SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2021
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IF 7.267
Zhen-Jie Huang,Feng Li,Jia-Ping Xie,Hong-Rong Mou,Cheng-Bin Gong,Qian Tang
The design and synthesis of broad absorption electrochromic materials (ECMs) that modulate visible and near infrared light are important for energy-saving smart windows . Most studies on broad absorption ECMs have focused on transition metal oxides , organic polymers and small organic molecules based on triarylamines, while studies on viologen analogues are scarce. In the current study, two tetra-substituted viologen analogues 4,4′,4″,4‴-(benzene-1,2,4,5-tetrayl)- tetrakis(1-butylpyridin-1-ium) (BTTBP) and 1,1,2,2-tetrakis(4-(1-butyl-pyridin-4-yl)- phenyl)ethane (TBPPE) were prepared by introducing benzene and tetraphenylethylene with large conjugation degrees as parent moieties. Compared with the conventional viologen 1,1′-dibutyl-(4,4′-bipyridine)-1,1′-diium without a conjugated parent, BTTBP and TBPPE exhibited high electrochromic performance and broad absorption to the near infrared region . TBPPE in particular exhibited excellent broad absorption electrochromic behavior with high optical contrast (63% at 733 nm and 46% at 997 nm), distinct color change (pale yellow to yellow-green to black-green), good cycling stability (attenuation in optical contrast of 1% after 1000 cycles at 733 nm) and excellent coloration efficiency (251 cm 2 /C) in the near infrared region. These findings provide a strategy for designing high-performance cathode broad absorption ECMs and a promising candidate for energy-saving smart windows.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
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IF 6.215
Sixuan Xiao,Yujie Zhang,Debao Xiao
Visualization of latent fingermarks has ever been realized through electrochromism (EC) on stainless steel used as an electrode of electrochromic device (ECD). However, enhancement of fingermarks on paper using EC remains unresolved. Considering the hydrophobicity differences between the protruding and the concave parts of sebum-containing fingermarks, we attempt to devise ECDs capable of visualizing latent fingermarks on copperplate paper. It is demonstrated that the sulfonated viologen, 1,1′-bis(3-sulfonatopropyl) viologen can be used as an excellent chromophore for latent fingermarks enhancement on copperplate paper using EC, with either 1,1′-ferrocenedimethanol, or vitamin C or potassium ferrocyanide/potassium ferricyanide as the electron mediator. The as-fabricated ECDs can display the characteristic second level details of latent fingermarks left on copperplate paper under a voltage of -1.2 V. This work opens a new avenue for visualizing latent fingermarks on copperplate paper, which is a frequently-used potential physical evidence in office and daily life that may be useful for forensics.
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DYES AND PIGMENTS
·
2019
·
IF 4.018
Yan Zhou,Qiang Ma,Erik B. Berda,Xincai Liu,Ce Wang,Danming Chao
The electrochemical manipulation of optical properties will be essential in engineering next generation intelligent displays, wearable devices , and smart sensors . The rational design of electrochemically-modulated optical materials, especially those with multiple regulatory capacities, remains an unmet research challenge. We present here an optical composite, featuring multiple electrochemically-modulated properties, prepared through an electrochemistry-assisted hydrolytic crosslinking reaction between electroactive viologen and fluorescent carbon dots . Upon the electrochemical manipulation of the redox states of the viologen moieties, the resultant composite film exhibits interesting multistage regulated chromism with great color contrast, moderate switching rates, good coloration efficiency, and enhanced cycling stability. We demonstrate a unique sequential multistage regulated electrofluorochromism resulting from the inner filter effect and synergistic interplay between the electroactive viologen units and the fluorescent carbon dots. Furthermore, this optical composite reveals electrogenerated chemiluminescence with acceptable electrochemiluminescence intensity, attributed to the intrinsic behavior of carbon dots.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 11
·2427
·
IF 4.6
Huaqiang He,Youquan Liu,Wei Yang,Siqi Liu,Jie Wang,Zicheng Peng,Shaojun Yuan
To enhance the resistance of stainless steel (SS) against biofouling and biocorrosion, hyperbranched poly(viologen) brushes were covalently immobilized onto SS substrates. This study systematically evaluated the efficacy of the functionalized SS substrates in inhibiting microorganism adhesion, biofouling and biocorrosion. Enhanced antifouling and antimicrobial properties were evidenced through assays involving the attachment of Amphora coffeaeformis , the settlement of Pseudomonas sp. bacteria and barnacle cyprids. Furthermore, the functionalized SS substrates demonstrated superior antifouling performance alongside excellent biocorrosion–inhibition properties. These findings suggest that the functionalized SS substrates, with their robust antimicrobial, antifouling and anticorrosion capabilities, hold significant potential for applications in aquatic environments
