Guest-host interaction of C60 adsorbed on an ordered layer of phthalocyanine derivatives
Abstract
Symmetrically substituted phthalocyanines (Pcs) with eight peripheral di-(tert-butyl)phenoxy (DTPO) groups self-organize on noble metal substrates. The rotational degrees of freedom, specific for the DTPO substituents, allow a bowl-like conformation of the Pc derivatives and thus, hosting of the C60 molecules in two clearly distinguishable binding sites. Moreover, controlled manipulation of the C60 by the STM tip enables switching from one site to the other. Since Pcs are well-known electron donors and C60 molecules are good acceptors, it can be conceived as a system with two morphologically different donor-acceptor complexes, individually addressable by an STM tip. Preliminary STS analysis shows vast differences in the electronic properties. Exploration of such a system is of great interest because of its similarity to fundamental biological processes (photosynthesis, respiration), as well as its potential for application in energy storage, conversion, nanoelectronics, etc.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2008
- Bibcode:
- 2008APS..MARL20005S