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Structure modulated charge transfer in carbon atomic wires.

Abstract：

:sp-Hybridized carbon atomic wires are appealing systems with large property tunability. In particular, their electronic properties are intimately related to length, structure, and type of functional end-groups as well as to other effects such as the intermolecular charge transfer with metal nanoparticles. Here, by a combined Raman, Surface Enhanced Raman Scattering (SERS) investigation and first principles calculations of different N,N-dimethylanilino-terminated polyynes, we suggest that, upon charge transfer interaction with silver nanoparticles, the function of sp-carbon atomic wire can change from electron donor to electron acceptor by increasing the wire length. In addition, the insertion into the wire of a strong electrophilic group (1,1,4,4-tetracyanobuta-1,3-diene-2,3-diyl) changes the electron-accepting molecular regions involved in this intermolecular charge transfer. Our results indicate that carbon atomic wires could display a tunable charge transfer between the sp-wire and the metal, and hold promise as active materials in organic optoelectronics and photovoltaics.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Milani A,Barbieri V,Facibeni A,Russo V,Li Bassi A,Lucotti A,Tommasini M,Tzirakis MD,Diederich F,Casari CS

doi

10.1038/s41598-018-38367-9

subject

Has Abstract

pub_date

2019-02-07 00:00:00

pages

1648

issue

1

issn

2045-2322

pii

10.1038/s41598-018-38367-9

journal_volume

9

pub_type

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