Synthesis and spectral properties of new planar binuclear phthalocyanines sharing the benzene ring

New planar binuclear phthalocyanines sharing the benzene ring were synthesized and their spectral properties were studied. Intense absorption in the near-IR region (∼850 nm) was observed for the first time. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1112–1115, July, 2006.     

Unusual self-assembled nanoaggregation of the thermally stable metal-free slipped-cofacial J-type phthalocyanine dimer

Nanoaggregation of the thermally stable bis(2-hydroxy-9(10),16(17),23(24)-tri-tert-butylphthalocyanine) of J-type was observed by the field emission scanning electron microscopy (FE-SEM). Ordered phases, represented as threads composed of about 200 nm diameter circles were discovered, unlike the parent dimeric magnesium complex, in which similar circles combine together to give visually distinguishable zones with widths of about 600 nm and the same distance between them.     

Synthesis and spectroscopic properties of new boron subphthalocyanine complexes and a heteronuclear phthalocyanine complex

New boron μ-chloro-and μ-alkoxyhexabutylsubphthalocyanines were synthesized. A heteronuclear complex containing both the phthalocyanine and subphthalocyanine fragments was prepared. The spectroscopic properties of these compounds were studied. Dedicated to Academician N. S. Zefirov on the occasion of his 70th birthday. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 2020–2023, September, 2005.     

Structural modification of unsymmetrically substituted monophthalocyanines by nucleophilic reactions

New 2-nitro-substituted phthalocyanine zinc complexes were synthesized. The nucleophilic substitution of the NO₂ group was used for the first time for the structural modification of unsymmetrically substituted monophthalocyanines. The electronic absorption spectra of phthalocyanines were studied. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 2036–2040, September, 2005.     

Synthesis and spectroscopic properties of new water-soluble phthalocyanines containing pyridinium hydrochloride fragments

New 2,9,16,23-tetra[o-(hydroxymethyl)benzyloxy]-substituted phthalocyanines were synthesized. Their reaction with 4-bromopyridine afforded 2,9,16,23-tetra[o-(4-pyridyloxymethyl)benzyloxy]-substituted analogs, treatment of which with HCl led to water-soluble pyridinium salts. Spectroscopic properties of the phthalocyanines obtained were studied and a hypsochromic shift of the Q-band of the hydrochloride as compared with the corresponding pyridinium analogs was observed. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2350–2354, December, 2007.     

Synthesis of new lanthanide naphthalocyanine complexes based on 6,7-bis(phenoxy)-2,3-naphthalodinitrile and their spectral and electrochemical investigation

A number of naphthalocyanine and dinaphthalocyanine complexes of the rare-earth elements based on 6,7-bis(phenoxy)-2,3-naphthalodinitrile obtained for the first time has been synthesized and their spectral properties have been investigated. Electrochemical behavior of lutetium [bis(octaphenoxy)naphthalocyanine] in the thin hydrophobic films has been studied. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1879–1885, September, 2008.     

Steady streaming around a spherical drop displaced from the velocity antinode in an acoustic levitation field

The steady (acoustic) streaming associated with a sphericaldrop displaced from the velocity antinode of a standing waveis studied. The ratio of the particle size to the acoustic wavelengthis treated as small but non-zero, and the solution is developedin the form of a two-term expansion in terms of the correspondingsmallness parameter. The drop viscosity is assumed to be muchhigher than that of the surrounding fluid, which is the casefor a drop in a gas medium. There are essentially three distinctregions where the steady streaming flow is analysed: insidethe drop (internal circulation), in the Stokes shear-wave layerat the surface on the gas side, and the gas outside the Stokeslayer (the outer streaming region). Solutions for the internalcirculation and the outer streaming are obtained in the limitof small Reynolds number. Despite the gas-to-liquid viscosity ratio being small, the outerstreaming may be dramatically affected by the fact that thesphere is liquid as opposed to solid. The parameter that measuresthe effect of liquidity is essentially the viscosity ratio dividedby the relative (to the particle size) thickness of the Stokeslayer. The case of a solid sphere is recovered by letting thisparameter go to zero.