RT Conference Proceedings
T1 Investigation of the long effective conjugation length in defect-free insulated molecular wires
A1 Ruiz-Delgado, María del Carmen
A1 Capel-Ferrón, Cristina
A1 Hernández-Jolín, Víctor
A1 López-Navarrete, Juan Teodomiro
A1 Brambilla, Luigi
A1 Tommasini, Mateo
A1 Milani, A.
A1 Castiglioni, Chiara
A1 Sugiyasu, K.
K1 Química física
AB Due to the “insulation” of the π-conjugated backbones, insulated molecular wires (IMWs) are expected to be applied to various optoelectronic applications and nanotechnology.[1] Recently, Kazunori et al have succeeded in the synthesis of a self-threading polythiophene with a polyrotaxane-like 3D architecture (PSTB, see Figure 1), for which an intrawire hole mobility of 0.9 cm2 V−1 s−1 has been measured.[2] Here, we aim to evaluate the extent of π-conjugation along polythiophene backbones sheathed within defect-free “insulating” layers. A comparison between the experimental Raman spectra of the self-threading oligomers (i.e. 2STB-5STB) and the corresponding PSTB polymer indicates that: (i) the ratio of relative intensities of the two most intense Raman bands (I1375/1445) increases with the elongation of the size chain but does not saturate up to the pentamer, and (ii) π-conjugation spreads over 17–18 thiophene units in the polymer. Whether the effective conjugation length of the polymer is better described by using the long oligomer extrapolation approach[3] or periodic DFT calculations of the polymer is discussed in detailed by exploiting the very recent potentialities of state-of-the-art quantum chemical simulations of vibrational properties for crystalline solids.[
YR 2016
FD 2016-02-17
LK http://hdl.handle.net/10630/11016
UL http://hdl.handle.net/10630/11016
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 22 ene 2026