The invention discloses a fluorescent probe compound taking a
phenothiazine derivative modified by polyarylimidazole as a core structure as well as a preparation method and application of the fluorescent probe compound, and belongs to the technical field of fluorescent probes. The invention aims to solve the problem that the existing HClO / ClO-detection method generally has higher
detection limit and complicated procedures. The preparation method comprises the following steps: taking 10-butyl-10H-
phenothiazine-3-
formaldehyde, 4, 4 '-dibromobenzene,
ammonium acetate and
aniline as raw materials, carrying out cyclization reaction to synthesize an intermediate PI-Br, and then carrying out Suzuki
coupling reaction on the intermediate PI-Br and arylboronic acid containing
electron donating or
electron withdrawing
substituent groups to obtain target probe compounds PI-Ph, PI-Ph-OCH3, PI-Ph-CH3, PI-Ph-CN and PI-Ph-CHO. As a fluorescent probe compound, the compound has the characteristics of
high selectivity, low
detection limit, capability of identifying color change by naked eyes and the like on HClO / ClO-, can sensitively and intuitively detect HClO / ClO-through optical
signal change, and is particularly suitable for detection requirements of a complex
water sample system. According to the invention, the probe compound PI-Ph-CN is prepared into a fluorescent test strip, a convenient
field detection device is constructed, and real-time nondestructive determination of HClO / ClO-in a
water sample is realized.