LANGMUIR
·
2025
·
IF 3.9
Zhixiang Yan,Huiting Yang,Shuo Zheng,Zhiyong Tan
High-performance dielectric materials have gained widespread attention, due to their great potential for various applications, such as flexible electronics and capacitive sensors. In this study, sulfamide (SA) and sulfanilamide (SAN), containing sulfonyl groups, were introduced into polyurethane (PU) as chain extenders. The polyurethane with the best performance was end-capped with 3-methylsulfonyl-1-propanol (3-MSP) to investigate the effects of the SAN/SA molar ratio and the capping agent on the microstructure, dielectric properties, and mechanical performance of the PU. The experimental results indicated that, at a frequency of 102 Hz, the polyurethane material with an SAN/SA molar ratio of 2:1 (sample PU-N2S1) exhibited the highest dielectric constant (15.65), representing a 144% increase, compared to sample PU-N0S0. Meanwhile, sample PU-N2S1 showed the highest degree of microphase separation. At a frequency of 1.26 × 105 Hz, its dielectric loss was 0.055. Notably, 3-MSP had a relatively large dipole moment (μ = 6.93 D). However, its incorporation into polyurethane significantly reduced the dielectric constant. The results demonstrated that the dielectric constant and dielectric loss of polyurethane were not only dependent on its dipole moment but were also closely related to its microstructure, including microphase separation and intermolecular interaction.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Chengwen Gu,Jiahui Li,Yi Zhao,Cijian Zhang,Qianqian Fan,Qian Liu,Shouhai Zhang,Yunhe Zhang,Xigao Jian,Zhihuan Weng
High-temperature poly(aryl ether ketone) dielectrics have attracted application prospects in the field of polymer film capacitors. However, the investigations on improving the capacitive properties of poly(aryl ether ketone) based on molecular structure design strategies were absent. Herein, a series of poly(aryl ether ketone) bearing phthalazinone moiety were synthesized, and the effect of chemical structures on the capacitive properties of the resultant polymers was investigated by experimental data and density functional theory calculation. The introduction of the sulfone group could not only improve the permittivity but also construct deep carrier traps to enhance the breakdown strength , leading to high discharge energy density ( U e ) value of the poly(phthalazinone ether sulfone ketone) (PPESK). For the poly(phthalazinone ether nitrile ketone) (PPENK), the introduction of the nitrile group could improve the U e at room temperature, but reduce the value at elevated temperatures. As a result, at room temperature, the maximum U e of both the PPESK (4.56 J/cm 3 ) and the PPENK (3.40 J/cm 3 ) was higher than that of the PPEK (3.02 J/cm 3 ). Notably, the maximum U e of the PPESK reached 3.07 J/cm 3 at 150 °C, which is twice that of commercially bi-oriented polypropylene (BOPP) film (1.5 J/cm 3 at 70 °C). Additionally, at the electric field of 200 MV/m and 150 °C, the PPESK films exhibited the U e of 0.72 J/cm 3 with charge-discharge efficiency ( η ) of 97.2 %, which was obviously superior to those of the BOPP ( U e = 0.4 J/cm 3 with η of 96 % at 70 °C). This study presents an in-depth analysis regarding the relationship between the sulfone and nitrile groups and the capacitive performance of poly(aryl ether ketone) bearing phthalazinone moiety, which is informative for designing high-temperature dielectric polymers.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY
·
2016
·
IF 0.634
Xirui Lv,Yue Zhou,Anguo Zhang,Lihong Zhou,Qingle Zeng
A straightforward and environment-friendly protocol for the synthesis of valuable chiral N-(tert-butylsulfinyl)imines has been developed. Different from traditional process with benzaldehydes as substrates, arylmethyl alcohols, benzylthiol, dibenzyl ether, thioether, and disulfide are used as alternative substrates to react with tert-butanesulfinamide in the presence of KOtBu under air for the synthesis of chiral N-(tert-butylsulfinyl)imines. This is a transition metal-free, mild, cost-effective, and simple process.
研究领域:
有机化学
·
环境化学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2014
·
IF 2.129
Jingyu Piao,Jia Lv,Xin Zhou,Tong Zhao,Xue Wu
A novel fluorescent chemosensor bearing a rhodamine and a dansyl moiety was developed for highly selective detection of Fe 3+ based on fluorescence resonance energy transfer (FRET) mechanism. Binding of Fe 3+ to the chemosensor induced spirolactam ring opening in the rhodamine moiety and subsequent off–on FRET from the dansyl energy donor to the rhodamine energy acceptor due to the spectral overlap between the emission of the dansyl moiety and the absorption of the ring opened rhodamine moiety. Job’s plot analysis indicated a 1:1 binding stoichiometry between the chemosensor and Fe 3+ . The association constant was estimated to be 2.72 × 10 3 M −1 according to the Benesi–Hildebrand method. With the feature of easy synthesis, simple structural skeleton and excellent sensing ability, the newly synthesized chemosensor provided the potential for applying as a highly selective fluorescent probe in complex samples containing various competitive metal ions and developing other metal ion chemosensors to fulfill various needs of biological and environmental field.
