Rational assembly of Pb(II)/Cd(II)/Mn(II) coordination polymers based on flexible V-shaped dicarboxylate ligand: Syntheses, helical structures and properties

• Published in: Journal of solid state chemistry 2015-05, Vol.225, p.391-401
• Main Authors: Yang, Gao-Shan, Liu, Chong-Bo, Liu, Hong, Robbins, Julianne, Zhang, Z. John, Yin, Hong-Shan, Wen, Hui-Liang, Wang, Yu-Hua
• Format: Article
• Language: English
• Subjects: 2,2′-[Hexafluoroisopropylidenebis(p-phenyleneoxy)]diacetic acid; ANTIFERROMAGNETISM; BIPYRIDINES; CADMIUM COMPOUNDS; CARBOXYLATION; Coordination polymers; COUPLING; CRYSTAL STRUCTURE; HYDRATES; HYDROTHERMAL SYNTHESIS; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; LEAD COMPOUNDS; LIGANDS; MAGNETIC PROPERTIES; ORGANIC POLYMERS; PHENANTHROLINES; PHOTOLUMINESCENCE; Photoluminescent and magnetic properties
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2014.12.013

Six new coordination polymers, namely, [Pb(L)(H2O)] (1), [Pb(L)(phen)] (2), [Pb2(L)2(4,4′-bipy)0.5] (3), [Cd(L)(phen)] (4), [Cd(L)(4,4′-bipy)]·H2O (5) and [Mn(L)(4,4′-bipy)]·H2O (6) have been synthesized by the hydrothermal reaction of 2,2′-[hexafluoroisopropylidenebis(p-phenyleneoxy)]diacetic acid (H2L) with Pb(II)/Cd(II)/Mn(II) in the presence of ancillary ligands 4,4′-bipyridine (4,4′-bipy) or 1,10-phenanthroline (phen). Complexes 1 and 4–6 exhibit 2-D structures, and complexes 2–3 display 3-D frameworks, of which L2− ligands join metal ions to single-stranded helical chains of 1, 3–6 and double-stranded helical chains of 2. Complexes 2 and 3 also contain double-stranded Metal–O helices. Topology analysis reveals that complexes 1 and 4 both represent 4-connected sql net, 2 represents 6-connected pcu net, 3 exhibits a novel (3,12)-connected net, while 5 and 6 display (3,5)-connected gek1 net. The six complexes exhibit two kinds of inorganic–organic connectivities: I0O2 for 1, 4–6, and I1O2 for 2–3. The photoluminescent properties of 4–5 and the magnetic properties of 6 have been investigated. Six new Pb(II)/Cd(II)/Mn(II) coordination polymers with helical structures based on flexible V-shaped dicarboxylate ligand have been synthesized and structurally characterized. Photoluminescent and magnetic properties have been investigated. [Display omitted] •Six novel M(II) coordination polymers with 2,2′-[hexafluoroisopropylidenebis(p-phenyleneoxy)]diacetic acid and N-donor ligands.•Complexes 1–6 show diverse intriguing helical characters.•The luminescent properties of complexes 1–5 were investigated.•Complex 6 shows antiferromagnetic coupling.