JOURNAL OF ORGANIC CHEMISTRY
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2025
·
IF 3.6
Jia-Wei Li,Shuai Shi,Xiao-Hong Chen,Mao-Gui Huang,Yong-Liang Ban,Hui Zhang,Yue-Jin Liu
Direct functionalization of native (N–H) indoles via C–H activation remains a challenge. Herein, we report a salicylaldehyde-promoted cobalt-catalyzed selective C2–H Heck reaction of native (N–H) indoles with both active and unactivated olefins in the presence of free N–H bonds. A series of structurally diverse C2-alkenylated native (N–H) indoles including natural product and drug derivatives were prepared directly and effectively without additional preprotection and deprotection procedures.
研究领域:
有机化学
·
药物化学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jialu Zhang,Yu Fu,Peng Chen,Bowen Liu,Cuiling Ren
Salicylaldehyde is a significant fine chemical product utilized in the flavoring of various foods, excessive intake of salicylaldehyde is detrimental to human health. Its accurate quantitative detection holds considerable importance. Compared with “turn-off” probes, the “turn-on”one allow for more sensitive detection. New silicon nanoparticles (D-SiNPs) which can be used to detect salicylaldehyde by “turn-on” mode were prepared in this work. This D-SiNPs demonstrates highly stability, selectivity and sensitivity. Within the concentration range of 5–50 μM, salicylaldehyde concentration exhibits a strong linear relationship with fluorescence intensity, the limit of detection is calculated to be 0.97 μM. It can be applied to detect salicylaldehyde in baked goods and beverages, achieving good recoveries. These results are highly satisfactory. The detect mechanism was investigated systemetically, the results illustrates this detection is based on Schiff reaction between the amino groups of silicon nanoparticles and aldehyde group of salicylaldehyde, which satisfies the ESIPT mechanism.
研究领域:
分析化学
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食品科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 5
·317
·
IF 3.504
Zhichuan Shen,Hongjun Zhou,Huayao Chen,Hua Xu,Chunhua Feng,Xinhua Zhou
Salicylaldimine-modified mesoporous silica (Sal-MCM-3 and Sal-MCM-9) was prepared through a co-condensation method with different amounts of added salicylaldimine. With the coordination from the salicylaldimine, zinc ions were impregnated on Sal-MCM-3 and Sal-MCM-9. Then, Zn-Sal-MCM-3 and Zn-Sal-MCM-9 were calcined to obtain nano-zinc oxide loaded on mesoporous silica (ZnO-MCM-3 and ZnO-MCM-9). The material structures were systematically studied by Fourier transform infrared spectroscopy (FTIR), N2adsorption/desorption measurements, X-ray powder diffraction (XRD), zeta potential, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet diffused reflectance spectrum (UV-vis DRS), and thermogravimetry (TGA). Methyl orange (MO) was used to investigate the photocatalysis behavior of ZnO-MCM-3 and ZnO-MCM-9. The results confirmed that nano ZnO was loaded in the channels as well as the outside surface of mesoporous silica (MCM-41). The modification of salicylaldimine helped MCM-41 to load more nano ZnO on MCM-41. When the modification amount of salicylaldimine was one-ninth and one-third of the mass of the silicon source, respectively, the load of nano ZnO on ZnO-MCM-9 and ZnO-MCM-3 had atomic concentrations of 1.27 and 2.03, respectively. ZnO loaded on ZnO-MCM-9 had a wurtzite structure, while ZnO loaded on ZnO-MCM-3 was not in the same crystalline group. The blocking effect caused by nano ZnO in the channels reduced the orderliness of MCM-41. The photodegradation of MO can be divided in two processes, which are mainly controlled by the surface areas of ZnO-MCM and the loading amount of nano ZnO, respectively. The pseudo-first-order model was more suitable for the photodegradation process.Keywords:nano ZnO;mesoporous silica;salicylaldimine;coordination;photodegradation
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
·
2017
·Vol. 38
·期 8
·875-879
·
IF 0.602
Nai-Di Tan,Yaqing Yuan,Jian-Hang Yin,Na Xu
A novel assay for H 2 O 2 based on luminescence quenching is developed from the Dakin reaction between deprotonated salicylaldehyde (D-SA) and H 2 O 2 . Under alkaline condition, the phenolic hydroxyl group of SA is deprotonated, exhibiting good luminescence emission ability ( λ ex = 433 nm, λ em = 508 nm). Luminescence of D-SA is quenched by H 2 O 2 in a concentration-dependent manner. Good linearity is obtained with a regression coefficient of 0.9989 in the range of 0.3 ~ 150 μM and a detection limit (LOD) is 30 nM. In addition, D-SA luminescence probe shows good biocompatibility and low cytotoxicity to HeLa cells through MTT assay. The feasibility for in vitro applications is demonstrated through confocal laser scanning microscopy.
