Engineering hydrogen bonding to align molecular dipoles in organic solids for efficient second harmonic generation.

ABSTRACT: Considering nearly infinite design possibilities, organic second harmonic generation (SHG) molecules are believed to have long-term promise. However, because of the tendency to form dipole-antiparallel crystals that lead to zero macroscopic polarization, it is difficult to design a nonlinear optical (NLO) material based on organic molecules. In this manuscript, we report a new molecule motif that can form asymmetric organic solids by controlling the degree of hydrogen bonding through protonation. A conjugated polar organic molecule was prepared with a triple bond connecting an electron-withdrawing pyridine ring and an electron-donating thiophene ring. By controlling the degree of hydrogen bonding through protonation, two different crystal packing motifs are achieved. One crystallizes into

SUBMITTER: Zhao R 

PROVIDER: S-EPMC9601317 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature