期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 6, 期 22, 页码 4157-4166出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b810171j
关键词
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资金
- Grant-in-Aids for Young Scientists [18685020]
- Exploratory Research [19657071]
- Ministry of Education, Culture, Sports, Science and Technology of Japan
Water soluble N-confused porphyrins, 5,10,15,20-tetrakis(alpha-pyridinio-p-tolyl)-2-aza-21-carbaporphyrin (pPyNCP) and its N-methyl derivative, 2-N-methyl-5,10,15,20-tetrakis(alpha-pyridinio-p-tolyl)-2-aza- 21-carbaporphyrin (NMe-pPyNCP), have been synthesized by introducing cationic side-arms at the meso-positions of N-confused porphyrin. Their acid - base properties (pK(1-4)) and DNA-binding ability in aqueous solutions were elucidated in comparison with the corresponding porphyrin derivative. Photophysical behaviors of pPyNCP were largely influenced by buffer compositions and DNA structures, whereas NMe-pPyNCP is considerably robust against these factors. In addition, significant enhancement of the fluorescence was observed with NMe-pPyNCP by the addition of DNA. The unique properties of pPyNCP and NMe-pPyNCP stem from the confused pyrrole rings in the macrocycle.
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