Benzimidazole series derivative with high fluorescence quantum yield and preparation method thereof

Provided is a benzimidazole series derivative with a high fluorescence quantum yield and a preparation method thereof. The general formula structure of the derivative is shown in the description, wherein R is any one of -H, 5'-Ch3, 5',6'-2CH3, 5'-Cl and 5'-F. The compound is easy and convenient to prepare, safe, short in process route, high in reaction speed, high in yield and free of pollution. Most importantly, the fluorescence quantum yield of the benzimidazole series derivative is high and can be adjusted by changing a substituent group on a benzene ring of benzimidazole, the fluorescence quantum yield of the benzimidazole series derivative reaches up to 0.42 to 0.80, and the limit that the fluorescence quantum yield of the compound is 0.25 is greatly broken through. 种具有高荧光量子产率的苯并咪唑系列衍生物及其制备方法，具有下列通式结构：其中：R为?H、5ˊ?CH、5ˊ,6ˊ?2CH、5ˊ?Cl、5ˊ?F中的任意种。该化合物的操作简便，安全，工艺路线短，反应速率快，产率高，无污染。最重要是本发明的苯并咪唑系列衍生物的荧光量子产率高，并且可以通过改变苯并咪唑苯环上的取代基，来调节此系列衍生物的荧光量子产率，使其荧光量子产率高达0.42～0.80，大大突破了此类化合物荧光量子产率0.25的限制。