1
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Zhu B, Jiang J, Lu B, Li X, Zeng X. Fluoromethylsulfinyl radicals: spectroscopic characterization and photoisomerization via intramolecular hydrogen shift. Phys Chem Chem Phys 2022; 24:8881-8889. [PMID: 35362501 DOI: 10.1039/d1cp05556a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Two new sulfinyl radicals, CHF2SO˙ and CH2FSO˙, have been generated in the gas phase through homolytic cleavage of the weak S-S bonds in disulfane oxides CHF2S(O)SCF3 and CH2FS(O)SCF3 by high-vacuum flash pyrolysis (HVFP) at ca. 500 °C. The IR spectroscopy characterization of the two fluoromethylsulfinyl radicals in solid N2 (10 K), Ar (10 K), and Ne (3 K) matrices reveals the presence of two conformers for CHF2SO˙ (gauche and cis) and one conformer for CH2FSO˙ (gauche). Upon 266 nm laser irradiation, these radicals undergo both isomerization and decomposition in the matrices. In addition to the dominant formation of the elusive oxathiyl radicals CHF2OS˙ (gauche and cis) and CH2FOS˙ (gauche) via 1,2-alkyl migration, two higher-energy carbon-centered radicals ˙CF2SOH and ˙CHFSOH bearing similar molecular structures to hydroperoxyalkyl radicals (˙QOOH) form via intramolecular 1,3-hydrogen shift in the two sulfinyl radicals. Additionally, the involvement of 1,3-hydrogen shift in CHF2OS˙ and CH2FOS˙ is also indicated by the observation of the fragmentation species. The identification of these radicals by matrix-isolation IR and UV-vis spectroscopy is aided by the quantum chemical calculations at the B3LYP/6-311++G(3df,3pd) level of theory. The stability of the isomers of the two sulfinyl radicals CHF2SO˙ and CH2FSO˙ has been discussed according to the experimental observations and also based on the CCSD(T)-F12a/aug-cc-pVTZ//B3LYP/6-311++G(3df,3pd) calculated energy profiles.
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Affiliation(s)
- Bifeng Zhu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai, 200433, China.
| | - Junjie Jiang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai, 200433, China.
| | - Bo Lu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai, 200433, China.
| | - Xiaolong Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai, 200433, China.
| | - Xiaoqing Zeng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, Shanghai, 200433, China.
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2
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Spectroscopic characterization of two peroxyl radicals during the O 2-oxidation of the methylthio radical. Commun Chem 2022; 5:19. [PMID: 36697894 PMCID: PMC9814412 DOI: 10.1038/s42004-022-00637-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Accepted: 01/26/2022] [Indexed: 01/28/2023] Open
Abstract
The atmospheric oxidation of dimethyl sulfide (DMS) yields sulfuric acid and methane sulfonic acid (MSA), which are key precursors to new particles formed via homogeneous nucleation and further cluster growth in air masses. Comprehensive experimental and theoretical studies have suggested that the oxidation of DMS involves the formation of the methylthio radical (CH3S•), followed by its O2-oxidation reaction via the intermediacy of free radicals CH3SOx• (x = 1-4). Therefore, capturing these transient radicals and disclosing their reactivity are of vital importance in understanding the complex mechanism. Here, we report an optimized method for efficient gas-phase generation of CH3S• through flash pyrolysis of S-nitrosothiol CH3SNO, enabling us to study the O2-oxidation of CH3S• by combining matrix-isolation spectroscopy (IR and UV-vis) with quantum chemical computations at the CCSD(T)/aug-cc-pV(X + d)Z (X = D and T) level of theory. As the key intermediate for the initial oxidation of CH3S•, the peroxyl radical CH3SOO• forms by reacting with O2. Upon irradiation at 830 nm, CH3SOO• undergoes isomerization to the sulfonyl radical CH3SO2• in cryogenic matrixes (Ar, Ne, and N2), and the latter can further combine with O2 to yield another peroxyl radical CH3S(O)2OO• upon further irradiation at 440 nm. Subsequent UV-light irradiation (266 nm) causes dissociation of CH3S(O)2OO• to CH3SO2•, CH2O, SO2, and SO3. The IR spectroscopic identification of the two peroxyl radicals CH3SOO• and CH3S(O)2OO• is also supported by 18O- and 13C-isotope labeling experiments.