研究领域:
分析化学
·
生物化学
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2019
·Vol. 10
·期 45
·6166-6173
·
IF 4.76
Mengdong Guo,Yue Huang,Jinfeng Cao,Guibao Sun,Xia Zhao,Jie Zhang,Shengyu Feng
Environmental pollution and the dependence on finite resources are intensifying the search for new chemically recyclable polymers. Herein, we report the synthesis and properties of recyclable sulfone-containing polysiloxanes via the anionic ring-opening polymerization (ROP) of a new macroheterocyclic siloxane monomer (P1OX). The resulted polymer with a molecular weight up to 49 kg mol−1 shows good thermal stability and chemical recyclability. Compared to previous recyclable polymers, the recyclable polysiloxanes have simpler synthetic methods without expensive catalysts, milder conditions of depolymerization (using available and cheap KHSO4 at ambient temperature) and high selectivity of depolymerization (92%) back to P1OX. The sulfone-containing polysiloxanes were a brownish rigid plastic with a storage modulus E′ of 203 MPa at room temperature. From these recycled polymers, smooth polysiloxane nanofibers were prepared successfully via electrospinning. These results conclusively indicated that the new family of sulfone-containing polysiloxanes largely extended the scope of application of silicone and sustainable materials.
研究领域:
材料科学
·
化学工程
·
可持续发展
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Bin Wu,Shuguang Shen,Xingting Guo,Ruxue Sun,Yongmei Liu,Jing Li,Jiemin Guo,Shuai Wang,Xiaoting Hu,Yutong Guo
To clarify the role of the specific sulfur-containing functional groups of solid acids in the hydrolysis of cellulose, it is necessary to prepare a solid acid bearing relatively single sulfur-containing functional groups apart from the –SO 3 H group. However, diphenylsulfone cannot be polymerized through Friedel-Crafts alkylation, limiting the possibility of preparing sulfone-based solid acids. Therefore, diphenyl sulfide was crosslinked through Friedel-Crafts alkylation, followed by sulfonation and oxidation. The results showed that the sulfone group was successfully introduced onto the solid acid, and the density of –SO 3 H groups increased by 80.88 % through this strategy. The sulfone group is a strong adsorption site for cellulose, and its introduction leads to a decrease in apparent activation energy. Cellulose conversion and glucose selectivity are as high as 77.54 % and 97.13 %, respectively. Unexpectedly, the stability of the functional groups and carbon skeleton is significantly improved due to the conjugation effect of the sulfone group.
研究领域:
化学工程
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 4
·1579-1588
·
IF 2.817
Liu Zuyan,Yao Linxin,Hu Jiqing,Qiu Zhiming,Yan Yurong
A kind of fluorinated polyimide carrying sulfonyl groups (SFPI) as a novel binder is synthesized, which possesses excellent thermal stability, solubility, and mechanical properties. The cells with SFPI binder exhibit lower impedance and polarization compared with the cells adding the conventional PVDF binder. The electrochemical test results showed that the SFPI binder–based LiFePO 4 (LFP) electrode exhibits 134.1 mAh g −1 after 100 cycles and about 94.1% of the capacity is maintained. Especially, the overcharge safety of lithium-ion batteries during overcharge state is significantly improved by incorporating a SFPI binder.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Jianhua Zhu,Jifu Zheng,Chunli Liu,Suobo Zhang
Ionic complexing induced phase inversion in an aqueous polyacrylic acid (PAA) coagulation bath was studied for fabricating highly permeable and selective nanofiltration (NF) membranes. To obtain membranes using classical liquid-liquid phase inversion, poly (arylene ether sulfone) with tertiary amine groups (PES-TA)/N, N-dimethylformamide/tetrahydrofuran was used as the polymer dope solution. The polycationic character of PES-TA allows ionic complexation with the carboxylic acid groups of PAA. The complexing reaction at the interface of the two liquids was shown to affect the rate of phase inversion, the morphology of membranes in the phase inversion process, and enhance membrane performance. At optimized conditions, the pure water flux of the PES-TA-PAA NF membrane was 26.1 L m −2 h −1 , 2.6 times greater than unmodified PES-TA membrane (10.7 L m –2 h –1 ). The rejection of salts and dyes of PES-TA-PAA membrane improved compared with PES-TA membrane and the rejection to MgCl 2 , MgSO 4 and Na 2 SO 4 were measured above 93%. The PES-TA-PAA NF membrane was shown to have stable performance in the pH range from 1 to 9 and maintain stable NF performance 100 h of filtration.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Yang Li,Mingwei Zhang,Jian Tao,Linping Zhao,Zhaohui Li,Ran Yang,Lingbo Qu
