The nitrospirobenzopyran, tethered at the 5′-end of the homothymidine, was thermally isomerized to colored merocyanine, which was converted reversibly to colorless spiropyran by visible light irradiation (λ > 490 nm). Concurrently with the spiropyran→merocyanine isomerization, melting temperature of the duplex with its complementary oligonucleotide was changed from 18.0 °C to 21.6 °C.
在同
胸苷 5′端系留的亚硝基螺
苯并呋喃在热异构化为有色梅洛菁,在可见光照射下(λ > 490 nm),梅洛菁可逆地转化为无色螺
吡喃。在螺
吡喃→梅洛青异构化的同时,与其互补寡核苷酸的双链体的熔化温度从 18.0 ℃ 升至 21.6 ℃。