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3
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Euceda N, Jahnke J, Espinal A, Louis MF, Bashkin E, Roccanova P, Espaillat A, Fuentes GV, Nieto F, Gao R. Thioguanine restoration through type I photosensitization-superoxide oxidation-glutathione reduction cycles. Phys Chem Chem Phys 2021; 23:5069-5073. [PMID: 33655288 DOI: 10.1039/d1cp00101a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
UVA-induced deleterious effect of thiopurine prodrugs including azathioprine, 6-mercaptopurine and 6-thioguanine (6-TG) increases the risk of cancer development due to the incorporation of 6-TG in patients' DNA. The catalytic mechanism by which thiobases act as a sustained oxidant producer has yet to be explored, especially through the Type I electron transfer pathway that produces superoxide radicals (O2˙-). Under Fenton-like conditions O2˙- radicals convert to extremely reactive hydroxyl radicals (˙OH), thus carrying even higher risk of biological damage than that induced by the well-studied type II reaction. By monitoring 6-TG/UVA-induced photochemistry in mass spectra and superoxide radicals (O2˙-) via nitro blue tetrazolium (NBT) reduction, this work provides two new findings: (1) in the presence of reduced glutathione (GSH), the production of O2˙-via the type I reaction is enhanced 10-fold. 6-TG thiyl radicals are identified as the primary intermediate formed in the reaction of 6-TG with O2˙-. The restoration of 6-TG and concurrent generation of O2˙- occur via a 3-step-cycle: 6-TG type I photosensitization, O2˙- oxidation and GSH reduction. (2) In the absence of GSH, 6-TG thiyl radicals undergo oxygen addition and sulfur dioxide removal to form carbon radicals (C6) which further convert to thioether by reacting with 6-TG molecules. These findings help explain not only thiol-regulation in a biological system but chemoprevention of cancer.
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Affiliation(s)
- Nelson Euceda
- Chemistry and Physics Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA.
| | - Joyce Jahnke
- Chemistry and Physics Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA.
| | - Aileen Espinal
- Chemistry and Physics Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA.
| | - Monique F Louis
- Chemistry and Physics Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA.
| | - Edan Bashkin
- Chemistry and Physics Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA.
| | - Patricia Roccanova
- Biological Sciences Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA
| | - Abraham Espaillat
- Chemistry and Physics Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA.
| | - German V Fuentes
- Chemistry and Physics Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA.
| | - Fernando Nieto
- Biological Sciences Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA
| | - Ruomei Gao
- Chemistry and Physics Department, SUNY College at Old Westbury, Old Westbury, NY 11568, USA.
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4
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Gerbig D, Bernhardt B, Wende RC, Schreiner PR. Capture and Reactivity of an Elusive Carbon-Sulfur Centered Biradical. J Phys Chem A 2020; 124:2014-2018. [PMID: 32065851 DOI: 10.1021/acs.jpca.9b11795] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The initial oxidation product of dimethyl sulfide in the marine boundary layer, the methyl thiomethyl radical, has remained elusive. A structurally analogous biradical with one radical center in the α-position to a sulfur atom could now be obtained by UV irradiation of p-nitrobenzaldehyde dithiane isolated in solid dinitrogen (N2) or Ar at cryogenic temperatures. A spin-forbidden reaction with triplet dioxygen (3O2) does not occur. The dithiane of o-nitrobenzaldehyde rather undergoes a series of rearrangements under the same conditions, resulting in overall photodeprotection.