研究领域:
分析化学
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生物医学
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化学生物学
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产品关联
DOI
高影响因子
Canadian Journal of Chemistry
·
2025
·
IF 1
Xiangdong Ji,Pengji Yan,Wenqin Yang,Yujiao Peng,Cheng Cao
Two new colorimetric receptors 1 and 2 nitrophenyl as signaling units and imine moieties as binding sites were synthesized via a simple condensation reaction and characterized by 1H NMR, 13C NMR, FTIR, and HRMS. The colorimetric sensing properties of the receptors toward various anions were studied using naked eye detection, UV-vis spectroscopy, and 1H NMR titration. The results show that receptors 1 and 2 exhibit good UV-Vis recognition capabilities for F−, Ac−, and CN−, and can recognize CN− with the naked-eye in a H2O/DMSO (3:7, V/V) solution. The detection limit for CN− recognition by receptors 1 and 2 was as low as 1.31 µmol, and we prepared test papers for detecting anions using these receptors. The Job's plot analysis demonstrates a 1:1 stoichiometric binding ratio between F− and the receptors. The recognition mechanism of CN− was inferred using UV-vis and 1H NMR titrations, HRMS, and theoretical calculations. Such stripes can serve as a practicable colorimetric probe for the detection of ions in many fields and avoid more expensive equipment.
研究领域:
有机化学
·
分析化学
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产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
You-qun Wang,De-jun Zeng,Xiao-hong Cao,Yin Dai,Hui-jie Ma,Yun-hai Liu,Zhi-bin Zhang
In this work, the functional group of salophen with high affinity to U(VI) was grafted to hydrothermal carbon spheres (HCSs) to improve the adsorptive ability for U(VI). Through the application of scanning electron microscopy, Fourier transform infrared, and zeta potential measurement, the micro-morphology, functional group, and surface charge of the adsorbents was characterized. Comprehensive investigation of the factors affected U(VI) adsorbed by HCSs and salophen group modified HCSs (HCSs-sal) were conducted. Different types of kinetic and thermodynamic models were utilized to explore the adsorption processes. The results of this study, indicated that the adsorption of U(VI) on HCSs-sal fitted well to Langmuir equations with the monolayer capacity of 332.51 mg g –1 . Furthermore, the adsorptive selectivity of HCSs for U(VI) was also remarkably enhanced after functionalization with the salophen group. Overall, HCSs-sal appears to have the potential to be a prospective candidate for the selective adsorption of U(VI).
研究领域:
环境科学
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材料科学
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核化学
·
水处理技术
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2019
·
IF 2.12
Mengyu Shi,Chen Xu,Zhihong Yang,Lei Wang,Shujuan Tan,Guoyue Xu
In this study, in order to explore the new kinds of reversible thermochromic materials, four salicylaldehyde Schiff bases (BSP1-4) substituted with methoxy and nitro groups were synthesized and their reversible thermochromic properties were investigated. All compounds were characterized by HNMR, IR, UV–vis, TG-DSC, and SEM techniques. Through HNMR, IR and UV–vis spectra, four target products display different colors. The UV–Vis spectra show that the type and position of the substituents of BSPs can control the absorption wavelength by changing the electronic transition mode, which leads to the difference of the color of the samples. With the increase of light colored samples, the content of the ΔE1 gradually increases until the maximum value of 48.6. TG-DSC result indicates good thermal stability of the BSP below 350 °C. SEM images show that the surface morphologies of four BSP samples are different, including flake, rod and strip. The thermochromic properties of the BSP samples were evaluated using variable temperature FT-IR spectroscopic, solid UV–Vis spectra and response time. DFT calculations were conducted to rationalize the optical behavior of the BSP samples in Enol and Ketone form. The results of variable temperature FT-IR support the hypothesis that the reversible thermochromic mechanism of salicylaldehyde Schiff base is proton transfer . Among all of BSPs, the BSP1 has the best reversible thermochromic cycle stability (ΔE2 = 2.6) and the shortest response time (10s) which can be used as the new promising thermochromism materials.
