@CONFERENCE{MTMT:34833665, title = {A desztillációs eljárás környezeti értékelése az illékony- és szerves halogénvegyületek eltávolítására a technológiai hulladékvizek esetében}, url = {https://m2.mtmt.hu/api/publication/34833665}, author = {Do Thi, Huyen Trang and Tóth, András József}, booktitle = {Műszaki Kémiai Napok 2024}, unique-id = {34833665}, year = {2024}, pages = {2}, orcid-numbers = {Tóth, András József/0000-0002-5787-8557} } @CONFERENCE{MTMT:34833652, title = {Komplex, erősen nem-ideális négykomponensű elegyek elválasztása desztillációval – modellezés és optimalizálás folyamatszimulátorban}, url = {https://m2.mtmt.hu/api/publication/34833652}, author = {Somogyvári, Erik and Tóth, András József}, booktitle = {Műszaki Kémiai Napok 2024}, unique-id = {34833652}, year = {2024}, pages = {1}, orcid-numbers = {Tóth, András József/0000-0002-5787-8557} } @{MTMT:34827493, title = {Catalysis in Biomass-Based Solvents}, url = {https://m2.mtmt.hu/api/publication/34827493}, author = {Mika, László Tamás and Árvai, Csaba}, booktitle = {Reference Module in Chemistry, Molecular Sciences and Chemical Engineering}, doi = {10.1016/B978-0-443-15742-4.00041-7}, unique-id = {34827493}, abstract = {Replacing fossil resources with renewables is one of the most pressing challenges in developing a cleaner chemical industry. It is a fact that the chemical industry utilizes enormous amounts of solvents, which undoubtedly contribute to the release of millions of tons of organic compounds into the environment. The research activities on biomass conversion have identified promising alternatives that could be introduced as non-fossil reaction media into various catalytic processes, lowering their environmental impacts. Herein, the application of g-valerolactone, 2-methyltetrahydrofuran, ethanol, glycerol, methyl- and ethyl levulinate, ethyl lactate, limonene and p- cymene as well as selected designer solvents i.e. choline chloride/urea deep eutectic solvent as biomass-based alternative reaction media for catalytic transformation were overviewed.}, year = {2024}, pages = {10.1016/B978-0-443-15742-4.00041-7} } @article{MTMT:34824724, title = {Multiparameter Sensing of Oxygen and pH at Biological Interfaces via Hyperspectral Imaging of Luminescent Sensor Nanoparticles}, url = {https://m2.mtmt.hu/api/publication/34824724}, author = {Bognár, Zsófia and Mosshammer, Maria and Brodersen, Kasper E. and Bollati, Elena and Gyurcsányi, Ervin Róbert and Kuhl, Michael}, doi = {10.1021/acssensors.3c01941}, journal-iso = {ACS SENSORS}, journal = {ACS SENSORS}, volume = {9}, unique-id = {34824724}, issn = {2379-3694}, abstract = {Chemical dynamics in biological samples are seldom stand-alone processes but represent the outcome of complicated cascades of interlinked reaction chains. In order to understand these processes and how they correlate, it is important to monitor several parameters simultaneously at high spatial and temporal resolution. Hyperspectral imaging is a promising tool for this, as it provides broad-range spectral information in each pixel, enabling the use of multiple luminescent indicator dyes, while simultaneously providing information on sample structures and optical properties. In this study, we first characterized pH- and O-2-sensitive indicator dyes incorporated in different polymer matrices as optical sensor nanoparticles to provide a library for (hyperspectral) chemical imaging. We then demonstrate the successful combination of a pH-sensitive indicator dye (HPTS(DHA)(3)), an O-2-sensitive indicator dye (PtTPTBPF), and two reference dyes (perylene and TFPP), incorporated in polymer nanoparticles for multiparameter chemical imaging of complex natural samples such as green algal biofilms (Chlorella sorokiniana) and seagrass leaves (Zostera marina) with high background fluorescence. We discuss the system-specific challenges and limitations of our approach and further optimization possibilities. Our study illustrates how multiparameter chemical imaging with hyperspectral read-out can now be applied on natural samples, enabling the alignment of several chemical parameters to sample structures.