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New approaches to the selective synthesis of the [2-B10H9I]− anion have been reported based on careful control of the reaction medium acidity. The mechanism of the iodination was proposed and the regioselectivity of electrophilic substitution of the [B10H10]2− anion was explained based on B3LYP-calculations of the potential energy surface of the system using the mixed basis 6-31G∗/LanL2DZ. The obtained compounds were characterized by IR and NMR (1H and 11B) spectroscopy, together with ESI-MS-spectrometry. The crystal structures of (PPh4)2[2-B10H9I] and {(PPh4)2[2-B10H9I]·2C4H8O2} were determined by X-ray diffraction.

New amphiphilic conjugates of porphyrins and cyanine dye Cy5COOH were prepared by the creation of ester or amide bond between Cy5-carboxylic acid and hydroxy- or amino-substituted porphyrins. Study of self-aggregation of these conjugates in aqueous-organic media by dynamic light scattering and UV-VIS spectroscopy showed that the conjugates form micelles in THF–H2O with different ratios.

In this study, the series of A3B-type zinc porphyrin dyes have been synthesized for dye-sensitized solar cells (DSSC). All the received zinc-porphyrin complexes bear different alkyl substituents (none, tert-butyl-, methoxy-, hexyloxy-, dodecyloxy-, a pair of hexyloxy-), bulky electron-donating substituent (diphenylamino) in each of three meso-phenyl rings and carboxylic acid as acceptor/anchoring group. The influence of the number and length of alkyl chains on the photophysical properties and DSSCs photovoltaic performance was investigated, as well as quantum-chemical modeling was carried out. Our results reveal that the alkyl chains length and number affect cell performance. We found that DSSC power conversion efficiency increases with an increase in the length and number of alkyl substituents in the porphyrins. A maximum efficiency of 1.29 % was observed in solar cells with dodecyloxy-substituted zinc porphyrin.

In this work we report on the synthesis of new cationic pyridyl-containing meso-arylporphyrins and their antimicrobial photodynamic activity against Gram-positive (S. aureus) and Gram-negative (E. coli) bacteria in planktonic and biofilm modes of growth. Received compounds were characterized by EAS, fluorescence, 1H, 13C NMR spectroscopy, liquid chromatography and ESI-MS spectra. Their photophysical (absorbance and fluorescence), photochemical (singlet oxygen generation) properties dark and light-induced toxicity were studied. Aggregation behavior of PSs was investigated in the presence of nonionic solubilizers to identify the most effective nanocarrier. Pluronic F-127 polymer micelles appeared the most suitable nanocontainers for the cationic porphyrins solubilization. The structure/biological activity relationships were evaluated. The influence of aliphatic spacer length on the photochemical and biological properties of tetraphenylporphyrin derivatives was estimated. The inclusion of PSs in polymeric micelles of Pluronic F-127 noticeably increased their photodynamic activity. Our research showed that the proposed porphyrin macrocycle design offers strategies for the efficient photosensitizer modification in the field of antimicrobial photodynamic inactivation.

The spectroluminescent properties of the noncovalent assemblies of CdSe semiconductor quantum dots with 5-(4-pyridyl)-10,15,20-tris(4-n-octaoxyphenyl)porphyrin and the efficiency of energy transfer from the quantum dots to the porphyrin molecule by the Forster resonant energy transfer mechanism were evaluated.