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.

Tuning the aggregation behaviour of BN-coronene diimides with imide substituents and their performance in devices (OLEDs and OFETs)

The lateral CC-π-extension of perylene diimides (PDIs) to coronene diimides (CDIs) leads to undesired effects such as the decrease of the absorption and a hypsochromic shift. This could be overcome by lateral BN-annulation of PDIs to form superior BNCDIs.

Supramolecular assembly and spectroscopic characterization of indolenine–barbituric acid zwitterions

The intermolecular hydrogen bonding of barbiturates assists in the supramolecular aggregation and a hypsochromic shift is shown in protic solvents.

SYNTHESIS AND SPECTRAL CHARACTERISTICS OF PERSPECTIVE NANOSIZED CARBON QUANTUM DOTS FOR ADSORPTION AND CATALYTIC PROCESSES

Processes of interaction between carbon quantum dots (CQDs) and solutions of rhodium, ruthenium and palladium chlorides in the surface layer have been investigated by electron and IR spectroscopy. When rhodium chloride is added to a solution of CQDS, a bathochromic shift of the β- and p-absorption bands (ABs) at 48725 and 41711 cm-1 as well as hypsochromic shift of the α-AB at 28935 cm-1 indicate that rhodium adsorption occurs on the surface of CQDs. The bathochromic shift of the absorption bands at 22400 сm1 together with the hypsochromic shift of ABs corresponding to d-d electron transitions in the metal ions indicates the formation of rhodium with CQDs. When ruthenium and palladium chlorides are added to an aqueous solution of CQDs, the intensive of ABs characterizing the complex anions [RuCl6]3-, [RuCl6]2- or [PdCl4]2- are absent in the UV-Vis spectra. This indicates the passage of adsorption processes of metals on the surface of CQDs. The present of ABs (at 27055 and 25125 сm-1) indicate the trivalent state of ruthenium ion; the p-ABs bathochromic shift as well as α-ABs hypsochromic shift indicates the probable complex formation of CQDs with Ru3+ ions. The change in the position of the absorption bands of d-d electron transitions (at 25448 сm1) together with the bathochromic shift of p-ABs and hypsochromic shift of α-ABs indicates a change in coordination environment in the palladium ion with the possible formation of Pd → N bond. The IR-spectra data of CQDs showed the presence of a number of characteristic ABs for functionalized CQDs: ν(N–H) at 3260 сm1, (C=O) at 1830, 1840 and 1850 сm1, –С=O(NH) at 1770 сm1, ν(C=N) at 1680 and δ(N–H) at 1640 сm1, which confirms the coordination of metals on the surface of CQDs.

Naphtho- and anthra-disilacyclobutadienes

Naphthodisilacyclobutadiene and anthradisilacyclobutadiene exhibit a paratropic character due to the fused 1,2-disilacyclobutadiene moiety and a hypsochromic shift despite π-elongation.

New photochromic salt spiropyrans of indoline series

The synthesis and study of the structure and photochromic properties of the new salt spiropyrans of the indoline series containing chlorine and bromine atoms as a substituent at the 6' position in 2H-chromene moiety are presented. The structure of the obtained compounds was confirmed by NMR 1H spectroscopy and X-ray diffraction analysis. The compounds are photochromic; the long-wavelength maximum of the absorption band of their open photoinduced form has a significant hypsochromic shift, and the lifetime substantially increases in comparison with the fluorine analog.