INTEGRATED FERROELECTRICS
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2016
·
IF 0.375
Dong-Wei Han,Xiu-Lan Zhang,Bing Yu,Hai-Lin Cong,Chun-Bo Mu,Hua Yuan
Three kinds of carboxyfullerenes, La@C82-COOH, C60-COOH and C70-COOH, were used to modify gold electrodes. The electrochemical behavior of dopamine (DA) at the carboxyfullerenes modified electrodes was studied using the cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The C70-COOH modified electrodes performed the best among them. Under the optimal conditions, linear CV and DPV responses to DA concentration from 1 μmol/L to 13 μmol/L were observed, and the detection limit of DA was 1×10−2 μmol/L in the presence of 10 μmol/L uric acid (UA). The practical analytical utilities of the C70-COOH modified electrodes were demonstrated by the determination of DA HCl in the real samples of dopamine hydrochloride injection (DHI). Moreover, the modified electrodes exhibited good reproducibility and sensitivity, demonstrating its feasibility for analytical purpose.
研究领域:
分析化学
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神经科学
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药物分析
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
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2012
·Vol. 22
·期 34
·17833-17841
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IF 5.968
Cheng-Xiong Yang,Xiu-Ping Yan
The adsorption and extraction of fullerenes on the metal–organic framework MIL-101(Cr) were studied in detail in terms of kinetics, thermodynamics, adsorption isotherms, competitive adsorption, and breakthrough curves. The adsorption of C60 and C70 on MIL-101(Cr) follows a pseudo-second-order kinetic model. The adsorption rate constant for C70 is 3 to 5 times that for C60, showing faster and easier adsorption of C70 over C60 on MIL-101(Cr). Intraparticle diffusion model analysis reveals that the adsorption of C60 and C70 on MIL-101(Cr) proceeds by two phases, surface sorption and intraparticle/pore diffusion. The adsorption of fullerenes on MIL-101(Cr) is controlled by entropy changes. The maximum adsorption capacity for C70 at 30 °C (198.4 mg g−1) is 29 times that for C60 (6.76 mg g−1). MIL-101(Cr) shows much more favorable adsorption of C70 and higher fullerenes than C60 with a high selectivity (αC70/C60 = 24). Selective extraction of C70 and higher fullerenes from crude carbon soot can be easily achieved on MIL-101(Cr) via a simple adsorption–desorption process. The used MIL-101(Cr) can be regenerated by washing with o-dichlorobenzene under ultrasonication. The high selectivity, fast adsorption, easy desorption, and excellent reusability makes MIL-101(Cr) attractive as a novel adsorbent for the enrichment and extraction of C70 and higher fullerenes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
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2018
·Vol. 16
·期 31
·5598-5608
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IF 3.423
Yaxiong Wei,Min Zheng,Qiaohui Zhou,Xiaoguo Zhou,Shilin Liu
A bodipy–C70 dyad was synthesized and applied in triplet–triplet annihilation (TTA) upconversion of perylene as a novel metal-free organic photosensitizer. The photophysical processes were investigated by the methods of steady-state UV-Vis absorption and fluorescence spectroscopy, nanosecond time-resolved transient absorption spectroscopy, cyclic voltammetry, and density functional theory calculations. The bodipy–C70 dyad showed an increased molar extinction coefficient up to 82 300 mol−1 cm−1 at 518 nm compared with the C70 monomer. With photo-excitation of the bodipy moiety at 532 nm, the intramolecular singlet–singlet energy transfer between bodipy and C70 units was efficient with a quantum yield of nearly 100%, and the lowest triplet state of the dyad was subsequently populated via ISC of the C70 moiety, with a lifetime of ca. 80 μs in toluene. Electrochemical investigation suggested that the intramolecular electron transfer of the excited dyad was thermodynamically prohibited in toluene due to the positive ΔGCS for charge-separation. With the presence of perylene in solution as the triplet energy acceptor and emitter, the TTA upconverted fluorescence was observed with a maximum quantum yield of 10.3%. The overall upconversion capability of 4417 M−1 cm−1 exceeded that of C70 approximately two-fold. Moreover, the bodipy–C70 dyad also exhibited an enhanced optical stability under intense irradiation. All data indicated that the dyad was another ideal photosensitizer for TTA upconversion of perylene in the fullerene derivative family.
研究领域:
材料科学
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光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2014
·Vol. 16
·期 16
·3284-3288
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IF 3.858
Dedi Liu,Wen Cui,Naisen Yu,Ran Liu,Dongping Liu,Yongbin Xu,Chunshan Quan,Bo Liu,Quanjun Li,Bingbing Liu
Trichlorobenzene isomers with different molecular structures (1,2,3-, 1,2,4- and 1,3,5-trichlorobenzene) were used as shape and luminescence tuners of C70 nano/microcrystals. C70 nano/microcrystals with different morphologies (nano/microrods, nano/microsheet clusters and nano/microballs) were synthesized. C70 nano/microballs fabricated using 1,3,5-trichlorobenzene have a simple cubic (sc) structure, and C70 nano/microcrystals obtained using other solvents have a face-centered-cubic (fcc) structure. Meanwhile, the introduction of different trichlorobenzenes in the C70 nano/microcrystals enhanced their PL intensities to different degrees. In particular, the PL intensities of the C70 nano/microcrystals doped with 1,3,5-trichlorobenzene were most highly enhanced, which is one order of magnitude higher than that for the pristine bulk C70 crystals.
