Coordination organized dimer of N-methylimidazolylphthalocyaninato-Zn or Mg

ORGN 15

Yoshiaki Kobuke, kobuke@ms.naist.jp, Kazuya Kameyama, and Akiharu Satake, satake@ms.naist.jp. Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
Metallophthalocyanine dimers were obtained by complementary self-coordination of imidazolyl to Zn(II) or Mg(II) in N-methylimidazolyl-appended phthalocyaninatozinc(II) or magnesium(II). The association constants of the dimers were estimated as over 1011 M-1 in toluene by dissociative titration with imidazole. The UV-vis spectrum showed characteristically split Q bands due to the exciton coupling of the slipped cofacial structure in a close distance to give rise to red- and blue shifts of head-to-tail and face-to-face transitions, respectively. The dimer maintained the fluorescence intensity of the high fluorescence of the monomeric phthalocyanines. The structure was confirmed by specific shift of imidazolyl peaks by the ring current.

 

Molecular Recognition and Self-Assembly
8:00 AM-12:00 PM, Sunday, 28 August 2005 Washington DC Convention Center -- 201, Oral

Division of Organic Chemistry

The 230th ACS National Meeting, in Washington, DC, Aug 28-Sept 1, 2005