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PubMed
高影响因子
DYES AND PIGMENTS
·
2026
·
IF 3.9
Wei Zhao,Weixing Song,Hao Su,Tingting Yang,Xiaolei Song,Yan Wu,Can Luo,Ying Song
Dibenzo[b,d]thiophene and dimethoxybenzene bridges tune viologen charge transport. • DMBBH delivers 72.0% optical contrast and 183.90 cm 2 /C coloration efficiency. • DMBBH retains 61.8% optical contrast after continuous cycling for 10000 s. Organic electrochromic materials have shown considerable potential for applications in smart windows, biosensors, and energy-storage devices owing to their tunable molecular structures, facile preparation, and rich color variation. Conventional viologen compounds are susceptible to over-reduction in their reduced states, which induces irreversible structural changes and limits their application in bifunctional electrochromic-photoluminescent devices. Viologen molecules possess excellent structural designability, and their optical and electrochemical properties can be precisely modulated by modifying substituent structures, counterions, and conjugation lengths, giving them irreplaceable advantages in electrochromic applications. In this study, an aromatic-bridging strategy was adopted, in which dibenzo[b,d]thiophene and dimethoxybenzene units were introduced between pyridine rings to modulate molecular conjugation and charge transport, while hydroxyhexyl side chains were incorporated to improve molecular solubility and intermolecular interactions. The experimental results demonstrate that the successfully prepared 4,4′-(2,5-dimethoxy-1,4-phenylene)bis(1-(6-hydroxyhexyl)pyridin-1-ium) dibromide (DMBBH) exhibits outstanding performance. DMBBH enables a reversible transition from a transparent state to a deep-red state, with an optical contrast of ΔT = 72.0%, a high coloration efficiency of η = 183.90 cm 2 /C, coloration (τ c )/bleaching (τ b ) response times of 9.5 s and 51 s, respectively, and an optical contrast that remains at 61.8% after 10000 s of cycling. This work demonstrates the key role of aromatic bridging structures in stabilizing the excited states of viologen molecules and optimizing charge-transport pathways, providing a new design strategy for future high-performance bifunctional organic optoelectronic devices. DMBBH-based electrochromic devices show reversible transparent-to-deep-red switching, with ΔT = 72.0%, η = 183.90 cm 2 /C, τ c /τ b = 9.5/51 s, and stable operation over 10000 s. Download: Download high-res image (290KB) Download: Download full-size image
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ACS Applied Energy Materials
·
2022
·
IF 6.959
Sisi Wu,Jing Yang,Ning Qin,Yingzhi Li,Haiou Wang,Yong-Wei Zhang,Qing Wang,Zhouguang Lu
LiO2 is a critical intermediate of oxygen reduction reaction in nonaqueous Li–O2 batteries that largely determines the discharge capacity and cycling stability. Currently, functional redox mediators that can promote the solution reaction route by enhancing the solvation of LiO2 have attracted tremendous interest to increase the attainable capacity. Conversely, redox mediators that quench LiO2 and facilitate the surface reaction route receive little attention. Here, we provide an in-depth exploration of the catalytic pathway and effect of a superoxide quencher that modulates the surface growth of Li2O2. Surprisingly, the predomination of the surface reaction route by ethyl viologen helps deliver a capacity as much as that promoted by the solution reaction route. The findings of this work provide a new direction of screening and evaluating functioning redox mediators for Li–O2 batteries.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xuyi Li,Chen Huang,Yu Fan,Zhiang Bai,Bao-Li An,Jiaqiang Xu,Weiwei Zheng,Yue-Ling Bai
A new strategy is developed herein to improve the solid fluorescence of thiazolothiazole viologen by using the ZnCl42– cluster as a scaffold to hinder π-stacking. Importantly, the Cl···H bonds are formed in the solid state to sustain the framework and can be automatically dissociated when dissolved in H2O, thus having no impact on the strong emission in aqueous solution. As such, the first case of organic–inorganic viologen–zinc halide named 4PV·ZnCl4 was designed and synthesized, and a significant increase in photoluminescence quantum yield (ΦF) is realized from 4PV·2Br (ΦF = 0%) to 4PV·ZnCl4 (ΦF = 27.0%) in solid and from 97% to 98% in H2O. 4PV·ZnCl4 also displays pH stimuli-responsive naked-eye chromic behavior and photoluminescence with different coloring states and intensities. The multifunctional performance of 4PV·ZnCl4 provides a prerequisite for carrying different information, expanding their promising application in multilevel information encryption.
