Coordination polymers from a flexible alkyldiamine-derived ligand. Issue 34 (17th August 2017)

• Record Type: Journal Article
• Authors: Emerson, Adrian J.; Hawes, Chris S.; Knowles, Gregory P.; Chaffee, Alan L.; Batten, Stuart R.; Turner, David R.
• Is Part Of: CrystEngComm. Volume 19:Issue 34(2017)
• Page Start: 5137
• Page End: 5145
• Publication Date: 2017-08-17
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c7ce01133d
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : A traditionally good chelating motif, propanediamine, has been incorporated into a robust coordination framework with vacant amine sites. Abstract : A traditionally good chelating motif has been incorporated into a ligand for the synthesis of coordination polymers with vacant amine sites. A novel tetracarboxylic acid diamine ligand, isolated as N, N, N ′, N ′-tetra(4-carboxybenzyl)-1, 3-diaminopropane dihydrochloride trihydrate(H6 L1)Cl2 ·3H2 O, has been prepared, structurally characterised, and subsequently used in the formation of three new coordination polymers. Poly-[Cu2 (L1 )(OH2 )2 ]·6DMF·3H2 O1 consists of (4, 4) sheets formed by eachL1 ligand coordinating to four copper(ii ) 'paddlewheel' dinuclear clusters. The amines of the ligand are non-coordinating. After solvent exchange and evacuation, 1 was found to adsorb approximately 23 cm 3 (STP) g −1 of CO2 at atmospheric pressure at 273 K. The isostructural compounds poly-[Zn(H2 L1 )(OH2 )]·DMF·4H2 O and poly-[Cd(H2 L1 )(OH2 )]·DMF·3H2 O2Zn /2Cd are self-penetrating (10, 3) coordination polymers containing square-shaped one-dimensional solvent channels. After solvent exchange it was found that2Zn and2Cd lost crystallinity, which accounts for the low N2 and CO2 uptakes observed.