Graphene Functionalisation with a Conjugated Poly(fluorene) by Click Coupling: Striking Electronic Properties in Solution | Zendy

Castelaín  Marta | Zendy; Martínez Gerardo | Zendy; Merino Pablo | Zendy; MartínGago  José Á. | Zendy; Segura José L. | Zendy; Ellis Gary | Zendy; Salavagione Horacio J. | Zendy

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Graphene Functionalisation with a Conjugated Poly(fluorene) by Click Coupling: Striking Electronic Properties in Solution

Author(s) -

Castelaín Marta,

Martínez Gerardo,

Merino Pablo,

MartínGago José Á.,

Segura José L.,

Ellis Gary,

Salavagione Horacio J.

Publication year - 2012

Publication title -

chemistry – a european journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.687

H-Index - 242

eISSN - 1521-3765

pISSN - 0947-6539

DOI - 10.1002/chem.201102008

Subject(s) - fluorene , conjugated system , click chemistry , azide , graphene , alkyne , polymer chemistry , cycloaddition , raman spectroscopy , materials science , photochemistry , polymer , covalent bond , fourier transform infrared spectroscopy , chemistry , combinatorial chemistry , organic chemistry , chemical engineering , nanotechnology , catalysis , physics , engineering , optics

Graphene flakes covalently modified with a conjugated polymer, poly[(9,9‐dihexylfluorene)‐co‐alt‐(9,9‐bis‐(6‐azidohexyl)fluorene)] (PFA), were efficiently synthesised by a Cu‐catalysed Huisgen 1,3‐dipolar cycloaddition between alkyne‐modified graphene and an azide‐functionalised polymer. Two approaches for the modification of graphene with alkyne groups were investigated (coupling with a diazonium salt generated in situ or an amidation reaction) and the optimum conditions determined. The success of the click‐coupling approach was confirmed by FTIR, 1 H NMR, Raman, and X‐ray photoelectron spectroscopy (XPS). The absorption and emission spectra of the click product show a strong solvent dependency.

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