β Scribed by S. Murata; C. Iwanaga; T. Toda; H. Kokubun
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The quantum yield ratio r=& +&+ . , ofthe &-So and +S, fluorescences from azulene has been redetermined. With azulene in isopentane at 190 K, r=455 & 100. This value agrees with the lower limit, given by Huppert, Jortner and Rentzepis, but is an order of magnitude lower than that given by Gillispie
Azulene (symmetry C2,) is the only known example of a compound in which the fluorescence transition originates from the second electronically excited singlet state (S2 -SO) rather than from the lowest one (Sl -SO). It is shown that single annelation. lowering of symmetry (from C2\*, to C, or C2). in
## Abstract Interactions of several acridine dyes with DNA from different species were studied by measuring fluorescence lifetimes in the 2β30βnsec range, using the singleβphoton counting technique, and by measuring fluorescence quantum yields in the steady state. The results confirm the existence