Two novel nickel(ii) and cobalt(ii) metal–organic frameworks based on a rigid aromatic multicarboxylate ligand: syntheses, structural characterization and magnetic properties. Issue 28 (14th June 2016)

• Record Type: Journal Article
• Authors: Hu, Tuo-Ping; Xue, Zhi-Jia; Zheng, Bao-Hua; Wang, Xiao-Qing; Hao, Xue-Na; Song, You
• Is Part Of: CrystEngComm. Volume 18:Issue 28(2016)
• Page Start: 5386
• Page End: 5392
• Publication Date: 2016-06-14
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c6ce00674d
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Two novel transition metal–organic frameworks based on a rigid aromatic tetracarboxylate ligand have been synthesized and investigated. Abstract : Two novel metal–organic frameworks, formulated as [Ni3 (qptc)2 (H2 O)3 ]·3.5H2 O·3Me2 NH (1 ) and [Co3 (qptc)2 (H2 O)4 ]·5H2 O (2 ) (H4 qptc = 1, 1′:4′, 1′′:4′′, 1′′′-quaterphenyl-2, 4, 2′′′, 4′′′-tetracarboxylic acid), have been hydrothermally constructed based on a rigid aromatic multicarboxylate ligand. The single-crystal X-ray diffraction analysis shows that complex1 crystallizes in the triclinic crystal system with space group P 1̄ and possesses a 4, 8-connected 3D open framework including trinuclear nickel Ni3 SBUs, which belongs to an scu topology with the point symbols (4 16 ·6 12 ) and (4 4 ·6 2 ). Complex2 belongs to the monoclinic crystal system with space group C 2/ c and exhibits a 3D framework containing Co3 SBUs, which is a flu topology with the point symbols (4 12 ·6 12 ·8 4 ) and (4 6 ). Furthermore, the variable-temperature magnetic susceptibilities of complexes1 and2 have been investigated. Both complexes show weak ferromagnetic coupling between metal ions estimated by using a linear trinuclear model for1 in the range of 2–300 K and the PHI program for2 in the range of 20–300 K taking the orbital contribution into consideration.