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Pasinszki T, Prasad SS, Krebsz M. Quantitative determination of heavy metal contaminants in edible soft tissue of clams, mussels, and oysters. Environ Monit Assess 2023; 195:1066. [PMID: 37598134 DOI: 10.1007/s10661-023-11686-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 08/07/2023] [Indexed: 08/21/2023]
Abstract
Aquatic environments are important sources of healthy and nutritious foods; however, clams, mussels, and oysters (the bivalves most consumed by humans) can pose considerable health risks to consumers if contaminated by heavy metals in polluted areas. These organisms can accumulate dangerously high concentrations of heavy metals (e.g., Cd, Hg, Pb) in their soft tissues that can then be transferred to humans following ingestion. Monitoring contaminants in clams, mussels and oysters and their environments is critically important for global human health and food security, which requires reliable measurement of heavy-metal concentrations in the soft tissues. The aim of our present paper is to provide a review of how heavy metals are quantified in clams, mussels, and oysters. We do this by evaluating sample-preparation methods (i.e., tissue digestion / extraction and analyte preconcentration) and instrumental techniques (i.e., atomic, fluorescence and mass spectrometric methods, chromatography, neutron activation analysis and electrochemical sensors) that have been applied for this purpose to date. Application of these methods, their advantages, limitations, challenges and expected future directions are discussed.
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Affiliation(s)
- Tibor Pasinszki
- College of Engineering, Science and Technology, Fiji National University, P.O. Box 3722, Samabula, Suva, Fiji.
| | - Shilvee S Prasad
- College of Engineering, Science and Technology, Fiji National University, P.O. Box 3722, Samabula, Suva, Fiji
| | - Melinda Krebsz
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia
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Boulhaoua M, Pasinszki T, Torvisco A, Oláh-Szabó R, Bősze S, Csámpai A. Synthesis, structure and in vitro antiproliferative effects of alkyne-linked 1,2,4-thiadiazole hybrids including erlotinib- and ferrocene-containing derivatives. RSC Adv 2021; 11:28685-28697. [PMID: 35478544 PMCID: PMC9038148 DOI: 10.1039/d1ra05095h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 08/15/2021] [Indexed: 12/24/2022] Open
Abstract
Chemotherapy is an indispensable tool to treat cancer, therefore, the development of new drugs that can treat cancer with minimal side effects and lead to more favorable prognoses is of crucial importance. A series of eleven novel 1,2,4-thiadiazoles bearing erlotinib (a known anticancer agent), phenylethynyl, ferrocenyl, and/or ferrocenethynyl moieties were synthesized in this work and characterized by NMR, IR and mass spectroscopies. The solid-phase structures were determined by single-crystal X-ray diffraction. Partial isomerisation of bis(erlotinib)-1,2,4-thiadiazole into its 1,3,4-thiadiazole isomer, leading to the isolation of a 3 : 2 isomer mixture, was observed and a plausible mechanism for isomerisation is suggested. The in vitro cytostatic effect and the long-term cytotoxicity of these thiadiazole-hybrids, as well as that of erlotinib, 3,5-dichloro-1,2,4-thiadiazole and 3,5-diiodo-1,2,4-thiadiazole were investigated against A2058 human melanoma, HepG2 human hepatocellular carcinoma, U87 human glioma, A431 human epidermoid carcinoma, and PC-3 human prostatic adenocarcinoma cell lines. Interestingly, erlotinib did not exhibit a significant cytostatic effect against these cancer cell lines. 1,2,4-Thiadiazole hybrids bearing one erlotinib moiety or both an iodine and a ferrocenethynyl group, as well as 3,5-diiodo-1,2,4-thiadiazole demonstrated good to moderate cytostatic effects. Among the synthesized 1,2,4-thiadiazole hybrids, the isomer mixture of bis-erlotinib substituted 1,2,4- and 1,3,4-thiadiazoles showed the most potent activity. This isomer mixture was proven to be the most effective in long-term cytotoxicity, too. 3,5-Diiodo-1,2,4-thiadiazole and its hybrid with one erlotinib fragment were also highly active against A431 and PC-3 proliferation. These novel compounds may serve as new leads for further study of their antiproliferative properties.
