Zhen Zhen

Name: 甄珍; Zhen Zhen

Organization: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences

Department: Key Laboratory of Photochemical Conversion and Optoelectronic Materials

Title: Researcher/Professor

Chemicals
References

Enhanced electro-optic activity from the triarylaminophenyl-based chromophores by introducing different steric hindrance groups

Co-reporter:Lu Chen, Yanling He, Fenggang Liu, Jialei Liu, Hua Zhang, Fuyang Huo, Shuhui Bo, Hongyan Xiao, Zhen Zhen

Materials Letters 2017 Volume 196(Volume 196) pp:

Publication Date(Web):1 June 2017

DOI:10.1016/j.matlet.2017.03.052

•Site-isolated chromophores L1 and L2 were synthesized with easy five steps and high yield.•Both chromophores L1 and L2 have good thermal stability and solubility in organic solvents.•The r33 values of film-L1/APC and film-L2/APC are respectively 2.3 times and 3 times of that of film-T1/APC.Chromophores L1 and L2 based on modified triphenylamine donors with diverse steric hindrance groups, have been designed in order to achieve large macroscopic r33 value of NLO polymers comparing to traditional triarylaminophenyl chromophore T1. In electro-optic activities, the doped film L1-APC and L2-APC showed r33 value of 37 pm/V and 49 pm/V at the concentration of 25 wt%, which were more than two times higher than that of film T1/APC (16 pm/V). These properties, together with the good thermostability, suggest the potential use of the new chromophores as advanced material devices.Download high-res image (50KB)Download full-size image

Synthesis and nonlinear optical properties of novel y-type polyurethanes containing different concentrations of chromophore

Co-reporter:Tingting Zhou;Guowei Deng;Jialei Liu;Shuhui Bo;Jieyun Wu;Ling Qiu;Xinhou Liu

Journal of Applied Polymer Science 2013 Volume 128( Issue 5) pp:2694-2700

Publication Date(Web):

DOI:10.1002/app.38283

Abstract

A new series of Y-type polyurethanes containing different concentrations of nonlinear optical (NLO) chromophore with aniline donor and tricyanofurane (TCF) acceptor have been successfully prepared, and characterized by FTIR, UV-Vis, and ¹H-NMR spectra. New polyurethanes were synthesized with different chromophore contents by introducing diol N, N-dihydroxyethylaniline or 4-[N, N-(dihydroxyethyl)amino]benzaldehyde. These NLO polyurethanes exhibit good film forming property and high thermal stability up to 281°C. The highest electro-optic coefficient (r₃₃) of polymers is up to 39 pm V⁻¹ measured by simple reflection technique at 1310 nm, and the temporal stability of the poling-induced order at elevated temperature of 80°C was much improved through the introducing of hydrogen bonding interaction in this system. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Synthesis and characterization of novel electro-optic chromophores based on 4-hydroxycarbazole

Co-reporter:Tingting Zhou, Jialei Liu, Guowei Deng, Jieyun Wu, Shuhui Bo, Ling Qiu, Xinhou Liu, Zhen Zhen

Materials Letters 2013 Volume 97() pp:117-120

Publication Date(Web):15 April 2013

DOI:10.1016/j.matlet.2013.01.100

Two novel nonlinear optical (NLO) chromophores with 4-hydroxycarbazole as the electron donor were successfully designed and synthesized. The 4-hydroxycarbazole had two reaction sites where the isolated groups were introduced to the chromophores. The prepared chromophores were characterized by MS, 1H NMR and UV–vis spectra. Poled films of the chromophores doped in APC afforded the maximum electro-optic (EO) coefficient (r33) of 40 pm/V at 1310 nm. This result was better than the similar chromophores reported using carbazole and aniline derivates as electron donor, which indicated that the introduction of isolated groups suppressed the dipole–dipole interaction between chromophores effectively and could aid the alignment of chromophores and improve the EO activity. This had been further demonstrated by the crystal structure analysis.Highlights► Two novel chromophores are successfully designed and synthesized. ► Introduction of isolated groups effectively suppressed the dipole–dipole interaction. ► The maximum r33 value of 40 pm/V at 1310 nm was obtained by corona poling.

Synthesis and nonlinear optical properties of a cross-linkable system using sol-gel approach

Co-reporter:Rong Zhang, Shuhui Bo, Jialei Liu, Tingting Zhou, Ling Qiu, Xinhou Liu, Zhen Zhen

Journal of Non-Crystalline Solids 2012 Volume 358(6–7) pp:1003-1008

Publication Date(Web):1 April 2012

DOI:10.1016/j.jnoncrysol.2012.01.029

Electro-optic (E-O) materials containing methacrylate-co-(methacrylate)propyl(triethoxy)silicane and chromophore FVB were prepared via sol-gel approach. The chromophore FVB was synthesized using microwave-assisted method. The cross-linkable E-O material exhibited excellent film quality, thermal stability and good E-O activity. The highest E-O coefficient value (r33) 39.8 pm/V and improved E-O stability was obtained in the copolymer with higher crosslink degree. The E-O stability was much better than other guest-host polymers at room temperature. The results of the E-O coefficients and thermal properties indicated that this kind of copolymer could not only effectively improve the stability but also increase the r33 values.Highlights► Chromophore and copolymer compose electro-optic (E-O) active system. ► E-O polymer with sol-gel branches forms crosslink structure after poling. ► Materials exhibit relative high E-O coefficient and good thermal stability. ► Appropriate increase of sol-gel content enhances the E-O coefficient and stability.

