Magnetic field effect on triplet formation as a probe of intersystem crossing mechanisms in benzo [a] pyrene diol epoxide derivative-guanosine complexes and covalent adducts
✍ Scribed by Vladimir Ya. Shafirovich; Vladimir A. Kuzmin; Nicholas E. Geacintov
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 562 KB
- Volume
- 222
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
The effects of magnetic fields on triplet formation have been examined in covalent benxo[a]pyrene diol epoxideNz-2'deoxyguanosine (BPDEdG) adducts, and noncovalently interacting tetraol (BPT)/dG hydrolysis products in aqueous and N,N'dimethylformamide (DMF) solutions. A magnetic field effect ( < 8%) of opposite sign and saturated at 10 mT on the yield of 'BPT triplets and radical anions BPT-' is observed in the BPT/dG system in DMF and is attributed to a hyperfime coupling mechanism. Neither formation of BPT-' nor magnetic field effects on 3BPT yields are observed in either the covalent or noncovalent interacting systems in water.