Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 23, Issue 34, Pages 4227-4235Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201203404
Keywords
hybrid materials; monolayers; optically active materials; redox-active materials; molecular electronics
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Funding
- Department of Science and Technology, Nano-Mission, University of Delhi, Delhi [SR/NM/NS-12/2010]
- German Research Society, (DFG) [ZH 63/9-3, ZH 63/14-1]
- Alexander von Humboldt (AvH) foundation
- Council of Scientific and Industrial Research
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Molecular assemblies of surface-confined heterometallic molecular dyads (SURHMDs) composed of optically rich and redox-active Fe(pytpy)(2)center dot 2PF(6) (Fe-PT), Ru(pytpy)(2)center dot 2PF(6) (Ru-PT) and Os(pytpy)(2)center dot 2PF(6) (Os-PT) pytpy = 4'-(4-pyridyl)-2,2':6',2 ''-terpyridyl] complexes are fabricated via bottom-up approach on SiOx based solid supports. Pairing of the two different metal-organic complexes at a single platform results in significant enlargement of the optical window (lambda = 400-800 nm), which can be of interest for potential applications. The use of the Cu-based linker ensures intramolecular electronic communication between these complexes. In addition, SURHMDs are electrochemically stable under large numbers of read-write cycles (10(3)) and exhibit multiple redox states at relatively low potentials (<1.2 V). Moreover, an electrochemical input at controlled potentials creates a mixed-valence multicomponent system.
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