SCHEDULED MAINTENANCE
Fluorescence solvent shift data indicate the first excited singlet state of 2-piperidinoanthraquinone [2-PA] to be considerably more polar than its ground state. Amines quench the fluorescence of [2-PA] in cyclohexane by electron transfer. Alcohols also quench the fluorescence but by a different mechanism involving hydrogen bonding between the alcohol and the ground state of [2-PA] to form a complex that is itself fluorescent.
A. K. Davies, G. A. Gee, J. F. Mckellar and G. O. Phillips, J. Chem. Soc., Perkin Trans. 2, 1973, 1742 DOI: 10.1039/P29730001742
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