Showing papers by "Ibro Tabakovic published in 1997"
TL;DR: In this article, the structure and loading of poly(amidoamine) dendrimers were determined by vis, IR, and NMR spectroscopies, elemental analysis, and coulometric analysis.
Abstract: Poly(amidoamine) (PAMAM) dendrimers, generations 1−6, were peripherally modified with cationically substituted naphthalene diimide groups. Several monomeric diimides were also prepared as models. The structure and loading of the dendrimers were determined by vis, IR, and NMR spectroscopies, elemental analysis, and coulometric analysis. In general it was possible to obtain loadings greater than 70% even from generation 6 dendrimer where there are 192 amine groups to be substituted. These polymers and monomers were reduced using sodium dithionite or electrochemically with one electron per imide group converting each imide into its anion radical. Near-infrared (NIR) spectroscopy showed that in D2O or formamide solutions the anion radicals aggregated into π-dimers and π-stacks. Cyclic voltammograms are interpreted in terms of anion radical aggregation and precipitation of the reduced dendrimers. The CV and NIR results for the various dendrimer generations were quite similar. These results allow insight into t...
48 citations
TL;DR: In this paper, 4,4′-Dithienyl-4″-4-bromotriphenylamine or 4, 4′, 4-trithienyltriphenylonitriitrioultriphenyl-polysilicon (THP) was oxidized on indium-tin oxide (ITO) electrodes providing linear and starburst oligomers by thiophene coupling reactions, which were used as light-emitting diodes.
20 citations
TL;DR: In this article, a review of the anodic synthesis of heterocyclic compounds is presented, which deals with the recent advances in anodic oxidations in which homogeneous and heterogeneous anodic compounds were synthesized through carbon-heteroatom and heteroatom-hetero-oatom bond formation.
Abstract: This article discusses the anodic synthesis of heterocyclic compounds that have appeared during the last decade. The mechanistic aspects involving intramolecular, intermolecular cyclizations and the homogeneous vs heterogeneous anodic oxidations were considered. This review deals with the recent advances in anodic oxidations in which heterocyclic compounds were synthesized through carbon-heteroatom and heteroatom-heteroatom bond formation.
15 citations
11 citations
TL;DR: In this article, cyclic voltammetry, coulometry and vis spectroscopy were used to investigate the reactivity of α-Oligothiophenes and dications.
10 citations