Direct Observation of a Hydrogen-Bonded Charge-Transfer State of 4-Dimethylaminobenzonitrile in Methanol by Time-Resolved IR Spectroscopy†
Wai-Ming Kwok Dr.
Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Fax: (+44) 207-594-5801
Present address: Department of ChemistryThe University of Hong KongPokfulam Road, Hong Kong SAR (P.R. China)
Search for more papers by this authorMichael W. George Dr.
School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
Search for more papers by this authorDavid C. Grills Dr.
School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
Search for more papers by this authorChensheng Ma Dr.
Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Fax: (+44) 207-594-5801
Present address: Department of ChemistryThe University of Hong KongPokfulam Road, Hong Kong SAR (P.R. China)
Search for more papers by this authorPavel Matousek Dr.
Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK
Search for more papers by this authorAnthony W. Parker Dr.
Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK
Search for more papers by this authorDavid Phillips Prof.
Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Fax: (+44) 207-594-5801
Search for more papers by this authorWilliam T. Toner
Department of Physics, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK
Search for more papers by this authorMichael Towrie Dr.
Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK
Search for more papers by this authorWai-Ming Kwok Dr.
Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Fax: (+44) 207-594-5801
Present address: Department of ChemistryThe University of Hong KongPokfulam Road, Hong Kong SAR (P.R. China)
Search for more papers by this authorMichael W. George Dr.
School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
Search for more papers by this authorDavid C. Grills Dr.
School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
Search for more papers by this authorChensheng Ma Dr.
Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Fax: (+44) 207-594-5801
Present address: Department of ChemistryThe University of Hong KongPokfulam Road, Hong Kong SAR (P.R. China)
Search for more papers by this authorPavel Matousek Dr.
Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK
Search for more papers by this authorAnthony W. Parker Dr.
Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK
Search for more papers by this authorDavid Phillips Prof.
Department of Chemistry, Imperial College, Exhibition Road, London SW7 2AY, UK, Fax: (+44) 207-594-5801
Search for more papers by this authorWilliam T. Toner
Department of Physics, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK
Search for more papers by this authorMichael Towrie Dr.
Central Laser Facility, CLRC Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK
Search for more papers by this authorWe are grateful to the EPSRC for financial support through grants GR/R29062 and GR/M40486. This work was carried out at the Central Laser Facility, CLRC Rutherford Appleton Laboratory.
Graphical Abstract
Anomalies in the fluorescence spectra of dual fluorescence molecules explained? A comparison of the time-resolved IR absorption of the CN band of photoexcited 4-dimethylaminobenzonitrile in MeCN and MeOH provides the first direct observation of the formation of a hydrogen-bonded intramolecular charge-transfer (ICT) state in MeOH and its coexistence with a “free” ICT state (see picture). The so-called dual fluorescence will be triple, not dual.
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