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- W2120852592 abstract "The photochromism of four non-thermochromic derivatives of dianthrone, in nonpolar solvents, was investigated. Photocoloration takes place with quantum yields close to unity at temperatures down to −160°C. No photodecoloration takes place. Thermal decoloration is a first-order reaction, with activation energies of about 13–14 kcal mole−1. At very low temperatures and high viscosities the quantum yield of photocoloration drops sharply, and a new unstable colored modification is formed. The latter converts spontaneously into the normal colored form, at somewhat higher temperatures. Flash experiments show that photocoloration at room temperature takes place within the lifetime of the flash (ca. 5 μs), but this is no longer so at low temperatures." @default.
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- W2120852592 date "1969-01-01" @default.
- W2120852592 modified "2023-10-09" @default.
- W2120852592 title "Photochromism in Dianthrone and Related Compounds. Part III. Solutions in Aliphatic Hydrocarbons" @default.
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- W2120852592 doi "https://doi.org/10.1002/ijch.196900019" @default.
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