Jinbao Guo

Beijing University of Chemical Technology

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Jie Wei

Beijing University of Chemical Technology

Siyang Lin

Beijing University of Chemical Technology

Huai Yang

Peking University

Quan Li

Southeast University

Jingjing Gao

Wuhan Textile University

Hui Cao

Hainan University

Juntao Li

China Academy of Engineering Physics

Yan-Rong He

Northeastern University

Qingyan Fan

Beijing University of Chemical Technology

Jinghui Qiao

Beijing University of Chemical Technology

Cooperative Institutions

Beijing University of Chemical Technology

100

Chinese Academy of Sciences

University of Science and Technology Beijing

Peking University

Sichuan University

Harbin Institute of Technology

University of Chinese Academy of Sciences

Shanghai Jiao Tong University

Xi'an Jiaotong University

Zhejiang University

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A photoswitchable circularly polarized luminescent cholesteric superstructure: direct visualization and dynamic modulation of the amplified luminescence dissymmetry factor

Journal of Materials Chemistry C (2022)

Jinghui Qiao Yan-Rong He Siyang Lin Qingyan Fan Jinbao Guo

Amplifying and reversibly photoswitching luminescence dissymmetry factor of the CPL signal in a luminescent cholesteric superstructure is proposed. This CLC-based CPL active material has great potential in information displaying and encrypting field.

Superstructure

Modulation (music)

10.1039/d2tc00424k

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Citations (19)

Cluster‐Triggered Self‐Luminescence, Rapid Self‐Healing, and Adaptive Reprogramming Liquid Crystal Elastomers Enabled by Dynamic Imine Bond

Advanced Materials (2024)

Qingyan Fan Yuting Tang Haonan Sun Dekang Guo Jiawei Ma

Abstract The integration of advanced functions and diverse practical applications calls for multifunctional liquid crystal elastomers (LCEs); however, the structure‐intrinsic luminescence and excellent mechanical properties of LCEs have not yet been explored. In this study, clusteroluminescence (CL)‐based LCEs (CL‐LCEs) are successfully fabricated without depending on large conjugated structures, thereby avoiding redundant organic synthesis and aggregation‐caused quenching. The experimental and theoretical results reveal that secondary amine (–NH–) and imine (–C = N–) groups play vital roles in determining the presence of fluorescence in CL‐LCEs. Based on the above observation, the strategy universalization and a molecular library for constructing CL‐LCEs are further demonstrated. Meanwhile, the dynamic bond of imine bonds endows the CL‐LCE system with rapid self‐healing under mild conditions (70 °C in 10 min), excellent stretchability, and adaptive programmable characteristics. Furthermore, the self‐luminescent performance enables visual detection of the self‐healing process. Finally, CL‐based information storage and anticounterfeiting are successfully realized and their applications in fiber actuators and fluorescent textiles are demonstrated. The distinctive luminescence and dynamic chemistry presented in this work has significant implications in elucidating the mechanism of CL and providing new strategies for the rational design of novel multifunctional LCE materials.

Imine

Reprogramming

Self-healing material

10.1002/adma.202401315

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Citations (16)

Electrochemical Behavior and Specific Capacitance of Polyaniline/Silver Nanoparticle/Multi-walled Carbon Nanotube Composites

Chinese Journal of Chemical Physics (2014)

Jia Li Di Zhang Jinbao Guo Jie Wei

In this work, we fabricated the polyaniline/silver nanoparticle/multi-walled carbon nanotube (PANI/Ag/MWCNT) composites by in situ polymerization of aniline on the wall of Ag/MWCNTs with different aniline to Ag/MWCNT mass ratios. The chemical structure of the ternary composites was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Scanning electron microscope and high-resolution transmission electron microscopy were used to observe the morphology of the ternary composites. The results showed that the polyaniline PANI layer was prepared successfully and it covered Ag/MWCNTs completely. In addition, Ag nanoparticles between the MWCNT core and the PANI layer existed in the form of elemental crystal, which could contribute to the electrochemical performance of the composites. Then we prepared the composite electrodes and studied their electrochemical behaviors in 1 mol/L KOH. It was found that these composite electrodes had very low impedance, and exhibited lower resistance, higher electrochemical activity, and better cyclic stability compared with pure PANI electrode. Particularly, when the mass ratio of aniline to Ag/MWCNTs was 5:5, the composite electrode displayed a small equivalent series resistance (0.23 Ω) and low interfacial charge transfer resistance (<0.25 Ω), as well as 160 F/g of the maximum specific capacitance at a current density of 0.25 A/g in KOH solution. We could conclude that the composite material had potential applications as cathode materials for lithium batteries and supercapacitors.

