Near-infrared fluorescent probe for detecting hydrogen sulfide as well as preparation method and application of near-infrared fluorescent probe

The invention belongs to the technical field of organic synthesis, and particularly relates to a near-infrared fluorescent probe for detecting hydrogen sulfide as well as a preparation method and an application of the near-infrared fluorescent probe. The molecular formula of the fluorescent probe is C42H30N2O5S2, and the structural formula of the fluorescent probe is shown in the specification. The disulfide bond of the fluorescent probe reacts with H2S to break the bond, the sulfydryl of the broken disulfide bond attacks carbonyl in a nucleophilic manner, a rhodamine dye molecular monomer is released, and the fluorescence intensity is enhanced by nearly 10 times and is accompanied by obvious color change, so that the fluorescent probe is relatively rapid in H2S atopic recognition reaction, good in selectivity and relatively high in sensitivity, and the detection limit reaches 7.161*10 M. 本发明属于有机合成技术领域，具体涉及一种用于检测硫化氢的近红外荧光探针及其制备方法和应用。所述荧光探针的分子式为C42H30N2O5S2，结构式如下：。本发明荧光探针的二硫键与H2S反应而断键，断裂的二硫键的巯基对羰基亲核进攻，释放出罗