No abstract available

[en] Photoreduction of AlBr-, GaBr-, InBr- tetraphenylporphins was studied. Photoreduction proceeds in three photochemical stages as has been demonstrated using as the example InBr-tetraphenylporphin. In the first stage of photochemical reduction formation of product takes place (regenerating the initial pigment during interaction with O₂) which transforms into chlorine under influence of two different by energy light quantum

No abstract available

[en] In Raman spectrometry, the potassium halogenoindate compounds have very low frequency vibrational spectra which allows nevertheless an unambiguous identification. Knowing the X-Ray structure of the potassium bromoindates associated with the similar studies realized on the chloride homologous as well as the depolarization ratio measurements of the bands on K₃InBr₆,1,5H₂O and K₂(InBr₅H₂O) single crystals, the assignment of the observed vibrational modes has been detailed. For the other stable hydrated forms of the InBr₃-KBr-H₂O diagram, a localization of the principal internal modes is proposed

No abstract available

[en] Rotational analysis of the 0-0, 1-0, 2-1 and 3-2 bands of the A³π₀-X¹Σ⁺ subsystem and of the 0-0, 1-0, 2-1, 6-5, 7-6 and 8-7 bands of the B³π₁-X¹Σ⁺ subsystem has been performed. Rotational constants of ¹¹⁵In⁷⁹Br and ¹¹⁵In⁸¹Br have been calculated using a direct approach procedure and the least squares method. Vibrational constants of the A, B and X states of ¹¹⁵In⁷⁹Br and ¹¹⁵In⁸¹Br have been determined from band origins. (orig.)

[en] Methods of chemical, differential thermal and X-ray phase analyses are used to study peculiarities of antimony reduction from the melt of its tribromide by indium monobromide. State diagrams of InBr₃-Sb, InBr_3SbBr₃ and SbBr₃-In systems are plotted. Antimony solubility in the melts of InBr₃+SbBr₃ and InBr₃+InBr mixtures is studied

[en] The paramagnetic resonance spectra of indium, aluminium and gallium bromide solutions in isopropylacetate, isopropylformate and isopropylmonochloroacetate are investigated. It is shown, that in indium and gallium bromide solutions (unlike aluminium bromide) the solvent molecular splitting in the ''alkyl - hydrogen'' bond is not observed. Consequently, the Lewis acid strengthening contributes to ester splitting. The equation, permitting to prognosticate the process of ''alkyl - hydrogen'' splitting reaction according to the values of dipole moments of the Lewis acid complexes with esters has been suggested

No abstract available

[en] Self-trapped exciton (STE) emission of low-dimensional metal halides has witnessed explosive developments in both display and illumination, due to its intriguing photoluminescence properties. As one typical feature, STE emission energy is commonly independent of excitation wavelength. Herein, a rare phenomenon of inverse excitation-dependent dual-band emission is achieved on 0D Cs${}_2$InBr${}_5$·H${}_2$O. Under initial compression, the contraction of inhomogeneously coordinated InBr5O octahedra gives rise to blue-shifted STE emission with the decreased Stokes shift. As the phase transition occurs under higher pressure, considerable octahedral distortions generate a new defect-related localized exciton emission. Notably, the high-energy emission from the intrinsic STE state is only observed under the low-energy excitation, which is believed to originate from the excitation-dependent multiple excited states in high-pressure Cs${}_2$InBr${}_5$·H${}_2$O. (© 2021 Wiley-VCH GmbH)