CHEMISTRY & BIODIVERSITY
·
2022
·Vol. 19
·期 4
·e202100746
·
IF 2.745
Huanhuan Dong,Hongmei Zhang,Shichao Xu,Jing Wang,Songlin Dai,Yuxiang Chen,Liangwu Bi,Zhendong Zhao
Three series of secondary ammonium chloride from turpentine were synthesized and evaluated as botanical herbicides. The preemergence herbicidal activities against ryegrass ( Loliun multiflorum ) and barnyard grass ( Echinochloa crus-galli ) were investigated using water as the only solvent. Their toxicity was evaluated by cytotoxicity assays. Preliminary results demonstrated that the herbicidal performance of the prepared salts was similar or much higher than that of corresponding secondary amines and even commercial herbicide glyphosate. Promisingly, compound 14e containing a cyclohexyl-substituted p- menthene skeleton with an IC 50 value of 0.0014 mM against root growth of ryegrass showed 39-fold higher herbicidal activity than glyphosate. Besides, this compound was found to be nontoxic to human and animal cells, indicating the potential application as a water-soluble herbicide for ryegrass control. Graphical
研究领域:
植物学
·
农业科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Haijun Cheng,Min Liang,Suyi Dai,Xianrui Lu,Qilin Huang,Fang Lai,Li Ma,Weiguang Li,Xiongmin Liu
α-Pinene, β-pinene and turpentine are renewable resources that are widely used in fine chemicals, fuels and other applications, and the safety of their production, transport and use should be considered. In this work, the characteristics and hazardous of the oxidation process of α-pinene, β-pinene and turpentine were investigated by using a novel mini closed pressure vessel testing system (MCPVT). The oxidation products were resolved by gas chromatography-mass spectrometry (GC–MS). The results showed that α-pinene, β-pinene and turpentine were stable under nitrogen atmosphere and very active chemically under oxygen atmosphere. The activation energies ( E a ) of α-pinene, β-pinene and turpentine were calculated to be 78.87, 109.69 and 98.82 kJ/mol, respectively, using pressure–time (P-t) curves. So, the reaction activity sequence was α-pinene > turpentine > β-pinene. The peroxide concentrations of α-pinene (363 K), β-pinene (358 K) and turpentine (363 K) could reach 81.94, 84.70 and 75.76 mmol/kg, respectively, at relatively low temperatures. 0.6 g of α-pinene exploded at a system temperature of 369 K and an oxygen pressure of 1.23 MPa. 0.6 g of β-pinene also exploded at a system temperature of 373 K and an oxygen pressure of 1.27 MPa. 0.4 g of turpentine experienced thermal runaway at a system temperature of 384 K and an oxygen pressure of 0.81 MPa. The major oxidation products of α-pinene are α-campholenaldehyde, laevo-pinocarveol, verbenol, verbenone, bicyclo (3.1.1)heptane-2, 3-diol, 2, 6, 6-trimethyl, 2-cyclohexen-1-ol, 2-methyl-5-(1-methylethenyl)-, (1R,5R)-rel-, cyclobutaneacetic acid, 3-acetyl-2, 2-dimethyl, myrtenol and myrtenal. The major thermal runaway products are water, ethanol, acetone, acetic acid, 2-pentanone, propyl acetate, toluene, cymene and methylacetophenone. The major oxidation products of β-pinene are nopinone, laevo-pinocarveol, pinocarvone, myrtenol, myrtenal and perillyl alcohol. The major thermal runaway products are water, ethanol, acetone, n-ethyl propanoate, toluene, butyl acetate, cymene, apocamphor, nopinone, bornyl formate, methylacetophenone and dihydronopol. The oxidation products and thermal runaway products of pinene were significantly different. Possible reaction pathways for α-pinene and β-pinene are proposed.