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Affiliation(s)
- Mohammed Boulhaoua
- ELTE Eötvös Loránd University, Institute of Chemistry, Department of Inorganic Chemistry H-1117 Budapest Hungary
| | - Tibor Pasinszki
- Fiji National University, College of Engineering Science and Technology, Department of Chemistry P.O.Box 3722, Samabula Suva Fiji
| | - Ana Torvisco
- Graz University of Technology, Institute of Inorganic Chemistry Stremayrgasse 9/V 8010 Graz Austria
| | - Rita Oláh-Szabó
- MTA-ELTE Research Group of Peptide Chemistry Pázmány P. sétány 1/A H-1117 Budapest Hungary
| | - Szilvia Bősze
- MTA-ELTE Research Group of Peptide Chemistry Pázmány P. sétány 1/A H-1117 Budapest Hungary
| | - Antal Csámpai
- ELTE Eötvös Loránd University, Institute of Chemistry, Department of Organic Chemistry H-1117 Budapest Hungary
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Krebsz M, Pasinszki T, Tung TT, Nine MJ, Losic D. Multiple applications of bio-graphene foam for efficient chromate ion removal and oil-water separation. Chemosphere 2021; 263:127790. [PMID: 32854003 DOI: 10.1016/j.chemosphere.2020.127790] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/20/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
This paper presents the synthesis of bio-graphene foams (bGFs) from renewable sources, and the application of bGFs as new adsorbents in removal of chromate ions and oil contaminants from waste water. A two-step synthetic method was developed to produce bGFs with unique porous architecture and high specific surface area (up to 805 m2 g-1) that is highly desirable for environmental applications. The adsorption performance of prepared bGFs for removal of chromate ions from water was studied in relation to CrO42- concentration, adsorbent load, pH, and contact time to confirm adsorption capacity, kinetics and pH dependence. The adsorption isotherms of chromate ions were consistent with the Langmuir model, revealing an outstanding adsorption capacity of 245 mg of Cr(VI)/g bGFs (pH∼7). bGFs were capable of reducing Cr(VI) in water below the maximum permissible level (0.050 mg dm-3) for human consumption (WHO). In a second application, our results convincingly showed excellent performance of bGFs in separating organic solvents and oils from water in a continuous oil-water separation process showing 99.1% and 98.8% separation efficiency for toluene and petroleum, respectively. Our findings confirm that the outstanding performance of bGFs, and suggest their use as efficient adsorbents for environmental remediation.
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Affiliation(s)
- Melinda Krebsz
- School of Chemical Engineering, The University of Adelaide, Adelaide, 5005, North Terrace, South Australia, Australia
| | - Tibor Pasinszki
- Fiji National University, Department of Chemistry, School of Pure Sciences, College of Engineering, Science & Technology, P.O.Box 7222, Nasinu, Fiji.
| | - Tran Thanh Tung
- School of Chemical Engineering, The University of Adelaide, Adelaide, 5005, North Terrace, South Australia, Australia; ARC Research Hub for Graphene Enabled Industry Transformation, The University of Adelaide, Adelaide, 5005, North Terrace, South Australia, Australia.
| | - Md Julker Nine
- School of Chemical Engineering, The University of Adelaide, Adelaide, 5005, North Terrace, South Australia, Australia; ARC Research Hub for Graphene Enabled Industry Transformation, The University of Adelaide, Adelaide, 5005, North Terrace, South Australia, Australia
| | - Dusan Losic
- School of Chemical Engineering, The University of Adelaide, Adelaide, 5005, North Terrace, South Australia, Australia; ARC Research Hub for Graphene Enabled Industry Transformation, The University of Adelaide, Adelaide, 5005, North Terrace, South Australia, Australia.
