APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Bing Zhang,Shan Wang,Chuntian Qiu,Yangsen Xu,Jiandong Zuo
Porous carbon nitride photocatalysts with sufficient cyanide groups were facile fabricated through simple calcination process with cheap salt as porogen. The introduction of cyanide groups can enhance charge separation efficiency and reductive activities of photogenerated electrons of carbon nitride. The optimized CN-S catalysts can selectively oxidize alcohols to aldehydes with broad scope as well as reduce oxygen to H 2 O 2 . The tandem strategy can photocatalytic produce H 2 O 2 with a rate of more than 200 μmol h −1 g −1 which is nearly 19 times than that without alcohols and fulfilled utilization of both photo-generated electrons and holes.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2018
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IF 1.686
Xiang Huang,Zheng Zhou,Guang-Xin Chen,Qifang Li
A strong polar cyano group was introduced to increase the interfacial polarization between filler and matrix, thereby improving the dielectric properties of polymer composites. 3-Cyanomethyl-1-vinyl imidazolium bromide (CMVImBr) ionic liquid was first synthesized, copolymerized with divinylbenzene on the surface of carbon nanotubes (CNTs) to form a core–shell structured hybrid, and then compounded with epoxy to prepare a filler-well-dispersed composite with high dielectric constant . The dielectric constant of the composites reached 139 at 1 kHz when the filler content was 20%, and the dielectric loss was only 0.088. The cyano groups and ionic bonds from CMVImBr played a significant role in increasing the dielectric constant owing to interfacial polarization. Moreover, the crosslinked polymer shells decreased the dielectric loss and served as electrical barriers between CNTs , which are desirable properties for electronic devices.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Shahid Hussain,Haifeng Dong,Shaojuan Zeng,Muhammad Umair Ahmad,Farooq Khurum Shehzad,Hui Wu,Yanqiang Zhang
Ionic liquids, which are designable and nonvolatile, have become a hot topic in the field of CO 2 separation from industrial gases. In order to utilize the nonvolatile and low heat capacity of ionic liquids, it is necessary to solve the problem of high viscosity of pure ionic liquids. In the present study, ether functionalized pyridinium ion [E 1 Py] + with good biodegradability and low viscosity was selected as cation. Ions containing cyano groups were used as anions, such as thiocyanate ion [SCN] - , dicyanamide ion [N(CN) 2 ] - , tricyanomethanide ion [C(CN) 3 ] - . Three ionic liquids with low viscosity were synthesized and characterized by 1 HNMR, 13 CNMR and FTIR. The physiochemical properties of ionic liquids such thermal decomposition temperature, density and viscosity were tested. The CO 2 absorption capacity was systematically studied by using intelligent gravimetric analyzer at the pressure range between 0 and 15 bars and the temperature range from 303.15 to 333.15 K. The results showed that the order of CO 2 absorption capacity of these three ionic liquids is [E 1 Py][C(CN) 3 ] > [E 1 Py] [N(CN) 2 ] > [E 1 Py][SCN], which showed that the solubility increased by increasing more cyano groups in ionic liquids. Thermodynamic properties such as enthalpy, entropy, and Gibbs free energy were also calculated for CO 2 absorption.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
CARBON
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2021
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IF 9.594
Xiang Gao,Wei Liu,Tianqi Wang,Jingrou Dai,Yuanyuan Pan,Yongxu Du,Yongpeng Cui,Hongguang Fan,Shuang Liu,Yongcheng Jin
N-doping can endow carbon materials with high electrochemical activity. Besides the widely validated sp 2 -hybridized nitrogen doping, sp -hybridized nitrogen ( sp - N ) atoms are also expected to be new active sites. However, both sp - N atoms and cyano (CN) groups containing sp - N are rarely produced in carbon materials presently. In this work, the first cyano groups-modified carbon materials are synthesized firstly via an interesting struggle between the chemical etching of KOH and the catalytic graphitization of Co nanoparticles in carbon frameworks. The theoretical calculations and experimental results manifest that the stronger electronegativity of CN groups renders carbon materials a higher electrochemical activity. As K + storage anodes, the CN − modified carbon materials exhibit an obvious boost in potassium storage performance in both ester- and ether-based electrolytes. Therefore, as a new N doping form, the successful introduction of CN groups into carbon materials opens a door for exploring sp -N doped carbon materials for applications in energy storage and other fields.