}, keywords = {PH; TEMPERATURE; FLUORESCENCE; OXYGEN; NANOPARTICLES; ALGAE; Chemistry, Analytical; optical sensor; Chemistry, Multidisciplinary; Chemical imaging; Nanobeads; multiparametersensing; O-2 DYNAMICS}, year = {2024}, eissn = {2379-3694}, pages = {1763-1774}, orcid-numbers = {Gyurcsányi, Ervin Róbert/0000-0002-9929-7865} } @article{MTMT:34822025, title = {Comparative study of flame retardancy in polyimine vitrimers and composites: Evaluating additive and reactive flame retardants acting via gas-, solid-, and combined-phase mechanisms}, url = {https://m2.mtmt.hu/api/publication/34822025}, author = {Toldy, Andrea and Poór, Dániel István and Szolnoki, Beáta and Devecser, Boglárka and Geier, Norbert and Pomázi, Ákos}, doi = {10.1016/j.jmst.2024.01.047}, journal-iso = {J MATER SCI TECHNOL}, journal = {JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY}, volume = {196}, unique-id = {34822025}, issn = {1005-0302}, abstract = {We developed flame retarded polyimine type vitrimers and carbon fibre reinforced composites using two additive and a reactive flame retardant containing phosphorus: ammonium polyphosphate (APP), resorcinol bis(diphenyl phosphate) (RDP); and N,N',N’’-tris(2-aminoethyl)-phosphoric acid triamide (TEDAP). We characterised the vitrimer matrix materials by differential scanning calorimetry (DSC), thermal analysis (TGA), limiting oxygen index (LOI), UL-94 test and mass loss calorimetry (MLC), while the vitrimer composites by LOI, UL-94 test, MLC and dynamic mechanical analysis (DMA). We compared the performance of the vitrimer systems to a benchmark pentaerythritol-based aliphatic epoxy resin system (PER). The vitrimer reference had higher thermal stability but lower fire performance than the PER aliphatic reference epoxy. At lower phosphorus content, the vitrimer systems exhibited a melting above their vitrimer transition temperature, which negatively affected their LOI and UL-94 results. From 2% phosphorus content, rapid charring and extinguishing of vitrimers prevented the softening and deforming. The superior performance of these same flame retardants in vitrimer systems could be attributed to the high nitrogen content of imine-based vitrimers in combination with phosphorus flame retardants, exploiting nitrogen-phosphorus synergism. In both matrices, flame retardants with solid phase action lead to better fire performance, while in composites, the lowest peak heat release rates (152 kW/m2 in vitrimer composite) were achieved with RDP acting predominantly in the gas phase, as carbon fibres hindered the intumescent phenomenon. © 2024}, keywords = {PERFORMANCE; Nitrogen; differential scanning calorimetry; ADDITIVES; flame retardancy; carbon fibers; Thermoanalysis; calorimeters; Epoxy Resins; EPOXY; EPOXY; Benchmarking; Mass loss; fiber reinforced plastics; Flame retardants; Polymer composite; Polymer composite; Carbon fibre; fire performance; Limiting Oxygen Index; Flame-retardancy; Reactive flame retardants; vitrimer; vitrimer; Polyimines; polyimine}, year = {2024}, eissn = {1941-1162}, pages = {101-111}, orcid-numbers = {Toldy, Andrea/0000-0003-3569-1828; Poór, Dániel István/0000-0002-8036-7966; Szolnoki, Beáta/0000-0001-7214-9734; Geier, Norbert/0000-0001-7937-7246; Pomázi, Ákos/0000-0003-2969-8679} } @article{MTMT:34821706, title = {Revisiting Hafner’s Azapentalenes: The Chemistry of 1,3-Bis(dimethylamino)-2-azapentalene}, url = {https://m2.mtmt.hu/api/publication/34821706}, author = {Meiszter, Enikő and Gazdag, Tamás and Mayer, Péter J. and Kunfi, Attila and Holczbauer, Tamás and Sulyok-Eiler, Máté and London, Gábor}, doi = {10.1021/acs.joc.3c02564}, journal-iso = {J ORG CHEM}, journal = {JOURNAL OF ORGANIC CHEMISTRY}, unique-id = {34821706}, issn = {0022-3263}, abstract = {Stable azaheterocyclic derivatives of pentalene have been reported by the group of Hafner in the 1970s. However, these structures remained of low interest until recently, when they started to be investigated in the context of organic light-emitting diodes’ (OLEDs’) development. Herein, we revisit the synthesis of stable azapentalene derivative 1,3-bis(dimethylamino)-2-azapentalene and further explore its properties both computationally and experimentally. Beyond the reproduction and optimization of some previously reported transformations, such as formylation and amine substitution, the available scope of reactions was expanded with azo-coupling, selective halogenations, and cross-coupling reactions. © 2024 The Authors. Published by American Chemical Society.}, year = {2024}, eissn = {1520-6904}, orcid-numbers = {Mayer, Péter J./0000-0003-4891-3119; Sulyok-Eiler, Máté/0000-0002-3968-8776} } @article{MTMT:34819821, title = {In situ captured antibacterial action of membrane-incising peptide lamellae}, url = {https://m2.mtmt.hu/api/publication/34819821}, author = {el Battioui, Kamal and Chakraborty, Sohini and Wacha, András and Molnár, Dániel and Quemé-Peña, Mayra and Szigyártó, Imola Cs. and Szabó, Csenge Lilla and Bodor, Andrea and Horváti, Kata and Gyulai, Gergő and Bősze, Szilvia and Mihály, Judith and Jezsó, Bálint and Románszki, Loránd and Tóth, Judit and Varga, Zoltán and Mándity, István and Juhász, Tünde and Beke-Somfai, Tamás}, doi = {10.1038/s41467-024-47708-4}, journal-iso = {NAT COMMUN}, journal = {NATURE COMMUNICATIONS}, volume = {15}, unique-id = {34819821}, issn = {2041-1723}, abstract = {Developing unique