Mixed-valence MnIIIMnIV clusters [Mn7O8(O2SePh)8(O2CMe)(H2O)] and [Mn7O8(O2SePh)9(H2O)]: single-chain magnets exhibiting quantum tunneling of magnetization

Inorganic Chemistry
Nicole E ChakovGeorge Christou

Abstract

The syntheses, structures, and magnetic properties of two new Mn7 complexes containing phenylseleninate ligands are reported. [Mn7O8(O2SePh)8(O2CMe)(H2O)] (1) and [Mn7O8(O2SePh)9(H2O)] (2) were both prepared by the reaction of 18 equiv of benzeneseleninic acid (PhSeO2H) with [Mn12O12(O2CMe)16(H2O)4] in MeCN. Complex 1 x 6MeCN crystallizes in the triclinic space group P, and complex 2 x 2CH2Cl2 crystallizes in the monoclinic space group P2(1)/m. Both compounds possess an unprecedented [Mn7O8]9+ core comprising a central [MnIII3(micro3-O)4]+ unit attached to [MnIV2(micro-O)2]4+ and [MnIV2(micro-O)(micro3-O)]4+ units on either side. In each cluster, the PhSeO2- groups function as bridging ligands between adjacent Mn centers. The structure reveals strong Se.O intermolecular contacts between Mn7 units to give a one-dimensional chain structure, with weak interchain interactions. Solid-state DC magnetic susceptibility measurements of complexes 1 and 2 reveal that they have very similar properties, and detailed studies on 1 by AC susceptibility measurements confirm an S = 2 ground-state spin value. In addition, out-of-phase AC signals are observed, suggesting slow magnetization relaxation. Magnetization versus DC field sweeps down to 0...Continue Reading

Citations

Aug 3, 2006·Chemical Communications : Chem Comm·Yuan-Zhu ZhangSong Gao
Jul 2, 2010·Chemical Communications : Chem Comm·Chen-I YangMotohiro Nakano
Mar 11, 2011·Chemical Communications : Chem Comm·Chen-I YangKuang-Lieh Lu
Feb 2, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Lollita LecrenRodolphe Clérac
Jan 11, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Hitoshi Miyasaka, Masahiro Yamashita
Dec 19, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Uppara Ugandhar, Viswanathan Baskar
Mar 12, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Hua YangJianmin Dou
Jan 29, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Constantinos C StoumposSpyros P Perlepes
Mar 11, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Yanfeng BiDeqian Li
Apr 20, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Valeriu MereacreAnnie K Powell
Jun 30, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Mei WangQiu-Tian Liu
Jan 29, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Mei WangChangneng Chen
May 16, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiao-Jiao SongYou Song
Aug 29, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Yu ZhangGang Li
Feb 14, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Jing XiangTai-Chu Lau
Mar 9, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Pei-Pei YangDai-Zheng Liao
Oct 16, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Hua YangJian-Min Dou
Dec 2, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Santokh S TandonLaurence K Thompson
Oct 27, 2020·Angewandte Chemie·Saurav BhattacharyaUlrich Kortz
Apr 14, 2009·Inorganic Chemistry·Hitoshi MiyasakaRodolphe Clérac
Apr 16, 2008·Inorganic Chemistry·Abhudaya MishraGeorge Christou

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