TY - JOUR AU - Kiss, Virág AU - Kecskeméti, Ádám AU - Hülvely, Bence Marcell AU - Tarczali Sarudi, Péter AU - Csépes-Ruzicska, Luca Judit AU - Mercs, Fruzsina AU - Tóth, Ágnes AU - Fábián, István AU - Ősz, Katalin TI - Reductive dehalogenation and formation of sulfonated quinones in the aqueous reactions between various chloro-1,4-benzoquinones and sulfur(IV) JF - JOURNAL OF SULFUR CHEMISTRY J2 - J SULFUR CHEM VL - 44 PY - 2023 IS - 6 SP - 646 EP - 665 PG - 20 SN - 1741-5993 DO - 10.1080/17415993.2023.2214267 UR - https://m2.mtmt.hu/api/publication/33836118 ID - 33836118 LA - English DB - MTMT ER - TY - JOUR AU - Józsa, Éva AU - Jenei, Laura Barbara AU - Kégl, Tamás AU - Ősz, Katalin TI - Substituent effects on the activation parameters of the reaction between 1,4-benzoquinones and hydrogen peroxide: a combined experimental and theoretical study JF - JOURNAL OF MOLECULAR STRUCTURE J2 - J MOL STRUCT VL - 1261 PY - 2022 PG - 7 SN - 0022-2860 DO - 10.1016/j.molstruc.2022.132916 UR - https://m2.mtmt.hu/api/publication/32754763 ID - 32754763 N1 - Funding Agency and Grant Number: European Union; State of Hungary; European Social Fund [TA-MOP 4.2.4. A/2-11-1-2012-0001]; Higher Education Institutional Excellence Programme of the Ministry of Human Capacities in Hungary [TA-MOP 4.2.4. A/2-11-1-2012-0001]; [NTP-HHTDK-20-0056]; [2020-4.1.1-TKP2020] Funding text: The research work performed by Eva Jozsa for this manuscript was supported by the European Union and the State of Hungary, co-financed by the European Social Fund in the framework of TA-MOP 4.2.4. A/2-11-1-2012-0001 "National Excellence Program". This work was supported by NTP-HHTDK-20-0056. This work was supported by the Higher Education Institutional Excellence Programme of the Ministry of Human Capacities in Hungary, within the framework of the 1st thematic program of the University of Pecs (2020-4.1.1-TKP2020) . The authors wish to thank Gobor Lente for helpful discussions. LA - English DB - MTMT ER - TY - CONF AU - Jenei, Laura Barbara AU - Ősz, Katalin TI - Redox and photochemical properties of 1,4-benzoquinone derivatives T2 - BOOK OF ABSTRACTS for the 2nd International Conference on Reaction Kinetics, Mechanisms and Catalysis PY - 2021 SP - 124 EP - 124 PG - 1 UR - https://m2.mtmt.hu/api/publication/32030026 ID - 32030026 LA - English DB - MTMT ER - TY - JOUR AU - Michnyóczki, Judit AU - Kiss, Virág AU - Ősz, Katalin TI - A kinetic study of the photooxidation of water by aqueous cerium(IV) in sulfuric acid using a diode array spectrophotometer JF - JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY J2 - J PHOTOCH PHOTOBIO A VL - 408 PY - 2021 PG - 8 SN - 1010-6030 DO - 10.1016/j.jphotochem.2020.113110 UR - https://m2.mtmt.hu/api/publication/31788160 ID - 31788160 N1 - Funding details: European Commission, EC Funding details: Emberi Eroforrások Minisztériuma, EMMI Funding details: Pécsi Tudományegyetem, PTE Funding details: European Regional Development Fund, FEDER, GINOP-2.3.2-15-2016-00008, GINOP-2.3.3-15-2016-00004 Funding text 1: This work was supported by the Higher Education Institutional Excellence Programme of the Ministry of Human Capacities in Hungary, within the framework of the 1 st thematic programme of the University of Pécs . The work of Virág Kiss was supported by the EU and co-financed by the European Regional Development Fund under the project GINOP-2.3.2-15-2016-00008 and GINOP-2.3.3-15-2016-00004. Funding Agency and Grant Number: Higher Education Institutional Excellence Programme of the