Dan Lehnherr - Pentacene-Based Dendrimers: Synthesis and Thin Film Photoconductivity Measurements of Branched Pentacene Oligomers

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  Publication Details (including relevant citation   information):

  D. Lehnherr, J. Gao, F.A. Hegmann, R.R. Tykwinski, Journal of   Organic Chemistry 2009, 74,   5017-5024


  The synthesis of   pentacene-based dendrimers has been achieved via esterification   of 1,3,5-benzenetricarboxylic acid and unsymmetrical pentacene   4 possessing a hydroxy group. Dendrimers   1  (C183H204O9Si9, 2800   g mol−1) and 2  (C540H570O30Si24,   8214 g mol−1) are characterized by 1H and   13C NMR, IR, UV−vis, and fluorescence spectroscopy, as   well as mass spectrometry. These branched oligomeric materials   are benchtop stable and soluble in common organic solvents,   allowing for solution cast formation of thin films. Photocurrent   and photocurrent yield measurements of these films reveal   improved efficiency in photogenerated conduction for dendrimers   in comparison to linearly connected pentacene-based   polymers.

  Address (URL): http://pubs.acs.org/doi/abs/10.1021/jo9007089