Fullerene/Thiol-Terminated Molecules

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• 作者：Yasuhiro Shirai ; Jason M. Guerrero ; Takashi Sasaki ; Tao He ; Huanjun Ding ; Guillaume Vives ; Byung-Chan Yu ; Long Cheng ; Austen K. Flatt ; Priscilla G. Taylor ; Yongli Gao ; James M. Tour
• 刊名：Journal of Organic Chemistry
• 出版年：2009
• 出版时间：October 16, 2009
• 年：2009
• 卷：74
• 期：20
• 页码：7885-7897
• 全文大小：1322K
• 年卷期：v.74,no.20(October 16, 2009)
• ISSN：1520-6904

文摘

A series of fullerene-terminated oligo(phenylene ethynylene) (OPEs) have been synthesized for potential use in electronic or optoelectronic device monolayers. Electronic properties such as the energy levels and the distribution of HOMOs and LUMOs of fullerene-terminated OPEs have been calculated using the ab initio method at the B3LYP/6-31G(d) level. The calculations have revealed the concentration of frontier orbitals on the fullerene cage and a narrow distribution of HOMO−LUMO energy gaps. Ultraviolet photoelectron spectroscopy and inverse photoemission spectroscopy studies have been performed to further examine the electronic properties of the fullerene-terminated OPEs on gold surfaces. The obtained broad photoelectron spectra suggest that there are strong intermolecular interactions in the fullerene self-assembled monolayers, and the small bandgap (1.5 eV), determined by the photoelectron spectroscopy, indicates the unique nature of the fullerene-terminated OPEs in which the C₆₀ moiety can be connected to the Au surface through the conjugated OPE backbone.