期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 13, 期 24, 页码 6853-6863出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200700125
关键词
donor-acceptor systems; liquid crystals; metallomesogens; porphyrinoids; X-ray diffraction
A number of substituted zinc(II) porphycenes and porphyrins have been synthesized as potentially mesogenic materials. One of the resulting porphycenes, bearing eight decyloxy chains, exhibits two mesophases, a transient lamellar phase (Lam) and a highly ordered lamello-columnar phase (L-Col), with remarkably different structural characteristics. The same zinc(II) porphycene also forms an electron donor-acceptor (EDA) complex with tetracyanoquinodimethane (TCNQ), generating a hexagonal columnar mesophase (Col(h)) that is thermally stable up to ca. 200 degrees C. The EDA interaction between porphycene and TCNQ has been probed using electronic and vibrational spectroscopy. A mixture of zinc(II) porphyrins, isomeric with the above porphycene complex, forms a rectangular columnar mesophase (Col(r)).
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