamide, has been synthesized from a mixed ligand system and characterized by single crystal as well as powder X-ray diffraction and thermogravimetric analysis. The metal center, Zn(II), having a trigonal bi-pyramidal geometry, is connected to the three different 1,4-bdc linkers in the equatorial positions while the axial positions are occupied by the two different 4,4′-azbpy pillars. The framework contains one-dimensional rectangular shaped channels along the c axis and the channel surfaces are decorated with the nitrogen atoms of –N=N- functional group from azbpy ligand. The desolvated framework has a specific surface area of ~ 40 m2 g-1 and shows excellent selective uptake of CO2 at 195 K among other small gases like Ar, N2 and H2- (1) also adsorbs acetonitrile and benzene solvent vapors at 298 K.
Page(s): 1231-1237
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.51A(09-10) [September-October 2012]

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