El-Zeiny M. Ebeid, M. El‐Gamal, S. E. Morsi
Oct 1, 1986
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Influential Citations
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Journal
Photochemistry and Photobiology
Abstract
9‐Vinylanthracene (9‐VA) is an efficient fluorescer of fluorescence quantum yield = 0.91 0.03 in methanol (ex= 365 nm). This is consistent with its low photochemical quantum yields c (cx= 365 nm) of 0.005 in the absence of azobisisobutyronitrile (AIBN) radical initiator and c= 0.02 in the presence of 10‐2M dm‐3 AIBN. 9‐Vinylanthracene was shown to behave as a 9‐substituted anthracene undergoing photodimerization rather than the typical vinyl aryl monomer photopolymerization. The photodimer formation is supported by spectroscopic techniques. 9‐Vinylanthracene undergoes efficient fluorescence quenching in the presence of AIBN. Stern‐Volmer plots indicate a collisional mechanism. 9‐Vinylanthracene crystals as well as polycrystalline films give excimeric emission (max= 510 nm, cx= 380 nm) which is considerably red shifted (ca. 100 nm) compared with molecular emission.