研究领域:
材料科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2015
·Vol. 8
·期 4
·919-924
·
IF 1.821
Bing Yu,Hailin Cong,Lei Xue,Chao Tian,Xiaodan Xu,Qiaohong Peng,Shujing Yang
Monodisperse silica microspheres with average diameters from 1 μm to 2 μm were synthesized by a modified Stöber method, in which an ethanolic solution of tetraethyl orthosilicate (TEOS) was continuously supplied to the reaction mixture containing KCl electrolyte, water, ethanol and ammonia. The effects of reactant amounts, supply rate, and reaction temperature on the microsphere morphology were investigated. After surface modification with octadecyl trichlorosilane, the obtained monodisperse C18-silica microspheres with an average diameter of 1.5 μm were applied to ultra performance liquid chromatography (UPLC) separation of fullerenes. Because of having a smaller size, the 1.5 μm monodisperse C18-silica UPLC stationary phase shows ultra high efficiency compared with the commercial C18-silica HPLC stationary phase with average diameters from 5 to 50 μm.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2015
·
IF 2.587
Bo Jin,Juan Shen,Rufang Peng,Congdi Chen,Qingchun Zhang,Xiaoyan Wang,Shijin Chu
Dimethyl sulfoxide (DMSO) with sodium carbonate (Na2CO3) is an effective catalyst system for C60 cyclopropanation through the Bingel reaction. Various bromomalonic esters, brominated β-keto esters, brominated 1,3-diketones, and other bromo-substituted active methylene compounds can react with C60 in the presence of DMSO and Na2CO3 to achieve excellent yields of the corresponding methanofullerenes at 10 °C. Moreover, this proposed methodology has been also employed successfully to functionalize [70]fullerene, single-walled carbon nanotubes (SWNTs), and graphene. This protocol is beneficial because it involves short reaction time, high yield, and a simple procedure. Additionally, this method does not need a strong base, such as sodium hydride and 1,8-diazabicyclo[5,4,0]undec-7-ene, because inexpensive Na2CO3 can be the catalyst.
研究领域:
有机化学
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纳米材料化学
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碳材料科学
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功能化修饰
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催化化学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Jinyu Wu,Shaolong Han,Sichen Li,Rui Zhu,Shuaibo Shi,Shishen Zhang,Kun Zhang
Till now, there is still a lack of the convenient and efficient approach to implement identification and quantitation of fullerenes in various domains. This work provides the first example for detecting fullerenes by an adequate fluorescent probe, in parallel with the new methodology for detecting fullerenes by the fluorescent chemosensing approach. Using a multi-emission lanthanide-disalicylaldehyde coordination hybrid H 2 Q j2 /Tb 0.91 Eu 0.09 , the rapid, selective and discriminative detection of analogous C 60 and C 70 can be easily achieved after the spectral and statistical analyses of fluorescent sensing signals on four emission bands (416, 543, 447 and 615 nm), excited by two irradiation lights (370 and 394 nm). Titration experiments further verify the very high linearity for both C 60 and C 70 and allow their detection at concentrations as low as 1.72 μM (C 60 ) and 0.09 μM (C 70 ). Moreover, this fluorescent probe also shows its reliable abilities to identify proportional C 60 /C 70 mixtures and monitor C 60 and C 70 contents in actual soil sample. It is believed that our proposed lanthanide-base fluorescent matrix not only verify the feasibility and potential of fluorescent chemosensing methodology for the fullerene detection but also provide a valuable tool for potential applications.
研究领域:
化学
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材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2016
·
IF 11.553
Xiaopeng Xu,Zuojia Li,Zhenguo Wang,Kai Li,Kui Feng,Qiang Peng
A series of crystalline copolymers , PBDTSA-DAPT, PBDTTA-DAPT and PBDTTS-DAPT, have been designed towards the application of multi-blend polymer solar cells (PSCs). These copolymers exhibit low-lying HOMO levels by incorporating benzodithiophene (BDT) donor and 9,10-diazaphenanthro[3,4- c ;5,6- c ]bis[1,2,5]thiadiazole (DAPT) acceptor in the main chains. They were added as the hole-cascade polymer donors into the PTB7: PC 71 BM blend. When adding 10 wt% of the resulting copolymers, the PCEs of 8.59%, 9.03% and 8.91% were achieved for PBDTSA-DAPT-, PBDTTA-DAPT- and PBDTTS-DAPT-based ternary devices, respectively. In order to further elevate the performance of PBDTTA-DAPT devices, indene-C70 bisadduct (IC 70 BA) was also incorporated into the PBDTTA-DAPT-based ternary blend. This cascade band structure would give steadier energy level alignment and afford more charge transfer channels, which could promote simultaneously both the hole and electron transfer . When adding 5 wt% of IC 70 BA, the quaternary PSC device showed a top PCE of 10.20%. This PCE value is the best efficiency for PTB7 based PSCs reported so far. Our work not only demonstrates a design strategy for high performance hole-cascade polymer donors in multi-blend PSCs, but also provides a first quaternary strategy with bilateral cascade energy band structures to increase the V oc , J sc and FF simultaneously for high efficient organic solar cell applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
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