TY - JOUR
T1 - Enhanced thermal stability and electro-optic activity from fluorene-based nonlinear optical chromophores
AU - Liu, Fenggang
AU - Yu, Canwen
AU - Qin, Gangzhi
AU - Peng, Meishan
AU - Wang, Ziwei
AU - Li, Ziheng
AU - Wu, Shuangke
AU - Li, Chunlin
AU - Zhang, Maolin
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 21805049) and Guangzhou Municipal Science and Technology Project (No.201904010176) for the financial support.
PY - 2020/8/8
Y1 - 2020/8/8
N2 - Two series of nonlinear optical chromophores G1–G4 and J1-J4 based on diethylaminophenyl or julolidinyl-based donor and tricyanovinyldihydrofuran acceptor have been synthesized. Compared to the unmodified isophorone bridge of chromophore G1 and J1, the bridges of chromophores G2/J2 and G3-G4/J3-J4 were modified with tert-butyldimethylsilyl (TBDMS) groups and fluorene group, respectively. In addition, we introduced bulky tert-butyldiphenylsilyl (TBDPS) groups to the donor of chromophore G4 and J4 to further increase poling efficiency. The results show that the chromophores G3-G4/J3-J4 modified with fluorene groups on the bridge have higher stability and larger electro-optic coefficient than chromophores G1-G2 and J1-J2. Electro-optical films doped with chromophore G1-G4 and J1-J4 have been poled to give r33 values of 69, 96, 118, 133, 143, 201, 240 and 261 pm/V at 1.31 μm, respectively. All these provide valuable insight into understanding of the impact of an isolation group on the performance of chromophores.
AB - Two series of nonlinear optical chromophores G1–G4 and J1-J4 based on diethylaminophenyl or julolidinyl-based donor and tricyanovinyldihydrofuran acceptor have been synthesized. Compared to the unmodified isophorone bridge of chromophore G1 and J1, the bridges of chromophores G2/J2 and G3-G4/J3-J4 were modified with tert-butyldimethylsilyl (TBDMS) groups and fluorene group, respectively. In addition, we introduced bulky tert-butyldiphenylsilyl (TBDPS) groups to the donor of chromophore G4 and J4 to further increase poling efficiency. The results show that the chromophores G3-G4/J3-J4 modified with fluorene groups on the bridge have higher stability and larger electro-optic coefficient than chromophores G1-G2 and J1-J2. Electro-optical films doped with chromophore G1-G4 and J1-J4 have been poled to give r33 values of 69, 96, 118, 133, 143, 201, 240 and 261 pm/V at 1.31 μm, respectively. All these provide valuable insight into understanding of the impact of an isolation group on the performance of chromophores.
UR - http://hdl.handle.net/10754/664771
UR - https://linkinghub.elsevier.com/retrieve/pii/S0143720820314480
UR - http://www.scopus.com/inward/record.url?scp=85089439669&partnerID=8YFLogxK
U2 - 10.1016/j.dyepig.2020.108751
DO - 10.1016/j.dyepig.2020.108751
M3 - Article
SN - 1873-3743
VL - 183
SP - 108751
JO - Dyes and Pigments
JF - Dyes and Pigments
ER -