Excited states in porphyrin-DNA interactions

Pierre-Yves Turpin; Laurent Chinsky; Peter Mojzes

doi:10.1117/12.146142

17 June 1993 Excited states in porphyrin-DNA interactions

Pierre-Yves Turpin, Laurent Chinsky, Peter Mojzes

Proceedings Volume 1921, Laser Spectroscopy of Biomolecules; (1993) https://doi.org/10.1117/12.146142
Event: Laser Spectroscopy of Biomolecules: 4th International Conference on Laser Applications in Life Sciences, 1992, Jyvaskyla, Finland

Abstract

Complexes of Cu(TMpy-P4) with natural and synthetic DNAs have been investigated by using resonance Raman spectroscopy with both visible and UV laser excitations. Visible excitations in the Soret or the Q bands of the porphyrin provides important vibrational intensity enhancements from the Cu-porphyrin moiety, while UV excitations favors the Raman intensity enhancements from the DNA moieties of the complexes. In addition, high-power laser excitations in the visible region induces the formation of complexes between the porphyrin in one of its excited states and DNA thymine/uracil residues: this new species is called an exciplex. Here we focus on the structural conditions required for the exciplex formation, and attempts are made to determine the nature of this exciplex. On the other hand, the DNA conformational changes induced by the interaction with the porphyrin in its ground- and/or excited states are explored and discussed.

Citation Download Citation

Pierre-Yves Turpin, Laurent Chinsky, and Peter Mojzes "Excited states in porphyrin-DNA interactions", Proc. SPIE 1921, Laser Spectroscopy of Biomolecules, (17 June 1993); https://doi.org/10.1117/12.146142

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available