Synthesis and electro-optical features of a high T g polymer system with excellent electro-optic activity and thermal stability

Co-reporter:Rong Zhang;Jialei Liu;Shuhui Bo;Guowei Deng

Colloid and Polymer Science 2012 Volume 290( Issue 17) pp:1819-1823

Publication Date(Web):2012 November

DOI:10.1007/s00396-012-2764-1

Three chromophores with tricyanofuran and tricyanopyrroline electron acceptors were synthesized and doped in high glass transition temperature (Tg) polymer poly(N-(4-acetoxylphenyl)maleimide-co-styrene, NAPMI-co-ST). The electro-optic (EO), optical, and thermal properties of the doped poly(NAPMI-co-ST) were characterized and discussed. After being corona poled under 12 kV, this high Tg polymer material showed excellent EO activity and thermal stability. The highest EO coefficient (r33) reached 48.2 pm V−1 (1,310 nm) and could remain 90 % of the original value for 100 h at 85 °C. The EO coefficient was relatively higher compared with other high Tg EO polymers. The thermal stability was also very good and the manufacture process was convenient and applicable for device fabrication.

Synthesis and nonlinear optical properties of branched pyrroline chromophores

Co-reporter:Jialei Liu;Wenjun Hou;Shuwen Feng;Ling Qiu;Xinhou Liu

Journal of Physical Organic Chemistry 2011 Volume 24( Issue 6) pp:439-444

Publication Date(Web):

DOI:10.1002/poc.1772

Abstract

New tricyanopyrroline (TCP) chromophores with rigid–flexible dendron were prepared for second-order nonlinear optical (NLO) application. The chromophores were fully characterized using ultraviolet-visible spectroscopy, nuclear magnetic resonance spectroscopy and mass spectrometry. Thermal gravimetric analysis (TGA) revealed that the chromophores had excellent thermal stability. Large λ_max and high solvate chromic effects revealed that the chromophores had large second-order optical nonlinearity. The electro-optic coefficients (r₃₃) were measured in the chromophores-doped poly(bisphenol A carbonate) films at the fundamental wavelength of 1310 nm, and the highest γ₃₃ achieved was 217 pmV⁻¹. Copyright © 2010 John Wiley & Sons, Ltd.

Enhanced poling efficiency in rigid-flexible dendritic nonlinear optical chromophores

Co-reporter:Jialei Liu;Shuhui Bo;Xinhou Liu

Journal of Inclusion Phenomena and Macrocyclic Chemistry 2010 Volume 68( Issue 3-4) pp:253-260

Publication Date(Web):2010 December

DOI:10.1007/s10847-010-9781-9

A series of nonlinear optical chromophores with the strong electron-withdrawing tricyanopyrroline (TCP) acceptor and rigid-flexible dendron was synthesized and their thermal and optical properties were investigated. Modification of the TCP chromophore with rigid-flexible dendron groups provides reduction of dipole–dipole interactions and thus great improvement of the macroscopic electro-optic (EO) response of the polymeric materials obtained by incorporating these derivatives as a guest in a high Tg amorphous polycarbonate (APC). The best result was obtained with chromophore Lj-Dr1, with three rigid-flexible dendrons, which shows the largest EO activity (39 pm V−1 at 1,310 nm). Furthermore, all chromophores in this study possess good processability and exhibit high thermal decomposition temperatures (highest Td = 300 °C).

Synthesis, spectroscopic properties and electrochemistry of (2,9,16,23-tetrasubstituted phthalocyaninato) erbium complexes

Co-reporter:Shuhui Bo, Daihua Tang, Xinhou Liu, Zhen Zhen

Dyes and Pigments 2008 Volume 76(Issue 1) pp:35-40

Publication Date(Web):2008

DOI:10.1016/j.dyepig.2006.08.030

Two homoleptic bis(phthalocyaninato) erbium(III) complexes Er[Pc(β-OR/R)4]2 and two half-sandwich phthalocyaninato erbium(III) complexes (acac)Er[Pc(β-OR/R)4] (OR = 1-n-pentyloxy and R = tert-butyl) have been synthesized and characterized by MALDI-TOF-MS as well as by various spectroscopic methods. The introduction of different substituents (alkoxy or alkyl groups) to the phthalocyanine rings induced changes in the spectroscopic and electrochemical properties. Although the excited states of the homoleptic double- and triple-decker complexes usually are considered to lack fluorescence, in these cases, the homoleptic bis(phthalocyaninato) erbium(III) complexes Er[Pc(β-OR/R)4]2 displayed intense fluorescence compared with the half-sandwich phthalocyaninato erbium(III) complexes (acac)Er[Pc(β-OR/R)4]. For the two kinds of phthalocyaninato erbium(III) complexes, the pentyloxy-substituted complexes gave relatively intense emission compared with the tert-butyl-substituted complexes. These differences in the electronic ground state absorptions and in the excited state properties correlate with observations made from electrochemical measurements.