Przeglądaj Instytut Chemii Fizycznej PAN według autora "Sashuk, Volodymyr"
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Carboxylated Pillar[5]arene Meets Medicinal Biguanides: Host−Guest Complexes with Alexidine and Phenformin in the Crystal and Solution/Gas Phase
Butkiewicz, Helena; Kosiorek, Sandra; Sashuk, Volodymyr; Zimnicka, Magdalena; Danylyuk, Oksana (American Chemical Society, 2023-10-12)Here we discuss crystal and solution/gas phase complexes of carboxylated pillar[5]arene with two cationic guests, alexi-dine and phenformin, revealing host-guest and assembly curiosities, the role of hydrogen bonding and ... -
Carboxylated Pillar[6]arene Emulates Pillar[5]arene in the Host–Guest Crystal Complexes and Shows Conformational Flexibility in the Solution/Gas Phase
Butkiewicz, Helena; Kosiorek, Sandra; Sashuk, Volodymyr; Zimnicka, Magdalena; Danylyuk, Oksana (American Chemical Society, 2022-12-08)Despite the thriving interest in the aqueous complexation properties of carboxylated pillar[6]arene, its solid state supramolecular chemistry has remained a mystery. Here, overcoming challenging crystallogenesis, we report ... -
Effective screening of Coulomb repulsions in water accelerates reactions of like-charged compounds by orders of magnitude
Kowalski, Adam; Bielec, Krzysztof; Bubak, Grzegorz; Żuk, Paweł J.; Czajkowski, Maciej; Sashuk, Volodymyr; Huck, Wilhelm T. S.; Antosiewicz, Jan M.; Hołyst, Robert (Springer Nature, 2022-10-28)The reaction kinetics between like-charged compounds in water is extremely slow due to Coulomb repulsions. Here, we demonstrate that by screening these interactions and, in consequence, increasing the local concentration ... -
Pursuing the Complete OFF State in Photoswitchable Catalysis
Kravets, Mykola; Flaibani, Matteo; Szewczyk, Magdalena; Possoco, Paola; Sashuk, Volodymyr (ACS Publications, 2023-11-28)Practically, all photoswitchable catalysts exhibit residual activity in the OFF state. Herein, we present a ruthenium initiator with a built-in photoswitch whose metathetical performance is completely shut off by light. ... -
Spectroelectrochemical Behaviour of 1,4-Dimethoxypillar[5] arene (P5A) and its Monomer in Different Organic Solvents
Wiloch, Magdalena Z.; Kuna, Ewelina; Kosiorek, Sandra; Sashuk, Volodymyr; Jönsson-Niedziółka, Martin (Wiley, 2021-03-18)The spectroelectrochemical response of the macrocyclic compound 1,4-dimethoxypillar[5]arene (P5A) and its monomer 1,4-dimethoxybenzene was investigated using cyclic voltammetry combined with UV-Vis spectroscopy. The influence ...