The kinetics of photocurrent generated in the photoelectrochemical cell (PEC) with phthalocyanine (Pc) dyes in the microsecond time scale was discussed. The shape of the kinetics is rather complex and it was discussed in terms of molecular phenomena and electrochemical processes occurring after laser flash illumination. Time constants were calculated from the photocurrent decay curves and at least three time components were well recognized (rise

The photoelectric and electric properties of two newly synthesized metal-free phthalocyanines when substituted with short and long alkyl chains dissolved in dimethyl sulfoxide are reported. The influence of the dye aggregation on photocurrent generation by dyes immersed in a photoelectrochemical cell based on In2O3 or SnO2 electrodes is examined. The participation of the dye singlet and triplet states in charge separation process is discussed and

Nanomedicine is the application of nanotechnology to the diagnosis and treatment of human disease. This discipline has the potential to change medical science dramatically, for example as demonstrated by an innovation in cancer imaging that uses novel diagnostic agents synthesized from nanoparticles. Some research on cluster-based materials for future medical applications is described in this paper. The design of a multifunctional photosensitive

In this contribution the spectroscopic and photoelectric properties of newly synthesized phthalocyanine dyes are presented. Phthalocyanines are substituted with long alkyl chains which increase non-radiative relaxation and triplet state population in excited states deactivation of molecules. The dyes are dissolved in DMSO and embedded in a photolectrochemical cell (PEC) constructed of metallic (Au) ans semiconducting (In2O3 or SnO2) electrodes. The

Metal-free and magnesium phthalocyanines substituted with long (CH2CH2N+(CH3)3CH3SO4-) chains and amino/nitro groups have been investigated as photoconverters in a sandwich-like photoelectrochemical cell. Photoelectric (photovoltaic spectrum, photocurrent kinetics), electric (current±voltage characteristics) and spectroscopic studies (absorption, Øuorescence, photoacoustics) have been presented. Magnesium phthalocyanine with amino group has been

Ocular neovascular disease represents an important cause of blindness today. In this paper, was used a model to evaluate the vaso-occlusive potential of photodynamic therapy with B2 vitamin. Neovascularization induced in an occular cornea consists of an easily accessible monolayer-like neovascular net within a transparent matrix. This fact allows studying the efficiency of occlusion in an isolated neovascular structure. This study is a requirement

Imensul potential al porfirinelor pentru aplicatii medicale si biologice, implica metode sintetice de dezvoltare a elaborarii porfirinelor cu proprietati fotofizice si fotochimice extinse si versatile. Porfirinele sintetice solubile in apa apar ca bune modele pentru crearea de noi medicamente eficiente pentru terapia fotodinamica a cancerului (PDT). La iradiere, porfirinele utilizate ca medicamente induc clivajul ADN in principal prin mecanism de