Syntheses, crystal structures, and spectroscopic and magnetic properties   of [Mn-2(III)(H2L1)(Cl(4)Cat)(4)center dot 2H(2)O](infinity) and   [Mn-2(III)(H2L2)(Cl(4)Cat)(4)center dot 2CH(3)CN center dot   2H(2)O](infinity): Temperature-dependent valence

doi:10.1021/ic051064j

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	Syntheses, crystal structures, and spectroscopic and magnetic properties of [Mn-2(III)(H2L1)(Cl(4)Cat)(4)center dot 2H(2)O](infinity) and [Mn-2(III)(H2L2)(Cl(4)Cat)(4)center dot 2CH(3)CN center dot 2H(2)O](infinity): Temperature-dependent valence
	Shaikh, N ; Goswami, S ; Panja, A ; Sun, HL ; Pan, F ; Gao, S ; Banerjee, P
刊名	inorganic chemistry
	2005
关键词	TRANSITION-METAL COMPLEXES CHARGE-TRANSFER COMPLEXES ORGANIC FERROMAGNETS QUINONE COMPLEXES CATECHOLATE INTERCONVERSION SEMIQUINONE LIGAND MANGANESE MN(III)
DOI	10.1021/ic051064j
英文摘要	The synthesis, X-ray data, and electronic structures of two manganese(l 11) 1 D polymers ligated by tetrachlorocatechol, [Mn-2(III)(H2L1)(Cl(4)Cat)(4)center dot 2H(2)O](infinity) (1) and [Mn-2(III)(H2L2)(Cl(4)Cat)(4)center dot 2CH(3)CN-2H(2)O](infinity) (2), are reported. The electronic structures of the complexes have been determined by UV-vis-near-R, IR, electron paramagnetic resonance (EPR), and magnetic susceptibility measurements. Both I and 2 are air stable in the solid state and in solution, unlike most of the previously reported o-quinone-chelated transition-metal complexes. Electronic spectroscopy exhibits a strong near-IR band near 1900 nm for both, suggesting the presence of a mixed-valence semiquinone-catecholate oxidation state of the catechol ligands, Mn-2(III)(Cl(4)Cat)(2)(Cl(4)SQ)(2), together with the pure catecholate forms. The presence of this isomer was further supported by EPR and magnetic susceptibility measurements. The complexes undergo intramolecular electron transfer (valence tautomerism) upon an increase of the temperature involving the equilibrium Mn-2(III)(Cl(4)Cat)(2)(Cl(4)SQ)(2) reversible arrow Mn-2(II)(Cl(4)SQ)(4). This phenomenon is reversible and is studied in solution using UV-visnear-IR spectroscopy.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000234192300024&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Inorganic & Nuclear; SCI(E); 18; ARTICLE; 26; 9714-9722; 44
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/253468]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Shaikh, N,Goswami, S,Panja, A,et al. Syntheses, crystal structures, and spectroscopic and magnetic properties of [Mn-2(III)(H2L1)(Cl(4)Cat)(4)center dot 2H(2)O](infinity) and [Mn-2(III)(H2L2)(Cl(4)Cat)(4)center dot 2CH(3)CN center dot 2H(2)O](infinity): Temperature-dependent valence[J]. inorganic chemistry,2005.
APA	Shaikh, N.,Goswami, S.,Panja, A.,Sun, HL.,Pan, F.,...&Banerjee, P.(2005).Syntheses, crystal structures, and spectroscopic and magnetic properties of [Mn-2(III)(H2L1)(Cl(4)Cat)(4)center dot 2H(2)O](infinity) and [Mn-2(III)(H2L2)(Cl(4)Cat)(4)center dot 2CH(3)CN center dot 2H(2)O](infinity): Temperature-dependent valence.inorganic chemistry.
MLA	Shaikh, N,et al."Syntheses, crystal structures, and spectroscopic and magnetic properties of [Mn-2(III)(H2L1)(Cl(4)Cat)(4)center dot 2H(2)O](infinity) and [Mn-2(III)(H2L2)(Cl(4)Cat)(4)center dot 2CH(3)CN center dot 2H(2)O](infinity): Temperature-dependent valence".inorganic chemistry (2005).