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|Title:||Novel dibenzo[fg,op]naphthacene discotic liquid crystals: a versatile rational synthesis|
Naidu, Jaishri J.
Shankar Rao, D.S.
|Publisher:||Royal Society of Chemistry|
|Citation:||Journal of Materials Chemistry, 2002, Vol.12, p1335-1341|
|Abstract:||A rational synthesis for dibenzo[fg,op]naphthacene derivatives (also named as dibenzopyrene) is described. The methodology involves the preparation of a quaterphenyl using a palladium-catalysed cross-coupling of arylboronic acids followed by chemical or photochemical cyclization. The versatility of the process is shown by the formation of various dibenzo[fg,op]naphthacene derivatives having identical or non-identical peripheral chains. All the new compounds exhibit a single mesophase, which has been identified by X-ray diffractometry and optical microscopy as hexagonal columnar (Colh). X-Ray results confirm that hexasubstituted dibenzonaphthacenes are more ordered than octasubstituted derivatives.|
|Copyright:||2002 Royal Society of Chemistry|
|Appears in Collections:||Research Papers (SCM)|
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