Synthesis and mesomorphism of novel non-symmmetric mono beta-aryl (octylsulfanyl)porphyrazines and their Ni(II) complexes were reported. A recently disclosed asymmetrization procedure led to mono beta-bromo substituted porphyrazines, which provided access to aryl substituted derivatives through Suzuki cross-coupling. UV-Vis spectroscopy showed a bathochromic shift for bromine and aryl substituted nickel complexes. Optical Microscopy and DSC showed that Br derivatives 3a-3b and H-heptakis Ni(II) complex 2b display two columnar mesophases (Col(h) and Col,) stable even at RT and a wide Delta T (100 degrees C). Introduction of the aryl substituent on the macrocycle caused the appearance of only the Col(h) mesophase and lower Delta T.

Columnar Discotic Mesophases from Novel Non-symmetrically Substituted (Octylsulfanyl) Porphyrazines Molecular Crystals and Liquid Crystals

BELVISO, Sandra;AMATI, Mario;LELJ GAROLLA DI BARD, Francesco
2008

Abstract

Synthesis and mesomorphism of novel non-symmmetric mono beta-aryl (octylsulfanyl)porphyrazines and their Ni(II) complexes were reported. A recently disclosed asymmetrization procedure led to mono beta-bromo substituted porphyrazines, which provided access to aryl substituted derivatives through Suzuki cross-coupling. UV-Vis spectroscopy showed a bathochromic shift for bromine and aryl substituted nickel complexes. Optical Microscopy and DSC showed that Br derivatives 3a-3b and H-heptakis Ni(II) complex 2b display two columnar mesophases (Col(h) and Col,) stable even at RT and a wide Delta T (100 degrees C). Introduction of the aryl substituent on the macrocycle caused the appearance of only the Col(h) mesophase and lower Delta T.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/2066
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