Abstract
Verdazyl radicals have been obtained from non-symmetric alkadiynyl ethers ofp-hydroxybenzaldehyde. Using these radicals, the effect of the distance between the conjugated diyne fragment and the bulky tetrazinyl substituent on the ability to solid-state polymerization under UV irradiation has been studied. It has been shown that the rate of solid-state polymerization (accompanied by the preservation of the radical site) is increased with an increase in the number of methylene groups in the alkadiyne fragment.
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Cherry coloration of formazans 4a, 4b disappeared during 15 min, and the mixture became clay-colored.
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Kostryukov, S.G., Pryanichnikova, M.K., Kozlov, A.S. et al. Synthesis of Verdazyl Radicals with Different Number of Methylene Fragments in the Internal Conjugated Diyne Moiety and Their Ability to Solid-State Polymerization. Russ J Gen Chem 90, 832–838 (2020). https://doi.org/10.1134/S1070363220050126
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DOI: https://doi.org/10.1134/S1070363220050126