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Dimerization and Coordination Properties of Zinc(II)tetra-4-alkoxybenzoyloxiphthalocyanine in Relation to DABCO in o-Xylene and Chloroform

  • N. Sh. Lebedeva
  • R. S. Kumeev
  • G. A. Al’per
  • E. V. Parfenyuk
  • A. S. Vashurin
  • T. V. Tararykina
Original Paper

Abstract

For the first time the interactions between zinc(II)tetra-4-alkoxybenzoyloxiphthalocyanine (Zn(4—O—CO—C6H4—OC11H23)Pc) and 1,4-diazabicyclo[2.2.2]octane (DABCO) in o-xylene and chloroform have been studied by calorimetric titration and NMR and electron absorption spectroscopic methods. It has been found that in o-xylene at concentrations of Zn(4—O—CO—C6H4—OC11H23)Pc higher than 6×10−4 mol⋅L−1 ππ dimers species are formed (λ max= 685 nm). Additions of DABCO to the solution up to mole ratio 1 : 8 (Zn(4—O—CO—C6H4—OC11H23)Pc : DABCO) lead to a shift of the aggregation equilibrium towards monomer species due to formation of monoligand axial complexes. Further increasing the DABCO concentration results in formation of Zn(4—O—CO—C6H4—OC11H23)Pc—DABCO—Zn(4—O—CO—C6H4—OC11H23)Pc sandwich dimers (λ max= 675 nm).

Keywords

Metallophthalocyanine ππ dimerization Sandwich dimers Molecular complex formation 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • N. Sh. Lebedeva
    • 1
  • R. S. Kumeev
    • 1
  • G. A. Al’per
    • 1
  • E. V. Parfenyuk
    • 1
  • A. S. Vashurin
    • 1
    • 2
  • T. V. Tararykina
    • 2
  1. 1.Institute of Solution Chemistry of RASIvanovoRussia
  2. 2.Ivanovo State University of Chemistry and TechnologyIvanovoRussia

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