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Pasinszki T, Krebsz M. Synthesis and Application of Zero-Valent Iron Nanoparticles in Water Treatment, Environmental Remediation, Catalysis, and Their Biological Effects. Nanomaterials (Basel) 2020; 10:E917. [PMID: 32397461 PMCID: PMC7279245 DOI: 10.3390/nano10050917] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 11/17/2022]
Abstract
Present and past anthropogenic pollution of the hydrosphere and lithosphere is a growing concern around the world for sustainable development and human health. Current industrial activity, abandoned contaminated plants and mining sites, and even everyday life is a pollution source for our environment. There is therefore a crucial need to clean industrial and municipal effluents and remediate contaminated soil and groundwater. Nanosized zero-valent iron (nZVI) is an emerging material in these fields due to its high reactivity and expected low impact on the environment due to iron's high abundance in the earth crust. Currently, there is an intensive research to test the effectiveness of nZVI in contaminant removal processes from water and soil and to modify properties of this material in order to fulfill specific application requirements. The number of laboratory tests, field applications, and investigations for the environmental impact are strongly increasing. The aim of the present review is to provide an overview of the current knowledge about the catalytic activity, reactivity and efficiency of nZVI in removing toxic organic and inorganic materials from water, wastewater, and soil and groundwater, as well as its toxic effect for microorganisms and plants.
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Affiliation(s)
- Tibor Pasinszki
- Department of Chemistry, School of Pure Sciences, College of Engineering, Science and Technology, Fiji National University, Suva P.O. Box 7222, Fiji;
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More YW, Tekale SU, Kaminwar NS, Kótai L, Pasinszki T, Kendrekar PS, Pawar RP. Synthesis of 3,4-Dihydropyrano[c]chromenes Using Carbon Microsphere Supported Copper Nanoparticles (Cu-NP/C) Prepared from Loaded Cation Exchange Resin as a Catalyst. Curr Org Synth 2020; 16:288-293. [PMID: 31975678 DOI: 10.2174/1570179415666181116104931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 10/22/2018] [Accepted: 10/27/2018] [Indexed: 11/22/2022]
Abstract
AIM AND OBJECTIVE The present study was performed with the aim to develop an efficient and environmentally benign protocol for the synthesis of biologically siginifcant 3, 4-dihydropyrano[c]chromenes using a new catalytic material. The protocol involves the use of a reusable, environment friendly materials and solvents with operational simplicity. MATERIALS AND METHODS Carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin were synthesized, characterized with well versed analytical techniques such as XRD, SEM and Raman spectroscopy and the synthesized material was used as a catalyst for the environmentally benign synthesis of 3,4-dihydropyrano[c]chromenes. RESULTS The formation of carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin was confirmed by XRD, SEM and Raman spectroscopy which was employed as a heterogeneous material for the synthesis of 3,4-dihydropyrano[c]chromenes. The products formed were characterized by the analysis of spectroscopic data - NMR, IR and mass. The safe catalytic system offers several advantages including operational simplicity, environmental friendliness, high yield, and reusability of catalyst and green chemical transformation. CONCLUSION Herein we report an easy and efficient protocol for the one-pot synthesis of dihydropyrano[ c]chromenes using environmentally benign MCR approach in ethanol as the green solvent. The method developed herein constitutes a valuable addition to the existing methods for the synthesis of titled compounds.
