ADVANCED MATERIALS
·
2025
·
IF 26.8
Chunjian Wang,Shuling Xiang,Liang Chen,Lingyan Liang,Jiangping Tu,Shengcheng Shen,Hongtao Cao,Hongliang Zhang
Electrochromic devices (ECDs) offer significant energy-saving potential for applications such as smart windows and displays by modulating optical properties in response to electrical stimuli. However, their widespread adoption is limited by challenges associated with electrolyte stability and the formation of a robust solid-electrolyte interphase (SEI). In this study, a novel quasi-solid polymer electrolyte (QSPE) based on a UV-curable matrix of poly(ethylene glycol) diacrylate (PEGDA) incorporated with poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE), abbreviated as PVTC] is presented. The high dielectric constant of PVTC facilitates lithium-ion transport, while electrochemical cycling triggers partial dehydrofluorination, thereby promoting in situ formation of a LiF-rich SEI layer on WO 3 surface. The optimized electrolyte exhibits excellent properties, including high optical transparency (88.7%), ionic conductivity (1.76 mS cm −1 ), and mechanical robustness. When applied in ECDs, PVTC enables outstanding performance, achieving 86.29% optical retention from the 5000th to the 40 000th cycle and 98.78% charge retention after 50 000 charge–discharge cycles. Furthermore, prototype demonstrations in smart windows and electrochromic sunglasses validate the scalability and flexibility of the proposed system, highlighting a promising strategy for advancing durable, high-performance ECDs through innovative electrolyte design.
研究领域:
材料科学
·
电化学
·
能量存储
·
智能器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 2
·361
·
IF 3.06
Haili Wang,Wenfeng Han,Xiliang Li,Bing Liu,Haodong Tang,Ying Li
Cr2O3nanoparticles were prepared by solution combustion synthesis (SCS) with chromium nitrate as the precursor and glycine as the fuel. Commercial Cr2O3and Cr2O3prepared by a precipitation method were also included for comparison. The morphology, structure, acidity and particle size of fresh and spent Cr2O3catalysts were investigated by techniques such as XRD, SEM, TEM, BET and NH3-TPD. In addition, catalytic performance was evaluated for the dehydrofluorination of 1,1,1,3,3-pentafluoropropane (CF3CH2CHF2, HFC-245fa) to 1,3,3,3-tetra-fluoropropene (CF3CH=CHF, HFO-1234ze). The catalytic reaction rate of Cr2O3prepared by SCS method is as high as 6 mmol/h/g, which is about 1.5 times and 2 times higher than that of precipitated Cr2O3and commercial Cr2O3, respectively. The selectivity to HFO-1234ze for all the catalysts maintains at about 80%. Compared with commercial and precipitated Cr2O3, Cr2O3-SCS prepared by SCS possesses higher specific surface area and acid amount. Furthermore, significant change in the crystal size of Cr2O3prepared by SCS after reaction was not detected, indicating high resistance to sintering.
研究领域:
材料化学
·
催化化学
·
纳米材料科学
·
环境友好化工
·
氟化学
✓ 已验证
DOI
高影响因子
Current Protocols
·
2024
·Vol. 4
·期 1
·e956
·
IF 0
Xuan Chen,Long Xie,Chenglong Zhang,Shen Tian,Zeyu Tang,Ming Xiang,Weiwei Tian,Patrick Lu,Xianbin Yang
The integration of fluorine atoms into biologically active organic compounds has proved to be a vital technique in small molecule drugs. This technique can substantially enhance crucial properties, including metabolic stability, lipophilicity, and bioavailability, often with a mere addition of a single fluorine atom or a trifluoromethyl group. Over the past few decades, this concept has also been applied in nucleic acid chemistry. A commonly employed 2′-OH substitution is the introduction of a 2′-deoxy-2′-fluoro (2′-F) group. The strong electronegativity of fluorine prompts the modified siRNA to readily adopt a C3′- endo conformation, resulting in significant advantages in terms of binding affinity. To enrich the toolbox of chemical modification of oligonucleotides, the replacement of the 2′-OH with the 2′- O -trifluoromethyl group has been developed in RNA analog synthesis. Oligodeoxynucleotides containing the 2′- O -trifluoromethyl group can greatly increase the thermal stability of DNA/RNA duplexes depending on the position and amount of the modification. Moreover, 2′- O -trifluoromethylated oligodeoxynucleotide also exhibited a slightly higher resistance to snake venom phosphodiesterase than the unmodified oligodeoxynucleotide. The 2′- O -trifluoromethylated oligonucleotides can emerge as a label to study RNA structure and function as well, or to develop DNA/RNA-based diagnostics. Hence, it is necessary to report an effective method for the