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Article: Time-Resolved Spectroscopic Study of N,N–Di(4–bromo)nitrenium Ions in Acidic Aqueous Solution
Title | Time-Resolved Spectroscopic Study of N,N–Di(4–bromo)nitrenium Ions in Acidic Aqueous Solution |
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Authors | |
Keywords | nitrenium ion time resolved spectroscopy resonance Raman |
Issue Date | 2019 |
Publisher | Molecular Diversity Preservation International. The Journal's web site is located at http://www.mdpi.org/ijms |
Citation | International Journal of Molecular Sciences, 2019, v. 20 n. 21, p. article no. 5512 How to Cite? |
Abstract | Nitrenium ions are common reactive intermediates with high activities towards some biological nucleophiles. In this paper, we employed femtosecond transient absorption (fs-TA) and nanosecond transient absorption (ns-TA) as well as nanosecond time-resolved resonance Raman (ns-TR3) spectroscopy and density function theory (DFT) calculations to study the spectroscopic properties of the N(4,4′–dibromodiphenylamino)–2,4,6–trimethylpyridinium BF4− salt (1) in an acidic aqueous solution. Efficient cleavage of the N–N bond (4 ps) to form the N,N–di(4–bromophenyl)nitrenium ion (DN) was also observed in the acidic aqueous solution. As a result, the dication intermediate 4 appears more likely to be produced after abstracting a proton for the nitrenium ion DN in the acid solution first, followed by an electron abstraction to form the radical cation intermediate 3. These new and more extensive time-resolved spectroscopic data will be useful to help to develop an improved understanding of the identity, nature, and properties of nitrenium ions involved in reactions under acidic aqueous conditions. |
Persistent Identifier | http://hdl.handle.net/10722/286173 |
ISSN | 2023 Impact Factor: 4.9 2023 SCImago Journal Rankings: 1.179 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Du, L | - |
dc.contributor.author | YAN, Z | - |
dc.contributor.author | BAI, X | - |
dc.contributor.author | LIANG, R | - |
dc.contributor.author | Phillips, DL | - |
dc.date.accessioned | 2020-08-31T07:00:10Z | - |
dc.date.available | 2020-08-31T07:00:10Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | International Journal of Molecular Sciences, 2019, v. 20 n. 21, p. article no. 5512 | - |
dc.identifier.issn | 1661-6596 | - |
dc.identifier.uri | http://hdl.handle.net/10722/286173 | - |
dc.description.abstract | Nitrenium ions are common reactive intermediates with high activities towards some biological nucleophiles. In this paper, we employed femtosecond transient absorption (fs-TA) and nanosecond transient absorption (ns-TA) as well as nanosecond time-resolved resonance Raman (ns-TR3) spectroscopy and density function theory (DFT) calculations to study the spectroscopic properties of the N(4,4′–dibromodiphenylamino)–2,4,6–trimethylpyridinium BF4− salt (1) in an acidic aqueous solution. Efficient cleavage of the N–N bond (4 ps) to form the N,N–di(4–bromophenyl)nitrenium ion (DN) was also observed in the acidic aqueous solution. As a result, the dication intermediate 4 appears more likely to be produced after abstracting a proton for the nitrenium ion DN in the acid solution first, followed by an electron abstraction to form the radical cation intermediate 3. These new and more extensive time-resolved spectroscopic data will be useful to help to develop an improved understanding of the identity, nature, and properties of nitrenium ions involved in reactions under acidic aqueous conditions. | - |
dc.language | eng | - |
dc.publisher | Molecular Diversity Preservation International. The Journal's web site is located at http://www.mdpi.org/ijms | - |
dc.relation.ispartof | International Journal of Molecular Sciences | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | nitrenium ion | - |
dc.subject | time resolved spectroscopy | - |
dc.subject | resonance Raman | - |
dc.title | Time-Resolved Spectroscopic Study of N,N–Di(4–bromo)nitrenium Ions in Acidic Aqueous Solution | - |
dc.type | Article | - |
dc.identifier.email | Du, L: ailleen@hku.hk | - |
dc.identifier.email | Phillips, DL: phillips@hku.hk | - |
dc.identifier.authority | Phillips, DL=rp00770 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.3390/ijms20215512 | - |
dc.identifier.pmid | 31694248 | - |
dc.identifier.pmcid | PMC6862224 | - |
dc.identifier.scopus | eid_2-s2.0-85074478195 | - |
dc.identifier.hkuros | 313833 | - |
dc.identifier.volume | 20 | - |
dc.identifier.issue | 21 | - |
dc.identifier.spage | article no. 5512 | - |
dc.identifier.epage | article no. 5512 | - |
dc.identifier.isi | WOS:000498946100270 | - |
dc.publisher.place | Switzerland | - |
dc.identifier.issnl | 1422-0067 | - |