研究领域:
材料科学
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有机化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jie Zheng,Anruo Luo,Yan Jin,Baicheng Feng,Jianhua Chen,Xingrong Zhang
In this study, 5-nonyl salicylaldoxime (5-NSA) was synthesized and used as a malachite collector. Its flotation performances and adsorption mechanism were systematically investigated by micro-flotation experiments, contact angle measurements, SEM-EDS, FT-IR, XPS and DFTB+ simulations. The micro-flotation test results showed that 5-NSA produced high recovery of malachite at pH 9.0–10.0, while showing lower collecting power to calcite or quartz. The contact angle analysis results indicated that the hydrophobicity of malachite surface was promoted after the adsorption of 5-NSA. SEM confirmed the adsorption of 5-NSA on malachite surface. FT-IR and XPS analysis results confirmed that O and N atoms in the oxime group were immobilized on malachite surface with Cu through O Cu O and N Cu O bonding. Their adsorption performances on malachite surface were simulated by DFTB+ method, including 5-NSA, tert -butylsalicylaldehyde oxime (TBSA) and salicylaldoxime agents, which analyzed the bond lengths of their covalent bond formation with Cu and speculated their adsorption properties. In general, according to the experimental test and simulation results, 5-NSA showed a stronger power to malachite than TBSA and salicylaldoxime, and only a small dosage can produce a high malachite recovery. The findings of this research will be helpful to improve the comprehensive utilization efficiency of malachite and promote the metallurgy of copper oxide ores.
研究领域:
矿物加工工程
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材料科学与工程
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DOI
高影响因子
JOURNAL OF STRUCTURAL CHEMISTRY
·
2023
·Vol. 64
·期 3
·474-485
·
IF 0.8
Li L.,Yuan F.
Abstract Reaction of H 3 salmp (H 3 salmp = 2-bis(salicylidieneamino)methylphenol) and lanthanide ions has afforded three lanthanide-schiff base complexes. One is homodinuclear [Nd(Hsalmp)(NO 3 )(EtOH)] 2 ·2EtOH ( 1 ), other two are heteroleptic tetranuclear [LnNa(salmp)(sal)(EtOH) 3 ] 2 (Ln = Nd ( 2 ), Ce ( 3 ); sal = salicylaldehydato) architectures. In complex 1 , the counter Hsalmp 2– anions adopt NO 3 donor sets, wheras in complexes 2 and 3 , the counter salmp 3– anions select N 2 O 3 donor sets and sal – anions chose O 2 donor sets, in which cleavage of C=N groups in ligand has taken place. The amount of alkali has displayed a vital influence on preparation of these complexes. Both of the complexes were elucidated by elemental analysis, IR, fluorescence spectra and X-ray crystallography.