研究领域:
化学工程
·
安全科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2018
·Vol. 23
·期 2
·356
·
IF 3.098
Yanqing Gao,Jingjing Li,Jian Li,Zhanqian Song,Shibin Shang,Xiaoping Rao
Turpentine is a volatile component of resin, which is an abundant forest resource in Southern China. As one of the most important components, the integrated application of β-pinene has been studied. The broad-spectrum evaluation of β-pinene and its analogues has, therefore, been necessary. In an attempt to expand the scope of agro-activity trials, the preparation and the evaluation of the herbicidal activity of a series of β-pinene analogues against three agricultural herbs were carried out. In accordance with the overall herbicidal activity, it is noteworthy that compounds6k,6l, and6mdemonstrated extreme activity with IC50values of 0.065, 0.065, and 0.052 mol active ingredients/hectare againstE. crus-galli. The preliminary structure–activity relationship (SAR) was analyzed and the compounds with the appropriate volatility and substituent type that had beneficial herbicidal activity were analyzed. Simultaneously, the quantitative structure–activity relationship (QSAR) model was built and the most important structural features were indicated, which was, to a certain extent, in line with the SAR study. The study aimed to study the application of the forest resource turpentine in agriculture as a potential and alternative approach for comprehensive utilization.Keywords:turpentine;herbicidal activity;SAR;QSAR
研究领域:
农学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2019
·
IF 2.584
Yanqing Gao,Jin Hao,Jian Li,Zhanqian Song,Shibin Shang
For the purpose of chiral pesticide development, the natural chiral structure of turpentine should be applied rationally. Two series of amide derivatives were prepared to study the effect of chiral center retention on the fungicidal activity. The investigation of fungicidal activity against three pathogenic microbes was carried out extensively. Some satisfactory conclusions were obtained from the activity evaluation. Above all, compounds (5′a-l) derived from cis-myrtlecanic acid (a chiral compound obtained from β-pinene) exhibited better activity than compounds (5a-l) derived from dehydrocumic acid (achiral compound obtained from β-pinene). The overall effect was good, and it was remarkable that compounds 5′d (substitute with N-(4-(trifluoromethyl)phenyl), 5′e (substitute with N-(4-fluorophenyl)), and 5′f (substitute with N-(4-chlorophenyl)) demonstrated extremely excellent activity, with EC50 values of 1.604, 1.822, and 2.296 μg/mL against Valsa mali. The above three compounds also showed a good control effect against V. mali in vitro on an apple branch. Treatment with 5′d, 5′e, and 5′f against V. mali resulted in significantly influenced physiological and biochemical indices, as well as markedly reduced pectinase activity in comparison with untreated controls. The preliminary structure–activity relationship (SAR) was summarized, showing that compounds obtained with chiral centers, a halogen atom, and small steric hindrance showed better performance. At the same time, the quantitative structure–activity relationship (QSAR) model (R2 = 0.9288, F = 62.01, S2 = 0.0138) was obtained, and two most important structural features were maximum net atomic charge for a F atom and shadow indices. Guided by this study, the highly efficient, low-toxicity, and environmentally friendly fungicide can be prepared through reasonable modification of terpene.
研究领域:
农药学
·
有机化学
·
植物保护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Shichao Xu,Xiaojing Zeng,Songlin Dai,Jing Wang,Yuxiang Chen,Jie Song,Yunfei Shi,Xian Cheng,Shengliang Liao,Zhendong Zhao
In this study, we will report on the synthesis and application of efficient botanical agrochemicals from turpentine for sustainable crop protection. Two series of turpentine derived secondary amines were synthesized and identified by FT-IR, 1H NMR, 13C NMR, and HRMS. The herbicidal activities against Echinochloa crus-galli were evaluated. The potential toxicity of the synthesized compounds was tested by MTT cytotoxicity analysis. The effect of structure of the synthesized secondary amines and corresponding Schiff base compounds on their activities was investigated by quantitative structure–activity relationship (QSAR) study. All target products were found to be low toxicity, with similar or higher herbicidal activities than commercial herbicides diuron and Glyphosate. Results of QSAR study showed that a best four-descriptor QSAR model with R2 of 0.880 and Rloo2 of 0.818 was obtained. The four descriptors most relevant to the herbicidal activities are the min valency of a N atom, the max total interaction for a C−H bond, the relative number of aromatic bonds, and the min partial charge (Qmin).
研究领域:
农业化学
·
植物科学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
·
2016
·
IF 1.651
Lulu Dai,Mingyuan Ma,Guanqun Gao,Hui Chen
Bark beetles oxidize the defensive allelochemicals of their host trees both to detoxify them and convert them into components of their pheromone systems which were catalyzed by cytochrome P450 enzymes (CYPs) and occur in different tissues of the insect. We study P450 genes in the Chinese white pine beetle ( Dendroctonus armandi ), and some bio-information analysis was done for the full-length deduced amino acid sequences. The tissue specificity of these P450 genes was determined in three tissues (antenna, gut and reproductive organs). Differential expression of the P450 genes was observed between sexes, and within these significant differences exposed to stimuli (α-pinene (1:1 racemic mix), (S)-(−)-α-pinene, (S)-(−)-β-pinene, (+)-3-carene, (±)-limonene and turpentine oil) at 24 h. Increased expression of P450 genes suggested that they play a role in the detoxification of monoterpenes released by the host trees. The different transcript accumulation patterns of these bark beetle P450 genes provided insight into ecological interactions of D . armandi with its host pine.