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Affiliation(s)
- Yogesh W More
- Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra), India
| | - Sunil U Tekale
- Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra), India
| | | | - László Kótai
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, H-1519, Hungary
| | - Tibor Pasinszki
- Department of Chemistry, School of Pure Sciences, College of Engineering, Science & Technology, Fiji National University, Nasinu 7222, Fiji
| | - Pravin S Kendrekar
- Department of Health Sciences, Central University of Technology, Bloemfontein, Free State-9300, South Africa
| | - Rajendra P Pawar
- Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra), India
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Kaminwar NS, Patwari SB, Goskulwad SP, More SD, Vyawahare SK, Pasinszki T, Kotai L, Pawar RP. A ONE POT THREE-COMPONENT SYNTHESIS OF SPIROOXOINDOLES USING Cu-NANOPARTICLES GRAFTED ON CARBON MICROSPHERES AS CATALYST. ECB 2019. [DOI: 10.17628/ecb.2019.8.153-159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Pasinszki T, Vörös T, Vass G, Tarczay G, Jalsovszky I. Spectroscopy, structure, thermal and photochemical decomposition of 5-chloro-3-trifluoromethyl-1,2,4-thiadiazole: Generation of trifluoroacetonitrile N-sulfide. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sajó IE, Kovács GB, Pasinszki T, Bombicz PA, May Z, Szilágyi IM, Jánosity A, Banerji KK, Kant R, Kótai L. The chemical identity of “[Ag(py)2]MnO4” organic solvent soluble oxidizing agent and new synthetic routes for the preparation of [Ag(py)n]XO4 (X = Mn, Cl, and Re, n = 2–4) complexes. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1493464] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- István E. Sajó
- János Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Gréta B. Kovács
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Tibor Pasinszki
- Department of Chemistry, Faculty of Sciences, College of Engineering, Science & Technology, Fiji National University, Nasinu, Suva, Fiji Islands
| | - Petra A. Bombicz
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Zoltán May
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Imre M. Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Anna Jánosity
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | | | - Rajni Kant
- Department of Physics, X-ray Crystallography Laboratory, University of Jammu, Jammu-Tawi, India
| | - László Kótai
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- Deuton-X Ltd., Érd, Hungary
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Pasinszki T, Krebsz M, Lajgut GG, Kocsis T, Kótai L, Kauthale S, Tekale S, Pawar R. Copper nanoparticles grafted on carbon microspheres as novel heterogeneous catalysts and their application for the reduction of nitrophenol and one-pot multicomponent synthesis of hexahydroquinolines. NEW J CHEM 2018. [DOI: 10.1039/c7nj03562d] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon microsphere-supported Cu nanoparticles were fabricated, characterized, and applied for synthesis.
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Affiliation(s)
- Tibor Pasinszki
- ELTE Eötvös Loránd University
- Institute of Chemistry
- Budapest
- Hungary
| | - Melinda Krebsz
- ELTE Eötvös Loránd University
- Institute of Chemistry
- Budapest
- Hungary
| | | | - Tünde Kocsis
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - László Kótai
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | | | - Sunil Tekale
- Department of Chemistry
- Deogiri College
- Aurangabad (MS)
- India
| | - Rajendra Pawar
- Department of Chemistry
- Deogiri College
- Aurangabad (MS)
- India
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Pasinszki T, Krebsz M, Tung TT, Losic D. Carbon Nanomaterial Based Biosensors for Non-Invasive Detection of Cancer and Disease Biomarkers for Clinical Diagnosis. Sensors (Basel) 2017; 17:E1919. [PMID: 28825646 PMCID: PMC5579959 DOI: 10.3390/s17081919] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 08/15/2017] [Accepted: 08/17/2017] [Indexed: 02/07/2023]
Abstract
The early diagnosis of diseases, e.g., Parkinson's and Alzheimer's disease, diabetes, and various types of cancer, and monitoring the response of patients to the therapy plays a critical role in clinical treatment; therefore, there is an intensive research for the determination of many clinical analytes. In order to achieve point-of-care sensing in clinical practice, sensitive, selective, cost-effective, simple, reliable, and rapid analytical methods are required. Biosensors have become essential tools in biomarker sensing, in which electrode material and architecture play critical roles in achieving sensitive and stable detection. Carbon nanomaterials in the form of particle/dots, tube/wires, and sheets have recently become indispensable elements of biosensor platforms due to their excellent mechanical, electronic, and optical properties. This review summarizes developments in this lucrative field by presenting major biosensor types and variability of sensor platforms in biomedical applications.