Ministry of Human Capacities in Hungary; EUEuropean Commission; European Regional Development FundEuropean Commission [GINOP-2.3.2-15-2016-00008, GINOP-2.3.3-15-2016-00004] Funding text: This work was supported by the Higher Education Institutional Excellence Programme of the Ministry of Human Capacities in Hungary, within the framework of the 1st thematic programme of the University of Pecs. The work of Virag Kiss was supported by the EU and co-financed by the European Regional Development Fund under the project GINOP-2.3.2-15-2016-00008 and GINOP-2.3.3-15-2016-00004. AB - 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. LA - English DB - MTMT ER - TY - CONF AU - Ősz, Katalin AU - Kégl, Tamás AU - Jenei, Laura Barbara AU - Józsa, Éva TI - How substituents affect the activation parameters of the reaction between 1,4-benzoquinones and hydrogen peroxide T2 - BOOK OF ABSTRACTS for the 2nd International Conference on Reaction Kinetics, Mechanisms and Catalysis PY - 2021 SP - 140 EP - 140 PG - 1 UR - https://m2.mtmt.hu/api/publication/32030025 ID - 32030025 LA - English DB - MTMT ER - TY - JOUR AU - Lente, Gábor AU - Ősz, Katalin TI - Barometric formulas: various derivations and comparisons to environmentally relevant observations JF - CHEMTEXTS: THE TEXTBOOK JOURNAL OF CHEMISTRY J2 - CHEMTEXTS VL - 6 PY - 2020 IS - 2 PG - 14 SN - 2199-3793 DO - 10.1007/s40828-020-0111-6 UR - https://m2.mtmt.hu/api/publication/31238721 ID - 31238721 LA - English DB - MTMT ER - TY - JOUR AU - Józsa, Éva AU - Kiss, Virág AU - Ősz, Katalin TI - Photochemical processes of 1,4-benzoquinones in aqueous medium JF - JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY J2 - J PHOTOCH PHOTOBIO A VL - 360 PY - 2018 SP - 166 EP - 173 PG - 8 SN - 1010-6030 DO - 10.1016/j.jphotochem.2018.04.024 UR - https://m2.mtmt.hu/api/publication/3368529 ID - 3368529 N1 - Funding Agency and Grant Number: Hungarian Science Funding Agency OTKAOrszagos Tudomanyos Kutatasi Alapprogramok (OTKA) [NK105156]; EUEuropean Union (EU); European Regional Development FundEuropean Union (EU) [GINOP-2.3.2-15-2016-00008]; National Excellence Program - Elaborating and operating an inland student and researcher personal support system [TAMOP 4.2.4. A/2-11-1-2012-0001]; European UnionEuropean Union (EU); European Social FundEuropean Social Fund (ESF); State of Hungary; European Social FundEuropean Social Fund (ESF) [TAMOP 4.2.4. A/2-11-1-2012-0001] Funding text: Hungarian Science Funding Agency OTKA is acknowledged for support under contract no. NK105156.; The research was supported by the EU and co-financed by the European Regional Development Fund under the project GINOP-2.3.2-15-2016-00008.; This research was realized in the frames of TAMOP 4.2.4. A/2-11-1-2012-0001 "National Excellence Program - Elaborating and operating an inland student and researcher personal support system". The project was subsidized by the European Union and co-financed by the European Social Fund.; The research performed by Eva Jozsa for this manuscript was supported by the European Union and the State of Hungary, co-financed by the European Social Fund in the framework of TAMOP 4.2.4. A/2-11-1-2012-0001 'National Excellence Program'. Department of Physical Chemistry, University of Debrecen, Egyetem tér 1., Debrecen, H-4032, Hungary Department of General and Physical Chemistry, University of Pécs, Ifjúság útja 6., Pécs, H-7624, Hungary Cited By :3 Export Date: 5 February 2021 CODEN: JPPCE Correspondence Address: Ősz, K.; Department of General and