Mechanochemical Synthesis of 3d Transition-Metal-1,2,4-Triazole Complexes as Precursors for Microwave-Assisted and Thermal Conversion to Coordination Polymers with a High Influence on the Dielectric Properties

Chemistry : a European Journal
F A BredeK Müller-Buschbaum

Abstract

The complexes [MCl2 (TzH)4 ] (M=Mn (1), Fe (2); TzH=1,2,4-1H-triazole) and [ZnCl2 (TzH)2 ] (3) have been obtained by mechanochemical reactions of the corresponding divalent metal chloride and 1,2,4-1H-triazole. They were successfully used as precursors for the formation of coordination polymers either by a microwave-assisted reaction or by thermal conversion. For manganese, the conversion directly yielded 1∞ [MnCl2 TzH] (4), whereas for the iron-containing precursor, 1∞ [FeCl2 TzH] (6), was formed via the intermediate coordination polymer 1∞ [FeCl(TzH)2 ]Cl (5). For cobalt, the isotypic polymer 1∞ [CoCl(TzH)2 ]Cl (7) was obtained, but exclusively by a microwave-induced reaction directly from CoCl2 . The crystal structures were resolved from single crystals and powders. The dielectric properties were determined and revealed large differences in permittivity between the precursor complexes and the rigid chain-like coordination polymers. Whereas the monomeric complexes exhibit very different dielectric behaviour, depending on the transition metal, from "low-k" to "high-k" with the permittivity ranging from 4.3 to >100 for frequencies of up to 1000 Hz, the coordination polymers and complexes with strong intermolecular interactions ...Continue Reading

References

Aug 22, 2001·Journal of Synchrotron Radiation·A MichalowiczY Garcia
Aug 13, 2002·Chemical Communications : Chem Comm·Viktor P BalemaVitalij K Pecharsky
Jan 27, 2005·Chemical Society Reviews·Antonio de la HozAndrés Moreno
Jan 28, 2005·Nature·Guus Rijnders, Dave H A Blank
Feb 8, 2006·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Geoffrey A TompsettK Sigfrid Yngvesson
Mar 1, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Dario BragaMarco Polito
May 18, 2006·Journal of the American Chemical Society·Qiong YeRen-Gen Xiong
Jun 20, 2006·Inorganic Chemistry·Yun-Zhi TangRen-Gen Xiong
May 24, 2008·Chemical Society Reviews·C Oliver Kappe
Jun 12, 2010·Chemical Communications : Chem Comm·Anthony S R ChesmanStuart R Batten
Oct 22, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Jacek KlinowskiJoão Rocha
Nov 10, 2010·Chemical Communications : Chem Comm·Vjekoslav StrukilTomislav Friščić
Sep 21, 2011·Chemistry : a European Journal·Mark D AllendorfA Alec Talin
May 17, 2012·Acta Crystallographica. Section E, Structure Reports Online·Maja VidmarAmalija Golobič
Nov 17, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Xin ZhangYuan-Gen Yao
Jan 13, 2015·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·S Praveen KumarV Narayanan
Aug 19, 2015·The Journal of Physical Chemistry Letters·Emilio J Juarez-PerezJuan Bisquert

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