A study of two thermostable NLO chromophores with different pi-electron bridges using fluorene as the donor

作者：Wang, Haoran; Liu, Fenggang; Yang, Yuhui; Zhang, Maolin; Peng, Chengcheng; Bo, Shuhui^*; Liu, Xinhou; Qiu, Ling; Zhen, Zhen

来源：New Journal of Chemistry, 2015, 39(2): 1038-1044.

DOI：10.1039/c4nj01653j

• NONLINEAR-OPTICAL CHROMOPHORES
• CONJUGATED BRIDGE
• POLED POLYMERS
• DESIGN
• DERIVATIVES
• PROPERTY
• COEFFICIENTS
• ORIENTATION
• TEMPERATURE
• MODULATION

Two chromophores C1 and C2 based on a fluorene electron donor with different p-electron bridges and the same electron acceptor have been synthesized and systematically characterized using NMR, MS and UV-vis absorption spectra. The energy gap between the ground state and the excited state and molecular nonlinearity were studied using UV-vis absorption spectroscopy, Density Functional Theory calculations and cyclic voltammetry measurements. The different properties between C1 and C2 were systematically compared. The results showed that C2 had a better performance than C1. The electrooptic coefficient of a poled film containing 25 wt% of C2 doped in amorphous polycarbonate afforded a value of 40 pm V-1 at 1310 nm. In addition, the excellent thermostability of C2 made itself a favourable candidate for practical application.

• 出版日期2015
• 单位中国科学院理化技术研究所; 中国科学院大学