A comparative analysis on growth aspects and characterization of novel benzophenone derivatives

The growth aspects of two benzophenone derivatives such as 4-4′ dimethylbenzophenone (4-4′ DMBP) and 4-amino benzophenone (4-ABP) were investigated based on solute-solvent interactions in the growth medium. The structural, mechanical and optical properties of the two derivatives were comparatively investigated. It was found that the 4-ABP crystal was relatively harder compared to 4-4′ DMBP. The optical transmission study showed that the 4-4′ DMBP sample has high transparency especially in the UV region as it had the cut-off wavelength of 331 nm. On the other hand, the 4-ABP crystal has relatively low transparency in the visible region with the cut-off wavelength of 400 nm. The 4-4′ DMBP sample exhibited the SHG efficiency of 1.5 times that of KDP whereas the 4-ABP sample exhibited the SHG efficiency of 161 times that of KDP. The optical properties of the derivatives were discussed in relation with the molecular structure of the materials.