Self-Assembled Conjugated Thiophene-Based Rotaxane Architectures: Structural, Computational, and Spectroscopic Insights into Molecular Aggregation (pages 834–844)
Leszek Zalewski, Sergio Brovelli, Massimo Bonini, Jeffrey M. Mativetsky, Michael Wykes, Emanuele Orgiu, Thomas Breiner, Marcel Kastler, Florian Dötz, Francesco Meinardi, Harry L. Anderson, David Beljonne, Franco Cacialli and Paolo Samorì
Article first published online: 13 DEC 2010 | DOI: 10.1002/adfm.201001135
Molecular aggregation can be tuned by rotaxination. A conjugated bi-thiophene-based rotaxane and its corresponding dumbbell undergo different self-assembly pathways at surfaces. The dumbbell exhibited a greater propensity to form ordered supramolecular assemblies, as a result of π–π interactions, which are hindered in the rotaxane, as revealed by STM, AFM, and steady-state and time-resolved photoluminescence experiments corroborated by molecular modelling.