@article{MTMT:33836118, title = {Reductive dehalogenation and formation of sulfonated quinones in the aqueous reactions between various chloro-1,4-benzoquinones and sulfur(IV)}, url = {https://m2.mtmt.hu/api/publication/33836118}, author = {Kiss, Virág and Kecskeméti, Ádám and Hülvely, Bence Marcell and Tarczali Sarudi, Péter and Csépes-Ruzicska, Luca Judit and Mercs, Fruzsina and Tóth, Ágnes and Fábián, István and Ősz, Katalin}, doi = {10.1080/17415993.2023.2214267}, journal-iso = {J SULFUR CHEM}, journal = {JOURNAL OF SULFUR CHEMISTRY}, volume = {44}, unique-id = {33836118}, issn = {1741-5993}, year = {2023}, eissn = {1741-6000}, pages = {646-665} } @article{MTMT:32754763, title = {Substituent effects on the activation parameters of the reaction between 1,4-benzoquinones and hydrogen peroxide: a combined experimental and theoretical study}, url = {https://m2.mtmt.hu/api/publication/32754763}, author = {Józsa, Éva and Jenei, Laura Barbara and Kégl, Tamás and Ősz, Katalin}, doi = {10.1016/j.molstruc.2022.132916}, journal-iso = {J MOL STRUCT}, journal = {JOURNAL OF MOLECULAR STRUCTURE}, volume = {1261}, unique-id = {32754763}, issn = {0022-2860}, year = {2022}, eissn = {1872-8014} } @CONFERENCE{MTMT:32030026, title = {Redox and photochemical properties of 1,4-benzoquinone derivatives}, url = {https://m2.mtmt.hu/api/publication/32030026}, author = {Jenei, Laura Barbara and Ősz, Katalin}, booktitle = {BOOK OF ABSTRACTS for the 2nd International Conference on Reaction Kinetics, Mechanisms and Catalysis}, unique-id = {32030026}, year = {2021}, pages = {124-124} } @article{MTMT:31788160, title = {A kinetic study of the photooxidation of water by aqueous cerium(IV) in sulfuric acid using a diode array spectrophotometer}, url = {https://m2.mtmt.hu/api/publication/31788160}, author = {Michnyóczki, Judit and Kiss, Virág and Ősz, Katalin}, doi = {10.1016/j.jphotochem.2020.113110}, journal-iso = {J PHOTOCH PHOTOBIO A}, journal = {JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY}, volume = {408}, unique-id = {31788160}, issn = {1010-6030}, abstract = {The photooxidation of water by aqueous cerium(IV) has been investigated in dilute sulfuric acid quantitatively using a diode array spectrophotometer. An overview of experimental data on the speciation of cerium(IV) showed that several different absorbing species are present under almost all conditions, which makes straightforward interpretation of photochemical data very difficult. At submillimolar levels of cerium(IV) in 0.10 mol dm–3 sulfuric acid, a consistent quantum yield of 0.12 for the loss of cerium(IV) could be determined, but even under these conditions, clear evidence of a parallel non-photochemical pathway was obtained. At higher concentrations of the metal ion, significant deviations from the expected direct proportionality between the illumination ratio and the initial rate were confirmed, which can only be interpreted by a complicated system of parallel, coupled photochemical and non-photochemical pathways. The inhibitory effect of aqueous cerium(III) in the process was also demonstrated. Based on indirect evidence, it seems likely that sulfate ion radicals play a significant role in the mechanism.}, year = {2021}, eissn = {1873-2666} } @CONFERENCE{MTMT:32030025, title = {How substituents affect the activation parameters of the reaction between 1,4-benzoquinones and hydrogen peroxide}, url = {https://m2.mtmt.hu/api/publication/32030025}, author = {Ősz, Katalin and Kégl, Tamás and Jenei, Laura Barbara and Józsa, Éva}, booktitle = {BOOK OF ABSTRACTS for the 2nd International Conference on Reaction Kinetics, Mechanisms and Catalysis}, unique-id = {32030025}, year = {2021}, pages = {140-140} } @article{MTMT:31238721, title = {Barometric formulas: various derivations and comparisons to environmentally relevant observations}, url = {https://m2.mtmt.hu/api/publication/31238721}, author = {Lente, Gábor and Ősz, Katalin}, doi = {10.1007/s40828-020-0111-6}, journal-iso = {CHEMTEXTS}, journal = {CHEMTEXTS: THE TEXTBOOK JOURNAL OF CHEMISTRY}, volume = {6}, unique-id = {31238721}, issn = {2199-3793}, year = {2020}, eissn = {2199-3793} } @article{MTMT:3368529, title = {Photochemical processes of 1,4-benzoquinones in aqueous medium}, url = {https://m2.mtmt.hu/api/publication/3368529}, author = {Józsa, Éva and Kiss, Virág and Ősz, Katalin}, doi = {10.1016/j.jphotochem.2018.04.024}, journal-iso = {J PHOTOCH PHOTOBIO A}, journal = {JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY}, volume = {360}, unique-id = {3368529}, issn = {1010-6030}, abstract = {The photochemical reactions in the aqueous solutions of 1,4-benzoquinone, 2-methyl-1,4-benzoquinone, 2,6-dimethyl-1,4-benzoquinone, 2-chloro-1,4-benzoquinone, 2,5-dichloro-1,4-benzoquinone and 2,6-dichloro-1,4-benzoquinone were investigated using three independent monitoring techniques (spectrophotometric, spectrofluorimetric and pH-stat) and two different radiation sources, a LED with emission at 400 nm and an UV-A lamp emitting at 365 nm. The aqueous photoproducts were shown to be the corresponding substituted hydroxyl-quinones and hydroquinones for all the derivatives. Fully quantitative data treatment was used in all of the experiments based on fitting the entire kinetic curved obtained. From these fits, the quantum yield of product formation and reactant loss were determined in each case. In the pH-stat experiments, the effect of pH change was also investigated for some of the derivatives. Generally, aqueous photoreactivity is increased by the presence of electron withdrawing substituents and suppressed by electron donating ones. The pH did not have a very significant influence on the course of the photoreaction alone, but it affected the observations through different acid-base equilibria of the products hydroxyl-quinones and hydroquinones.}, year = {2018}, eissn = {1873-2666}, pages = {166-173} } @inproceedings{MTMT:31250834, title = {REACTION BETWEEN SULFUR(IV) AND CHLORO-1,4-BENZOQUINONES}, url = {https://m2.mtmt.hu/api/publication/31250834}, author = {V., Kiss and L.J., Csépes-Ruzicska and B.M., Hülvely and P., Tarczali-Sarudi and Fábián, István and Ősz, Katalin}, booktitle = {Physical Chemistry 2018 (Proceedings)}, unique-id = {31250834}, year = {2018}, pages = {217-220} } @{MTMT:3226251, title = {QUANTITATIVE KINETIC DESCRIPTION OF THE REDOX (PHOTO)REACTION BETWEEN CERIUM(IV) AND WATER}, url = {https://m2.mtmt.hu/api/publication/3226251}, author = {Kerekes, Péter and Kiss, Virág and Lente, Gábor and Ősz, Katalin}, booktitle = {BOOK OF ABSTRACTS. Mathematics in (bio)Chemical Kinetics and Engineering (MaCKiE) 2017}, unique-id = {3226251}, year = {2017}, pages = {62-63} } @article{MTMT:3177479, title = {Mathematical description of pH-stat kinetic traces measured during photochemical quinone decomposition}, url = {https://m2.mtmt.hu/api/publication/3177479}, author = {Kiss, Virág and Lehoczki, Gábor and Ősz, Katalin}, doi = {10.1039/C6PP00333H}, journal-iso = {PHOTOCH PHOTOBIO SCI}, journal = {PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES}, volume = {16}, unique-id = {3177479}, issn = {1474-905X}, abstract = {Substituted 1,4-benzoquinone (QR) derivatives are photosensitive in aqueous solution and form hydroquinones (QR-H2) and hydroxy-quinones (QR-OH), two weak acids in their photoreaction. For this reason, the kinetics of the photoreaction can be conveniently followed by the pH-stat titration technique. The mathematical description of the kinetic traces measured provides the two main parameters of the photoreaction: the differential quantum yield of the reaction ([capital Phi]) and the ratio of the two photo-products, i.e. the fraction of QR that is converted to QR-OH ([small alpha]). These values are described in this paper for 2,5-dichloro-1,4-benzoquinone at different pH values, together with the detailed mathematical evaluation of the application limits of the pH-stat method for such reactions.}, year = {2017}, eissn = {1474-9092}, pages = {519-526} }