synthesis, deprotection, purification, and characterization of oligonucleotides bearing a 2′ -O -trifluoromethyl group. © 2024 Wiley Periodicals LLC. Basic Protocol 1 : Preparation of 6- N -benzoyl-5′- O -dimethoxytrityl-2′- O -trifluoromethyl adenosine 3′-(2-cyanoethyl N,N -diisopropyl)phosphoramidite Basic Protocol 2 : Preparation of 4- N -acetyl-5′- O -dimethoxytrityl-2′- O -trifluoromethyl cytidine 3′-(2-cyanoethyl N,N -diisopropyl)phosphoramidite Basic Protocol 3 : Preparation of 2- N -isobutyryl-5′- O -dimethoxytrityl-2′- O -trifluoromethyl guanine 3′-(2-cyanoethyl N,N -diisopropyl)phosphoramidite Basic Protocol 4 : Preparation of 5′- O -dimethoxytrityl-2′- O -2-trifluoromethyl uridine 3′-(2-cyanoethyl N,N -diisopropyl) phosphoramidite Basic Protocol 5 : Solid-phase synthesis of 2′- O -trifluoromethylated RNA analogs Basic Protocol 6 : Deprotection and purification of 2′- O -trifluoromethyl-RNAs
研究领域:
生物有机化学
·
核酸化学
·
药物化学
·
RNA生物学
·
分子生物学
·
药学
✓ 已验证
DOI
LANGMUIR
·
2024
·
IF 3.7
Qiuxia Han,Xinyi Jia,Yanmeng Xu,Fei Wang,Qiang Zhang,Yong Chen
Higher biocidability of fluorinated quaternary ammonium salt (QAS) is usually contributed to its preferential segregation to the surface to better contact with and kill bacteria. However, whether its structure also elicits better performance is still unclear. Herein, the same amount of a fluorinated QAS and its nonfluorinated counterpart are both immobilized on the top surface to eliminate the effect of concentration distribution to only study their structure–biocidability relationship. Briefly, the fluorinated and nonfluorinated QASs were synthesized by quaternization of N,N-dimethylethanolamine with 2-(perfluorooctyl)ethyl bromide that was prepared by bromination of 2-(perfluorooctyl)ethanol and 1-bromodecane, respectively. Polystyrene (PS) and diblock copolymer poly(styrene)-b-poly(tert-butyl acrylate) (PS-PtBA) were successively spin coated on SiO2 wafers at different concentrations to form bilayer structures that have a PS base layer and a PtBA top layer. The tert-butyl acrylate groups of the PtBA layer of 0.9 nm were converted to carboxylic acid groups with trifluoroacetic acid for respective esterification with the two hydroxy-containing QASs. It was observed that the fluorinated and nonfluorinated surfaces fabricated at the maximum comparable esterification yield of 63.5% fully eradicated ∼104 CFU of Staphylococcus aureus and Escherichia coli in 120 and 150 min, respectively, indicating that the fluorocarbon chain is more biocidal through better interpenetration into bacterial membranes. Immobilization of a functionality on top surface provides a universal strategy to study its structural contribution to activity without interference of the concentration distribution.
研究领域:
材料科学
·
化学工程
·
生物材料
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Ning Li,Hong Shao,Haina Qi,Yuqi Sheng,Liu Yang,Yunrui Xie,Dan Li,Wensheng Yu,Qianli Ma,Xiangting Dong
A simple and universal technique of the combination of uniaxial electrospinning with subsequent peculiar dual-crucible fluorination technology is innovatively designed and used to construct metallic fluorides yolk-shell nanofibers (YSNFs) and yolk-shell nanobelts (YSNBs) directly for the first time. As a case study, Yb 3+ /Er 3+ co-doped alkaline earth metal fluoride (BaF 2 , SrF 2 and CaF 2 ) as core layer and SiO 2 as shell layer are applied to construct the yolk-shell one-dimensional nanostructures . Under the optimum calcination temperature (600 °C) and time (5 h), the obtained MF 2 :Yb 3+ , Er 3+ /SiO 2 (M=Ba, Sr, Ca) samples are of pure cubic phase, and display the yolk-shell nanofibers and yolk-shell nanobelts with good size uniformity and green up-converting fluorescence. By HF acid treatment of the samples, it is not only proved that the shell layer is SiO 2 , but also independent core-layer MF 2 :Yb 3+ , Er 3+ (M=Ba, Sr, Ca) nanofibers and nanobelts with good size uniformity and excellent up-conversion luminescence are obtained. Especially, only fluorination process among the halogenation can form such exceptive YSNFs and YSNBs one-dimensional nanostructures , and the formation mechanisms of YSNFs and YSNBs are proposed and verified, and further the novel technique is established. The new technique possesses the merits of simple device and easy operation, large output, well-defined morphology and high preparative success rate of yolk-shell nanofiber and yolk-shell nanobelt, universality to metallic fluorides. The design philosophy and the construction technique for the exceptional yolk-shell one-dimensional nanostructures afford a facile approach for the fabrication of other functional metal fluorides yolk-shell one-dimensional nanostructures.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2019
·Vol. 34
·期 4
·545-554
·
IF 1.982
Yong Xu,Linshuang Li,Jianfei Che,Zhifeng Ye
A series of optically transparent and colorless semi-fluorinated poly(ether imide)s (PEIs) (III) were prepared from non-fluorinated 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride (HQDPA) with various trifluoromethyl-substituted diamines. The III series showed more colorless and higher optical transparency with a cutoff absorption wavelength (λ0) below 370 nm than the IV series based on the corresponding non-fluorinated analogues and V series derived from CF3-free pyromellitic dianhydride (PMDA). Compared with the fluorinated VI series based on fluorinated 4,4′-hexafluoroisopropylidenediphthalic anhydride (6FDA), the semi-fluorinated III series not only exhibited much better optical transparency, but also had better mechanical and thermal properties. The III series had a tensile strength of 79.8–109.5 MPa, modulus of elasticity of 3.0–7.7 GPa and elongation at break of 14.2–26.7%, together with glass-transition temperatures (Tg) ranging from 214.3 to 265.1 °C and temperatures of 5% weight loss (T5%) beyond 530 °C. Meanwhile, the novel semi-fluorinated PEI IIIb was optically transparent and colorless with a λ0 of 367 nm coupled with dielectric constants below 3.2 and contact angles against water over 112°. In particular, the optically transparent IIIa exhibited the best tensile strength of 109.5 MPa when compared with already reported counterparts.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 20
·9196-9207
·
IF 2.7
Yaowei Hao,Qiaojun Nie,Xiaocao Cao,Jiafan Zheng,Kai Zhang,Jun Zheng,Haodong Wang,Yafang Zhao,Jiayi Liu,Zhiguang Lin,Ming Zhang,Zhongrong Shen
All-solid-state fluoride-ion batteries (FIBs) with a high theoretical energy density have attracted considerable attention due to their enhanced safety features and superior capacity. The selection of solid electrolyte materials with enhanced fluoride-ion conductivity is crucial for the successful implementation of high fluoride-ion energy storage in realistic scenarios. In this study, heterogeneous solid fluoride-ion electrolytes with different ratios of (LaF3)1−x(PbF2)x are investigated. In contrast to other research efforts focusing on the development of single-phase, single-lattice-defect solid-state electrolytes, the (LaF3)1−x(PbF2)x material incorporates two phases with different defects, namely fluoride vacancies and mobile fluoride ions. This unique combination of defects results in a significant enhancement in conductivity while maintaining their coexistence. The crystal gaps are filled by the orthorhombic phase, which is conductive, resulting in a reduction of the contact resistance due to the uniform distribution of the three crystal phases and the heterointerface between the hexagonal phase and the cubic phase. The multi-component electrolyte (LaF3)0.4(PbF2)0.6 exhibits the best performance among the samples tested. The electrolyte exhibits a high fluoride-ion conductivity, with a value of 2.78 × 10−4 S cm−1 at 120 °C and 6.37 × 10−6 S cm−1 at room temperature. The electronic conductivity is negligible with a value of 5.48 × 10−8 S cm−1. Furthermore, the electrolyte has an electrochemical stability window of 1.85 V vs. Sn/Sn2+. Due to its favorable electrochemical properties, this material has considerable potential as a solid-state fluoride-ion electrolyte.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
无机非金属材料
✓ 已验证
DOI
高影响因子
Small
·
2021
·Vol. 18
·期 5
·2104508
·
IF 13.281
Jinzhu Wang,Jipeng Hao,Chaomin Duan,Xinchao Wang,Kai Wang,Cheng Ma
Solid-state fluoride-ion batteries (FIBs) circumvent multiple formidable bottlenecks of lithium-ion batteries, but their overall performance remains inferior due to the absence of appropriate solid electrolytes. Presently the conductivity of most solid electrolytes for FIBs is too low to enable room-temperature cycling, while the few sufficiently conductive ones only allow for very low discharge voltages because of the narrow electrochemical stability window (ESW). Here, high room-temperature conductivity and a decent ESW are simultaneously achieved by designing a solid electrolyte CsPb 0.9 K 0.1 F 2.9 . Its room-temperature conductivity is 1.23 × 10 −3 S cm −1 , comparable to the most conductive system reported so far (PbSnF 4 , 5.44 × 10 −4 –1.6 × 10 −3 S cm −1 ), but the ESW is several times broader. With these appealing characteristics simultaneously achieved in the solid electrolyte, a cell with much higher voltages than other room-temperature-operable solid-state FIBs in literature is successfully constructed, and stably cycled at 25 °C for 4581 h without considerable capacity fade.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