研究领域:
昆虫学
·
分子生物学
·
生态学
·
生物信息学
✓ 已验证
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2026
·
IF 6
Taozhong Zhang,Wanzhong Yin,Jin Yao,Weifan Du,Xiaoqi Ban,Wenju Sun,Chao Yin
DM was first introduced as a galena depressant for Mo–Pb separation. • DM exhibited high selectivity by strongly depressing galena while exerting minimal effect on molybdenite. • DM chemisorbed on galena through S/N–Pb coordination and markedly reduced surface hydrophobicity. The inherent similarity of the surface physicochemical properties of molybdenite and galena poses a substantial obstacle to their selective flotation separation. In this study, 4,6-diamino-2-mercaptopyrimidine (DM) was investigated as a potential selective depressant for galena. Under conditions of pH 8 and 20 mg/L DM, molybdenite recovery exceeded 98%, whereas galena recovery decreased to 11.25%, corresponding to a separation index of 22.96. A combination of multiscale interfacial characterization methods, including adsorption measurements, electrokinetic and wettability analyses, FTIR, XPS, and DFT calculations, was employed to clarify the interaction mechanism of DM at mineral surfaces. The results collectively indicate that DM exhibits stronger adsorption on galena than on molybdenite, thereby significantly enhancing the hydrophilicity of galena. FTIR, XPS, and DFT analyses further indicate that the selectivity originates from chemisorptive interaction between DM and surface Pb sites through the involvement of its S and N donor atoms. Overall, these findings highlight the considerable potential of DM for the selective flotation separation of molybdenite from galena and provide mechanistic insight into the rational design and optimization of selective flotation strategies. Download: Download high-res image (288KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 4.6
Xie Zhi-Hui,Tang Pei-Chun,Xu Dan,Ouyang Yue-Jun,Fan Xiao-Qiang,Tang Jun-Lei,Alwan Maadh Hasan,Khalaf Ali Hussein,Al-Najafi Saba Abdulhussein A.,Yong Qi-Wen
Magnesium alloys suffer from severe corrosion in chloride-containing environments, which significantly restricts their structural application. In this study, a core-shell smart nanocontainer (PHIO@ZIF-8/PST, denoted as PZS) was constructed by integrating a pH-responsive metal–organic framework reservoir with an in situ assembled poly(sodium thioctate) (PST) functional shell, and further incorporated into an epoxy matrix to develop an intelligent anticorrosion coating. The ZIF-8 core serves as an efficient loading platform for a chelating corrosion inhibitor (PHIO) and provides pH-triggered release capability, whereas the PST shell simultaneously enhances interfacial compatibility and introduces additional chemical protection. Structural analyses confirmed the successful construction of the core-shell architecture and the preservation of crystallinity after functional modification. Electrochemical and ion-release studies demonstrated that PZS nanocontainers exhibited pronounced pH-responsive behavior, enabling accelerated inhibitor release under acidic or alkaline conditions. When incorporated into the epoxy (EP) coating, PZS significantly improved the interfacial densification, reduced the defect density, and prolonged the diffusion pathways for aggressive species. Long-term electrochemical impedance spectroscopy and salt spray tests revealed that the PZS/EP coating maintained impedance values three orders of magnitude higher than that of the pristine epoxy after 28 days of immersion, indicating outstanding corrosion resistance. The enhanced performance arises from the synergistic coupling of the physical barrier reinforcement, inhibitor chelation, and in situ formation of protective Mg–PST complexes at active corrosion sites. This study provides a generalizable strategy for constructing multifunctional smart coatings for the durable protection of lightweight metal substrates.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2025
·
IF 5.3
Yaoyi Hu,Xiqiang Yuan,Zhengquan Zhang,Yu Zhang,Han Ma,Yunfei He,Shaoyun Shan,Tianding Hu
Natural borneol has enormous medicinal value (like clearing heat, detoxifying, relieving pain, and other effects) but has a low yield and high price. Compared with the natural extraction method to obtain borneol, a synthetic method has significant advantages such as high yield, environmental protection, and high economic benefits. In the synthesis method, the catalyst is the most key factor. In this study, two catalysts (SO 4 2- /ZrO 2 -TiO 2 and Al 2 (SO 4 ) 3 /ZrO 2 -TiO 2 ) with high catalytic performance and high positive selectivity were synthesized by impregnation method to synthesize borneol from α-pinene. The optimum synthesis conditions of SO 4 2- /ZrO 2 -TiO 2 were as follows: n(Zr): n(Ti) = 3: 1, sulfuric acid concentration 2 mol/L, calcination temperature 550 °C, the yield of borneol was 68.14 %. Based on the preparation of catalyst SO 4 2- /ZrO 2 -TiO 2 , the optimum synthesis conditions of Al 2 (SO 4 ) 3 /ZrO 2 -TiO 2 were as follows: the concentration of aluminum sulfate was 0.4 mol/L, the calcination temperature was 600 °C, and the yield of borneol was 74.58%, Compared with the highest yield of 59.89% reported in the existing literature, the performance is improved by 13.96%. In addition, the mechanism of the esterification and saponification reaction of borneol has been in the blank stage. We used the density functional theory (DFT) to explore the reaction mechanism.
