Absorption, Fluorescence, Photochemical and Thermal cis/trans Isomerization Reactivity of 1-Methyl-4-(4ʹ-aminostyryl)pyridinium Iodide
Abstract:The photo and thermal cis/trans isomerization reactions are studied for 1-methyl-4-(4 ʹaminostyryl)pyridinium iodide, Cy, which is prepared in the trans form. In a basic solution the trans form, Cy tr , cannot isomerise directly to the cis form. Its protonated form, Cy tr H + , is active and reacts photochemically from trans to cis configuration, Cy c H +. The quantum yields Ф tc and Ф ct are determined in water. Deprotonation process of Cy c H + yields the cis isomer, Cy c , which can thermally back to the st… Show more
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