Design of Assembled Systems Based on Conjugated Polyphenylene Derivatives and Carbon Nanohorns

Promising materials have been designed and fully
characterised by an effective interaction between versatile
platforms such as carbon nanohorns (CNHs) and conjugated
molecules based on thiophene derivatives. Easy and non-aggressive
methods have been described for the synthesis and
purification of the final systems. Oligothiophenephenylvinylene
(OTP) systems with different geometries and electron
density are coupled to the CNHs. A wide range of characterization
techniques have been used to confirm the effective
interaction between the donor (OTP) and the acceptor
(CNH) systems. These hybrid materials show potential for integration
into solar cell devices. Importantly, surface-enhanced
Raman spectroscopy (SERS) effects are observed
without the presence of any metal surface in the system.
Theoretical calculations have been performed to study the
optimised geometries of the noncovalent interaction between
the surface and the organic molecule. The calculations
allow information on the monoelectronic energies of
HOMO–LUMO orbitals and band gap of different donor systems
to be extracted.

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