Self-aggregation of synthetic zinc 21-hydroxy-121/131-oxo-porphyrins
摘要:
Zinc complexes of 2(1)-hydroxy-12(1)/13(1)-oxo-porphyrins were prepared by modifying octaethylporphyrin as models of self-aggregative chlorophylls found in extramembranous antennas of green photosynthetic bacteria. Their visible absorption spectra showed that less hindered interactive groups, such as CH,OH and CHO in a synthetic zinc porphyrin molecule were necessary for their self-aggregation in non-polar organic solvents. Zinc 2-hydroxymethyl-12-formyl-porphyrin self-aggregated to form larger oligomers with red-shifted broad visible bands than the 2,13-regioisomer, indicating that the linear location of OH, Zn and C=O in a molecule is requisite for similar self-aggregation with natural systems. (C) 2003 Elsevier Ltd. All rights reserved.
Self-aggregation of synthetic zinc 21-hydroxy-121/131-oxo-porphyrins
摘要:
Zinc complexes of 2(1)-hydroxy-12(1)/13(1)-oxo-porphyrins were prepared by modifying octaethylporphyrin as models of self-aggregative chlorophylls found in extramembranous antennas of green photosynthetic bacteria. Their visible absorption spectra showed that less hindered interactive groups, such as CH,OH and CHO in a synthetic zinc porphyrin molecule were necessary for their self-aggregation in non-polar organic solvents. Zinc 2-hydroxymethyl-12-formyl-porphyrin self-aggregated to form larger oligomers with red-shifted broad visible bands than the 2,13-regioisomer, indicating that the linear location of OH, Zn and C=O in a molecule is requisite for similar self-aggregation with natural systems. (C) 2003 Elsevier Ltd. All rights reserved.
Second generation tumour photosensitisers: the synthesis of octa-alkyl chlorins and bacteriochlorins with graded amphiphilic character
作者:Raymond Bonnett、Alexander N. Nizhnik、Morris C. Berenbaum
DOI:10.1039/c39890001822
日期:——
Two series of polyhydroxy derivatives of hydroporphyrins are synthesised which have the hydroxy substituents at β-positions, or in a side chain: these amphiphilic systems are tested in vivo as tumourphotosensitisers, and some are found to be very effective.