Effect of the mismatch structure on crystal packing, physical properties and third-order nonlinearity of unsymmetrical twistacenes. (November 2016)

• Record Type: Journal Article
• Authors: Chen, Shulian; Xiao, Jinchong; Zhang, Xi; Shen, Xingxing; Liu, Xiaoyu; Shen, Fugang; Yi, Yuanping; Song, Yinglin
• Is Part Of: Dyes and pigments. Volume 134(2016)
• Page Start: 9
• Page End: 18
• Publication Date: 2016-11
• Subjects: Polycylic aromatic hydrocarbons -- Twistacene -- Single crystal -- Optical property -- Nonlinearity; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2016.06.031
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A novel family of unsymmetrical twistacene analogues were synthesized in a palladium-promoted cross-coupling reaction and fully characterized, where five-membered ring was embedded into the main skeleton int hese molecules. The formed all-carbon compounds appreciate a series of promising photophysical properties such as good thermal stability and photostability than that of acenes consisting of all six-membered rings. All of them emitted strong solution fluorescence covered a wide range from cyan to yellow. In addition, the nonlinear optical properties were further investigated through the top-hat Z-scan technique at 515 nm, which indicates that all of them presented excellent third-order nonlinear absorption effects. Graphical abstract: Five-membered ring-embedded unsymmetrical twistacenes were prepared that presented large third-order nonlinearity. Highlights: Five-membered ring-embedded unsymmetrical twistacenes were prepared. The formed molecules show high thermal stability and strong blue, green and yellow fluorescence. These molecules exhibited large third-order nonlinearity, which could be utilized in optical devices.