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Mikhailov OV. The Physical Chemistry and Chemical Physics (PCCP) Section of the International Journal of Molecular Sciences in Its Publications: The First 300 Thematic Articles in the First 3 Years. Int J Mol Sci 2021; 23:ijms23010241. [PMID: 35008667 PMCID: PMC8745423 DOI: 10.3390/ijms23010241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 12/15/2021] [Indexed: 11/16/2022] Open
Abstract
The Physical Chemistry and Chemical Physics Section (PCCP Section) is one of the youngest among the sections of the International Journal of Molecular Sciences (IJMS)—the year 2021 will only mark three years since its inception [...]
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Affiliation(s)
- Oleg V Mikhailov
- Department of Analytical Chemistry, Certification and Quality Management, Kazan National Research Technological University, K. Marx Street 68, 420015 Kazan, Russia
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Zeppuhar AN, Falvey DE. Generation of N, N-Di(4-bromophenyl)nitrenium Ion under Acidic Conditions: Search for a Nitrenium Dication. J Org Chem 2020; 85:8844-8850. [PMID: 32589031 DOI: 10.1021/acs.joc.0c00686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The behavior of the N,N-di(4-bromophenyl)nitrenium ion under acidic aqueous conditions was examined via laser flash photolysis experiments. A long-lived species forms and can be assigned as the cation radical or the dication. This species is unreactive toward nucleophiles and reactive toward strong electron donors, consistent with a cation radical. Mechanistic analysis indicates that its formation is through a separate pathway compared to that of the nitrenium ion, suggestive of a triplet mechanism.
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Affiliation(s)
- Andrea N Zeppuhar
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742 United States
| | - Daniel E Falvey
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742 United States
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Du L, Yan Z, Zhu Z, Cheng SC, Zhang Y, Li X, Tang W, Phillips DL. Time-Resolved Spectroscopic Observation of Diphenylnitrenium Ion Reactions with Guanosine. J Org Chem 2020; 85:8792-8797. [PMID: 32527081 DOI: 10.1021/acs.joc.0c00517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Arylnitrenium ions have gained attention for their high reactivity toward guanosine, which in some cases has been linked to carcinogenesis. Although many studies have examined covalent addition reactions between arylnitrenium ions and guanosine, there is still some uncertainty regarding the attack position of nitrenium ions on guanosine and its derivatives. In this paper, we employ nanosecond transient absorption and nanosecond time-resolved resonance Raman spectroscopy to investigate the reaction between the N,N-di(4-bromophenyl) nitrenium ion (2) and guanosine. Our time-resolved spectroscopic results and photochemical product analysis results show that the reaction of guanosine with 2 generates an N7 intermediate that subsequently undergoes rearrangement and deprotonation to produce a C8 adduct. Comparing these results to our previous study between the 2-fluorenylnitrenium ion and guanosine indicates that the structure and properties of arylnitrenium ions are able to influence the reaction pathways and intermediate structures.
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Affiliation(s)
- Lili Du
- Department of Chemistry, The University of Hong Kong, Hong Kong S.A.R., P. R. China.,School of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Zhiping Yan
- Department of Chemistry, The University of Hong Kong, Hong Kong S.A.R., P. R. China.,Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Zhiyuan Zhu
- Department of Chemistry, The University of Hong Kong, Hong Kong S.A.R., P. R. China
| | - Shun-Cheung Cheng
- Department of Chemistry, The University of Hong Kong, Hong Kong S.A.R., P. R. China
| | - Yue Zhang
- Department of Chemistry, The University of Hong Kong, Hong Kong S.A.R., P. R. China
| | - Xuechen Li
- Department of Chemistry, The University of Hong Kong, Hong Kong S.A.R., P. R. China
| | - Wenjian Tang
- School of Pharmacy, Anhui Medical University, Meishan Road 81, Hefei 230032, P. R. China
| | - David Lee Phillips
- Department of Chemistry, The University of Hong Kong, Hong Kong S.A.R., P. R. China
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