caa a22 4500 378921665 CHVBK 20180305123606.0 cr unu---uuuuu 161128e20040101xx s 000 0 eng 10.1351/pac200476071399 doi (NATIONALLICENCE)gruyter-10.1351/pac200476071399 Dendritic polyphenylazomethines: Synthesis, structure, and metal-assembling function [Elektronische Daten] [K. Yamamoto, Masayoshi Higuchi] Dendritic polyphenylazomethines (DPAs) were synthesized as novel topological polymer ligands with pi-conjugated structures by the convergent method via dehydration of aromatic ketones with aromatic amines in the presence of TiCl4. DPA G4 molecules are revealed to have a sphere-like structure with a 2.3-nm diameter and are regularly assembled without deformation of the molecule on a plate as observed by means of gel permeation chromatography (GPC), molecular modeling, transmission electron microscopy (TEM), atomic force microscopy (AFM), and pi-A measurements. The stepwise radial complexation in DPAs with SnCl2 was observed as a stepwise shift in the isosbestic point in the UV-vis spectra. The number of added equivalents of SnCl2 required to induce a shift was in agreement with the number of imine groups present in the different shells of the DPAs. These spectral changes suggest that the complexation is proceeding in a stepwise fashion from the core imines to the terminal imines of the DPAs, which was further supported by shell-selective reduction (SSR) of the imines. © 2013 Walter de Gruyter GmbH, Berlin/Boston Yamamoto K. Department of Chemistry, Faculty of Science & Technology, Keio University, Yokohama 223-8522, Japan aut Higuchi Masayoshi Department of Chemistry, Faculty of Science & Technology, Keio University, Yokohama 223-8522, Japan aut Pure and Applied Chemistry De Gruyter 76/7-8(2004-01-01), 1399-1408 0033-4545 76:7-8<1399 2004 76 pac https://doi.org/10.1351/pac200476071399 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1351/pac200476071399 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yamamoto K. Department of Chemistry, Faculty of Science & Technology, Keio University, Yokohama 223-8522, Japan aut NATIONALLICENCE 700 1- Higuchi Masayoshi Department of Chemistry, Faculty of Science & Technology, Keio University, Yokohama 223-8522, Japan aut NATIONALLICENCE 773 0- Pure and Applied Chemistry De Gruyter 76/7-8(2004-01-01), 1399-1408 0033-4545 76:7-8<1399 2004 76 pac CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter