Prof Helen Fielding

Physical Chemistry and Chemical Physics

Prof Helen Fielding

Address: Department of Chemistry, UCL
Phone No: +44 (0)20 7679 5575
Fax No: +44 (0)20 7679 7463
Extension: 25575
Photo of Helen Fielding

Research areas of interest include:

  • Nanosecond and femtosecond laser spectroscopy, photoelectron imaging, electrospray ionisation, computational chemistry
  • Organic photochemistry
  • Fluorescent protein chromophores
  • Photodynamic therapy
  • Surface photochemistry
  • Rydberg states


Helen Fielding Research Image

Our work involves using nanosecond and femtosecond lasers to investigate the spectroscopy and dynamics of excited states. Current applications include organic photochemistry, biological chromophores, photodynamic therapy and surface photochemistry.

We employ a variety of spectroscopic techniques including femtosecond pump-probe photoelectron imaging, nanosecond photodetachment spectroscopy, fluorescence lifetime and singlet oxygen measurements, and femtosecond laser induced desorption. In addition, we use computational chemistry to carry out electronic structure calculations to aid the interpretation of our experimental measurements.

Research Profile

Selected Publications

  1. R.S. Minns, D.S.N. Parker, T.J. Penfold, G.A. Worth and H.H. Fielding, Competing ultrafast intersystem crossing and internal conversion in the “channel 3” region of benzene, PCCP special issue 12 15607- 15615 (2010)
  2. A.D.G. Nunn, R.S. Minns, R. Spesyvtsev, M.J. Bearpark, M.A. Robb and H.H. Fielding, Ultrafast dynamics through conical intersections and intramolecular vibrational energy redistribution in styrene, PCCP special issue 12 15751-15759 (2010)

  3. A.R. McKay, M.E. Sanz, C.R.S. Mooney, R.S. Minns, E. Gill and H.H. Fielding, Development of a new photoelectron spectroscopy instrument combining an electrospray ion source and photoelectron imaging, Rev. Sci. Instrum. 81 123101-123109 (2010)

  4. A. Kirrander, Ch. Jungen and H.H. Fielding, Control of ionisation and dissociation by optical pulse trains, PCCP 12 8948-8952 (2010)
  5. D.S.N. Parker, A.D.G. Nunn, R.S. Minns and H.H. Fielding, Frequency doubling and Fourier domain shaping the output of a femtosecond optical parametric amplifier: Easy access to tuneable femtosecond pulse shapes in the deep ultraviolet, Appl. Phys. B - Lasers and Optics 94 181-186 (2009)

All Publications

  • BA Natural Sciences 1989. Newnham College, Cambridge University.
  • DPhil 1992. Chemistry Department, University of Oxford. Title of thesis "Rydberg atoms and molecules in external fields" Supervisor, Professor Tim Softley.
  • 1993 - 1994. 1851 Fellowship, University of Amsterdam.
  • 1994 - 1997. Lecturer, King's College London.
  • 1997 - 2002. Reader, King's College London.
  • 2002 - 2003. Professor, King's College London.
  • From Sep 2003. Professor of Chemical Physics, UCL.
  • RSC Harrison Prize 1996; RSC Marlow Medal 2001; EPSRC Advanced Research Fellow 2001 - 2006; RSC Corday-Morgan Medal 2005; IoP Moseley Medal 2008.