1616558-95-2Relevant academic research and scientific papers
The synthesis of new double-donor chromophores with excellent electro-optic activity by introducing modified bridges
Yang, Yuhui,Wang, Haoran,Liu, Fenggang,Yang, Dan,Bo, Shuhui,Qiu, Ling,Zhen, Zhen,Liu, Xinhou
, p. 5776 - 5784 (2015)
A series of chromophores y1-y3 based on the same bis(N,N-diethyl)aniline donor and the tricyanofuran acceptor (TCF) linked together via the modified thiophene π-conjugation with different isolated groups have been synthesized and systematically investigated in this paper. Density functional theory (DFT) was used to calculate the HOMO-LUMO energy gaps and first-order hyperpolarizability (β) of these chromophores. Besides, to determine the redox properties of these chromophores, cyclic voltammetry (CV) experiments were performed. After introducing the isolation group into the thiophene, reduced energy gaps of 1.03 and 1.02 eV were obtained for chromophores y2 and y3, respectively, much lower compared to chromophore y1 ( Δ E = 1.13 eV). These chromophores showed better thermal stability with their decomposition temperatures all above 220 °C. Besides, compared with results obtained from the chromophore (y1) without the isolated group, these new chromophores show better intramolecular charge-transfer (ICT) absorption. Most importantly, the high molecular hyperpolarizability (b) of these chromophores can be effectively translated into large electro-optic (EO) coefficients (r33) in poled polymers. The electro-optic coefficient of poled films containing 25% wt of these new chromophores doped in amorphous polycarbonate (APC) afforded values of 149, 139 and 125 pm V-1 at 1310 nm for chromophores y1-y3, respectively. Besides, when the concentration was increased, the film containing chromophores y1 and y3 showed obvious phase separation, while the film with chromophore y2 showed the maximum r33 value of 146 pm V-1. Moreover, the electro-optic film prepared with these new chromophores showed greater stability. High r33 values indicated that the double donors of the bis(N,N-diethyl)aniline unit can efficiently improve the electron-donating ability and the isolated groups on the thiophene bridge can reduce intermolecular electrostatic interactions, thus enhancing the macroscopic EO activity. These properties, together with the good solubility, suggest the potential use of these new chromophores as advanced material devices.
Novel chromophores with excellent electro-optic activity based on double-donor chromophores by optimizing thiophene bridges
Yang, Yuhui,Bo, Shuhui,Wang, Haoran,Liu, Fenggang,Liu, Jialei,Qiu, Ling,Zhen, Zhen,Liu, Xinhou
, p. 139 - 146 (2015)
Three novel nonlinear optical chromophores based on the same bis(N,N-diethyl)aniline donor have been synthesized and systematically characterized. These chromophores showed good thermal stability and chromophore y1 showed the best thermal stability of 249 °C. Besides, compared with the chromophore (y1) without the substituted group, chromophores y2 and y3 show better intramolecular charge-transfer absorption. Most importantly, the high molecular hyperpolarizability of these chromophores can be effectively translated into large electro-optic coefficients. The electro-optic coefficient of poled films containing 25% wt of chromophores y1-y3 doped in amorphous polycarbonate afforded values of 149, 138 and 157 pm/V at 1310 nm for chromophores y1-y3 respectively. These results indicated that the double donors of bis(N,N-diethyl)aniline unit can efficiently improve the electron-donating ability and the special structure can reduce intermolecular electrostatic interactions, thus enhancing the macroscopic electro-optic activity. These properties, together with good solubility, suggest the potential use of these chromophores as advanced materials.
