New organic 4‐(4‐methoxystyryl)‐1‐methylpyridinium crystals for nonlinear optical applications. (30th August 2022)

• Record Type: Journal Article
• Authors: Lee, Yun‐Sang; Yoon, Woojin; Yun, Hoseop; Jazbinsek, Mojca; Yu, In Cheol; Rotermund, Fabian; Kim, Dongwook; Kwon, O‐Pil
• Is Part Of: Bulletin of the Korean Chemical Society. Volume 43:Number 11(2022)
• Page Start: 1247
• Page End: 1253
• Publication Date: 2022-08-30
• Subjects: first hyperpolarizability -- nonlinear optics -- organic crystals; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/bkcs.12612
• Languages: English
• ISSNs: 0253-2964

Abstract

Abstract: In this study, an organic nonlinear optical salt crystal, 4‐(4‐methoxystyryl)‐1‐methylpyridinium 4‐bromobenzenesulfonate (MOS‐BBS), is newly reported. MOS‐BBS crystals exhibit perfectly parallel molecular ordering of 4‐(4‐methoxystyryl)‐1‐methylpyridinium (MOS) cationic chromophores with noncentrosymmetric P 1 space group symmetry, which provides an optimal configuration for maximizing the macroscopic second‐order optical nonlinearity. The macroscopic optical nonlinearity of the MOS‐BBS crystals is very large, with the diagonal effective first hyperpolarizability of 160 × 10 −30 esu. Furthermore, the MOS‐BBS crystals exhibit a high thermal crystal‐phase stability. The lowest phase transition temperature of the MOS‐BBS crystals is 265°C, which is ~90°C higher than that of previously reported MOS‐based crystals. Abstract : The new organic nonlinear optical salt crystal 4‐(4‐methoxystyryl)‐1‐methylpyridinium 4‐bromobenzenesulfonate (MOS‐BBS) exhibits a large macroscopic optical nonlinearity with the effective first hyperpolarizability of 160 × 10 −30 esu and a high thermal stability.