Comparative studies on structure–nonlinearity relationships in a series of novel second-order nonlinear optical chromophores with different aromatic amine donors. (September 2015)

• Record Type: Journal Article
• Authors: Liu, Fenggang; Yang, Yuhui; Wang, Haoran; Liu, Jialei; Hu, Chaolei; Huo, Fuyang; Bo, Shuhui; Zhen, Zhen; Liu, Xinhou; Qiu, Ling
• Is Part Of: Dyes and pigments. Volume 120(2015)
• Page Start: 347
• Page End: 356
• Publication Date: 2015-09
• Subjects: Nonlinear optical materials -- Chromophore -- Second-order -- Electro-optic -- Donor -- Heteroatom; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2015.05.003
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A series of second-order nonlinear optical chromophores containing an identical π-bridge and electron acceptor but different, aromatic amine electron-donating groups have been synthesized and systematically investigated. The donors studied here include traditional donors carbazole, triphenylamine and N, N -diethylaniline and novel donor phenothiazine, phenoxazine and N -(4-methoxyphenyl)phenoxazine. The ultraviolet absorption, solvatochromic, redox properties, density functional theory calculations, thermal stabilities and electro-optic activities of these chromophores were systematically studied to compare the strength of the donors and illustrate the structure–performance relationships within six chromophores. The results show that the new donors have stronger electron-donating ability than traditional donors. Moreover, they show reduced energy gap, much larger molecular quadratic hyperpolarizability (μβ) and r 33 value. Exemplified by the N -(4-methoxyphenyl)phenoxazine chromophore, it showed nearly three times higher μβ and more than four times higher r 33 value than that of the N -hexylcarbazole containing chromophore. Graphical abstract: Highlights: Six chromophores with different donors had been synthesized and systematically investigated. The donor strength and structure–nonlinearity relationship were systematically investigated. The r33 value of the six chromophores were investigated.