213680-85-4Relevant academic research and scientific papers
Synthesis of oligo(phenylene ethynylene)s with dendrimer "shells" for molecular electronics
Shi, Zi-Fa,Wang, Le-Jia,Wang, Hong,Cao, Xiao-Ping,Zhang, Hao-Li
, p. 595 - 598 (2008/02/02)
Two series of oligo(phenylene ethynylene)s (OPEs) with different dendrimer side groups have been designed and synthesized. The molecules contain thiol groups at both ends to enable interconnection between nanoscale gapped metallic electrodes. The different dendrimer groups act as "shells", allowing tailoring to the nanoscopic environment surrounding the OPE "core". Meanwhile, the dendrimer shells also act as spacers for the precise control of the packing density and intermolecular interaction between the OPE cores.
Supramolecular polymer chemistry: Design, synthesis, characterization, and kinetics, thermodynamics, and fidelity of formation of self-assembled dendrimers
Zeng, Fanwen,Zimmerman, Steven C,Kolotuchin, Sergei V,Reichert, David E.C,Ma, Yuguo
, p. 825 - 843 (2007/10/03)
Dendrimers 1a-d were synthesized in 10 steps from dendrons 4-7, bromobenzene and succinic anhydride. Tetraacids 1e and 1f were prepared in an analogous fashion. The aggregation of 1a-f was studied in solution by size exclusion chromatography (SEC), vapor pressure osmometry (VPO), low angle laser light scattering (LLS), small angle neutron scattering (SANS), and by 1H NMR. The data are consistent with a stable, discrete hexameric aggregate for 1b-d in methylene chloride, non-discrete polymeric aggregates for 1a, 1e, and 1f, and monomers for all compounds in tetrahydrofuran and dimethyl sulfoxide. Kinetic and thermodynamic studies and mixing experiments confirmed the highly cooperative nature of the self-assembly process.
Synthesis of cored dendrimers with internal cross-links
Schultz, Laura G.,Zhao, Yan,Zimmerman, Steven C.
, p. 1962 - 1966 (2007/10/03)
Hydrolytic removal of the core unit and cross-linking of their wedges enables dendrimers to be "cored" (see schematic representation). By internalizing the alkenes, the ring-closing metathesis reaction will "stitch" the dendritic wedges to gather intramolecularly, even at dendrimer concentrations of 10-3M. In contrast peripheral alkenes react intermolecularly at this concentration.