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Affiliation(s)
- Dennis Gerbig
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Bastian Bernhardt
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Raffael C Wende
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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5
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Affiliation(s)
- Isaac A. Ramphal
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
- Department of Chemistry, University of California, Berkeley, California, USA
| | - Chin Lee
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
- Department of Chemistry, University of California, Berkeley, California, USA
| | - Daniel M. Neumark
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
- Department of Chemistry, University of California, Berkeley, California, USA
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6
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Wu Z, Chen C, Liu J, Lu Y, Xu J, Liu X, Cui G, Trabelsi T, Francisco JS, Mardyukov A, Eckhardt AK, Schreiner PR, Zeng X. Caged Nitric Oxide-Thiyl Radical Pairs. J Am Chem Soc 2019; 141:3361-3365. [PMID: 30758958 DOI: 10.1021/jacs.8b12746] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
S-Nitrosothiols (RSNO) are exogenous and endogenous sources of nitric oxide in biological systems due to facile homolytic cleavage of the S-N bonds. By following the photolytic decomposition of prototypical RSNO (R = Me and Et) in Ne, Ar, and N2 matrixes (<10 K), elusive caged radical pairs consisting of nitric oxide (NO•) and thiyl radicals (RS•), bridged by O···S and H···N connections, were identified with IR and UV/vis spectroscopy. Upon red-light irradiation, both caged radical pairs (RS•···•ON) vanish and reform RSNO. According to the calculation at the CASPT2(10,8)/cc-pVDZ level (298.15 K), the dissociation energy of MeS•···•ON amounts to 4.7 kcal mol-1.
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Affiliation(s)
- Zhuang Wu
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Changyun Chen
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Jie Liu
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Yan Lu
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Jian Xu
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Xiangyang Liu
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry , Beijing Normal University , Beijing 100875 , China
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry , Beijing Normal University , Beijing 100875 , China
| | - Tarek Trabelsi
- Department of Earth and Environmental Science and Department of Chemistry , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - Joseph S Francisco
- Department of Earth and Environmental Science and Department of Chemistry , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - Artur Mardyukov
- Institute of Organic Chemistry , Justus Liebig University , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany
| | - André K Eckhardt
- Institute of Organic Chemistry , Justus Liebig University , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry , Justus Liebig University , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany
| | - Xiaoqing Zeng
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
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7
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Dong X, Deng G, Wu Z, Xu J, Lu B, Trabelsi T, Francisco JS, Zeng X. Spectroscopic Identification of H 2
NSO and syn
- and anti
-HNSOH Radicals. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xuelin Dong
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Guohai Deng
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Zhuang Wu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Jian Xu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Bo Lu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Tarek Trabelsi
- Department of Chemistry; University of Nebraska-Lincoln; Lincoln NE 68588 USA
| | - Joseph S. Francisco
- Department of Chemistry; University of Nebraska-Lincoln; Lincoln NE 68588 USA
| | - Xiaoqing Zeng
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
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8
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Chattopadhyay A, Samanta M, Mondal K, Chakraborty T. Mid-infrared quantum cascade laser spectroscopy probing of the kinetics of an atmospherically significant radical reaction,
$$\hbox {CH}_{3}\hbox {O}_{2}+\hbox {NO}_{2}+\hbox {M}\rightarrow \hbox {CH}_{3}\hbox {O}_{2}\hbox {NO}_{2}+\hbox {M}$$
CH
3
O
2
+
NO
2
+
M
→
CH
3
O
2
NO
2
+
M
, in the gas phase. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1451-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Dong X, Deng G, Wu Z, Xu J, Lu B, Trabelsi T, Francisco JS, Zeng X. Spectroscopic Identification of H2
NSO and syn
- and anti
-HNSOH Radicals. Angew Chem Int Ed Engl 2018; 57:7513-7517. [DOI: 10.1002/anie.201802738] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Xuelin Dong
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Guohai Deng
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Zhuang Wu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Jian Xu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Bo Lu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
| | - Tarek Trabelsi
- Department of Chemistry; University of Nebraska-Lincoln; Lincoln NE 68588 USA
| | - Joseph S. Francisco
- Department of Chemistry; University of Nebraska-Lincoln; Lincoln NE 68588 USA
| | - Xiaoqing Zeng
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
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10