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Affiliation(s)
- Tibor Pasinszki
- Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary.
| | - Melinda Krebsz
- School of Chemical Engineering, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia.
| | - Thanh Tran Tung
- School of Chemical Engineering, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia.
- ARC Research Hub for Graphene Enabled Industry Transformation, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia.
| | - Dusan Losic
- School of Chemical Engineering, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia.
- ARC Research Hub for Graphene Enabled Industry Transformation, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia.
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Thomas M, Brehm M, Hollóczki O, Kelemen Z, Nyulászi L, Pasinszki T, Kirchner B. Simulating the vibrational spectra of ionic liquid systems: 1-ethyl-3-methylimidazolium acetate and its mixtures. J Chem Phys 2015; 141:024510. [PMID: 25028030 DOI: 10.1063/1.4887082] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The vibrational spectra of the ionic liquid 1-ethyl-3-methylimidazolium acetate and its mixtures with water and carbon dioxide are calculated using ab initio molecular dynamics simulations, and the results are compared to experimental data. The new implementation of a normal coordinate analysis in the trajectory analyzer TRAVIS is used to assign the experimentally observed bands to specific molecular vibrations. The applied computational approaches prove to be particularly suitable for the modeling of bulk phase effects on vibrational spectra, which are highly important for the discussion of the microscopic structure in systems with a strong dynamic network of intermolecular interactions, such as ionic liquids.
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Affiliation(s)
- Martin Thomas
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Martin Brehm
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Linnéstraße 2, 04103 Leipzig, Germany
| | - Oldamur Hollóczki
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Zsolt Kelemen
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, 1111 Budapest, Hungary
| | - László Nyulászi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, 1111 Budapest, Hungary
| | - Tibor Pasinszki
- Department of Inorganic Chemistry, Institute of Chemistry, Eötvös Loránd University, Pázmány P. sétány 1/A, 1117 Budapest, Hungary
| | - Barbara Kirchner
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
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Abstract
The equilibrium structure, unimolecular reactions, and bimolecular reactions of nitrile selenides (XCNSe, where X = H, F, Cl, Br, CN, CH3) have been investigated using CCSD(T), CCSD(T)//B3LYP, and MR-AQCC//UB3LYP quantum-chemical methods. Nitrile selenides are demonstrated to be stable under isolated conditions at ambient temperature, i.e. in the dilute gas phase or in an inert solid matrix, but unstable in the condensed phase or solutions owing to bimolecular reactions. FCNSe and CH3CNSe cycloaddition with ethynes, ethenes, and nitriles was studied using the MR-AQCC//UB3LYP method. Cycloaddition was predicted to be facile at room temperature with small dipolarophiles.
