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Fang Y, Sun Q, Chen X, Qiu Y, Chen C, Wang L, Zhao Y, Su Y, Li T, Zhang L, Wang X. Rational design and syntheses of aniline-based diradical dications: isolable congeners of quinodimethane diradicals. Org Chem Front 2021. [DOI: 10.1039/d0qo01265c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-electron oxidation of five aniline-based compounds 4,4′′-p/m-terphenyldiamines afforded the first isolable aniline-based diradical dications 12+–52+.
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de Carvalho DF, da Fonseca BG, Barbosa IL, Landi SM, de Sena LÁ, Archanjo BS, Sant'Ana AC. Surface-enhanced Raman scattering study of the redox adsorption of p-phenylenediamine on gold or copper surfaces. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 103:108-113. [PMID: 23257336 DOI: 10.1016/j.saa.2012.10.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 10/16/2012] [Accepted: 10/25/2012] [Indexed: 06/01/2023]
Abstract
The adsorption of the p-phenylenediamine (PPD(+)) radical cation on gold or copper nanoparticle (NP) surfaces was studied through surface-enhanced Raman scattering (SERS) spectroscopy, excited at 1064 nm. The SERS spectra were obtained from gold or copper NPs after exposure to non-oxidized p-phenylenediamine (PPD) aqueous solution, in millimolar concentration. The gold NPs were synthesized as nanoshells involving silica cores (SiO(2)@Au) and the copper NPs were obtained in aqueous medium, undergoing surface oxidation with the formation of Cu(II) oxide nanoshell (Cu@CuO). In the latter, the oxidative adsorption of PPD(+) led to the reduction of the copper oxide, present on NP surface, allowing obtaining the PPD(+) SERS spectrum. The vibrational assignments of the SERS spectra of the adsorbate were performed using the results of Density Functional Theory calculations of the Raman frequencies, which together with the SERS surface selection rules, allowed to infer the adsorption geometry of PPD(+) radical cation on both metallic surfaces. This work stress the investigation of redox processes involved in the molecular adsorption is imperative for the interpretation of the SERS results, which is even more important when copper surfaces are studied.
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Affiliation(s)
- Dhieniffer Ferreira de Carvalho
- Núcleo de Espectroscopia e Estrutura Molecular, Departamento de Química, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil
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Akai N, Kudoh S, Nakata M. UV Photolysis of 1,4-Diaminobenzene in a Low-Temperature Argon Matrix to 2,5-Cyclohexadiene-1,4-diimine via 4-Aminoanilino Radical. J Phys Chem A 2003. [DOI: 10.1021/jp022694z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nobuyuki Akai
- Graduate School of BASE (Bio-Applications and Systems Engineering), Tokyo University of Agriculture and Technology, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Satoshi Kudoh
- Graduate School of BASE (Bio-Applications and Systems Engineering), Tokyo University of Agriculture and Technology, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Munetaka Nakata
- Graduate School of BASE (Bio-Applications and Systems Engineering), Tokyo University of Agriculture and Technology, Naka-cho, Koganei, Tokyo 184-8588, Japan
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Ma C, Kwok WM, Matousek P, Parker AW, Phillips D, Toner WT, Towrie M. Excited States of 4-Aminobenzonitrile (ABN) and 4-Dimethylaminobenzonitrile (DMABN): Time-resolved Resonance Raman, Transient Absorption, Fluorescence, and ab Initio Calculations. J Phys Chem A 2002. [DOI: 10.1021/jp012765e] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C. Ma
- Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, UK, and Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK
| | - W. M. Kwok
- Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, UK, and Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK
| | - P. Matousek
- Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, UK, and Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK
| | - A. W. Parker
- Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, UK, and Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK
| | - D. Phillips
- Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, UK, and Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK
| | - W. T. Toner
- Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, UK, and Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK
| | - M. Towrie
- Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire, OX11 0QX, UK, and Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK
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Brouwer AM, Wilbrandt R. Vibrational Spectra of N,N-Dimethylaniline and Its Radical Cation. An Interpretation Based on Quantum Chemical Calculations. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960013s] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. M. Brouwer
- Amsterdam Institute of Molecular Studies, Laboratory of Organic Chemistry, University of Amsterdam, Nieuwe Achtergracht 129, NL-1018 WS Amsterdam, The Netherlands, and Department of Environmental Science and Technology, Risø National Laboratory, MIL-313, DK-4000 Roskilde, Denmark
| | - R. Wilbrandt
- Amsterdam Institute of Molecular Studies, Laboratory of Organic Chemistry, University of Amsterdam, Nieuwe Achtergracht 129, NL-1018 WS Amsterdam, The Netherlands, and Department of Environmental Science and Technology, Risø National Laboratory, MIL-313, DK-4000 Roskilde, Denmark
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Avdievich NI, Jeevarajan AS, Forbes MDE. Photoionization of N,N,N‘,N‘-Tetramethylphenylenediamine Studied by Q-Band Time-Resolved EPR Spectroscopy. Separation of Singlet and Triplet Ionization Channels. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp952314s] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nikolai I. Avdievich
- Venable and Kenan Laboratories, Department of Chemistry, CB# 3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Antony S. Jeevarajan
- Venable and Kenan Laboratories, Department of Chemistry, CB# 3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Malcolm D. E. Forbes
- Venable and Kenan Laboratories, Department of Chemistry, CB# 3290, University of North Carolina, Chapel Hill, North Carolina 27599
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