Investigation of the aluminum phthalocyanine nanoparticles colloidal solutions pH-dependent photoluminescence kinetics in pico- and nanosecond time range

5th International Conference of Photonics and Information Optics

Bystrov, F.G.^1 ; Makarov, V.I.^2 ; Loschenov, V.B.^1,2

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe shosse 31, Moscow

115409, Russia^1

Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Str. 38, Moscow

119991, Russia^2

关键词: Aluminum phthalocyanine;    Biological tissues;    Colloidal solutions;    Fluorescence decays;    Fluorescence intensity decays;    Fluorescence lifetimes;    Phthalocyanine molecules;    Temporal resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/737/1/012051/pdf
DOI  :  10.1088/1742-6596/737/1/012051

来源: IOP

【 摘 要 】

In this study, the fluorescence intensity decay of aluminum phthalocyanine nanoparticles colloidal solutions at different pH was investigated. Hamamatsu Streak-Camera (C10627 - 13 Hamamatsu Photonics) with picosecond temporal resolution (15 ps) was used to carry out the measurements. For excitation we used Hamamatsu Picosecond Light Pulser PLP - 10 with 637 nm wavelength and 65 ps pulse duration. The changes in fluorescence decay kinetics were found during the experiment. The number of fluorescence lifetime components and duration of lifetimes depends on pH. At pH 2 the presence of two fluorescence lifetimes was recorded: the first one was 5 ns, which corresponded to the molecular form in solution, and 1.5 ns, which corresponded to bound state of phthalocyanine molecules. This work is a preparatory step towards a model which describes the interaction of aluminum phthalocyanine nanoparticles with environment in biological tissue.