Synthesis and optical properties of D-π-A chromophore with double carboxyl groups

Functional molecules with D-π-A structure were introduced to a new application direction of seed sterilization. According to the specific requirement of seed sterilization, two carboxyl groups were introduced to D-π-A molecules both in donor group and acceptor group. Such a modification improved the solubility of D-π-A molecule and the adhesion between D-π-A molecule and the surface of seed. Else, the functional D-π-A molecule prepared in this manuscript also showed us low delocalized energy and poor intermolecular interaction. The d33 value of chromophore a-COOH was also measured. Due to the poor donor and solubility in polycarbonate, the largest d33 value was just 16.2 pm/V.