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PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Huan Ling,Xiaowen Wu,Ke Li,Fengyu Su,Yanqing Tian,Dan Luo,Yan Jun Liu,Xiao Wei Sun
Electrochromic (EC) devices with reversible transmittance switching have promising prospects in the applications of photoelectric displays. Herein, a novel air-stable and high contrast solution-phase electrochromic device based on new viologen derivative (DPB) with A-D-A structure (A: acceptor; D: donor) was demonstrated. Devices possessed simple configuration of ITO/EC solution/ITO. Ferrocene and polycarbonate (PC) were selected as the complementary material and solvent, respectively. All of the fabrications and performance testing work were conducted in normal air condition. The DPB-based device showed deep magenta color in colored state and exhibited high optical contrast of ΔT of 72.2% (517 nm) and good coloration efficiency of 102.2 cm 2 /C at 1.8 V. The device appeared only slight degradation of ΔT (ΔT = 69.6% or retained 96.7% of its initial ΔT after 5000 s constant switching) under the normal air atmosphere, which was even better than some reported well-packaged viologen-based solution ECDs. Additionally, the UV–vis reflective spectra were also conducted to assess the reflectance property of the devices. The reflectance peak (ΔR = 2.6%) and absorption peak matched accurately, which indicated that the new viologen derivative possesses the potential application in reflective electrochromic devices.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Mu Ding,Lang Chen,Yuwei Xu,Bo Chen,Jie Ding,Rulei Wu,Chao Huang,Yi He,Yongdong Jin,Chuanqin Xia
99 Tc is a β-emitting radionuclide with high fission yield, long half-time and it is urgent to remove Tc from liquid radioactive waste due to its potential toxicity for human. Herein, we presented a viologen-based cationic organic polymer (VBCOP) as a novel adsorbent with cationic sites and functional groups for efficient capture of Re/Tc(VII, IV) from aqueous medium. The results showed that this material could rapidly remove TcO 4 − /ReO 4 − from aqueous solution within 5 min and the maximum sorption capacity for Re(VII) could reach up to 444 mg g −1 , and the distribution coefficient ( K d ) towards Re(VII) and Tc(VII) reached 4.0 × 10 5 and 7.2 × 10 5 mL g −1 , respectively. And more, the adsorption mechanism was also studied by X-ray photoelectron spectroscopy (XPS), Energy dispersive spectrometer (EDS) mapping and Ion chromatography (IC), the results suggested an ion-exchange process in which the Cl − in this material was replaced by ReO 4 − . Additionally, we investigated its adsorption mechanism towards low-valent Re which was prepared by reducing ReO 4 − with NaBH 4 , and the flexible tetraaza macrocycle introduced in the material chelated with Re(IV) was confirmed by X-ray photoelectron spectroscopy (XPS) and Extended X-ray absorption fine structure (EXAFS) analysis. In general, the research exhibits a new sorbent material that can remove both TcO 4 − /ReO 4 − and the low-valent Tc/Re, and provide a new strategy to treat radioactive waste containing Tc with different valences.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fangyuan Sun,Haibo Wu,Chengwei Jiang,Yonghao Chen,Yanan He,Shiqi Zu,Fengyu Su,Yanqing Tian,Yan Jun Liu
