Spectral study of the properties of photochromic polysubstituted lactones

The spectral and photothermal properties of thermally irreversible derivatives of dihetarylethenes, lactones, whose open form shows fluorescence, are studied. It is shown that the nature of substituents determines not only the absorptive but also the luminescent properties of these compounds, as well as their photocoloration and fluorescence quantum yields. The obtained dependences of the properties of lactones on their structure are important for targeted synthesis of compounds that can be used in the creation of two-photon reversible recording media with fluorescence reading of optical information suitable for application in 3D optical memory on optical disks.