613257-46-8Relevant academic research and scientific papers
Synthesis of Porphyrin-CdSe Quantum Dot Assemblies: Controlling Ligand Binding by Substituent Effects
Chambrier, Isabelle,Banerjee, Chiranjib,Remiro-Buenama?ana, Sonia,Chao, Yimin,Cammidge, Andrew N.,Bochmann, Manfred
, p. 7368 - 7380 (2015)
Cadmium selenide quantum dots of 2.2-2.3 nm diameter were prepared by phosphorus-free methods using oleic acid as stabilizing surface ligand. Ligand exchange monitored quantitatively by 1H NMR spectroscopy gave an estimate of 30-38 monodentate ligands per nanocrystal, with a ligand density of 1.8-2.3 nm-2. The extent of ligand exchange with macrocycles carrying one or more functional groups was investigated, with the aim of producing nanocrystal-macrocycle conjugates with a limited number of coligands. Metal-free porphyrins are able to sequester the Cd2+ ions from the Cd(oleate)2 outer layer of the nanocrystals. Zinc porphyrin complexes carrying one carboxylate function displace oleate efficiently to give porphyrin/CdSe composites with porphyrins stacked upright on the crystal surface. Porphyrins with four potential ligating sites are able to bind to the crystal surface only if the donors are at the end of sufficiently long and flexible tethers. High-dilution methods allowed the synthesis and isolation of well-defined composites of composition [CdSe{porphyrin}2], where porphyrin = 5,10,15,20-tetrakis{3-(carboxy-n-alkyloxy)phenyl}porphyrinato zinc (n = 5 or 10) and 5,10,15,20-tetrakis{3-(11-undecenyloxythiol)phenyl}-porphyrinato zinc. Comparison of the composition data obtained by 1H NMR spectroscopy with luminescence quenching behavior suggests a dependence of quenching efficiency on the tether length. Luminescence quenching was also observed for porphyrins that, according to 1H NMR results, do not undergo surface ligand exchange.
Surface bottom-up fabrication of porphyrin-terminated metal complex molecular wires with photo-electron conversion properties on ITO
Miyachi, Manko,Ohta, Makiko,Nakai, Misaki,Kubota, Yoshihiro,Yamanoi, Yoshinori,Yonezawa, Tetsu,Nishihara, Hiroshi
, p. 404 - 405 (2008/09/20)
We fabricated photoelectron conversion system with porphyrin-terminated "molecular wires" on an ITO surface synthesized using stepwise metal-terpyridine complexation reactions. The efficiency and the electrode potential singniflcantly depended on the meta
Surface-functionalised nano-beads as novel supports for organic synthesis
Cammidge, Andrew N.,Downing, Stuart,Ngaini, Zainab
, p. 6633 - 6634 (2007/10/03)
A novel polymer support has been prepared in which functional link points are located on the surface of polymer nano-beads; the use of the support has been demonstrated in the syntheses of unsymmetrical porphyrins.