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Mardyukov A, Schreiner PR. Atmospherically Relevant Radicals Derived from the Oxidation of Dimethyl Sulfide. Acc Chem Res 2018; 51:475-483. [PMID: 29393624 DOI: 10.1021/acs.accounts.7b00536] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The large number and amounts of volatile organosulfur compounds emitted to the atmosphere and the enormous variety of their reactions in various oxidation states make experimental measurements of even a small fraction of them a daunting task. Dimethyl sulfide (DMS) is a product of biological processes involving marine phytoplankton, and it is estimated to account for approximately 60% of the total natural sulfur gases released to the atmosphere. Ocean-emitted DMS has been suggested to play a role in atmospheric aerosol formation and thereby cloud formation. The reaction of ·OH with DMS is known to proceed by two independent channels: abstraction and addition. The oxidation of DMS is believed to be initiated by the reaction with ·OH and NO3· radicals, which eventually leads to the formation of sulfuric acid (H2SO4) and methanesulfonic acid (CH3SO3H). The reaction of DMS with NO3· appears to proceed exclusively by hydrogen abstraction. The oxidation of DMS consists of a complex sequence of reactions. Depending on the time of the day or altitude, it may take a variety of pathways. In general, however, the oxidation proceeds via chains of radical reactions. Dimethyl sulfoxide (DMSO) has been reported to be a major product of the addition channel. Dimethyl sulfone (DMSO2), SO2, CH3SO3H, and methanesulfinic acid (CH3S(O)OH) have been observed as products of further oxidation of DMSO. Understanding the details of DMS oxidation requires in-depth knowledge of the elementary steps of this seemingly simple transformation, which in turn requires a combination of experimental and theoretical methods. The methylthiyl (CH3S·), methylsulfinyl (CH3SO·), methylsulfonyl (CH3SO2·), and methylsulfonyloxyl (CH3SO3·) radicals have been postulated as intermediates in the oxidation of DMS. Therefore, studying the chemistry of sulfur-containing free radicals in the laboratory also is the basis for understanding the mechanism of DMS oxidation in the atmosphere. The application of matrix-isolation techniques in combination with quantum-mechanical calculations on the generation and structural elucidation of CH3SOx (x = 0-3) radicals is reviewed in the present Account. Experimental matrix IR and UV/vis data for all known species of this substance class are summarized together with data obtained using other spectroscopic techniques, including time-resolved spectroscopy, electron paramagnetic resonance spectroscopy, and others. We also discuss the reactivity and experimental characterization of these species to illustrate their practical relevance and highlight spectroscopic techniques available for the elucidation of their geometric and electronic structures. The present Account summarizes recent results regarding the preparation, characterization, and reactivity of various radical species with the formula CH3SOx (x = 0-3).
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Affiliation(s)
- Artur Mardyukov
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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11
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Wu Z, Xu J, Deng G, Chu X, Sokolenko L, Trabelsi T, Francisco JS, Eckhardt AK, Schreiner PR, Zeng X. The Trifluoromethyl Sulfinyl and Oxathiyl Radicals. Chemistry 2017; 24:1505-1508. [DOI: 10.1002/chem.201705142] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Zhuang Wu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Jian Xu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Guohai Deng
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Xianxu Chu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Liubov Sokolenko
- Organofluorine Chemistry Department, Institute of Organic Chemistry; National Academy of Sciences of Ukraine; Kiev-94 02660 Ukraine
| | - Tarek Trabelsi
- University of Nebraska-Lincoln; Lincoln Nebraska 68526 USA
| | - Joseph S. Francisco
- Department of Chemistry; Purdue University; West Lafayette Indiana 47907 USA
| | - André K. Eckhardt
- Institute of Organic Chemistry; Justus-Liebig University; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry; Justus-Liebig University; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Xiaoqing Zeng
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P.R. China
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12
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Liu Q, Wu Z, Xu J, Lu Y, Li H, Zeng X. Methoxysulfinyl Radical CH3OSO: Gas-Phase Generation, Photochemistry, and Oxidation. J Phys Chem A 2017; 121:3818-3825. [DOI: 10.1021/acs.jpca.7b02561] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qifan Liu
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 215123 Suzhou, P. R. China
| | - Zhuang Wu
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 215123 Suzhou, P. R. China
| | - Jian Xu
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 215123 Suzhou, P. R. China
| | - Yan Lu
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 215123 Suzhou, P. R. China
| | - Hongmin Li
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 215123 Suzhou, P. R. China
| | - Xiaoqing Zeng
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 215123 Suzhou, P. R. China
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13
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Abstract
Our computational investigations broaden the scope of currently available experimental results on the methylsulfinyl radical, a key atmospheric species.
