Spectroscopic Properties of Curcumin: Orientation of Transition Moments

• DOI: 10.1021/jp104075f
• Publication Date: 2010-09-14T19:53:21Z
• Authors: Anindita Mukerjee; Thomas J. Sørensen; Amalendu P. Ranjan; Sangram Raut; Ignacy Gryczynski; Jamboor K. Vishwa...; Zygmunt Gryczynski
• Keywords: Hydrogen atom

Curcumin, a naturally occurring yellow-orange pigment with potent antioxidant and antitumor properties, has been attracting researchers from wide range of fields including chemistry, spectroscopy, biology, medicine. Ultrafast excited-state processes such as solvation intramolecular hydrogen atom transfer (ESIHT) make curcumin an attractive agent for photodynamic therapy. In this report we present studies linear dichroism fluorescence anisotropy in oriented isotropic media. The results show transition moments (long wavelength absorption emission) along the long molecular axis. Comparison excitation media suggests that is probably associated conformational changes can be constrained highly stretched poly(vinyl alcohol) (PVA) film.