Physical Chemistry, Ifjúság útja 6., Hungary; email: oszk@gamma.ttk.pte.hu Funding details: Hungarian Scientific Research Fund, OTKA Funding details: European Commission, EC Funding details: European Regional Development Fund, FEDER, GINOP-2.3.2-15-2016-00008 Funding details: European Social Fund, ESF Funding details: European Commission, EC Funding details: European Social Fund, ESF Funding details: European Commission, EC Funding text 1: Hungarian Science Funding Agency OTKA is acknowledged for support under contract no. NK105156 . Funding text 2: The research was supported by the EU and co-financed by the European Regional Development Fund under the project GINOP-2.3.2-15-2016-00008. Funding text 3: This research was realized in the frames of TÁMOP 4.2.4. A/2-11-1-2012-0001 “National Excellence Program – Elaborating and operating an inland student and researcher personal support system”. The project was subsidized by the European Union and co-financed by the European Social Fund . Funding text 4: The research performed by Éva Józsa for this manuscript was supported by the European Union and the State of Hungary , co-financed by the European Social Fund in the framework of TÁMOP 4.2.4. A/2-11-1-2012-0001 ‘National Excellence Program’. AB - 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. LA - English DB - MTMT ER - TY - CHAP AU - V., Kiss AU - L.J., Csépes-Ruzicska AU - B.M., Hülvely AU - P., Tarczali-Sarudi AU - Fábián, István AU - Ősz, Katalin ED - Željko, Čupić ED - Slobodan, Anić TI - REACTION BETWEEN SULFUR(IV) AND CHLORO-1,4-BENZOQUINONES T2 - Physical Chemistry 2018 (Proceedings) PB - Society of Physical Chemists of Serbia CY - Belgrád SN - 9788682475361 PY - 2018 SP - 217-220 UR - https://m2.mtmt.hu/api/publication/31250834 ID - 31250834 LA - English DB - MTMT ER - TY - CHAP AU - Kerekes, Péter AU - Kiss, Virág AU - Lente, Gábor AU - Ősz, Katalin ED - Lente, Gábor TI - QUANTITATIVE KINETIC DESCRIPTION OF THE REDOX (PHOTO)REACTION BETWEEN CERIUM(IV) AND WATER T2 - BOOK OF ABSTRACTS. Mathematics in (bio)Chemical Kinetics and Engineering (MaCKiE) 2017 PB - Akadémiai Kiadó CY - Budapest SN - 9789634540960 PY - 2017 SP - 62 EP - 63 PG - 2 UR - https://m2.mtmt.hu/api/publication/3226251 ID - 3226251 LA - English DB - MTMT ER - TY - JOUR AU - Kiss, Virág AU - Lehoczki, Gábor AU - Ősz, Katalin TI - Mathematical description of pH-stat kinetic traces measured during photochemical quinone decomposition JF - PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES J2 - PHOTOCH PHOTOBIO SCI VL - 16 PY - 2017 IS - 4 SP - 519 EP - 526 PG - 8 SN - 1474-905X DO - 10.1039/C6PP00333H UR - https://m2.mtmt.hu/api/publication/3177479 ID - 3177479 N1 - Department of Physical Chemistry, University of Debrecen, Debrecen, Egyetem tér 1., H-4032, Hungary Department of Inorganic and Analytical Chemistry, University of Debrecen, Debrecen, Egyetem tér 1., H-4032, Hungary Cited By :3 Export Date: 5 February 2021 CODEN: PPSHC Correspondence Address: Ősz, K.; Department of Physical Chemistry, Hungary; email: osz.katalin@science.unideb.hu Funding details: Hungarian Scientific Research Fund, OTKA, NK105156 Funding text 1: Hungarian Science Funding Agency OTKA is acknowledged for support under contract no. NK105156. The contribution of ?va J?zsa to building the pH-stat system is also gratefully acknowledged. The authors wish to thank G?bor Lente, Tam?s Ditr?i and Gy?ngyi Gy?m?nt for helpful discussions AB - 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. LA - English DB - MTMT ER -