Jump to main content
Jump to site search

Issue 11, 2010
Previous Article Next Article

Pyrazine control of the supramolecular chemistry of iron(ii) and cobalt(ii) phthalocyanines

Author affiliations

Abstract

Three supramolecular complexes of FePc and CoPc with pyrazine in crystalline form have been obtained. In the case of FePc the biaxial ligation by pyrazine with the formation of FePc(pyz)2 (I) has been observed, whereas in the case of CoPc, depending on the thermal conditions, mono- and biaxial ligation by pyrazine are observed. At temperature 140 °C the recrystallisation process yields the formation of monoaxially ligated T-shaped and H-shaped complexes, CoPc(pyz) and (CoPc)2(pyz), which cocrystallise with pyrazine as solvent molecules forming {[2CoPc(pyz)][(CoPc)2(pyz)]·3pyz} (II) crystals. At higher temperature (180 °C) recrystallisation of CoPc in pyrazine leads to mono- and biaxial ligation of the central Co(II) of CoPc forming two different types of complexes: (CoPc)2(pyz) and CoPc(pyz)2, which, at used condition, cocrystallise forming [CoPc(pyz)2(CoPc)2(pyz)] (III) crystals. The solubility of compounds I, II and III in pyridine and related N-donating solvents are greater than that of the parent FePc and CoPc complexes. The UV-Vis spectra of I, II and III show that the Pc π-system is not significantly perturbed by the axial ligand.

Graphical abstract: Pyrazine control of the supramolecular chemistry of iron(ii) and cobalt(ii) phthalocyanines

Back to tab navigation

Supplementary files

Article information


Submitted
23 Feb 2010
Accepted
10 May 2010
First published
06 Jul 2010

CrystEngComm, 2010,12, 3599-3606
Article type
Paper

Pyrazine control of the supramolecular chemistry of iron(II) and cobalt(II) phthalocyanines

J. Janczak and R. Kubiak, CrystEngComm, 2010, 12, 3599
DOI: 10.1039/C003440A

Social activity

Search articles by author

Spotlight

Advertisements