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  Epitaxial composite layers of electron donors and acceptors from very large polycyclic aromatic hydrocarbons

Samori, P., Severin, N., Simpson, C. D., Müllen, K., & Rabe, J. P. (2002). Epitaxial composite layers of electron donors and acceptors from very large polycyclic aromatic hydrocarbons. Journal of the American Chemical Society, 124(32), 9454-9457. doi:10.1021/ja020323q.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-6553-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-816E-1
Genre: Journal Article

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 Creators:
Samori, P., Author
Severin, N., Author
Simpson, C. D.1, Author              
Müllen, Klaus1, Author              
Rabe, J. P., Author
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Abstract: Large polycyclic aromatic hydrocarbons (PAHs) can be considered as nanographenes, whose electron donating or accepting properties are controlled by their size and shape as well as functionalities in their periphery. Epitaxial thin films of them are targets for optoelectronic applications; however, large PAHs are increasingly difficult to process. Here we show that epitaxial layers of very large unsubstituted PAHs (C42H18 and C132H34), as well as a mixed layer of C42H18 with an electron acceptor, can be obtained by self-assembly from solution. The C132H34 is by far the largest nanographene that up to now has been processed into ordered thin films; due to its size it cannot be sublimed in a vacuum. Scanning tunneling microscopy (STM) studies reveal that the interaction with the substrate induces a strong perturbation of the electronic structure of the pure donor in the first epitaxial monolayer. In a second epitaxial layer with a donor acceptor stoichiometry of 2:1 the molecules are unperturbed.

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Language(s): eng - English
 Dates: 2002-08-14
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: eDoc: 28650
ISI: 000177358600043
DOI: 10.1021/ja020323q
 Degree: -

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Title: Journal of the American Chemical Society
  Other : J. Am. Chem. Soc.
  Abbreviation : JACS
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 124 (32) Sequence Number: - Start / End Page: 9454 - 9457 Identifier: ISSN: 0002-7863
CoNE: https://pure.mpg.de/cone/journals/resource/954925376870