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Pasinszki T, Krebsz M, Tarczay G, Wentrup C. Photolysis of Dimethylcarbamoyl Azide in an Argon Matrix: Spectroscopic Identification of Dimethylamino Isocyanate and 1,1-Dimethyldiazene. J Org Chem 2013; 78:11985-91. [DOI: 10.1021/jo402023m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tibor Pasinszki
- Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest 112, Hungary
| | - Melinda Krebsz
- Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest 112, Hungary
- Institute for Geological and Geochemical Research,
Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, 45 Budaörsi street, H-1112 Budapest, Hungary
| | - György Tarczay
- Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest 112, Hungary
| | - Curt Wentrup
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
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Krebsz M, Tarczay G, Pasinszki T. Generation and Spectroscopic Identification of ClCNS, ClNCS and NCCNS. Chemistry 2013; 19:17201-8. [DOI: 10.1002/chem.201302964] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Revised: 08/08/2013] [Indexed: 11/10/2022]
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Vörös T, Bazsó G, Tarczay G, Pasinszki T. Matrix-isolation spectroscopic and computational study of [2C, 2N, 2S] isomers: Photochemical generation of SCNNCS and NCSNCS from NCSSCN. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.04.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Pasinszki T, Vass G, Klapstein D, Westwood NPC. Generation, Spectroscopy, and Structure of Cyanoformyl Chloride and Cyanoformyl Bromide, XC(O)CN. J Phys Chem A 2012; 116:3396-403. [DOI: 10.1021/jp301528q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tibor Pasinszki
- Department of Inorganic Chemistry,
Institute of Chemistry, Eötvös Loránd University Budapest, H-1117 Budapest, Pázmány
P. sétány 1/A, Hungary
| | - Gábor Vass
- Department of Inorganic Chemistry,
Institute of Chemistry, Eötvös Loránd University Budapest, H-1117 Budapest, Pázmány
P. sétány 1/A, Hungary
| | - Dieter Klapstein
- Department of Chemistry, St. Francis Xavier University, P.O. Box 5000, Antigonish,
NS, Canada B2G 2W5
| | - Nicholas P. C. Westwood
- Guelph-Waterloo Centre for Graduate
Work in Chemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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Krebsz M, Májusi G, Pacsai B, Tarczay G, Pasinszki T. Generation and Spectroscopic Identification of Selenofulminic Acid and Its Methyl and Cyano Derivatives (XCNSe, X=H, CH3, NC). Chemistry 2012; 18:2646-52. [DOI: 10.1002/chem.201103004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2011] [Indexed: 11/09/2022]
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Pasinszki T. Editorial [Hot Topic: Covalent Pseudohalides (Guest Editor: Tibor Pasinszki)]. CURR ORG CHEM 2011. [DOI: 10.2174/138527211795656679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
The unstable acetonitrile N-sulfide molecule CH3CNS has been photolytically generated in inert solid argon matrix from 3,4-dimethyl-1,2,5-thiadiazole by 254-nm UV irradiation, and studied by ultraviolet spectroscopy and mid-infrared spectroscopy. The molecule is stable in the matrix to 254-nm UV irradiation, but decomposes to CH3CN and a sulfur atom when broad-band UV irradiation is used. Chemiluminescence due to S2 formation from triplet sulfur atoms was detected on warming the matrix to ∼20–25 K. The ground-state structure and potential uni- and bimolecular reactions of CH3CNS are investigated using B3LYP, CCSD(T), and MR-AQCC quantum-chemical methods. CH3CNS is demonstrated to be stable under isolated conditions at room temperature, i.e. in the dilute gas phase or in an inert solid matrix, but unstable owing to bimolecular reactions, i.e. in the condensed phase.
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Abstract
The parent furoxan (1,2,5-oxadiazole 2-oxide), synthesized from glyoxime and NO(2)(g), has been investigated in the gas phase for the first time by mid-infrared and He I photoelectron spectroscopy, and in the liquid phase by Raman spectroscopy. The ground-state geometry has been obtained from quantum-chemical calculations at the B3LYP, MPn (n = 2-4), CISD, QCISD, CCSD, CCSD(T), RSPTn (n = 2,3), MRCI, and MR-AQCC levels using 6-311++G(2d,2p), cc-pVTZ, aug-cc-pVTZ, cc-pCVTZ, and cc-pVQZ basis sets. Furoxan is predicted to be planar, with a strong exocyclic and a relatively weak endocyclic N-O bond. The furoxan moiety is electron rich, indicated e.g. by a large negative NPA charge (-0.46 e). According to various aromaticity indices, furoxan is nearly as aromatic as furan and furazan. Unlike alkyl- and cyano-substituted furoxans, the parent furoxan, upon thermolysis, does not cleave to the monomer nitrile oxide, yielding only HNCO, HCN, CO(2), CO, NO, and H(2)O decomposition products.
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Affiliation(s)
- Tibor Pasinszki
- Department of Inorganic Chemistry, Institute of Chemistry, Eotvos Lorand University Budapest, H-1117 Budapest, Pazmany P. setany 1/A, Hungary.