无机功能材料
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2019
·
IF 4.153
Xin-Rui Yang,He-Jie Lu,Si-Meng Zhang,Jing-Yi Yang,Xi Tang,Chun-Ya Pan,Ling Chen
Monofluorophosphate, being an important industry chemical, such as an additive in toothpaste, has been recently recognized as a new source of excellent deep-ultraviolet nonlinear optical materials with a desired large band gap and birefringence. To move this new material toward real application, an urgent demand is establishing an effective synthetic method owing to the easy loss of fluorine and serious corrosion of fluoride in the conventional methods. In this work, we establish a facile and green aqueous synthesis method overcoming the above-mentioned issues that can be generally applied to a wide range of monofluorophosphates by rational design either through acid–base neutralization or a metathesis reaction. To demonstrate such a method, we synthesized three types of representative monofluorophosphates that are crystallized with alkali metal cations (Na+, K+, Rb+, Cs+; 1–4), mixed cations (Li+NH4+, Na+NH4+, Li+K+, Na+K+; 5–8), and alkaline-earth metal cations (Mg2+, Ca2+, Sr2+, Ba2+; 9–12). Other than low cost and simple manipulation, the yield is pretty high (>80%). Thermal stabilities are also studied, nine of which are for the first time, revealing that [PO3F]2– usually stabilizes to 240–350 °C, whereas [PO3F]2– can stabilize to 650 °C in compounds without NH4+ or crystalline water.
研究领域:
材料科学
·
化学
·
光学材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xiaotian Ma,Shaohua Liu,Xifa Long,Yun Yang
A new mixed alkali metal and rare-earth metal fluoride, Rb 2 Sc 3 F 11 , was successfully synthesized using the high-temperature solution method. It is a rare example containing mixed ScF 7 and ScF 6 groups and crystallizes in the orthorhombic space group Imma (No. 74). Significantly, the optical characterization indicates that Rb 2 Sc 3 F 11 shows a short deep-ultraviolet (DUV) cutoff edge (<200 nm) due to the introduction of the rare-earth scandium and the fluorine with the large electronegativity. It also possesses a moderate birefringence (0.037@532 nm). First-principles calculations were also implemented for a better understanding of the relationship between structure with properties of Rb 2 Sc 3 F 11 .
研究领域:
材料科学
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHESIS-STUTTGART
·
2025
·
IF 2.3
Lulu Qin,Tao Yu,Zhengwei Ding,Min Zhao,Pengfei Li
A highly efficient protocol for the synthesis of trifluoromethyl-substituted cyclopentanes, a structural motif ubiquitous in bioactive compounds and natural products, via boron-radical-catalyzed (3+2) cycloaddition of aroylcyclopropanes and trifluoromethyl-substituted alkenes was developed. Employing readily available precursors, this modular, atom-economical, metal-free, and operationally simple process was compatible with diverse functional groups, giving the products in generally good to high yields. Trifluoromethyl-substituted bicyclo[2.1.1]hexanes (BCHs) were analogously prepared.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
高影响因子
MARINE POLLUTION BULLETIN
·
2025
·
IF 4.9
Lujian Liu,Xia Ruan,Hong Liu,Jun Dong,Xianyuan Fan,Xiaoyong Ning,Yanxin Wang
In this study, nano zero-valent iron (nZVI) was synthesized and used as an activator for monopersulfate (PMS) to remove norfloxacin (NOR) in water. The degradation rate of NOR reached 99 % under the optimum conditions in the pH range of 3.0–9.0. The Fe 0 in nZVI was consumed in the reaction and gradually transformed into γ-FeOOH. Furthermore, the SO 4 − · and OH − · were proved to be the main free radicals involved in NOR degradation by nZVI-PMS, and SO 4 − · was the dominant free radical. A possible degradation pathway for NOR was examined via time-of-flight mass spectrometry analysis. NOR was degraded through defluorination, decarboxylation and cleavage of the piperazine ring. The intermediates were oxidized and decomposed into CO 2 , H 2 O, F − and other small organic products. Some NOR and its degradation products were adsorbed by nZVI and γ-FeOOH. This investigation could provide useful guidance for future research on NOR degradation via PMS-based advanced oxidation processes.
研究领域:
环境科学
·
化学工程
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）