and or improved clarity i e signal to noise ratio in information storage can be achieved with organic films to achieve that desired high signal to noise ratio the medium should also be immune to environmental temperatures that is the threshold for transitions should be well above any temperature such as 100 u00b0 c to which the medium might be exposed the inventive medium meets all these needs in accordance with the present invention the information storage medium comprises an organic monomer material a polymer diluent and a uv curable cross linking agent compatible with the organic monomer the organic monomer materials have two stable crystalline states one of which is optically active i e chiral and the other of which is optically inactive i e racemic these function as the active recording material we have found that these materials make excellent media for optical storage of information the preferred materials have a single interannular bond connecting two chains of two or more benzene rings the benzene rings in each chain share common carbon carbon bonds so that the general formula for such compounds is str1 when heat is applied to materials of this structure rotation about the interannular bond is permitted so that a reversible transition between different crystalline forms can take place the different optical characteristics of the two crystalline structures are manifested as different light absorbance and reflectance changes in infrared raman and x ray diffraction spectra and different indexes of refraction among the preferred forms of the compounds having the structure and functioning in the novel optical storage medium are the biaryls including 1 1 39 binaphthyl having a general formula str2 1 1 39 bianthyryls having a general formula str3 and 4 4 39 biquinolyls having a general.