12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

Identification of ultrafast processes in the spectroscopy of ZnPc

13 Jul 2011, 14:30
15m
Acro4

Acro4

Oral Presentation Track C - Lasers, Optics and Spectroscopy LOS

Speaker

Mr Saturnin OMBINDA-LEMBOUMBA (CSIR National Laser Centre)

Description

The transient absorption of Zinc phthalocyanine (ZnPc) has been studied by femtosecond pump-probe spectroscopy. We present results on the ultrafast spectroscopy of ZnPc, specifically identifying three ultrafast components observed. These are the inertial solvation dynamics (~1.8 ps), the dielectric solvation dynamics (~39 ps) and vibrational relaxation (~2.7 ps) in the electronic excited state. Results using different pump wavelengths, different sample concentrations and different solvents help to clarify the mechanisms behind the observed signals. The red shift of the ground state (Q band) spectra is also discussed.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? No
Level (Hons, MSc, <br> &nbsp; PhD, other)? PhD
Consider for a student <br> &nbsp; award (Yes / No)? Yes

Primary author

Mr Saturnin OMBINDA-LEMBOUMBA (CSIR National Laser Centre)

Co-authors

Dr Anton du Plessis (CSIR National Laser Centre) Dr Christine Steenkamp (Laser Research Institute, Department of physics, University of Stellenbosch, South Africa) Prof. Erich Rohwer (Laser Research Institute, Department of physics, University of Stellenbosch, South Africa) Dr Lourens Botha (CSIR National Laser Centre)

Presentation Materials