Template syntheses and properties of copper(II)-lanthanide(III) complexes of phenol-based symmetric and unsymmetric dinucleating macrocycles

Kazuhiro Manseki, Yasutaka Kitakami, Masatomi Sakamoto, Hiroshi Sakiyama, Akira Matsumoto, Yoshihiko Sadaoka, Yuzo Nishida, Masahiro Sakai, Yutaka Fukuda, Masaaki Ohba, Hisashi Õkawa

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Cu(II)-Ln(III) complexes of H2(fsal-n,m) ((n,m = (2,3), (3,2) (3,3); Ln = Lanthanide), fsal-n,m-Cu,Ln, have been synthesized by a template reaction, where fsal-n,m2- denotes dinucleating macrocycles with two 2,6-6bis(iminomethyl)-4-methylphenolate entities combined through two lateral chains, -(CH2)n- and -(CH2)m-, at the imino nitrogens. Temperature dependences of magnetic susceptibilities for the Cu(II)-Gd(III) complexes showed that an intramolecular ferromagnetic interaction operates between Cu(II) and Gd(III) ions in fsal-2,3-Cu,Gd and fsal-3,2-Cu,Gd. Absorption spectra suggested that substrates possessing N- and O-donor groups such as amino alcohols are specifically bound at the Cu-Ln centre of fsal-2,3-Cu,Ln, through the nitrogen to the copper site and through the oxygen to the lanthanide site. The fluorescence intensity of Eu(III) decreased drastically on forming the Cu-Eu complex.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalJournal of Coordination Chemistry
Volume48
Issue number1
DOIs
Publication statusPublished - 1999

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Materials Chemistry

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