Photochromic and electrochromic devices have attracted remarkable attention due to their advantages of low power consumption, eye-friendliness, and broad application potential. However, developing dual-responsive devices with nice memory effect and rapid switching ability remains challenging. Here we report a novel strategy for fabricating dual-responsive photo-electrochromic device (PECD) based on TiO 2 -Prussian blue (PB) composite film and a novel extended viologen FHP . Exploiting the photocatalytic properties of TiO 2 , we successfully fabricated dual-responsive thin films and incorporated FHP as a complementary material to enhance the performance of the device. Notably, the resultant PECD exhibited remarkable performance, including long optical memory (33.91 h), fast response (4.6 s for coloring, 10.4 s for bleaching), high contrast (ΔT is 77.2 % at 692 nm), and excellent cycling stability (ΔT loss is smaller than 3.1 % after continuous working for 1000 cycles), highlighting their potential for advanced optical applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Fangyuan Sun,Haibo Wu,Miao Li,Yiqi Xu,Yuanxin Yan,Yonghao Chen,Yanan He,Shiqi Zu,Xueqing Xu,Hsien-Yi Hsu,Fengyu Su,Yanqing Tian,Yan Jun Liu
Electrochromic (EC) smart windows offer significant potential for building energy efficiency through dynamic solar transmittance regulation. However, current EC technologies face a critical challenge in achieving complete optical blocking. Here, we present a dual-responsive device capable of achieving ultra-low optical transmittance (below 1 % in the range of 400–2500 nm) by integrating a novel EC film with a thermochromic (TC) electrolyte. The EC film, composed of TiO 2 nanoparticles and carefully designed extended viologen derivative with phosphoric moieties (FPB), could enable selective solar blocking through reversible color changes. Furthermore, we synthesized ethylene glycol-containing polymethacrylates as TC copolymers (O x M y ) for cooperative regulation of solar transmittance, which exhibited a wide tunable phase transition temperature range (32–58 °C) to accommodate diverse practical requirements. The resulting device demonstrated four distinct working modes including bleached, colored, opaque, and colored-opaque states. Experiments on house model revealed that the smart window in its colored-opaque state exhibited superior thermal management capabilities, achieving a 5.0 °C reduction in indoor temperature compared to conventional windows. Notably, the device could also function as a battery during operation, generating energy that can be utilized for indoor lighting. In summary, this work provides a promising new approach for developing next-generation smart windows.
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Jiaqi Xu,Zongcai Deng,Bo Wu,Meijin Lin,Dongyang Chen
Organic polymers containing redox-active moieties have attracted increasing attention as electrode materials for high-performance rechargeable batteries due to their sustainability, flexibility, environmentally benign, and high stability. Herein, viologen functionalized fluorene-containing poly(arylene ether ketone)s (MV-FPAEKs) were synthesized by polycondensation , bromination, and quaternization in sequence. 1 H NMR was used to monitor the degree of functionalization (DF), which increased with the increasing of the molar ratio of the bromination agent. The MV-FPAEK-96 with a DF of 96% for viologen was used as the active material for polymer cathode. The theoretical specific capacity was calculated to be 87.6 mAh g −1 based on the dual electron transfer per viologen unit. It had been found that the MV-FPAEK-96 battery delivered a discharge specific capacity of 87.1 mAh g −1 at a current rate of 0.1 C, and maintained 32.1 mAh g −1 after 100 galvanostatic cycles. In contrast, the small molecule of dimethyl viologen was highly soluble in the electrolyte, and the corresponding capacity decreased to negligible values after only 20 cycles. Therefore, the attachment of viologen to polymeric backbones is an effective strategy to increase the stability in electrolyte while maintaining the rechargeability, and the MV-FPAEK-96 is a promising redox-active candidate for polymer batteries.
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