10.1063/1674-0068/27/06/718-724

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Citations (12)

Recent progress in oblique heliconical cholesteric liquid crystal materials

Chinese Journal of Liquid Crystals and Displays (2022)

Xiang-hui TIAN Hao SUN Shuang-shuang ZENG Hai-yi LIN Jinbao Guo

Cholesteric liquid crystal

10.37188/cjlcd.2022-0249

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Study of the interaction between icariin and human serum albumin by fluorescence spectroscopy

Journal of Molecular Structure (2007)

Guowen Zhang Qingmin Que Junhui Pan Jinbao Guo

Icariin

Human serum albumin

10.1016/j.molstruc.2007.09.002

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Citations (300)

Simultaneous optical tuning of reflection and fluorescence in a self-organized simple 3D cubic structure by α-cyanodiarylethene-based chiral fluorescence photoswitches

Journal of Materials Chemistry C (2023)

Jing Jing Wang Yan-Rong He Shan Li Qingyan Fan Jinbao Guo

A novel optically-tunable BPLC system enabled by an α -cyanodiarylethene fluorescence photoswitch is reported, in which the phototuning of both reflection and fluorescence of BPII with a self-organized simple 3D cubic structure is demonstrated.

Photoswitch

Reflection

10.1039/d3tc02692b

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Citations (8)

Photo/heat/electricity/pressure-driven photonic pattern with multimode memory effect

Chemical Engineering Journal (2022)

Yuanyuan Shang Jun‐Chao Liu Bo Guan Jinbao Guo Tomiki Ikeda

Bistability

Azobenzene

10.1016/j.cej.2022.141215

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Citations (11)

Research Actualities and Application of Reactive Distillation Technique

Fine Chemical Intermediates (2005)

Jinbao Guo

The development and the application of the reactive distillation were reviewed,and the reactive distillation colum and the catalyst bed were introduced. The mathematic models and the dasign equation of the reactive distillation column were summarized. The application and the possible field of the reactive distillation were also mentioned.

Reactive distillation

Source

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A Photo‐ and Thermo‐Driven Azoarene‐Based Circularly Polarized Luminescence Molecular Switch in a Liquid Crystal Host

Angewandte Chemie (2023)

W.P. Kang Yuqi Tang Xianyu Meng Siyang Lin Xinfang Zhang

Abstract The development of chiral optical active materials with switchable circularly polarized luminescence (CPL) signals remains a challenge. Here an azoarene‐based circularly polarized luminescence molecular switch, ( S, R, S )‐switch 1 and ( R, R, R )‐switch 2 , are designed and prepared with an ( R )‐binaphthyl azo group as a chiral photosensitive moiety and two ( S )‐ or ( R )‐binaphthyl fluorescent molecules with opposite or the same handedness as chiral fluorescent moieties. Both switches exhibit reversible trans/cis isomerization when irradiated by 365 nm UV light and 520 nm green light in solvent and liquid crystal (LC) media. In contrast with the control ( R, R, R )‐switch 2 , when switch 1 is doped into nematic LCs, polarization inversion and switching‐off of the CPL signals are achieved in the resultant helical superstructure upon irradiation with 365 nm UV and 520 nm green light, respectively. Meanwhile, the fluorescence intensity of the system is basically unchanged during this switching process. In particular, these variations of the CPL signals could be recovered after heating, realizing the true sense of CPL reversible switching. Taking advantage of the unique CPL switching, the proof‐of‐concept for “a dual‐optical information encryption system” based on the above CPL active material is demonstrated.

Molecular switch

Moiety

10.1002/ange.202311486

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Citations (9)

A Photo‐ and Thermo‐Driven Azoarene‐Based Circularly Polarized Luminescence Molecular Switch in a Liquid Crystal Host

Angewandte Chemie International Edition (2023)

W.P. Kang Yuqi Tang Xianyu Meng Siyang Lin Xinfang Zhang

The development of chiral optical active materials with switchable circularly polarized luminescence (CPL) signals remains a challenge. Here an azoarene-based circularly polarized luminescence molecular switch, (S, R, S)-switch 1 and (R, R, R)-switch 2, are designed and prepared with an (R)-binaphthyl azo group as a chiral photosensitive moiety and two (S)- or (R)-binaphthyl fluorescent molecules with opposite or the same handedness as chiral fluorescent moieties. Both switches exhibit reversible trans/cis isomerization when irradiated by 365 nm UV light and 520 nm green light in solvent and liquid crystal (LC) media. In contrast with the control (R, R, R)-switch 2, when switch 1 is doped into nematic LCs, polarization inversion and switching-off of the CPL signals are achieved in the resultant helical superstructure upon irradiation with 365 nm UV and 520 nm green light, respectively. Meanwhile, the fluorescence intensity of the system is basically unchanged during this switching process. In particular, these variations of the CPL signals could be recovered after heating, realizing the true sense of CPL reversible switching. Taking advantage of the unique CPL switching, the proof-of-concept for "a dual-optical information encryption system" based on the above CPL active material is demonstrated.

Molecular switch

Moiety

10.1002/anie.202311486

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Citations (56)