title: Multiporphyrin arrays on cyclotriphosphazene scaffolds.
abstract: We report the synthesis of first examples of hexaporphyrin and dodecaporphyrin assemblies on cyclotriphosphazene scaffold by adopting two different approaches based on Ru-pyridyl "N" coordination in decent yields. The multiporphyrin assemblies were confirmed by (31)P, (13)C, (1)H, (1)H-(1)H COSY, and NOESY NMR spectroscopic studies. The absorption studies showed 2-fold intensity enhancement with negligible changes in peak maxima compared to porphyrin monomers. The redox potentials of multiporphyrin assemblies showed the redox features of the constituted porphyrin monomers and supported weak interactions among the porphyrin units in noncovalent hexaporphyrin and dodecaporphyrin arrays.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai 400 076, India.
authors.forename: Tejinder
authors.initials: T
authors.lastname: Kaur
authors.forename: Malakalapalli
authors.initials: M
authors.lastname: Rajeswararao
authors.forename: Mangalampalli
authors.initials: M
authors.lastname: Ravikanth
mesh_terms: D006573:Heterocyclic Compounds, 1-Ring / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008665:Metalloporphyrins / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D009943:Organophosphorus Compounds / Q000737:chemistry*
chemical_list: D006573:Heterocyclic Compounds, 1-Ring; D008665:Metalloporphyrins; D009943:Organophosphorus Compounds