V. S. Tyurin

Palladium nanoparticles stabilized by a copolymer of N-vinylimidazole with N-vinylcaprolactam as efficient recyclable catalyst of aromatic cyanation

A new recyclable catalytic system was developed based on palladium nanoparticles and a copolymer of N-vinylimidazole and N-vinylcaprolactam for cyanation of aromatic bromides. The source of the cyanide ion was a nontoxic potassium hexacyanoferrate.

Poly(N-vinylimidazole) as an efficient and recyclable catalyst of the aza-Michael reaction in water

Poly(N-vinylimidazole) effectively catalyzed Michael addition of 1H-1,2,4-triazole, 3,5-dimethyl-1H-1,2,4-triazole, uracil, oxazolidin-2-one, and succinimide to but-3-en-2-one, cyclohex-2-en-1-one, methyl acrylate, and methyl vinyl sulfone in water at room temperature. The catalyst can readily be regenerated and repeatedly used at least five times without loss in activity, as shown in the reaction of 1H-1,2,4-triazole with but-3-en-2-one as an example.

Study of supramolecular assembly of porphyrins functionalized with cyano- and ester groups in coordination with transition metal salts and bidentate ligands

New peripherically functionalized porphyrins and their metallocomplexes are synthesized and studied using spectral analysis techniques (EAS, 1H, 13C NMR) in the processes of supramolecular assembly with transition metal salts and exobidentate ligands. Formation of coordination porphyrin dimers is shown.

Femto-picosecond relaxation of triazole-bridged bis(zinc porphyrin)

The femtosecond dynamics of excitation relaxation has been revealed for the zinc porphyrin dimer using the pump-probe technique. The data obtained have been analyzed with the use of quantum-chemical calculations. The excitation relaxation dynamics shows that systems of this kind hold promise as models for investigation of photosystems and development of artificial analogues of natural photosynthetic centers. A model has been proposed to explain the found coherent dynamics of exciton bands.

Supramolecular bisporphyrin cages: Design and ways of self-assembly of supramolecular bisporphyrin structures for molecular nanomotors and nanosensors

Self-assembly of supramolecular ensembles of coordination bisporphyrins was studied in reactions of meso-tetrakis(3-hydroxyphenyl)porphyrinatozinc with LaCl3, MnCl2, CrCl3, and SnCl2 and exodentate ligands (1,4-diazabicyclo[2.2.2]octane and 4,4’-bipyridyl). A design and ways of self-assembly of bisporphyrins structures were developed.

Synthesis of supramolecular complexes based on tetracrown–substituted zinc porphyrinates

New metal-porphyrin receptors functionalized by aza-crown-ether groups were synthesized. Main paths of supramolecular self-assembly of porphyrin aza-crown-ether conjugates to bis-porphyrin sandwich complexes with metal and ammonium cations were studied using spectral methods of analysis (EAS, 1H, 13CNMR, MALDI-ToF mass spectrometry). Principal regularities of axial coordination of the obtained bis-porphyrin complexes with exobidentate ligands (1,4-diazabicyclo[2.2.2]octane and pyrazine) were studied.

Synthesis of functionally substituted metalloporphyrin receptor and study of their supramolecular properties

The ways of supramolecular self-assembly of metalloporphyrins containing peripheral ligand groups with metal cations and exobidentate ligands are studied.

Supramolecular Self-Assembly of 5,10,15,20-Tetrakis- (3-hydroxyphenyl)porphyrinatozinc with Some Transition Metals and Bidentate Ligands

Coordination interactions between 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrinatozinc(II) and transition metal chlorides [La(III), Mn(II), Cr(III), Sn(II)], 1,4-diazabicyclo[2.2.2]octane, and 4,4′-bipyridine were studied. Self-assembly of supramolecular bis-porphyrin structures was developed.

Femtopicosecond relaxation of zinc porphyrinate trimer linked by the triazole bridge

The femtosecond dynamics of excitation relaxation of the zinc porphyrinate trimer was studied by the pumping—scanning method. The obtained results were examined using semi-empirical quantum chemical calculations. The dynamics of excitation relaxation shows that the application of similar systems as models for studying photosystems and development of artificial analogs of natural photosynthetic centers is promising. An explanation for the observed coherent dynamics of exciton bands was proposed.