97126-39-1

Upstream product

• 70877-18-8 1-Octadecyl-3,3-dimethyl-6'-nitrospiro<1>benzopyran> 
• 629-93-6 n-iodooctadecane 
• 1640-39-7 2,3,3-trimethylindoleniune 
• 73811-01-5 1-octadecyl-3,3-trimethyl-2-methyleneindoline 
• 73811-00-4 2,3,3-trimethyl-1-octadecyl-3H-indol-1-ium iodide 

Relevant academic research and scientific papers

Picosecond Time-Resolved Fluorescence Spectroscopy of the Photochromic Reaction of Spiropyran in Langmuir-Blodgett Films

The photochromic reaction of spiropyran merocyanine has been studied with 1'-octadecyl-3',3'-dimethyl-6-nitrospiro (SSP) incorporated in Langmuir- Blodgett (LB) films prepared in a mixed film with stearic acid, arachidic acid, and tripalmitine.Time-resolved fluorescence spectra and decay curves of SSP and its photoisomer, merocyanine (SMC), were measured with a picosecond time-correlated, single-photon-counting apparatus.When SSP in LB films was excited at 360 nm, two fluorescence bands were observed: one has a maximum at 660 nm, and the other has a relatively weak band at 530 nm.We assigned them respectively to the fluorescence band of SMC and an intermediate X as a precursor of SMC.The rigidity of the medium surrounding photochromic molecules is an important factor in determining the rate of reversible photoconversion of SSP SMC.

J-aggregate formation of spiropyran derivatives in LB and vapor-deposited thin films

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

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

Photochemical regulation of the electrical properties of the novel planar bilayer lipid membrane incorporating spiropyran derivatives

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.

1-OCTADECYL- AND 3,3-DIPHENYL-SUBSTITUTED PHOTOCHROMIC INDOLINOSPIROCHROMENES

A number of photochromic indolinospirochromenes that contain an octadecyl substituent in the 1 position were synthesized.The introduction of an octadecyl group in place of a methyl group increases the stability of the merocyanine form in solution but does not change its spectral characteristics.On the other hand, the introduction of phenyl groups in place of methyl groups in the 3 position does not change the stability of merocyanine but gives rise to a bathochromic shift of the long-wave absorption band.