TY - JOUR A1 - El Malah, T. A1 - Ciesielski, A. A1 - Piot, L. A1 - Troyanov, S.I. A1 - Mueller, U. A1 - Weidner, Steffen A1 - Samorì, P. A1 - Hecht, S. T1 - Conformationally pre-organized and pH-responsive flat dendrons: synthesis and self-assembly at the liquid-solid interface N2 - Efficient Cu-catalyzed 1,3-dipolar cycloaddition reactions have been used to prepare two series of three regioisomers of G-1 and G-2 poly(triazole-pyridine) dendrons. The G-1 and G-2 dendrons consist of branched yet conformationally pre-organized 2,6-bis(phenyl/pyridyl-1,2,3-triazol-4-yl)pyridine (BPTP) monomeric and trimeric cores, respectively, carrying one focal and either two or four peripheral alkyl side chains. In the solid state, the conformation and supramolecular organization were studied by means of a single crystal X-ray structure analysis of one derivative. At the liquid–solid interface, the self-assembly behavior was investigated by scanning tunneling microscopy (STM) on graphite surfaces. Based on the observed supramolecular organization, it appears that the subtle balance between conformational preferences inherent in the dendritic backbone on the one side and the adsorption and packing of the alkyl side chains on the graphite substrate on the other side dictate the overall structure formation in 2D. KW - Dendrons KW - MALDI Massenspektrometrie PY - 2012 U6 - https://doi.org/10.1039/c1nr11434d SN - 2040-3364 SN - 2040-3372 VL - 4 SP - 467 EP - 472 PB - RSC Publ. CY - Cambridge AN - OPUS4-25378 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - El Malah, T. A1 - Rolf, Simone A1 - Weidner, Steffen A1 - Thünemann, Andreas A1 - Hecht, S. T1 - Amphiphilic folded dendrimer discs and their thermosensitive self-assembly in water N2 - Folded dendrimers with peripheral ether side chains show a thermally induced hierarchical aggregation process, in which the transition temperature and the dimensions of the aggregates can readily be tuned via the generation number (see figure). KW - Click chemistry KW - Cotton effect KW - Dendrimers KW - Hierarchical self-assembly KW - Thermochemistry PY - 2012 U6 - https://doi.org/10.1002/chem.201200414 SN - 0947-6539 SN - 1521-3765 VL - 18 IS - 19 SP - 5837 EP - 5842 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-25822 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -