ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2016
·Vol. 408
·期 13
·3527-3536
·
IF 3.125
Sun Yanan,Lv Zhengxian,Sun Zhiwei,Wu Chuanxiang,Ji Zhongyin,You Jinmao
A simple, sensitive, and selective high-performance liquid chromatography (HPLC) method using 9-(2-iodoethyl)acridone (IEA) as a novel fluorescence derivatizing agent for the simultaneous determination of six thiophenols has been developed. An efficient Pb 2+ -modified OASIS-MCX cartridge was used and could get good recoveries. IEA was successfully used to label thiophenols with high sensitivity and excellent selectivity. The effects of different solvents, pH, and surfactants on fluorescence properties of derivatives were investigated. To obtain the best labeling efficiency, derivatizing parameters including pH value, temperature, and concentration of IEA, as well as types of catalysts were also evaluated in detail. Under the optimal conditions, the separation could be achieved within 12 min with limits of detection (LODs) in the range of 0.6–5.8 μg L −1 and relative standard deviations (RSDs) < 3.9 %. This is the first time that IEA was applied to the analysis of thiophenols, and the established method has been successfully applied to the trace level detection of thiophenols in industrial wastewater samples.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2018
·
IF 2.011
Guanfan Chen,Mengzhuo Tang,Xiufang Fu,Fenmin Cheng,Yunfei Long,Yuanyuan Li,Yinchun Jiao,Rongjin Zeng
Thiophenol and its derivatives easily cause damage to aquatic bioorganisms, animals and even human being, therefore, fluorescent probes for detecting thiophenol with sensitive and selective characters are highly popular. In this study, a highly sensitive and selective porphyrin-based fluorescent sensor ( M1 ) was reported for detection of thiophenol based on the steric hindrance effect, where the recognition unit, 7-nitrobenzo[ c ][1,2,5]oxadiazolyl group is linked to aromatic ortho -position in the porphyrin , and correspondingly the fluorescence of fluorescein is efficiently quenched. Its time of fluorescence response for thiophenol was only 60s, and its fluorescence responses for the other anions/molecules were all far lower than the relative fluorescence ratio values for thiophenol, which means that the porphyrin-based fluorescent sensor is rapid, sensitive and selective to detection of thiophenol. This approach offers some useful insights for designing sensitive and selective fluorescent turn-on sensors in the detection assays for other analytes.
研究领域:
分析化学
·
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2023
·
IF 15.1
Yulu Xu,Xia Hu,Yuyuan Chen,Sijie Lin,Chen Wang,Faliang Gou,Xiaogang Yang,Weiwei Zheng,De-Kun Ma
Resorcinol-formaldehyde (RF) resin represents a promising visible-light responding photocatalyst for oxygen reduction reaction (ORR) toward H 2 O 2 production. However, its photocatalytic ORR activity toward H 2 O 2 generation is still unsatisfied for practical application. Herein, 3-hydroxythiophenol-formaldehyde (3-HTPF) resin microspheres synthesized through polycondensation reaction between 3-HTP and formaldehyde at room temperature and subsequent hydrothermal treatment exhibit enhanced photocatalytic ORR activity is reported. The experimental results show that the partial substitution of hydroxy group (─OH) by sulfhydryl one (─SH) through using 3-HTP to replace resorcinol could slow the rates of nucleation and growth of the resin particles and lead to strongly π -stacked architecture in 3-HTPF. The introduction of ─SH group can also improve adsorption ability of 3-HTPF to O 2 molecules and enhance ORR catalytic activity of the photocatalysts. Stronger built-in electric field, better adsorption ability to O 2 molecules, and increased surface catalytic activity collectively boost photocatalytic activity of 3-HTPF microspheres. As a result, H 2 O 2 production rate of 2010 µ m h −1 is achieved over 3-HTPF microspheres at 273 K, which is 3.4 times larger than that obtained using RF submicrospheres (591 µ m h −1 ). The rational substituent group modulation provides a new strategy for designing polymeric photocatalysts at the molecular level toward high-efficiency artificial photosynthesis.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Energies
·
2021
·Vol. 14
·期 1
·234
·
IF 3.004
Yu Ji,Qiang Yao,Weihong Cao,Yueying Zhao
To probe the possibility of thiophenolate as an origin of dibenzothiophenes (DBTs) and establish the detailed chemical transformations from thiophenolate to DBTs, the thermal degradation of thiophenolate has been carried out at various temperatures. The characterizations of both gaseous products and solid residues indicate that DBTs together with benzene, diphenyl sulfide, and diphenyl disulfide are the major degradation products. The presence of benzene supports that the thermal degradation of thiophenolate begins with the homolysis of Ar‒H bonds. The subsequent hydroarylation followed by the elimination and cyclization reactions facilely generates DBTs. The transformation of thiophenolate to DBTs is chemically simple and highly geochemically feasible. It readily unifies the chemical pathways involved in the generation of DBTs from thiophenolate and that of dibenzofurans from phenolate in nature.Keywords:thiophenolate;dibenzothiophene;phenyldibenzothiophene;homolysis;hydroarylation;aromatic sulfur heterocyclics
