4-Tetraphenyl-and 4-tetraphenoxy-substituted meso-tetraphenyltetrabenzoporphyrins. Synthesis and spectral properties

The reactions of 4-phenyl-and 4-phenoxyphthalimide with benzoic acid in the presence of zinc(II) oxide gave zinc complexes of meso-tetraphenyltetra(4-phenylbenzo)porphyrin and meso-tetraphenyltetra(4-phenoxybenzo)porphyrin, respectively, and the latter were treated with hydrochloric acid to isolate the corresponding metal-free prophyrins. Spectral properties of the complexes and ligands were studied.     

Large plastic strains in the problem of high-speed loading of an aluminum ribbon

A method for numerical simulation of the motion of the plane liner in a magnetic compressor based on a combination of the transverse and longitudinal two-dimensional models is proposed. The method permits modeling the interaction of the liner ribbon with the rigid basement for the liner kinematic characteristics close to the experimental ones. Three different model are considered to justify the choice of the mathematical model of an elastoplastic body which would be suitable for solving similar problems. A series of computations is performed, and the results and scope of each of the models are analyzed.     

The spectroscopic investigation of the fluorescence decay time of the anthracene crystal

Using single-photon counting technique measurements of fluorescence decay curves of anthracene crystals have been performed at room and 4.2°K temperatures. Different lifetimes have been found in different emission lines at 4.2°K. The fluorescence rise in some emission lines of intrinsic luminescence has been interpreted as a result of two-step mechanism of excitonic fluorescence of the anthracene crystal.     

Synthesis and properties of 2,3,9,10,16,17,23,24-octakis(3-phenoxyphenoxy)phthalocyanine and its complexes with erbium of diverse structures

Reaction of 4,5-dichlorophthalonitrile with 3-phenoxyphenol led to the formation of 4,5-bis(3-phenoxyphenoxy)phthalonitrile. It has underlain the synthesis of 2,3,9,10,16,17,23,24-octakis(3-phenoxy-phenoxy) phthalocyanine and its single and double deck sandwich complexes with erbium. As show the electron absorption spectra the complexes are dissociated in dichloromethane at concentrations below 1 × 10^–5 mol L^–1.     

Phthalocyanines containing macrocyclic and azo chromophores in the molecule

4-[(Z)-(R)-Diazenyl]phthalonitriles and cobalt phthalocyanines on their basis are synthesized and their electron absorption spectra are studied.     

Operation of a magnetic pulse compressor with electrodynamic acceleration of a liner

Experimental data for the acceleration of plate liners with a magnetic flux electromagnetic compressor are reported. The compressor is designed for peaking the power of current pulses with an initial amplitude of 3 MA. The compression zone of the liner has the form of a stripline, which makes it possible to use one current source both for the acceleration of the liner and for the generation of a magnetic flux in the compression zone. The acceleration dynamics and the deformation of plate liners during an operating cycle of the compressor are studied. In the experiments conducted, the compressor is powered by a capacitor battery. The current amplitude in the output capacitive load rises by 1.6 times, while the pulse narrows twofold. Experimental data are compared with numerical calculation data for the liner material flow, which are found to adequately describe processes taking place in such a compressor.     

Synthesis and Spectral Properties of Nickel Complexes with Low-Symmetry Phenoxy- and Phenylsulfanyl-Substituted and 1,4-Naphthoquinone-Annulated Phthalocyanines

Russian Journal of General Chemistry - Cross-coupling of 4,5-diphenoxyphthalonitrile or 4,5-bis(phenylsulfanyl)phthalonitrile (component A) with imide of anthraquinone-2,3-dicarboxylic acid...     

Geometrical and electronic structure of LaI3 molecule from the gas electron diffraction data and quantum chemical calculations

The saturated vapor over LaI₃ has been studied using the electron diffraction method with mass-spectral monitoring. It was determined that at a temperature 1142(10) K, along with monomer molecules, dimers are present in the vapor in the quantity of 0.7 mol.%. Effective configuration parameters of LaI₃ molecule were obtained: r _g(La-I) 2.961(6) Å, ∠_g(I-La-I) 116.5(9)°, l(La-I) 0.106(1) Å and l(I…I) 0.412(7) Å. A small deviation of the valence angle ∠_g(I-L-I) from 120° can be totally caused by a contraction effect of the distance r _g(I…I) of LaI₃ molecule with planar equilibrium configuration. The electronic structure of LaI₃ molecule was examined by the B3LYP/SDD method. In terms of the NBO-analysis, the participation of lanthanum 4f-AO in bonding orbitals La-I is noted. It is shown that the NBO-analysis describes the bond La-I in LaI₃ molecule as predominantly ionic one with a noticeable covalence component. The energy of the heterolytic bond breakage E(La-I)_het = 1216 kJ/mole was calculated.