研究领域:
化学
·
配位化学
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DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 23
·3119
·
IF 4.9
Feng Ye,Zhihao Yan,Haoran Ma,Kangjie Guo,Cheng You,Qingsong Zheng,Shafeng Lv,Xiaodong Wang,Qiufeng Ye,Yeqian Ge,Zhuanyong Zou,Chi Shen
The zinc complex of salicylaldehyde serine Schiff base (ZnL) was synthesized from serine, salicylaldehyde, and zinc diacetate and subsequently applied as a heat stabilizer in poly (vinyl chloride) (PVC). The structure of ZnL was determined using elemental analysis, crucible thermogravimetric method, infrared spectroscopy, thermogravimetric analysis and1H NMR spectra. The heat stability effect of ZnL for PVC was investigated using the Congo red and oven aging methods. The results indicated that PVC stabilized by ZnL exhibited a certain degree of original whiteness and long-term heat resistance. In contrast with PVC stabilized by ZnSt2and Ca/Zn, ZnL was found to be slightly inferior in terms of whiteness but superior in long-term heat resistance. It was observed that complexation of ZnL with CaSt2could enhance both the original whiteness and long-term heat resistance of PVC, while also alleviating the “zinc burning” phenomenon. In contrast, complexation with ZnSt2was found to promote “zinc burning” for PVC. Furthermore, the heat stability mechanism of ZnL for PVC was explored through experiments focusing on HCl absorption and active chlorine substitution. The results demonstrated that ZnL could replace active chlorine on the PVC molecule and absorb HCl gas. Finally, auxiliary heat stabilizers such as pentaerythritol (Pe), dibenzoyl methane (DBM), and epoxidized soybean oil (ESBO) were added to ZnL/CaSt2to evaluate their synergistic effects. It was found that ESBO in PVC exhibited the best synergistic effect with ZnL/CaSt2and was superior to those observed with DBM and Pe. When the ratio of ZnL/CaSt2/ESBO was set at 0.6/2.4/0.9, PVC demonstrated the optimal thermal stability performance.
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产品关联
DOI
PubMed
高影响因子
Journal of Central South University
·
2018
·Vol. 25
·期 4
·701-708
·
IF 0.761
Kong Qian,Bai Xiu-zhi,Lin Hui-ju,Li Hai-pu,Yang Zhao-guang
For the determination of salicylaldoxime in environmental water samples, a stable and rapid method with low detection was proposed and established, based on the liquid-liquid extraction-high performance liquid chromatography with ultraviolet detector. Parameters including extraction solvent, ionic strength, solution pH, and extraction pattern were discussed for the optimal quantification of salicylaldoxime-spiked water. When the described method was applied to four spiked water samples, the obtained average extraction recovery rate was found between 87%–107% and relative standard deviation was below 6%. At the same time, good linear relationships were observed for spiked water samples from 0.01 to 10 μg/mL ( R 2 =0.9993). In addition, the detection limit of salicylaldoxime was revealed between 0.003–0.008 μg/mL, which is two orders of magnitude lower than previously reported results. Thus, the presented method may be advantageous for the high-efficiency determination of salicylaldoxime in water samples.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Tingnan Xiao,Yating Wang,Yongshen Hao,Zidong Cai,Meiying Song,Jincan He,Zhengquan Su,Yan Bai
In weakly acidic BR buffer solution, a convenient and sensitive resonance Rayleigh scattering (RRS) method for the detection of Cu(Ⅱ) was developed based on the formation of salicylaloxime-Cu(Ⅱ) supramolecular complex by complexation reaction. The coordination reaction of salicylaldehyde oxime with Cu(Ⅱ) led to the significant enhancement of the resonance Rayleigh scattering intensity of the solution, and the increase of the resonance Rayleigh scattering intensity was proportional to the concentration of Cu (Ⅱ). When organic compounds with different molecular structures were introduced into the system, the resonant Rayleigh scattering intensity of the solution system changed differently. The interaction between the compounds and the spatial structure of the complexes were characterized by transmission electron microscopy (TEM), Fourier real-time infrared spectroscopy (FT-IR), zeta potential and particle size. The results showed that when 2-methylimidazole was introduced, the layered texture of Cu(Ⅱ)-CH 3 COO - -H 2 PO 4 - -salicylaldoxime system changed to porous reticular spatial structure, and the RRS value increased significantly. Under the optimal conditions, in the range extending from 0.08 to 2.81 µmol/L, the equation of linear regression was Δ I = 3202 c + 10.88 ( c , µmol/L) with a correlation coefficient 0.9996, and the detection limit was estimated to be 4.23 × 10 -2 µmol/L. The method was successfully applied for the determination of Cu(Ⅱ) in tap and river water sample, suggesting its great potential toward Cu(Ⅱ) analysis.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
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