Selective CO2 adsorption in four zinc(ii)-based metal organic frameworks constructed using a rigid N, N′-donor linker and various dicarboxylate ligands. Issue 23 (13th April 2016)

• Record Type: Journal Article
• Authors: Parshamoni, Srinivasulu; Konar, Sanjit
• Is Part Of: CrystEngComm. Volume 18:Issue 23(2016)
• Page Start: 4395
• Page End: 4404
• Publication Date: 2016-04-13
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c5ce02542g
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Four new Zn(ii )-based metal organic frameworks have been synthesized and their adsorption abilities explored towards selective CO2 capture at different temperatures. Abstract : Four new Zn(ii )-based metal organic frameworks (MOFs), namely, [Zn(tdc)(4-bpmh)] n · n (H2 O) (1 ), [Zn(2-NH2 BDC)(4-bpmh)] n · n (EtOH) (2 ), [Zn(NDC)(4-bpmh)] n (3 ) and {[Zn(ADPA)(4-bpmh)(H2 O)](ClO4 )} n · n (MeOH) (4 ) (tdc = 2, 5-thiophene dicarboxylic acid, 2-NH2 BDC = 2-aminoterephthalic acid, NDC = 2, 6-naphthalene dicarboxylic acid, ADPA = adipic acid, 4-bpmh = N, N -bis-pyridin-4-ylmethylene-hydrazine) have been synthesized through the slow diffusion technique using a 4-bpmh linker and different dicarboxylic acids. Structural analysis reveals that compounds1–3 have 3D networks with diamondoid (dia) topologies whereas compound4 has a 2D pillared-trilayer framework with sql/Shubnikov tetragonal plane net topology. Compounds1–2 have 6-fold interpenetrated nets and compound3 is a 7-fold interpenetrated net. Gas adsorption studies reveal that all the compounds1–4 show selective adsorption of CO2 over other gases (N2, CH4 ) at low temperature, and the uptake amount of compound2 is almost double in comparison with those of compounds1, 3 and4 .