研究领域:
有机化学
·
催化化学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Zuorong Huang,Quanquan Tang,Jing He,Lei Wu,Fengmin Liu,Xishuang Liang,Bin Wu,Mingliang Fu,Geyu Lu
Diesel engines in the field of transportation are one of the important sources of carbon dioxide (CO2) emissions, and incomplete combustion and complex working conditions make it difficult to accurately calculate their CO2 emissions by using the intake volume. In addition, the high temperature and harsh environment of exhaust gas also put higher requirements on the response speed, stability, and high-temperature resistance of the sensor. In this study, Co3O4 was doped into the auxiliary phase Na2CO3 as a catalyst and stabilizer to improve the sensor sensitivity, and solid electrolyte NASICON was doped to improve the sensor response speed. The results show that when the doping ratio of Na2CO3 and NASICON is the same as 10 wt %, the response to CO2 of 5000 ppm can reach −67 mV, and the full-range second-level response to CO2 is realized. The detection range is up to 0–180,000 ppm, the sensitivity is −64 mV/decade, the sensor has good selectivity to CO2, the response change in the range of 20–98% RH is negligible, and the response change in 60 days is only −8.66%. This sensor had good reproducibility. In addition, the in situ on-board CO2 sensing probe and test system were developed. The sensor response was calibrated against the measurement values of standard instruments on the entire vehicle. Based on the calibration results, a regression curve was established and the vehicle was tested; the test results and the standard instrument test value deviation are basically less than 10% to verify the practicality of the component in the exhaust gas detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
·
2025
·Vol. 25
·期 13
·3948
·
IF 3.5
Kuo Zhao,Yunbo Shi,Haodong Niu,Qinglong Chen,Jinzhou Liu,Bolun Tang,Canda Zheng
Polyaniline (PANI) is an important conductive-polymer gas-sensing material with working temperature and mechanical flexibilities superior to those of conventional metal oxide sensing materials. However, its applicability is limited by its low sensitivity, high detection limits, and long response/recovery times. In this study, we prepared PANI/WS2composites via chemical oxidative polymerization and mechanical blending. A multilayer sensor structure—sequentially printed silver-paste heating electrodes, fluorene polyester insulating layer, silver interdigitated electrodes, and sensing material layer—was fabricated on a polyimide substrate via flexible microelectronic printing and systematically characterized using scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The optimized 5 wt% WS2composite showed enhanced gas-sensing performance, with 219.1% sensitivity to 100 ppm ammonia (2.4-fold higher than that of pure PANI) and reduced response and recovery times of 24 and 91 s, respectively (compared to 81 and 436 s for pure PANI, respectively). Notably, the PANI/WS2sensor detected an ultralow ammonia concentration (100 ppb) with 0.104% sensitivity. The structural characterization and performance analysis results were used to deduce a mechanism for the enhanced sensing capability. These findings highlight the application potential of PANI/WS2composites in flexible gas sensors and provide fundamental insights for PANI-based sensing materials research.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Guofan Wang,Tao Wang,Tanrui Xi,Yangfan Sun,Ke Wan,Qingshan Li,Yuanna Sun
The performance of intermediate-temperature solid oxide fuel cells (SOFCs) depends on cathode materials with low thermal expansion coefficients to match the electrolyte. La 0.95 Ag 0.05 CoO 3 perovskite exhibits mixed ionic-electronic conductivity and high oxygen adsorption capacity, making it a promising cathode material. However, its high thermal expansion coefficient limits compatibility with the electrolyte. This study introduces a dispersive coating approach to enhance thermal expansion compatibility. A high-activity, durable cathode is fabricated and compared with traditional Co-based cathodes. In a 100-hour R p test at 700 ℃, the coated cathode exhibits excellent stability, with only 0.4 % fluctuation over 31–50 cycles. The findings demonstrate that the dispersive coating effectively offsets the high thermal expansion of Co-containing perovskite cathodes, providing a promising strategy for developing durable, high-performance SOFCs.
研究领域:
能源材料
·
电化学
·
陶瓷材料
·
燃料电池技术
✓ 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）