Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 9, Issue 8, Pages 1775-1781Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200390204
Keywords
chirality; helical structures; nanostructures; polymers; porphyrin arrays
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Well-defined arrays of porphyrins attached to a rigid polyisocyanide backbone have been synthesized and their physical and optical properties studied. The helical polymers are rigidified by an inter-side chain hydrogen-bonded network and have an average mass of 1.1 x 10(6) Daltons and a polydispersity index of 1.3. Each of the polymer strands contains four columns of around 200 stacked porphyrins and has an overall length of 87 nm. The chromophores are arranged in a left-handed helical fashion along the polymer backbone. Photophysical studies show that at least 25 porphyrins within one column are excitationally coupled.
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