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• W2093157819 startingPage "6757" @default.
• W2093157819 abstract "Two new porphyrin arraysa hexamer and a nonamerhave been synthesized and characterized by elemental analysis as well as mass, 1H NMR, and UV−vis spectroscopic methods. The scheme of construction of these arrays employs a synthetic protocol involving sequential “organic” and “inorganic” reactions conducted, respectively, at the peripheral meso-phenyl ring and the central tin(IV) ion of the porphyrin scaffold. The architecture of the hexamer is such that it is based on a covalently linked tin(IV) porphyrin dimer, with each of the two tin(IV) centers trans-axially ligated to two free-base porphyrins, while the higher homologue features a tin(IV) porphyrin trimer as the basal unit, with its central metalloid ions having two free-base porphyrins as axial ligands. This extended, “axial-bonding”-type architecture of the new arrays has been investigated by the 1H NMR method, which reveals characteristic ring-current-induced shifts and coupling patterns for the resonances due to protons of the axial free-base porphyrin subunits. The presence of any ring−ring (basal−basal, basal−axial, or axial−axial) interaction in these arrays is not obvious from their UV−vis and redox potential data, which are close to those of the corresponding constituent monomeric species. On the other hand, their singlet-state activities are quite different from those of the precursor reference compounds as probed by steady-state fluorescence. The results of the detailed investigations carried out on these hybrid, “bichromophoric” arrays have been interpreted in terms of the occurrence of intraarray, interchromophore energy- and electron-transfer reactions." @default.
• W2093157819 created "2016-06-24" @default.
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• W2093157819 date "2001-11-14" @default.
• W2093157819 modified "2023-09-27" @default.
• W2093157819 title "New Molecular Arrays Based on a Tin(IV) Porphyrin Scaffold" @default.
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• W2093157819 doi "https://doi.org/10.1021/ic010179u" @default.
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