mechanisms of action are essential to combat the growing issue of antimicrobial resistance. Supramolecular assemblies combining the improved biostability of non-natural compounds with the complex membrane-attacking mechanisms of natural peptides are promising alternatives to conventional antibiotics. However, for such compounds the direct visual insight on antibacterial action is still lacking. Here we employ a design strategy focusing on an inducible assembly mechanism and utilized electron microscopy (EM) to follow the formation of supramolecular structures of lysine-rich heterochiral β 3 -peptides, termed lamellin-2K and lamellin-3K, triggered by bacterial cell surface lipopolysaccharides. Combined molecular dynamics simulations, EM and bacterial assays confirmed that the phosphate-induced conformational change on these lamellins led to the formation of striped lamellae capable of incising the cell envelope of Gram-negative bacteria thereby exerting antibacterial activity. Our findings also provide a mechanistic link for membrane-targeting agents depicting the antibiotic mechanism derived from the in-situ formation of active supramolecules.}, year = {2024}, eissn = {2041-1723}, orcid-numbers = {Wacha, András/0000-0002-9609-0893; Szabó, Csenge Lilla/0000-0002-6508-3439; Bodor, Andrea/0000-0002-7422-298X; Gyulai, Gergő/0000-0002-1352-2014; Jezsó, Bálint/0000-0002-1306-4797; Románszki, Loránd/0000-0002-6347-5228; Tóth, Judit/0000-0002-0965-046X; Varga, Zoltán/0000-0002-5741-2669; Mándity, István/0000-0003-2865-6143; Beke-Somfai, Tamás/0000-0002-4788-3758} } @article{MTMT:34818910, title = {Environmental evaluation and comparison of hybrid separation methods based on distillation and pervaporation for dehydration of binary alcohol mixtures with Life Cycle, PESTLE, and Multi-Criteria Decision Analyses}, url = {https://m2.mtmt.hu/api/publication/34818910}, author = {Do Thi, Huyen Trang and Tóth, András József}, doi = {10.1016/j.seppur.2024.127684}, journal-iso = {SEP PURIF TECHNOL}, journal = {SEPARATION AND PURIFICATION TECHNOLOGY}, volume = {348}, unique-id = {34818910}, issn = {1383-5866}, year = {2024}, eissn = {1873-3794}, orcid-numbers = {Tóth, András József/0000-0002-5787-8557} } @article{MTMT:34818727, title = {Projected Atomic Orbitals As Optimal Virtual Space for Excited State Projection-Based Embedding Calculations}, url = {https://m2.mtmt.hu/api/publication/34818727}, author = {Szirmai, Ádám B. and Hégely, Bence and Tajti, Attila and Kállay, Mihály and Szalay, Péter}, doi = {10.1021/acs.jctc.4c00104}, journal-iso = {J CHEM THEORY COMPUT}, journal = {JOURNAL OF CHEMICAL THEORY AND COMPUTATION}, unique-id = {34818727}, issn = {1549-9618}, year = {2024}, eissn = {1549-9626}, orcid-numbers = {Szirmai, Ádám B./0000-0003-2272-5574; Hégely, Bence/0000-0002-8672-2201; Tajti, Attila/0000-0002-7974-6141; Szalay, Péter/0000-0003-1885-3557} } @article{MTMT:34812401, title = {Role of Lewis acid/base anchor atoms in catalyst regeneration: a comprehensive study on biomimetic EP3Fe nitrogenases}, url = {https://m2.mtmt.hu/api/publication/34812401}, author = {Kfoury, Joseph and Oláh, Julianna}, doi = {10.1039/d4cp00483c}, journal-iso = {PHYS CHEM CHEM PHYS}, journal = {PHYSICAL CHEMISTRY CHEMICAL PHYSICS}, volume = {26}, unique-id = {34812401}, issn = {1463-9076}, abstract = {In the quest for sustainable ammonia synthesis routes, biomimetic complexes have been intensively studied. Here we focus on the Peter's group Fe-nitrogenase catalyst with EPPP scorpionate ligands, and explore the effect of anchor atom selection (B, Al, Ga, N and P) and the impact of chloro substitution on the phenyl rings on nitrogen fixation. The reaction profiles of complexes with Lewis basic anchor atoms exhibited energy-demanding reduction steps, with more exergonic protonation steps compared to the smoother reaction profiles observed for catalysts with Lewis acid anchor atoms, also implying that catalyst regeneration is especially challenging for catalysts with Lewis basic anchor atoms. The binding affinities of N-2 and H-2 to the complexes suggest that the autocatalytic hydrogen evolution reaction (HER), which ultimately leads to consumption of reactants and catalyst deactivation, is likely to become more prevalent for heavier anchor atoms and be more significant for Lewis basic anchor atom complexes. Out of the studied complexes, boron showed the smoothest reaction profile and the smallest affinity for H-2, which supports its superiour role as an anchor atom in accordance with experimental data.}, keywords = {CONVERSION; AMMONIA; APPROXIMATION; DENSITY-FUNCTIONAL THEORY; Chemistry, Physical; NH3; TRANSITION-METAL-COMPLEXES; N-2 REDUCTION; FE-N-2 COMPLEX; C-ATOM}, year = {2024}, eissn = {1463-9084}, pages = {12520-12529} }