Abstract
AbstractUsing the fluorophore Tb3+ as a reporter, the effect of thallium (Tl+1) on the transfer of energy in polyribonucleotides and polydeoxynucleotides at room temperature has been studied. In p(G), p(G, I), and pd(G)6 thallium greatly increases the transfer of uv energy absorbed by the bases to Tb3+. In DNA, p(G, U), p(G, A), p(A, U), p(X), p(A), p(U), p(I), pd(G, A)6, and pd(G, T)5 thallium has little or no effect. Thallium increases intersystem crossing to the triplet states only in p(G), p(G, I), and pd(G)6, and the triplets overlap the excited singlet state in Tb3+. In those G‐ and X‐containing polymers showing little thallium effect, the evidence suggests that intersystem crossing is comparatively high to begin with. These polymers, including DNA, appear to transfer absorbed energy to triplet states efficiently at room temperature.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
