Dincalp, HalukKizilok, SevkiIcli, Siddik2019-10-272019-10-2720141053-05091573-4994https://doi.org/10.1007/s10895-014-1372-5https://hdl.handle.net/11454/50169Singlet 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.en10.1007/s10895-014-1372-5info:eu-repo/semantics/closedAccessPerylene diimidePyreneCharge transferG-quadruplex DNASinglet oxygenDPBF methodArticle243917924WOS:00033673310003324596056Q3