摘要
以咔唑为电子供体,苯并噻唑为电子受体,合成了两种新型咔唑-苯并噻唑衍生物3-(2-苯并噻唑-2-基乙烯基)-N-乙基咔唑和3,6-二(2-苯并噻唑-2-基乙烯基)-N-乙基咔唑,通过核磁共振和分光光度计对其结构进行表征.利用刮刀法制备质量分数为4%的衍生物/聚酰亚胺的复合薄膜.采用透射光谱法和单光束Z-扫描技术分别测试了衍生物的线性和三阶非线性光学特性.Z扫描实验结果表明3-(2-苯并噻唑-2-基乙烯基)-N-乙基咔唑薄膜的非线性吸收系数和非线性折射系数分别为β1=-2.118 9×10-10 cm/W、r1=2.285 2×10-14 cm2/W,具有反饱和吸收特性和自聚焦效应;同时3,6-二(2-苯并噻唑-2-基乙烯基)-N-乙基咔唑薄膜的非线性吸收系数与非线性折射系数分别为β2=-1.275 6×10-9 cm/W、r2=-7.039 9×10-14 cm2/W,具有反饱和吸收特性和自散焦效应.
Two novel carbazole-benzothiazole derivatives 3-（（2-benzothiazole-2-yl）ethenyl）-N-ethylcarbazole and 3,6-bis（（2-benzothiazole-2-yl）ethenyl）-N-ethyl-carbazole containing carbazole as a donor and benzothiazole as an acceptor were synthesized and characterized by 1H-NMR spectra and UV-Visible spectrophotometer.The compound-doped polyimide thin film with mass fraction 4% were prepared by doctor blading on the glass substrate.The linear and nonlinear optical properties of the thin film were studied using the transmission spectrum method and Z-scan technique with 30 ps pulses at 1 064 nm,respectively.The values of the nonlinear absorption coefficient and nonlinear refractive index of the two thin films wereβ1=-2.118 9×10-10 cm/W,r1=2.285 2×10-14 cm2/W,β2=-1.275 6×10-9 cm/W,r2=-7.039 9×10-14 cm2/W,respectively.The Z-scan results revealed that the first compound-doped polyimide thin film exhibited reverse saturable absorption and self-focusing effect while the second compound-doped polyimide thin film exhibited reverse saturable absorption and self-defocusing effect.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2015年第1期117-122,共6页
Acta Photonica Sinica
基金
The National Natural Science Foundation of China(No.61275052)
关键词
电子供体-受体
咔唑
苯并噻唑
有机薄膜
透射光谱法
Z扫描技术
三阶非线性光学特性
Electron donor-acceptor
Carbazole
Benzothiazole
Organic thin film
Transmission spectrum method
Z-scan technique
Third-order nonlinear optical property
