Ionic Photodissociation in Arylallyl Acetates¶

Abstract

We have synthesized several 3‐arylallyl acetates 1, 2, 3, 5 and 6, and E‐3‐(1‐naphthyl)‐2‐propene‐1‐ol 4 for studying ionic photodissociation. Compounds 1, 2 and 3 underwent an efficient ionic photodissociation in polar solvents like acetonitrile and methanol leading to the formation of rearranged acetate and methyl ether products, as well as undergoing an E–Z isomerization. The arylallyl alcohol 4 and the two arylallyl acetates 5 and 6 did not undergo ionic photodissociation. Quantum yields of product formation, quantum yields of fluorescence, solvent polarity effects and triplet‐sensitization studies indicated that a highly polarized excited singlet state is responsible for the ionic photodissociation. Both the singlet‐ and triplet‐excited states are effective in displaying E–Z isomerization in 1, 2, 3 and 4. Compounds 5 and 6 are highly fluorescent, and the fluorescence may be the excited state deactivation pathway along with internal conversion.

Leprosy: Knowledge and Attitudes of Physiotherapists in Nigeria

“…Since health workers are members of the community in which they normally socialise, they must acquire health skills and techniques to mould their attitudes (Ewhrudjakpor, 2008). It is also necessary to investigate the current levels of knowledge, attitudes and practices about leprosy that are exhibited by health workers at a given point in time, in order to form important decisions bothering on imparting the required knowledge and skills to the workers if need be (Rao et al, 2007). …”