研究领域:
材料科学
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能源存储
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganics
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2023
·Vol. 11
·期 8
·323
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IF 2.9
Huichao Zhang,Jinpeng Xin,Huaimin Jin,Wenhao Xiang,Muqing Chen,Yang-Rong Yao,Shangfeng Yang
Metal cyanide clusterfullerenes (CYCFs) are formed via the encapsulation of a single metal atom and a cyanide unit inside fullerene cages, endowing them with excellent properties in various applications. In this work, we report the synthesis, isolation, and characterizations of the first cases of thulium (Tm)-based CYCFs with the popular C82carbon cages. The structural elucidation of the two TmCN@C82isomers was achieved via diverse analytical techniques, including mass spectrometry, Vis-NIR spectroscopy, single-crystal X-ray crystallography, and cyclic voltammetry. The crystallographic analyses unambiguously confirmed the molecular structures of the two TmCN@C82isomers as TmCN@Cs(6)-C82and TmCN@C2v(9)-C82. Both TmCN clusters adopt a well-established triangular configuration, with the Tm ion located on the symmetrical plane of the carbon cages. The electronic structures of both TmCN@C82isomers adopt a Tm3+(CN)−@(C82)2−configuration, exhibiting characteristic spectral and electrochemical properties reminiscent of divalent endohedral metallofullerenes (EMFs). Intriguingly, unlike the divalent Tm2+ion observed in the mono-metallofullerenes Tm@C2n, a higher oxidation state of Tm3+is identified in the monometallic TmCN cluster due to bonding with the cyanide anion. This result provides valuable insight into the essential role of the non-metallic endo-units in governing the oxidation state of the metal ion and the electronic behaviors of EMFs.Keywords:endohedral metallofullerenes;cyanide clusterfullerenes;thulium;X-ray crystallography
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Guo-Cheng Han,Xiaorui Su,Jiating Hou,Annaleizle Ferranco,Xiao-Zhen Feng,Ruosheng Zeng,Zhencheng Chen,Heinz-Bernhard Kraatz
The abnormal content of hemoglobin in human body can lead to several diseases such as anemia, thalassemia, leukemia, heart disease. Therefore, it is very important for sensitive detection of hemoglobin in clinical analysis. An electrochemical approach is presented for detecting hemoglobin using disposable electrochemical sensors, which were based on the ability of the redox active ferrocene group of Fc[CO-Cys(Trt)-OMe] 2 and Fc[CO-Glu-Cys-Gly-OH]. The two electroactive materials were adsorbed onto gold nanoparticles that were previously electrochemically deposited onto screen-printed electrodes. The as-prepared sensors were characterized by scanning electron microscopy and energy dispersive spectroscopy, and their electrochemical properties were characterized by cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy. Results indicated the Fc[CO-Glu-Cys-Gly-OH] prepared sensor showed enhanced current responses for hemoglobin catalysis than the Fc[CO-Cys(Trt)-OMe] 2 prepared sensor. Optimal operating conditions were determined for hemoglobin detection by differential pulse voltammetry. The concentration of hemoglobin showed a good linear relationship with the current difference in the range of 0.1–1000 μg/mL and with 0.03 μg/mL limit of detection. The development of this electrochemical sensor was used for hemoglobin detection in human serum with a R.S.D. lower than 4.7% and recovery between 95.5% and 103.2%, which was in agreement with the data obtained from typical clinical analysis.
