Electrosynthesis of thin films of polythiophenes containing pyrene groups and flexible spacers, useful in the preparatio
- PDF / 1,539,976 Bytes
- 10 Pages / 432 x 648 pts Page_size
- 13 Downloads / 135 Views
MRS Advances © 2019 Materials Research Society DOI: 10.1557/adv.2019.410
Electrosynthesis of thin films of polythiophenes containing pyrene groups and flexible spacers, useful in the preparation of graphene polymer composites Bianca X. Valderrama-García1,2, Israel González-Méndez,1 Alix Sournia-Saquet2,3, Marine Tasse2,3, Kathleen I. Moineau-Chane Ching2,3* and Ernesto Rivera1* 1)Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior Ciudad Universitaria C.P. 04510, Ciudad de México, México.
2)
CNRS; LCC (Laboratoire de Chimie de Coordination); 205, route de Narbonne, 31077 Toulouse, France
3)Université
de Toulouse; UPS, INP; LCC; 31077 Toulouse, France
*[email protected] (K. M. C.); Tel.: +33 561 33 31 33 * [email protected] (E.R.), Tel.: +52 55 56 22 47 33
ABSTRACT
Thin polythiophene films were prepared by electrodeposition, using two novel thiophene monomers containing a pyrene unit linked via a flexible spacer. The obtained polymers have a suitable architecture for the further preparation of polymer composites with graphene via - interactions. Physicochemical characterization of the precursor polymers demonstrated that the resulting films are made of homogeneous electroactive polythiophene with pendant pyrene units regularly located on the polymer surface. These compounds are highly emissive and easily form excimers as other high pyrene content polymers. The polymer emission can be drastically quenched by the interaction with graphene after dipping the film into an aqueous suspension of reduced graphite oxide. The presence of aggregated graphene onto pyrene rich content areas by noncovalent interactions has been confirmed by AFM analysis. This kind of
Downloaded from https://www.cambridge.org/core. Columbia University - Law Library, on 15 Jan 2020 at 22:39:14, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1557/adv.2019.410
polythiophene/pyrene thin films showed to be a good matrix for the elaboration of fluorescent polymer composites. 1. INTRODUCTION Nowadays, the study of the reactivity and modification of carbon allotropes, particularly graphene, became one of the most promising research topics in nanoscience. Graphene has attracted the attention of many scientist working on this area due to its unique chemical, mechanical, electrical, and thermal properties [1,2]. Graphene exhibits remarkable properties that make it the best prospect for potential applications in organic electronics and in the elaboration of novel optoelectronic devices [3,4], electrodes [5], supercapacitors [6], new sensors [7], high performance biomedical materials [8] and new catalysts [9] among others. Graphene can be prepared by different methods such as mechanical exfoliation [2], graphite oxidation [10], thermal deposition [11,12], and liquid-phase exfoliation of graphite [13-16]. Nevertheless, recently the Hummers oxidationreduction method demonstrated to be very efficient and has been extensive
Data Loading...
