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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Characterization, liquid crystallinity and spin-coated films of some metalated 1,4,8,11,15,18,22,25-octaalkyl tetrabenzo [b,g,l,q][5,10,15] triazaporphyrin derivatives
Journal of Porphyrins and Phthalocyanines, Volume 15, No. 9-10, Year 2011
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Description
The preparation and characterization of a number of metalated derivatives of 1,4,8,11,15,18,22,25-octahexyl and 1,4,8,11,15,18,22,25-octadecyl tetrabenzotriazaporphyrins (TBTAPs) are reported. The mesophase behavior of the compounds has been characterized by differential scanning calorimetry (DSC) and by polarized light optical microscopy. Mesophase behavior is compared with data for the corresponding phthalocyanine derivatives reported earlier. The temperature range of the mesophase(s) exhibited by the title compounds is generally broader than those of their phthalocyanine analogs. UV-vis data for examples of the TBTAP compounds as spin-coated films reveal differences in the type of molecular packing in the as-deposited films that is largely dependent upon the length of the alkyl chain substituents. On heating, the films undergo molecular reorganizations at temperatures corresponding to the mesophase transitions of bulk material observed by DSC. © 2011 World Scientific Publishing Company.
Authors & Co-Authors
Cammidge, Andrew N.
United Kingdom, Norwich
University of East Anglia
Chambrier, Isabelle
United Kingdom, Norwich
University of East Anglia
Cook, Michael J.
United Kingdom, Norwich
University of East Anglia
Langner, Ernst H.G.
South Africa, Bloemfontein
University of the Free State
Rahman, Muhibur
United Kingdom, Norwich
University of East Anglia
Swarts, Jannie C.
South Africa, Bloemfontein
University of the Free State
Statistics
Citations: 12
Authors: 6
Affiliations: 2
Identifiers
Doi:
10.1142/S1088424611003793
ISSN:
10884246