研究领域:
化学
·
地质化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Zi Yu Pan,Peng Fei Gao,Chun Ju Jing,Jun Zhou,Wen Ting Liang,Gang Lei,Wei Feng,Yuan Fang Li,Cheng Zhi Huang
Understanding plasmon-driven photocatalytic reaction (PPR) is crucial for photoelectric or light-to-energy conversion. By using a local surface plasmon resonance (LSPR) spectroscopy coupled dark-field microscopy to visually monitor the LSPR scattering properties of a single silver nanoparticle (AgNP) and microscopically count the electrons gain and loss during the PPR of 4-nitrothiophenol (4-NTP) dimerizing into 4,4’-dimercaptoazobenzene (DMAB), herein we found that the PPR process is proton coupled electron transfer (PCET) dependent, during which alternation at first and then simultaneity of electrons gain and loss occur. This finding of both PCET and time-dependent alternation-simultaneity of electrons gain and loss in the PPR can furnish exciting new opportunities for improving efficient light-to-energy, photoelectric conversions and gaining an insight into plasmon-driven photocatalytic formation of the azo compound. Therefore, this visually monitoring strategy can help in implementing environmental remediation by reducing emissions of toxic substance such as azo compound and its derivatives at the source.
研究领域:
物理化学
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环境科学
·
纳米技术
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 40
·17360-17367
·
IF 3.288
Yongquan Wu,Aiping Shi,Huiying Liu,Yuanyan Li,Weican Lun,Hong Zeng,Xiaolin Fan
Thiophenol (or PhSH) is widely utilized for producing pesticides, dyes, and pharmaceuticals. However, high-concentration thiophenol not only has adverse effects on living organisms, but also causes environment pollution. Herein, we designed and synthesized a novel near-infrared (NIR) xanthene-based fluorescent probe (NOF) for real-time detection of thiophenol in vitro and in vivo. The probe NOF had good sensitivity and selectivity, and a fast response towards thiophenol. The thiophenol-sensing mechanism was verified using high resolution mass spectroscopy (HR-MS) and density functional theory (DFT) calculation. The probe NOF was also successfully applied to detect thiophenol in real water samples. Finally, owing to its NIR-emitting properties, it was successfully used for NIR fluorescence imaging of thiophenol in living cells and mice.
研究领域:
分析化学
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环境科学
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分子生物学
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生物成像
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 28
·期 2
·e202103709
·
IF 5.236
Yaoli Wang,Yan Liang,Huixiang Sheng,Jin Wang,Junjie Wang,Shunhao He,Mengdan Guan,Yaqi Chen,Gang Lu
Graphical Thiol/thiophenol molecules can modulate the plasmon-mediated silver oxidation. Compared with molecules having electron donating groups, molecules having electron accepting groups accelerate the silver oxidation dramatically. The modulation of silver oxidation is attributed to the modulation of the charge separation between the Ag NPs and the adsorbed thiol or thiophenol molecules. Surface plasmon can trigger or accelerate many photochemical reactions, especially useful in energy and environmental industries. Recently, molecular adsorption has proven effective in modulating plasmon-mediated photochemistry, however the realized chemical reactions are limited and the underlying mechanism is still unclear. Herein, by using in situ dark-field optical microscopy, the plasmon-mediated oxidative etching of silver nanoparticles (Ag NPs), a typical hot-hole-driven reaction, is monitored continuously and quantitatively. The presence of thiol or thiophenol molecules is found essential in the silver oxidation. In addition, the rate of silver oxidation is modulated by the choice of different thiol or thiophenol molecules. Compared with the molecules having electron donating groups, the ones having electron accepting groups accelerate the silver oxidation dramatically. The thiol/thiophenol modulation is attributed to the modulation of the charge separation between the Ag NPs and the adsorbed thiol or thiophenol molecules. This work demonstrates the great potential of molecular adsorption in modulating the plasmon-mediated photochemistry, which will pave a new way for developing highly efficient plasmonic photocatalysts.
研究领域:
化学
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材料科学
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光学
·
表面科学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2024
·
IF 3.3
Kaili Wang,Yameng Zhu,Liuyingzi Yu,Lu Jiang,Xinya Chen,Zhihao Lu,Kun Gao,Xing Kang,Zhongyan Gong,Qiming Peng,Gang Lu
The decarboxylation reaction can be accelerated with the assistance of localized surface plasmon resonance under mild conditions, benefiting from the enhanced light utilization and excitation of high-energy hot carriers. However, the reaction rate remains far below the theoretical limit since plasmon-excited hot carriers easily recombine due to their ultrashort lifetime. Herein, we effectively accelerate the decarboxylation reaction of p-mercaptobenzoic acid (PMBA) on the surface of silver nanoparticles (AgNPs) by coadsorbing p-hydroxythiophenol (PHTP) molecules as molecular cocatalysts. More importantly, the period of this coadsorption is crucial to the obtained reaction rate acceleration. Compared with short-period coadsorption, long-period coadsorption could lead to a larger acceleration in reaction rate, due to the further promoted separation of plasmon-generated hot carriers. This work provides a simple, convenient, and effective strategy to boost the decarboxylation reactions on silver surfaces. This strategy holds potential for developing a variety of highly efficient plasmon-based catalysts in the near future.
研究领域:
物理化学
·
催化
·
纳米技术
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产品关联
DOI
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Yuqin Chen,Yameng Zhu,Huixiang Sheng,Jin Wang,Chengyu Zhang,Yaqi Chen,Wei Huang,Gang Lu
Surface plasmons have received much attention in chemical reactions because of their high light-utilizing efficiency, high reaction rate, and mild reaction conditions. However, the potential of plasmonic photochemistry has not been fully exploited, mainly due to the limited lifetime of plasmon-generated hot carriers. Herein, using in situ Raman spectroscopy, we reveal that the coadsorption of p-hydroxythiophenol (PHTP) molecules significantly accelerates the plasmon-mediated decarboxylation reaction of p-mercaptobenzoic acid adsorbed on silver nanoparticles. The observed boosting of the decarboxylation reaction is attributed to the matched energy distribution of the plasmon-generated hot electrons to the lowest unoccupied molecular orbital (LUMO) level of the coadsorbed PHTP molecules. Our findings will help not only to deepen the understanding of the plasmon-mediated chemical reactions but also to fabricate highly efficient plasmonic catalysts conveniently and cost-effectively.
研究领域:
等离子体学
·
光化学
·
催化
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2024
·
IF 5.5
Zongao Dou,Hemin Zhang,Jiajun Li,Jing Sun,Qiang Fang
Four biobased phosphate-containing aryl monomers with methoxy, allyl, and vinyl groups as substituents have been successfully synthesized. Copolymerizing these monomers with thiophenol or mercaptans via the photoclick thiol–ene reaction gives the polymers with refractive indices (nD) of 1.63–1.70 and Abbe numbers (vD) of 12.8–38.5. An investigation of the relationship of the vD values with the substituents on the benzene rings of the monomers indicates that methoxy and vinyl groups can collectively increase the vD values. In comparison with allyl groups, vinyl groups endow the polymers with both higher nD and vD. Moreover, these polymers also display high transmittance, high thermostability, and low haze values in the visible-light region, suggesting that these biobased functional monomers are satisfactory precursors used in the fabrication of optical devices.
研究领域:
材料科学
·
聚合物化学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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