A new set of Cd(ii)-coordination polymers with mixed ligands of dicarboxylate and pyridyl substituted diaminotriazine: selective sorption towards CO2 and cationic dyes. Issue 30 (19th July 2017)

• Record Type: Journal Article
• Authors: Chand, Santanu; Elahi, Syed Meheboob; Pal, Arun; Das, Madhab C.
• Is Part Of: Dalton transactions. Volume 46:Issue 30(2017)
• Page Start: 9901
• Page End: 9911
• Publication Date: 2017-07-19
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt01657c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Pyridyl substituted diaminotriazine based three new Cd(ii )-CPs have been synthesized. CP3 showed its potential for CO2 /N2 and CO2 /CH4 separation selectivity and its ability for selective adsorption to a cationic dye. Abstract : On the basis of a mixed ligand system of L(NH2 )2 (6-(pyridin-4-yl)-1, 3, 5-triazine-2, 4-diamine) and dicarboxylic acids, three new Cd(ii ) coordination polymers viz . {[Cd0.5 (tdc)0.5 (L(NH2 )2 )0.5 (H2 O)]·DMF·H2 O} n (1 ), {[Cd0.5 (bdc)0.5 (L(NH2 )2 )(H2 O)]·DMF·H2 O} n (2 ), and {[Cd(ipa)(L(NH2 )2 )(DMF)]·H2 O} n (3 ) (tdcH2 = thiophene-2, 5-dicarboxylic acid, bdcH2 = benzene-1, 4-dicarboxylic acid, ipaH2 = benzene-1, 3-dicarboxylic acid) were synthesized under diverse reaction conditions and characterized by single crystal X-ray diffraction, PXRD, elemental analysis, IR spectroscopy and TGA. While1 and2 revealed 1D chain structures, 3 acquired a 2D square net structural arrangement. Gas adsorption measurements of the desolvated framework3 showed a moderate uptake of CO2 under ambient conditions with good selectivity over N2 and CH4 . The solid state luminescence properties were studied for all three coordination polymers. Moreover, a dye adsorption study on3 exhibited selective adsorption towards a cationic dye.