Lomonosov Moscow State University, Faculty of Biology, Moscow, 119991, Russia.
Biochemistry (Mosc). 2019 Aug;84(8):911-922. doi: 10.1134/S0006297919080078.
Interaction between upconverting nanoparticles and aluminum octacarboxyphthalocyanine was studied. The efficiency of non-radiative energy transfer from the nanoparticles to phthalocyanine increased with the number of phthalocyanine molecules adsorbed on the nanoparticle, but only up to a certain limit. Further increase in the phthalocyanine concentration resulted in a decrease of its sensitized fluorescence due to the dimerization of dye molecules on the nanoparticle surface. When subjected to infrared irradiation, phthalocyanine molecules in the hybrid complex generated singlet oxygen. The observed effects are of interest in regard to the targeted search for new components of efficient third-generation hybrid photosensitizers.
研究了上转换纳米粒子与八羧基酞菁铝之间的相互作用。纳米粒子向酞菁的非辐射能量转移效率随吸附在纳米粒子上的酞菁分子数增加而增加，但仅增加到一定限度。进一步增加酞菁浓度会由于染料分子在纳米粒子表面的二聚化而导致其敏化荧光的降低。当受到红外辐射时，杂化配合物中的酞菁分子产生单线态氧。观察到的这些效应对于有针对性地寻找高效第三代杂化光敏剂的新组分具有重要意义。
