Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 10, Issue 11, Pages 2681-2688Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200305659
Keywords
fluorene; glasses; liquid crystals; oligomerization; photoluminescence
Categories
Ask authors/readers for more resources
An efficient synthesis of 9,9-bis(2-ethylhexyl)fluorene oligomers up to the heptamer is reported, with repetitive Suzuki and Yamamoto coupling reactions employed in the synthesis. The key steps for preparation of the essential intermediates include Pd-catalyzed transformation of aryl bromides to aryl boronic esters (Miyaura reaction) and the application of the much higher reactivity of aryl boronic esters over aryl bromides in the Pd-catalyzed cross-coupling reaction with aryl diazonium salts. Variation of the UV/Vis absorption and photoluminescence characteristics with chain length is reported. Moreover, glass transition and liquid-crystal characteristics of the oligomers are described and compared with those of the polymer.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available