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Synthesis and photochromic reactivity of macromolecules incorporating four dithienylethene units |
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| Authors: | Il Jung Hyunbong Choi Eunkyoung Kim Chai-Ho Lee Sang Ook Kang Jaejung Ko |
| Affiliation: | aDepartment of Chemistry, Korea University, Jochiwon, Chungnam 339-700, South Korea bDepartment of Chemical Engineering, Yonsei University 134 Sinchon-dong, Seodaemoon-gu, Seoul 120-749, South Korea cDepartment of Chemistry, Wonkwang University, Iksan, Jeonbuk 570-749, South Korea |
| Abstract: | Two macrocycles bearing four dithienylethene units were synthesized. Upon irradiation of the macrocycles 5 and 6 with ultraviolet light, only one or two photo-induced cyclization reaction occurs. Each isomers were isolated and analyzed by 1H NMR spectrum. The quantum yield of 5 and 6 are 0.58 and 0.64, respectively. The high value is due to the presence of enforced antiparallel conformation in the macrocycles 5 and 6. |
| Keywords: | Photoswitch Macrocycle Diarylethene High quantum yield |
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