Rhodamine derivatives possessing spiroring-closing structures exhibit colorlessness, while the induction of spiroring-opening by metal ions results in notable color changes, rendering them as ideal platform for the development of functional probes with broad applications. However, the spiroring-closing form of rhodamine-based probes exhibits limited water solubility due to its neutral character, necessitating the incorporation of organic solvents to enhance solubility, which may adversely affect the natural system. Designing rhodamine probes with high solubility in both the zwitterionic and neutral form is of utmost importance and presents a significant challenge. This study presents a sulfone-rhodamine-based probe that exhibits good water solubility both in the spiroring opening and closing for detecting Hg 2+ . Upon the presence of Hg 2+ , the color undergoes a noticeable change from colorless to pink, with a response time of less than 1 min. probe 1 demonstrates an excellent linear relationship with Hg 2+ concentrations within the range of 0–8 μM, and achieves a detection limit is 17.26 nM. The effectiveness of probe 1 was confirmed through the analysis of mercury ions in cosmetic products. Utilizing this probe, test paper strips have been developed to enhance the portability of Hg 2+ detection naked eyes.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2023
·
IF 6.1
Yanfei Jia,Bing Han,Xiao-Ting Liu,Yuhao Liu,Yuanqiang Sun,Chao Lu
Water in organic solvents is a prevalent impurity that significantly influences chemical reactions and industrial processes. Carbon dots (CDs) gained attention as promising tools for chemosensing due to their advantageous characteristics, including easy synthesis, cost-effectiveness, and excellent adjustability and stability. However, limited solubility in water and turn off fluorescence response mode hinder the practical utilization of CDs for water sensing. To tackle such dilemma, a highly water-soluble CDs with distinctive hydrogen-bond-induced emission (HBIE) was rationally designed through introducing sulfone group into the widely employed p -phenylenediamine precursor. The inclusion of sulfone group imparts the CDs with notable water solubility, as well as distinctive ratiometric fluorescent response towards water content, exhibiting high sensitivity and selectivity. Upon exposure to water, the emission color of CDs undergoes a real-time transition from blue to yellow-green, which can be readily discerned by naked eyes. The CDs have been successfully applied in detecting water in commercially available alcohol. This study presents a straightforward yet efficacious approach for rationally design of CDs with unique HBIE characteristics and ratiometric fluorescent response, offering great potential for practical chemosensing applications.
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Jie Shi,Yuting Xiong,Junyan Li,Baolei Gao,Guangyan Qing,Qianying Sheng,Minbo Lan
Protein methylation has attracted increasing attention due to its significant regulatory roles in various biological processes. However, the diversity of methylation forms, subtle differences between methylated and nonmodified sites, and their ultralow abundances pose substantial challenges for capturing and isolating methylated peptides from biological samples. Herein, we develop a chromatographic method that utilizes 4-sulfonylcalix[4]arene (SC4A) as a mobile phase additive and Click-Maltose as the stationary phase to separate methylated/nonmethylated peptides through the adsorption of the SC4A-K(Me3) complex. By utilization of the interaction between calix[4]arene cavities and trimethylated lysine residues, methylated peptides could be specifically separated from peptide samples. This method significantly improves the signal-to-noise ratio (S/N), even in samples containing a 10-fold excess of bovine serum albumin (BSA) trypsin digests. Additionally, we successfully enriched 12 methylated peptides from histone digests. This study paves the way for the selective enrichment of lysine methylated peptides in post-translational modification proteomics (PTMs), enhancing both the capture efficiency and selectivity of methylated peptides and providing robust technical support for subsequent proteomics research.
研究领域:
蛋白质组学
·
生物化学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yujie Liang,Jiazhu Xu,Wenjie Sun,Tianyu Li,Changyi Dong,Yi Zhou,Hong Zheng,Yonghong Cheng,Lei Zhang
Polymer based dielectric film capacitors with enhanced energy density and high temperature resistance are urgently required to replace the general used biaxially oriented polypropylene (BOPP) dielectric counterparts in power grid and electrical vehicles. This study reports the development of sulfonated flexible epoxy polymers, which demonstrate excellent properties including high dielectric constant (4.9–6.0), low dielectric loss, high charge–discharge efficiency and desirable thermal stability. The obtained epoxy film achieves an impressive efficiency of 91.5 %, accompanied by discharge energy density up to 8.78 J/cm 3 at 550MV/m at room temperature, nearly twice that of BOPP. While the prepared film still possesses discharge energy density of 1.01 J/cm 3 at 200MV/m, even when exposed to temperatures up to 150 °C, which is nearly twice that of PEI under same conditions. Simulation results reveal that sulfonyl groups can effectively improve dielectric performance without sacrificing heat resistance of epoxy polymers. The influence of sulfonated groups and positions are figured out by constructing epoxy film with pendant and bridging sulfonyl groups. It is concluded that the enhanced dipole moments caused by pendant sulfonyl group is preferred in improving energy density, while the increased rotational energy barrier attributed to bridging sulfonyl group is critical to the enhancement of temperature tolerance. The manipulation of sulfonation in polymer dielectrics’ design introduces a deep perspective for advancing high energy storage films.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）