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Affiliation(s)
- Marissa L. Estep
- Center for Computational Quantum Chemistry
- University of Georgia
- Athens
- Georgia
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14
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Huang YH, Lee YP. Infrared absorption of gaseous CH2BrOO detected with a step-scan Fourier-transform absorption spectrometer. J Chem Phys 2014; 141:164302. [DOI: 10.1063/1.4897982] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Yu-Hsuan Huang
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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15
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Copeland G, Lee EPF, Williams RG, Archibald AT, Shallcross DE, Dyke JM. Determination of the photolysis rate coefficient of monochlorodimethyl sulfide (MClDMS) in the atmosphere and its implications for the enhancement of SO2 production from the DMS + Cl2 reaction. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:1557-1565. [PMID: 24280000 DOI: 10.1021/es402956r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this work, the photolysis rate coefficient of CH3SCH2Cl (MClDMS) in the lower atmosphere has been determined and has been used in a marine boundary layer (MBL) box model to determine the enhancement of SO2 production arising from the reaction DMS + Cl2. Absorption cross sections measured in the 28000-34000 cm(-1) region have been used to determine photolysis rate coefficients of MClDMS in the troposphere at 10 solar zenith angles (SZAs). These have been used to determine the lifetimes of MClDMS in the troposphere. At 0° SZA, a photolysis lifetime of 3-4 h has been obtained. The results show that the photolysis lifetime of MClDMS is significantly smaller than the lifetimes with respect to reaction with OH (≈ 4.6 days) and with Cl atoms (≈ 1.2 days). It has also been shown, using experimentally derived dissociation energies with supporting quantum-chemical calculations, that the dominant photodissocation route of MClDMS is dissociation of the C-S bond to give CH3S and CH2Cl. MBL box modeling calculations show that buildup of MClDMS at night from the Cl2 + DMS reaction leads to enhanced SO2 production during the day. The extra SO2 arises from photolysis of MClDMS to give CH3S and CH2Cl, followed by subsequent oxidation of CH3S.
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Affiliation(s)
- G Copeland
- School of Chemistry, University of Southampton , Highfield, Southampton SO17 1BJ, U.K
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16
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Huang YH, Chen JD, Hsu KH, Chu LK, Lee YP. Transient Infrared Absorption Spectra of Reaction Intermediates Detected with a Step-scan Fourier-transform Infrared Spectrometer. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300415] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Bil A, Grzechnik K, Mierzwicki K, Mielke Z. OH-Induced Oxidative Cleavage of Dimethyl Disulfide in the Presence of NO. J Phys Chem A 2013; 117:8263-73. [DOI: 10.1021/jp4047837] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrzej Bil
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383
Wrocław, Poland
| | - Katarzyna Grzechnik
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383
Wrocław, Poland
| | - Krzysztof Mierzwicki
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383
Wrocław, Poland
| | - Zofia Mielke
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383
Wrocław, Poland
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18
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Su YT, Huang YH, Witek HA, Lee YP. Infrared Absorption Spectrum of the Simplest Criegee Intermediate CH
2
OO. Science 2013; 340:174-6. [DOI: 10.1126/science.1234369] [Citation(s) in RCA: 223] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Yu-Te Su
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu 30010, Taiwan
| | - Yu-Hsuan Huang
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu 30010, Taiwan
