Charge transfer and stacking in solution of N-purinoylaminopyrimidine

S. Cohen, G. Gabor, R. Rubinstein, A. Vincze

Research output: Contribution to journalArticlepeer-review


The high extinction (ε{lunate} = 17000) absorption at 341 nm, and the intense fluorescence (φ = 0.7) at 420 nm of 5-(N-purin-6-oyl)-4,6 diaminopyrimidine are assigned to an intramolecular charge transfer (CT) transition across space. At the isoelectric point (pH 7.8) intermolecular stacking occurs and as a result the intramolecular: CT is reduced. This implies the electrostatic character of stacking forces.

Original languageEnglish
Pages (from-to)456-459
Number of pages4
JournalChemical Physics Letters
Issue number3
StatePublished - 15 Sep 1976


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