論文

1998年10月

Photochemical formation of ferrimagnetic chains from a pair of polymeric complexes made of octahedral bis(hexafluoroacetylacetonato)manganese(II) with diazodi(4-pyridyl)methane in the cis and trans configurations as repeating units

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
  • S Karasawa
  • ,
  • Y Sano
  • ,
  • T Akita
  • ,
  • N Koga
  • ,
  • T Itoh
  • ,
  • H Iwamura
  • ,
  • P Rabu
  • ,
  • M Drillon

120
39
開始ページ
10080
終了ページ
10087
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/ja981293n
出版者・発行元
AMER CHEMICAL SOC

Two kinds of 1:1 manganese complexes a and b of bis(hexafluoroacetylacetonato)manganese(II) coordinated with diazodi(4-pyridyl)methane (1) were prepared. Complexes a and b crystallize in the orthorhombic space group Pbca and in monoclinic Cu,lc, respectively. Two pyridyl nitrogen atoms from two different molecules of 1 are coordinated in the cis and trans configurations to the manganese ion to form helical and zigzag infinite chains of octahedral manganese complexes in complexes a and b, respectively. The magnetic susceptibilities (chi(mol)) Of both crystals before and after irradiation were measured on a SQUID susceptometer and revealed chi(mol)T vs T plots characteristic of ferrimagnetic chains after irradiation for 97 h; interaction between the manganese(II) ion and the photogenerated carbene is antiferromagnetic in both complexes. The antiferromagnetic exchange coupling parameters (J) in the photolyzate of complex a and b were estimated by a theoretical treatment through a procedure of extrapolation by using small rings to be J/k(B) = -34.8 +/- 0.8 and -24.4 +/- 0.5 K, respectively. Maximum chi(mol)T values of 210 at 5 K for cis- and 246 emu . K . mol(-1) at 1.9 K for trans complexes correspond to correlation lengths of 186 and 218 manganese-carbene S = 3/2 units, respectively.

Web of Science ® 被引用回数 : 65

リンク情報
DOI
https://doi.org/10.1021/ja981293n
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000076381000012&DestApp=WOS_CPL
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0032494389&origin=inward

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