| | - Henryk A. Witek
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu 30010, Taiwan
| | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu 30010, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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Reisenauer HP, Romański J, Mlostoń G, Schreiner PR. Matrix isolation and spectroscopic properties of the methylsulfinyl radical CH3(O)S˙. Chem Commun (Camb) 2013; 49:9467-9. [DOI: 10.1039/c3cc45379k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Salta Z, Kosmas AM, Lesar A. Computational investigation of the peroxy radicals CH3S(O)nOO and the peroxynitrates CH3S(O)nOONO2 (n=0, 1, 2). COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Grzechnik K, Mielke Z. Structure and photochemistry of nitrous acid–methanethiol complexes in solid argon. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.03.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Lin SY, Lee YP. Infrared absorption of gaseous benzoyl radical C6H5CO recorded with a step-scan Fourier-transform spectrometer. J Phys Chem A 2012; 116:6366-74. [PMID: 22369517 DOI: 10.1021/jp2120934] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A step-scan Fourier-transform infrared spectrometer coupled with a multipass absorption cell was utilized to monitor the gaseous transient species benzoyl radical, C(6)H(5)CO. C(6)H(5)CO was produced either from photolysis of acetophenone, C(6)H(5)C(O)CH(3), at 248 nm or in reactions of phenyl radical (C(6)H(5)) with CO; C(6)H(5) was produced on photolysis of C(6)H(5)Br at 248 nm. One intense band at 1838 ± 1 cm(-1), one weak band at 1131 ± 3 cm(-1), and two extremely weak bands at 1438 ± 5 and 1590 ± 10 cm(-1) are assigned to the C═O stretching (ν(6)), the C-C stretching mixed with C-H deformation (ν(15)), the out-of-phase C(1)C(2)C(3)/C(5)C(6)C(1) symmetric stretching (ν(10)), and the in-phase C(1)C(2)C(3)/C(4)C(5)C(6) antisymmetric stretching (ν(7)) modes of C(6)H(5)CO, respectively. These observed vibrational wavenumbers and relative IR intensities agree with those reported for C(6)H(5)CO isolated in solid Ar and with values predicted for C(6)H(5)CO with the B3LYP/aug-cc-pVDZ method. The rotational contours of the two bands near 1838 and 1131 cm(-1) simulated according to rotational parameters predicted with the B3LYP/aug-cc-pVDZ method fit satisfactorily with the experimental results. Additional products BrCO, C(6)H(5)C(O)Br, and C(6)H(5)C(O)C(6)H(5) were identified in the C(6)H(5)Br/CO/N(2) experiments; the kinetics involving C(6)H(5)CO and C(6)H(5)C(O)Br are discussed.
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Affiliation(s)
- Shu-Yu Lin
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
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Lee YF, Kong LJ, Lee YP. Infrared absorption of CH3OSO and CD3OSO radicals produced upon photolysis of CH3OS(O)Cl and CD3OS(O)Cl in p-H2 matrices. J Chem Phys 2012; 136:124510. [DOI: 10.1063/1.3696894] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Orlando JJ, Tyndall GS. Laboratory studies of organic peroxy radical chemistry: an overview with emphasis on recent issues of atmospheric significance. Chem Soc Rev 2012; 41:6294-317. [PMID: 22847633 DOI: 10.1039/c2cs35166h] [Citation(s) in RCA: 240] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- John J Orlando
- National Center for Atmospheric Research, Earth System Laboratory, Atmospheric Chemistry Division, Boulder, USA.
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Golec B, Chen JD, Lee YP. Infrared absorption of gaseous benzoylperoxy radical C6H5C(O)OO recorded with a step-scan Fourier-transform spectrometer. J Chem Phys 2011; 135:224302. [DOI: 10.1063/1.3664304] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Chen JD, Lee YP. Infrared absorption of CH3OSO detected with time-resolved Fourier-transform spectroscopy. J Chem Phys 2011; 134:094304. [DOI: 10.1063/1.3556817] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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