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Pasinszki T, Bazsó G, Krebsz M, Tarczay G. A matrix isolation and computational study of the [C, N, F, S] isomers. Phys Chem Chem Phys 2009; 11:9458-67. [DOI: 10.1039/b913204j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pasinszki T, Hajgató B, Havasi B, Westwood NPC. Dimerisation of nitrile oxides: a quantum-chemical study. Phys Chem Chem Phys 2009; 11:5263-72. [DOI: 10.1039/b823406j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pasinszki T. Quantum-chemical study of the structure and stability of pseudohalogens: OCN–NCO and its isomers. Phys Chem Chem Phys 2008; 10:1411-8. [DOI: 10.1039/b713832f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Havasi B, Pasinszki T, Westwood NPC. Gas-Phase Infrared and ab Initio Study of the Unstable CF3CNO Molecule and Its Stable Furoxan Ring Dimer. J Phys Chem A 2005; 109:3864-74. [PMID: 16833703 DOI: 10.1021/jp040725f] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The unstable trifluoroacetonitrile N-oxide molecule, CF3CNO, has been generated in high yield in the gas phase from CF3BrC=NOH and studied for the first time by gas-phase mid-infrared spectroscopy. Cold trapping of this molecule followed by slow warming forms the stable ring dimer, bis(trifluoromethyl)furoxan, also investigated by gas-phase infrared spectroscopy. The spectroscopy provides an investigation into the vibrational character of the two molecules, the assignments supported by calculations of the harmonic vibrational frequencies using in the case of CF3CNO both ab initio (CCSD(T)) and density functional theory (B3LYP) and B3LYP for the ring dimer. The ground-state structures of both molecules were investigated at the B3LYP level of theory, with CF3CNO further investigated using coupled-cluster. The CCSD(T) method suggests a slightly bent (C(s)) structure for CF3CNO, while the B3LYP method (with basis sets ranging from 6-311G(d) to cc-pVTZ) suggests a close-to-linear or linear CCNO chain. The CCN bending potential in CF3CNO was explored at the CCSD(T)(fc)/cc-pVTZ level, with the results suggesting that CF3CNO exhibits strong quasi-symmetric top behavior with a barrier to linearity of 174 cm(-1). Since both isomerization and dimerization are feasible loss processes for this unstable molecule, the relative stability of CF3CNO with respect to the known cyanate (CF3OCN), isocyanate (CF3NCO), and fulminate (CF3ONC) isomers and the mechanism of the dimerization process to the ring furoxan and other isomers were studied with density functional theory.
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Affiliation(s)
- Balázs Havasi
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary
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Pasinszki T, Havasi B. Synthesis, spectroscopy and structure of CF3CH2OCN, CF3CH2NCO, and (CF3CH2O)2CNHElectronic supplementary information (ESI) available: Experimental and calculated infrared and Raman vibrational frequencies and intensities of CF3CH2OCN, (CF3CH2O)2CNH and CF3CH2NCO. See http://www.rsc.org/suppdata/cp/b2/b212777f/. Phys Chem Chem Phys 2003. [DOI: 10.1039/b212777f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pasinszki T, Havasi B, Kovács A. Midinfrared and Quantum-Chemical Study of the Structure, Conformation, and Isomerization of the Unstable CH3CH2OCN Molecule. J Phys Chem A 2003. [DOI: 10.1021/jp0211990] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tibor Pasinszki
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary, and Research Group for Technical Analytical Chemistry of the Hungarian Academy of Sciences at the Institute of General and Analytical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary
| | - Balázs Havasi
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary, and Research Group for Technical Analytical Chemistry of the Hungarian Academy of Sciences at the Institute of General and Analytical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary
| | - Attila Kovács
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary, and Research Group for Technical Analytical Chemistry of the Hungarian Academy of Sciences at the Institute of General and Analytical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary
