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The photochromic reaction of diarylethene 1o is shown in Scheme 1. F F F F F F F F F F F F UV Vis O S O S NH2 1o NH2 1c Scheme 1. Photochromism of diarylethenes 1o. Experiments The target diarylethenes were synthesized by the method as shown in Scheme 2. The structure of diarylethene 1o was characterized by 1H NMR spectroscopy. 1NMR spectra were recorded on 48 Advanced Research on Material Engineering, Electrical Engineering and Applied Technology II Bruker AV400 (400 MHz) spectrometer with CDCl3 as the solvent and tetramethylsilane as an internal standard.

The result indicated that the new photochromic diarylethene can be applied in high capacity optical storage [12]. Fig. 3 Experimental setup for writing and reading polarization spot patterns. 26 Advanced Research on Material Engineering, Electrical Engineering and Applied Technology II Summary A novel unsymmetrical diarylethene was synthesized to investigate its photochromism, kinetic and fluorescence. Diarylethene 1o exhibited photochromism in hexane solution. The present results are useful for the design of efficient photoactive and excellent characteristic diarylethene compounds.

The red colored solution reverted to colorless upon irradiation with visible light (λ > 450 nm), indicating that 1c returned to the initial state 1o, and a clear isosbestic point was observed at 330 nm. Figure 1. 0 × 10-5 mol L-1) at room temperature. Fluorescence of Diarylethene. Fluorescent properties can be useful in molecular scale optoelectronics, but for digital photoswitching of fluorescence. 0 nm. As shown in Figure 2, the fluorescence intensity of diarylethene 1o Advanced Materials Research Vol.

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