研究领域:
生物医学工程
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分析化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Kunqiao Li,Yanqiu Jiang,Yudong Li,Zhe Wang,Xing Liu,Ping Wang,Debin Xia,Ruiqing Fan,Kaifeng Lin,Yulin Yang
Cyano groups have been successfully introduced on the backbone edge of g-C 3 N 4 to fabricate nitrogen defects under mild conditions, which are derived from incomplete polymerization of g-C 3 N 4 after BaCO 3 utilization. Characterization results indicate that the interfacial interaction between BaCO 3 and carbon nitride is playing a significant role for introducing cyano groups into g-C 3 N 4 . Cyano groups working as electron capture centers are proved to change the band gap of carbon nitride , reducing the recombination rate of electron-hole pairs and promoting charge separation. As expected, the hydrogen evolution rate of nitrogen-defect-modified carbon nitride is improved to 71.57 μmol h −1 , which is 13.5 times that of pristine C 3 N 4 . Meanwhile, the degradation efficiency of methyl orange is promoted (5 times that of pristine C 3 N 4 ). This work is the first report on the fabrication of cyano-group-modified carbon nitride with BaCO 3 utilization, and opens a new door for further exploring environmental-friendly carbon nitrides on energy conversion.
研究领域:
材料科学
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环境科学
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能源化学
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DOI
高影响因子
Polymer Chemistry
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2015
·Vol. 6
·期 19
·3685-3693
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IF 5.52
Yao Li,He Wang,Chunyu Zhang,Yingchao Zhang,Zhanchen Cui,Donghang Yan,Zuosen Shi
This study describes a general approach to design and synthesize a series of novel high-k polymers containing π-conjugated structures with cyano groups for use as a dielectric layer in organic thin-film transistors (OTFTs). The polymer dielectric films have been evaluated based on surface morphology, dielectric constant, leakage current density and compatibility with organic semiconductors, which can be readily fabricated via solution processes in an ambient atmosphere. The characterization confirms that the π-conjugated structures with cyano groups can provide a high dielectric constant (high-k) and a low electrostatic loss. With these polymer dielectric layers, para-sexiphenyl (p-6P)/vanadyl-phthalocyanine (VOPc) OTFTs exhibit excellent performances with a threshold voltage of −3.22 V, a charge carrier mobility of 0.49 cm2 V−1 s−1, and an on/off current ratio >106.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
Energy Storage Materials
·
2023
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IF 20.4
Yong Wu,Yifan Wang,Facai Wei,Tingting Zhang,Wenda Li,Lingyan Huang,Ruijuan Qi,Jianwei Fu,Chengbin Jing,Jiangong Cheng,Shaohua Liu
Bottom-up molecular engineering by rational design has emerged as a promising strategy for exploring advanced organic cathodes. However, directly programming organic moieties into high-performance electro-active materials remains a great challenge. Herein, we design and synthesize a hydrogen-bonded supramolecule (hexaazatrinaphthalene hexacarbonitrile, HATN-6CN) anchored with abundant cyano groups, which ensures structural stability, extended π-conjugated system, and multiple redox active centers. As a result, the HATN-6CN cathode delivers a high specific capacity (297.6 mAh g –1 at 0.5 A g –1 , 225.2 mAh g –1 at 5 A g –1 ) and outstanding long-term cycling performance (191.9 mAh g –1 over 1000 cycles at 5 A g –1 with a capacity retention of 85.2 %). Moreover, the charge storage mechanisms, structural evolution, and reversibility during the redox process of HATN-6CN were systematically investigated. This work offers a feasible and promising avenue for bottom-up molecular engineering of organic electrodes by rational design.
研究领域:
材料科学
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化学工程
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2019
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IF 2.961
Pengfei Chen,Huichao Zhu,Lin Kong,Yupeng Tian,Jiaxiang Yang
Two novel carbazole derivatives containing tetraphenylethylene and cyano groups have been synthesized and characterized. The only difference between TPECZ and TPECZBr is at the C-8 and C-1 positions with or without a Br atom. Interestingly, they exhibited similar photophysical properties in solution, while their quantum yields and molecular packing models in solid state were significantly different. It was confirmed by single crystal structure analysis that the presence of a Br atom changed the molecular packing. Meanwhile, the two compounds exhibit mechanochromism (MC) behaviors, that the fluorescence emissions can be changed between yellow and orange. The powder X-ray diffraction (PXRD) and differential scanning calorimetry (DSC) suggested that the MC mechanism of TPECZ and TPECZBr can be correlated with a phase transition between crystalline and amorphous states.
研究领域:
材料化学
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光物理化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）