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Materials 2010, 3(3), 1904-1912; doi:10.3390/ma3031904
Communication

Charge-Transfer Controlled Crystallization of a Model Oligomer for Donor-Acceptor-Polythiophenes

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Received: 25 January 2010; in revised form: 4 March 2010 / Accepted: 16 March 2010 / Published: 17 March 2010
(This article belongs to the Special Issue Conjugated Oligomers)
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Abstract: A model donor-acceptor oligomer consisting of benzodithiophene-diketone and thiophene has been investigated with regard to its molecular packing and opto-electronic properties. The crystal structure suggests that the packing is dominated by charge-transfer interactions between the electron-rich part of the molecule and the electron-poor part. A series of observations corroborate this assumption, among them are a charge-transfer band in the film absorption spectra and exceptionally low π-π distances. A detailed analysis of the energetic levels of the present system reveals that only the HOMO level of the acceptor is shifted by conjugation to the donor. The results can contribute to the development of improved materials for organic electronics.
Keywords: conjugated oligomer; donor-acceptor; charge-transfer; crystal engineering; molecular packing; energy levels conjugated oligomer; donor-acceptor; charge-transfer; crystal engineering; molecular packing; energy levels
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Rieger, R.; Enkelmann, V.; Müllen, K. Charge-Transfer Controlled Crystallization of a Model Oligomer for Donor-Acceptor-Polythiophenes. Materials 2010, 3, 1904-1912.

AMA Style

Rieger R, Enkelmann V, Müllen K. Charge-Transfer Controlled Crystallization of a Model Oligomer for Donor-Acceptor-Polythiophenes. Materials. 2010; 3(3):1904-1912.

Chicago/Turabian Style

Rieger, Ralph; Enkelmann, Volker; Müllen, Klaus. 2010. "Charge-Transfer Controlled Crystallization of a Model Oligomer for Donor-Acceptor-Polythiophenes." Materials 3, no. 3: 1904-1912.


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