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Pasinszki T, Havasi B. Quantum-chemical study of the structure and stability of ethynyl pseudohalides: HCC–NCO and its isomers. Phys Chem Chem Phys 2003. [DOI: 10.1039/b208277m] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pasinszki T, Westwood NPC. He I Photoelectron, Photoionization Mass Spectroscopy, Mid-Infrared, and ab Initio Study of the Unstable CH3OCN Molecule. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100006a005] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pasinszki T, Westwood NPC. Cyanogen Di-N-oxide (ONCCNO): Gas Phase Generation and a HeI Photoelectron, Photoionization Mass Spectroscopy, Midinfrared, and Ab Initio Study. J Am Chem Soc 2002. [DOI: 10.1021/ja00137a017] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pasinszki T, Aoki M, Masuda S, Harada Y, Ueno N, Hoshi H, Maruyama Y. Characterization of Ultrathin Films of Chloroaluminum Phthalocyanine during Layer-by-Layer Preparation on Graphite: PIES and UPS Study. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100034a026] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pasinszki T, Westwood NPC. Gas-Phase Generation of the Unstable BrCNO Molecule and Its Stable Dibromofuroxan Dimer. He I Photoelectron, Photoionization Mass Spectroscopy, Mid-Infrared, and ab Initio Studies. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100017a019] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pasinszki T, Yamakado H, Ohno K. Penning ionization of thiocyanatomethane, isocyanatomethane, and isothiocyanatomethane by collision with helium*(23S) metastable atoms. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100151a015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pasinszki T, Kárpáti T, Westwood NPC. Structure and Stability of Small Nitrile Sulfides and Their Attempted Generation from 1,2,5-Thiadiazoles. J Phys Chem A 2001. [DOI: 10.1021/jp010830e] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tibor Pasinszki
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary, and Guelph−Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Tamás Kárpáti
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary, and Guelph−Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Nicholas P. C. Westwood
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary, and Guelph−Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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Affiliation(s)
- Tibor Pasinszki
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary, and Guelph-Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Nicholas P. C. Westwood
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, Gellért tér 4, Hungary, and Guelph-Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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Pasinszki T, Kishimoto N, Ohno K. Penning Ionization Electron Spectroscopic and Ab Initio Study of the Interaction and Ionization of HNCO and HNCS with He*(23S) Metastable and Li(22S) Ground State Atoms. J Phys Chem A 1999. [DOI: 10.1021/jp992174c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tibor Pasinszki
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Naoki Kishimoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Koichi Ohno
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
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Pasinszki T, Kishimoto N, Ogawa T, Ohno K. Penning Ionization of NCCN by Experiment and Theory: A Two-Dimensional Penning Ionization Electron Spectroscopic and Quantum Chemical Study. J Phys Chem A 1999. [DOI: 10.1021/jp991049y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tibor Pasinszki
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Naoki Kishimoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Tetsuji Ogawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Koichi Ohno
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
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Pasinszki T, Kishimoto N, Ohno K. Two-Dimensional Penning Ionization Electron Spectroscopy of NNO, HCNO, and HNNN: Electronic Structure and the Interaction Potential with He*(23S) Metastable and Li(22S) Ground State Atoms. J Phys Chem A 1999. [DOI: 10.1021/jp991394n] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tibor Pasinszki
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Naoki Kishimoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Koichi Ohno
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
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Affiliation(s)
- Tibor Pasinszki
- Department of Inorganic Chemistry, Technical University of Budapest, H-1521 Budapest, Gellért tér 4, Hungary
| | - Nicholas P. C. Westwood
- Guelph-Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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Pasinszki T, Westwood NPC. Ground, Excited, and Ionic States of the NCCNO Molecule: A HeI Photoelectron, Infrared, Ultraviolet, and ab Initio Investigation. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp9617938] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tibor Pasinszki
- Guelph-Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
| | - Nicholas P. C. Westwood
- Guelph-Waterloo Centre for Graduate Work in Chemistry, Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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