Three 3D coordination polymers based on [1, 1′:4′, 1′′-terphenyl]-2′, 4, 4′′, 5′-tetracarboxylate demonstrating magnetic properties and selective sensing of Al3+/Fe3+over mixed ions. Issue 2 (3rd December 2014)

• Record Type: Journal Article
• Authors: Kang, Bei-Bei; Wei, Na; Han, Zheng-Bo
• Is Part Of: RSC advances. Volume 5:Issue 2(2015)
• Page Start: 1605
• Page End: 1611
• Publication Date: 2014-12-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c4ra10124c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Three 3D coordination polymers have been synthesized by using the 1, 1′:4′, 1′′-terphenyl]-2′, 4, 4′′, 5′-tetracarboxylate acid and Cd(ii ), Co(ii ) and Mn(ii ), the Cd(ii ) complex shows selective sensing Al 3+ /Fe 3+ over the mixed metal ions. Abstract : Three three-dimensional (3D) coordination polymers with the formulae [Cd(TPTC)0.5 (H2 O)2 ] ·DMA (1 ), [Co2 (TPTC)(H2 O)1.5 (CH3 OH)0.5 ] (2 ), and [Mn2 (TPTC)(H2 O)(DMA)]·DMA (3 ) (TPTC = [1, 1′:4′, 1′′-terphenyl]-2′, 4, 4′′, 5′-tetracarboxylate acid) were solvothermally synthesized. They were characterized by thermogravimetric analyses, IR spectroscopy, X-ray powder diffraction, and single crystal X-ray diffraction.1 features a 3D porous coordination polymer formed from Cd-carboxylate chains and the TPTC bridges. In2 and3, the uniform metal–carboxylate chains with triple bridges, (μ-EO-H2 O)(μ- syn, syn -COO)2 and (μ-EO-H2 O/DMA)(μ- syn, syn -COO)2 (EO = end-on), were extended by the TPTC arms. Complex1 displayed strong fluorescent emission in the visible region. Interestingly, the emission intensities of1 were increased upon the addition of Al 3+ and quenched upon the addition of Fe 3+, even in mixtures of ions. Thus, 1 can act as a useful material for sensing Fe 3+ and Al 3+ ions. The magnetic studies of2 and3 show that antiferromagnetic interactions between the Co(ii ) and Mn(ii ) centers exist.