Synthesis of a Large-Cavity Carbazole Macrocycle for Size-Dependent Recognition

A large-cavity carbazole macrocycle (1) is reported through condensation of a long and rigid monomer and paraformaldehyde. 1 exhibits highly selective binding of large-sized tetra(n-propyl) ammonium cation 3+. The complexation...

Влияние дейтерирования на фазовые переходы в (NH-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-VOF-=SUB=-5-=/SUB=-

The (ND4)3VOF5 crystal was grown with a high degree of deuteration (D ~ 92%). Structural and thermophysical studies have been carried out, the parameters of phase transitions have been determined. It was found that the deuteration of the ammonium cation in (NH4)3VOF5 led to a change in the chemical pressure, which was accompanied by an increase in the unit cell volume and an increase in the phase transition temperatures. The baric coefficients dTi / dp were determined and the phase T-p diagram (ND4)3VOF5 was constructed. A decrease in the temperature stability of the initial cubic phase Fm 3m in (ND4)3VOF5, as well as a wedging out of the intermediate monoclinic phase at a lower pressure as compared to (NH4)3VOF5, was found.

SYNTHESIS AND PHYSICOCHEMICAL PROPERTIES OF PROTON IONIC LIQUIDS WITH TETRACHLOROPALLADATE ANION

Синтезированы протонные металлсодержащие ионные жидкости с катионом аммония различной структуры и тетрахлорпалладат анионом. Изучены их физико-химические и спектральные характеристики. Установлено, что замена галогенид-аниона в протонированной соли аммония на комплексный PdCl- анион приводит к повышению температуры плавления комплексов, и наблюдается гипсохромный сдвиг полос поглощения катиона в ИК- и УФ- областях спектра. Proton metal-containing ionic liquids with an ammonium cation of various structures and a tetrachloropalladate anion were synthesized. Their physicochemical and spectral characteristics are studied. It is established that the replacement of the halide anion in the protonated ammonium salt with the complex PdCl- anion leads to an increase in the melting temperature of the complexes, and a hypsochromic shift of the absorption bands of the cation in the IR and UV regions of the spectrum is observed.

Formation of cubic perovskite alloy containing the ammonium cation of 2D perovskite for high performance solar cells with improved stability

We prepared (MA)1−x(FA)xPbI3 (CH3NH3 = MA, HC(NH2)2 = FA) perovskite alloys that contain ethylammonium (CH3CH2NH3+) and benzylammonium (C6H5CH2NH3+) cations with no new additional two-dimensional perovskite phases.