Thiophene pyrenyl derivatives for the supramolecular processability of single-walled carbon nanotubes in thin film heterojunction

Organic Functionalized Carbon Nanostructures for Solar Energy Conversion

“…Considering covalent functionalization, in 2017, Salice et al [ 92 ] proposed CNT derivatization via a Tour reaction. In particular, beginning with the consideration that thienyl group increases the interaction between CNT and the P3HT used as active layer in OPV, they synthetized the 4-(thien-2-yl)-aniline that was reacted with isopentylnitrite in 1-cyclohexyl-2-pyrrolidone for the in situ generation of the diazonium salt used for the derivatization of the CNTs.…”

“…For this reason, the development of suitable organic molecules able to improve the interaction with organic semiconductors represents a very important objective. In 2017, Sartorio and coworkers [ 92 ] proposed a series of pyrenyl derivatives as suitable materials to tailor the interaction between SWCNTs and P3HT to be used for electron transfer in thin-film heterojunction, with P3HT as the donor system. They developed four bifunctional organic derivatives (PyrTh1-4) composed of a pyrene moiety able to interact with the CNTs’ carbon shell and a thiophene unit to improve the affinity with P3HT.…”

“… ( a ) Retrosynthetic approach to the preparation of thiophene derivatives with pyrene pendants: esterification of 3-thiopheneethanol (for derivatives PyrTh1–3) and 3-bitiopheneethanol (for derivative PyrTh4 with carboxylic derivatives of pyrene). Reproduced from [ 92 ] with the permission of Elsevier. ( b ) Qualitative comparison of the pyrenyl derivatives’ interaction with SWCNTs as observed by fluorescence quenching of pyrenyl derivatives in SWCNT solution and P3HT/pyrenyl-derivatives/SWCNTs thin solid films.…”

“… Schematic drawing of the ground state minimum of PyrTh4 ( left ) and PyrTh1 ( right ), and of their possible different approaches to the surface of a carbon nanotube. Reproduced from [ 92 ] with the permission of Elsevier. …”

Plasmon‐Assisted Energy Transfer in Hybrid Nanosystems

“…Its flat morphology, moreover, makes it strongly stick onto the SWNTs sidewalls through π–π stacking interactions without the aid of any additional items . Tethered pyrene has been exploited as gluing element to attach functionalities for photoconversion purposes to single‐ and multi‐walled carbon nanotubes . Pyrene, contrarily to perylene and porphyrin, has not been shown to induce radiative emission from the tubes through excitation transfer yet.…”