RT info:eu-repo/semantics/article
T1 Self-assembly and ambipolar charge transport in columnar phases of polynuclear gold isocyano–triphenylene complexes
A1 Tritto, Emiliano
A1 Donnio, Bertrand
A1 Shah, Asmita
A1 Singh, Dharmendra Pratap
A1 Domingo de la Rubia, Estela de
A1 García Moreno, Gregorio José
A1 Coco Cea, Silverio
K1 Química inorgánica
AB An uncommon approach to the synthesis of ambipolar semiconductors based on di- and tri-nuclear gold isocyano-triphenylene complexes of the formula [(AuX)n(CN-C6H4-O-(CH2)6)n-TriPh] (n = 2, 3; X = Cl, C 00000000000000000 00000000000000000 00000000000000000 01111111111111110 00000000000000000 01111111111111110 00000000000000000 01111111111111110 00000000000000000 00000000000000000 00000000000000000 C-Ph) is described. Although mesomorphism has only been obtained with chloro derivatives, the trialkynyl complex has turned out to be a precursor of gold nanoparticles. The chloro complexes self-assemble in lamello-columnar phases, whose supramolecular organizations were confirmed by SAXS/WAXS experiments. Both the tri(chloro-gold) and the di(chloro-gold) complexes display high ambipolar charge transport along the columnar stacking direction, either in the mesophase (trichloro derivative) or in the crystalline solid state (dichloro complex). The analysis of ambipolar charge transport in the chloro-gold compounds has been performed using the time-of-flight (ToF) technique. The dichloro compound exhibits an ambipolar charge carrier mobility of the order of 10−4 cm2 V−1 s−1, whereas the trinuclear compound displays an ambipolar charge carrier mobility of the order of 10−3 cm2 V−1 s−1, which is attributed to the addition of a supplementary peripheral -NC-Au-Cl complex unit, offering a drift field to the charge carriers and a lower optical bandgap. Quantum chemical calculations show that the introduction of an additional -NC-Au-Cl fragment to the dinuclear complex to give the trinuclear derivative promotes a cofacial stacking of the molecules, which increases the mobility of the charge carriers of the system. Due to their ambipolar charge carrier mobility, the poly-nuclear gold isocyano-triphenylene complexes demonstrate their potential for use in organic electronics and optoelectronic devices.
PB Royal Society of Chemistry
SN 2050-7526
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/76962
UL https://uvadoc.uva.es/handle/10324/76962
LA spa
NO Journal of Materials Chemistry C, 2025, vol. 13
NO Producción Científica
DS UVaDOC
RD 01-ago-2025