Spiropyran platinum complex, preparation thereof and application of spiropyran platinum complex in light-operated manual optical switch material

The invention discloses a spiropyran platinum complex, preparation thereof and application of the spiropyran platinum complex to a light-operated manual optical switch material. The general molecular formula of the spiropyran-based platinum complex is as shown in formula (1). According to the spiropyran platinum complex disclosed by the invention, direct excitation of visible light is realized by introducing a triplet state sensitizer. According to the present invention, the ultraviolet absorption spectrum can produce a new absorption peak near 575 nm, the spiropyrane SP group is converted from the non-planar spiropyrane to the MC configuration of the ring-opening conjugated structure under the 420 nm visible light illumination condition, and the luminescence of the platinum complex part and the absorption of the spiropyrane ring-opening MC structure overlap, such that the fluorescence intensity of the spiropyrane SP group can be substantially improved under the light illumination condition so as to substanti