157662-67-4Relevant academic research and scientific papers
Photochemical regulation of the electrical properties of the novel planar bilayer lipid membrane incorporating spiropyran derivatives
Tanaka, Motomu,Yonezawa, Yoshiro
, p. 5160 - 5162 (1996)
We incorporated the alkyl chain substituted spiropyran derivatives, 1-methyl-3,3-dimethyl-6′-nitrospiro[indoline-2,2′-[2H][1]benzopyran] (SP1), 1-octadecyl-3,3-dimethyl-6′-nitrospiro[indoline-2,2′-[2H][1] benzopyran] (SP18), and 1-octadecyl-3,3-dimethyl-6′-nitro-8-[docosanoyloxymethyl]spiro[indoline-2, 2′-[2H][1]benzopyran] (SP1822) into the planar bilayer lipid membranes (BLM) of soybean lecithin for the first time, and the photoresponse of the BLM was monitored. When a dc voltage was applied across the BLM, the transmembrane current changed under alternate irradiation with ultraviolet light and visible light. Such a photoelectric response of the BLM seems to be caused by the change in the membrane conductivity due to photoisomerization of spiropyran.
J-aggregate formation of spiropyran derivatives in LB and vapor-deposited thin films
Matsumoto, Kouji,Shinohara, Takashi,Koshiba, Yasuko,Ueda, Yasukiyo,Ji, Zhenguo
, p. 17/[307]-26/[316] (2006)
J-aggregate formation in the films of spiropyran derivatives (SP1822 and SP18) prepared with Langumuir-Blodegett (LB) and vapor-deposition methods was investigated. In the films of SP1822, J-aggregate formation occurred with UV light illumination and thermal treatment. In the case of SP18 film, on the other hand, only photoisomerization occurred. When the PMC-form of SP18 was transferred onto a glass plate, J-like aggregate formation occurred after UV light illumination. By UV light illumination during evaporation process, SP1822 formed J-aggregate. Finally, SP1822 J-aggregate film oriented one-dimensionally was fabricated by using a PTFE layer as a substrate.
Photochromic and fluorescence studies of spiropyran indoline derivatives in the presence of acids
Kang, Heekyoung,Lee, Youn-Sik,Kim, Eunkyoung,Kang, Yongku,Kim, Dong Wook,Lee, Changjin
, p. 169/[363]-179/[373] (2007/10/03)
We synthesized 3′,3′-dimethyl-1′-octadecyl-6-nitrospiro- [2H-1-benzopyran-2,2′-indoline] (SP-18) and examined its photochromic behavior and fluorescence in the presence of acid. When strong acids such as HCl and dodecylbenzene-sulfonic acid (DBSA) were pr
