Synthesis, structural features and luminescence properties of a 1-D poly(azolato)-based coordination polymer. (28th May 2015)

• Record Type: Journal Article
• Authors: Colombo, Valentina; Maspero, Angelo; Nardo, Luca; Aprea, Alessia; Linares, Fátima; Cimino, Alessandro; Galli, Simona
• Is Part Of: Polyhedron. Volume 92(2015)
• Page Start: 130
• Page End: 136
• Publication Date: 2015-05-28
• Subjects: Coordination polymers -- (Tetrazolato)-based ligands -- Powder X-ray diffraction -- Thermal behavior -- Luminescence; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2015.03.021
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: The air- and moisture-stable coordination polymer[Mn(Andolast)(H2 O)] features a 1-D double-chain motif in which MnN2 O2 nodes are bridged by Andolast 2− spacers, and shows a reduced luminescence with respect to Na2 Andolast, mainly as a consequence of the enhanced rate of non-radiative decays. Abstract: The novel coordination polymer[ Mn(Andolast)(H2 O) ] was isolated in the form of air- and moisture-stable polycrystalline powders by reacting Mn(CH3 COO)2 ·4H2 O and the sodium salt of N -4-(1 H -tetrazol-5-yl)phenyl-4-(1 H -tetrazol-5-yl) benzamide (Na2 Andolast). The crystal structure of[ Mn(Andolast)(H2 O) ], determined by powder X-ray diffraction (PXRD) structure solution methods, is composed by 1-D double-chain motifs. The thermal behavior of[ Mn(Andolast)(H2 O) ] was investigated by coupling thermal analyses to variable-temperature PXRD: water evolution takes place in the range 80–250 °C with no change of the unit cell parameters up to 180 °C; at 200 °C, a low-crystallinity phase is formed, surviving up to 300 °C. The electronic transition spectroscopic properties of both Na2 Andolast and the coordination polymer were assessed, with particular care to luminescence:[ Mn(Andolast)(H2 O) ] is luminescent already at room temperature, even if its emission is reduced with respect to that of Na2 Andolast, mainly as a consequence of the enhanced rate of non-radiative decays.