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A promising photochromic fluorescent chemosensor1olinked with Schiff base unit was synthesized and the sensitivity test of1otoward Zn2+has been performed with detection limit up to 8.10 × 10−8M without any interference from Cd2+.

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C 26 H 18 F7NS, triclinic, P¯ , a = 8.492(18) CCDC no.: 1496664The crystal structure is shown in the gure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters.

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An asymmetrical photochromic diarylethene 1-(2cyano-1,5-dimethyl-4-pyrryl)-2-{(2-methyl-4hydroxymethylphe-nyl)-3-thienyl}perfluorocyclopentene (1o) was synthesized and its photochromic properties as well as reaction kinetics were investigated in detail. Upon irradiation with 297 nm UV light, diarylethene 1o exhibited photochromism in solution. Moreover, 1o also exhibited obviously fluorescence switches along with the photochromism.

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