With double-to the body structure of the organic second-order non-linear optical chromophore and synthetic method and use (by machine translation)
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, (2017/10/13)
The present invention has offered a kind of double-to the body structure of the organic second-order non-linear optical chromophore, the with double to the body structure of the organic second-order non-linear optical chromophore has the following structure: Wherein R1 Is methyl or trifluoromethyl; R2 Is alkyl or phenyl. The invention used with a two-to the body structure of the electron donor, conjugated π electronic bridge and electronic receptor are combined together in the molecule after the electronic transmission capacity, can improve the electro-optic coefficient. In addition, the synthesized chromophores with double to the body structure, can effectively reduce the intermolecular interaction force. The said organic second order non-linear optical chromophore with amorphous polycarbonate doped for synthetic polymer film, the polymer film can be used as a synthetic light signal modulation material. (by machine translation)
Enhancement of electro-optic properties of bis(: N, N -diethyl)aniline based second order nonlinear chromophores by introducing a stronger electron acceptor and modifying the π-bridge
Zhang, Hua,Yang, Yuhui,Xiao, Hongyan,Liu, Fenggang,Huo, Fuyang,Chen, Lu,Chen, Zhuo,Bo, Shuhui,Qiu, Ling,Zhen, Zhen
, p. 6704 - 6712 (2017/07/22)
A series of highly polarizable chromophores y1, y2, yz1 and yz2 based on the same bis(N,N-diethyl)aniline donor, a tricyanofuran acceptor (TCF) and a CF3-Ph-TCF acceptor linked together via thiophene and modified thiophene π-conjugation have been synthesized and are systematically investigated in this paper. Density functional theory (DFT) calculations suggested that the molecular quadratic hyperpolarizability (β) value of the CF3-Ph-TCF based chromophore is 16.8% (yz1 compared with y1) and 46.8% (yz2 compared with y2) larger than those TCF based chromophores. These chromophores showed good thermal stability and their decomposition temperatures were all above 230 °C. Compared with the results obtained from the chromophores (y1 and y2) with the TCF acceptor, the new chromophores (yz1 and yz2) with the CF3-Ph-TCF acceptor show better intramolecular charge-transfer (ICT) absorption (108 nm and 97 nm red-shift). By doping chromophores y1, y2, yz1 and yz2 with a high loading of 25 wt% in amorphous polycarbonate (APC), electro-optic (EO) coefficients (r33) of up to 149, 139, 142 and 252 pm V-1 at 1310 nm can be achieved, respectively. A normalized r33 value of 15.57 × 10-18 pm cc per (V molecules) and an order parameter of (Φ) up to 27.3% was obtained for yz2 possessing the bis(N,N-diethyl)aniline donor, the alkoxy chain modified thiophene bridge and the CF3-Ph-TCF acceptor, which indicated that the structure-property relationship was essential. The high r33 value, good thermal stability and high yields suggest the potential use of new chromophores in a nonlinear optical area.
Synthesis and optical nonlinear property of Y-type chromophores based on double-donor structures with excellent electro-optic activity
Yang, Yuhui,Xu, Huajun,Liu, Fenggang,Wang, Haoran,Deng, Guowei,Si, Peng,Huang, Heyan,Bo, Shuhui,Liu, Jialei,Qiu, Ling,Zhen, Zhen,Liu, Xinhou
, p. 5124 - 5132 (2014/07/07)
New Y-type chromophores FTC-yh1 and FTC-yh2 containing bis(N,N-diethyl) aniline as a novel electron-donor, thiophene as a π-conjugated bridge and tricyanofuran (TCF) as an acceptor have been synthesized and systematically investigated in this paper. Density functional theory (DFT) was used to calculate the HOMO-LUMO energy gaps and first-order hyperpolarizability (β) of these chromophores. These chromophores showed better thermal stability with their decomposition temperatures all above 240 °C. Most importantly, the high molecular hyperpolarizability of these chromophores can be effectively translated into large electro-optic (EO) coefficients (r33) in poled polymers. The doped film-A containing 25 wt% chromophore FTC-yh1 displayed a value of 149 pm V-1 at 1310 nm, and the doped film-B containing FTC-yh2 showed a value of 143 pm V-1 at the concentration of 25 wt%. These values are almost four times higher than the EO activity of usually reported traditional single (N,N-diethyl)aniline nonlinear optical (NLO) chromophores FTC. High r33 values indicated that the double donors of the bis(N,N-diethyl)aniline unit can efficiently improve the electron-donating ability and reduce intermolecular electrostatic interactions, thus enhancing the macroscopic EO activity. These properties, together with the good solubility, suggest the potential use of the new chromophores as advanced material devices.
