Heterocyclic Nonlinear Optical Chromophores Composed of Phenothiazine or Carbazole Donor and 2-Cyanomethylene-3-cyano-4,5,5-trimethyl-2,5-dihydrofuran Acceptor

Bulletin of the Korean chemical society

Dong Hoon Choi¹  Jae Hong Kim¹  Larry R. Dalton¹  Ja Youn Kim¹  Min Ju Cho¹  Seung Hwan Lee¹ 

关键词: Phenothiazine;    Carbazole;    Nonlinear optical chromophore;    Gradient donor moiety;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

We prepared the new nonlinear optical chromophores that show fairly high microscopic nonlinearity through intramolecular charge transfer. Phenothiazine and carbazole units played an important role to contribute high electron donability and connect the resonance pathway via conjugative effect in the cyclized ring beside the aromatic ring. Theoretical calculation, electrochemical analysis, and absorption spectroscopic study gave us useful information about the energy states and microscopic nonlinearities of two serial chromophores. We compared the microscopic nonlinearities of four chromophores with the conjugation length and electron donability in the push-pull type NLO chromophores. The effect of gradient donability and lengthening the conjugation were investigated on the electronic state and microscopic nonlinearity.

【 授权许可】

Unknown