期刊
JOURNAL OF FLUORESCENCE
卷 24, 期 3, 页码 917-924出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-014-1372-5
关键词
Perylene diimide; Pyrene; Charge transfer; G-quadruplex DNA; Singlet oxygen; DPBF method
资金
- Research Council of Celal Bayar University [BAP/2007-006, 2010-050]
Singlet oxygen quantum yields (I broken vertical bar (Delta)) of different perylene diimides (PDIs) containing phenyl (PDI-Ph), pyrene (PDI-Pyr), and indole (PDI-In) units in bay positions of the ring were determined using 1,3-diphenylisobenzofuran (DPBF) method in toluene/methanol (99:1) system. Pyrene-substituted PDI were the most efficient singlet oxygen generator among the investigated photosensitizers with a quantum yield of I broken vertical bar (Delta) = 0.93 in toluene/methanol. Additionally, their binding affinities to G-quadruplex DNA structure were investigated by steady-state measurements. There were marked red shifts of absorbance bands for PDI-Pyr/DNA strand complexes with respect to the absorption maxima of DNA-free solution of PDI-Pyr in phosphate buffer at pH 6.
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