NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 25
·11903-11911
·
IF 3.3
Tingzhong Li,Qinglu Yu,Zhuang Du,Jie Gao,Dong LU,Rui Liang,Guoxing Sun
A convenient and mild method for preparing multicolor carbon dots (CDs) using the solvothermal process and extraction has been developed. After doping CDs as the cross-linking agent into γ-(2,3-epoxypropoxy)propytrimethoxysilane solution, orange, yellow, and blue emitting powders were fabricated, which effectively avoid aggregation-caused quenching and emit bright luminescence. By introducing oily chain segments, the interaction between the fluorescent powder and fingerprint residue is improved as well as the imaging ability of latent fingerprints. Level 1–3 features can be extracted using the CD powder developed fingerprints. Additionally, seven substrates with different surface appearance, colours, and interference were chosen to deposit on fingerprints, in which all the substrates have a good combination with the CD powder and showed excellent contrast and visibility. Notably, the as-prepared CDs can be used for acetate ion (AcO−) sensing. The CDs exhibit an efficient response to AcO− by an ‘‘on–off’’ switching strategy. As a sensing probe, the CDs exhibit a wide concentration range (3 × 10−7–3 × 10−3 M) of response to AcO− with a low fluorescence response threshold (0.3 μM).
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Qing-Ru Liu,Xian-Li Lin,Zhen-Ming Lu,Li-Juan Chai,Song-Tao Wang,Jin-Song Shi,Su-Yi Zhang,Cai-Hong Shen,Xiao-Juan Zhang,Zheng-Hong Xu
Long-chain fatty acids (LCFAs) are commonly presented in Baijiu, but their influence on flavor is ambiguous. The interaction between LCFAs and volatiles was systematically investigated in terms of chemometrics, sensory, and chemical-physical perceptions. The static-headspace-gas-chromatography-mass-spectrometry results demonstrated LCFAs suppressed the volatilizations of most volatiles. According to Phase-ratio-variation analysis, partition coefficients of ethyl acetate (EA) and ethyl hexanoate (EH) decreased 4%–31% and 27%–74%, while those of ethyl butyrate (EB) increased. Calculated by molecular dynamic simulation, the attractive intermolecular forces related to EA/EH increased with oleic acid (OA) addition, while those related to EB decreased. Sensory evaluation confirmed the olfactory threshold of EA and EH increased by 2.4 and 2.7 times respectively, but the threshold of EB decreased from 0.36 to 0.05 mg/L in the presence of OA. Overall, LCFAs altered the intermolecular interaction forces related to esters and ethanol, subsequently affecting the volatile profile and modifying Baijiu flavor's sensory perception.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 27
·1-17
·
IF 2.8
Xie Wang,Li Xiaodong,Zhang Mu,Zhu Qi,Sun Xudong
Conductive nickel patterns of conventional electronic devices prepared by traditional methods usually need expensive specialized equipment which has low flexibility in pattern customization, limiting the application of patterning on large area flexible substrates. Metal-organic decomposition (MOD) ink is the core of printing electronic technology. A low temperature nickel ink is formulated via the complexation reaction between nickel formate and ethanolamine with the addition of a formic acid additive. It is found that formaldehyde provides sufficient reducibility in the decomposition process and lowers the thermal decomposition of the ink by properly adjusting the amount of the ethanolamine ligand and formic acid additive. A possible reduction mechanism of ethanolamine and formic acid is proposed. The nickel film fabricated on a PI substrate presents a compact microstructure with a resistivity of 102.4 µΩ·cm after sintering at 250 °C. A series of lines with compact structure and with average relative width deviation of 5.4% are successfully printed under suitable resolutions. A functional planar micro-supercapacitor was fabricated by electrodepositing MnO 2 on the printed interdigital Ni electrode, which indicates that the Ni MOD ink is promising for ink jet printing and electronics applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Ruizheng Xu,Guiyu Wei,Zhemin Xie,Sijie Diao,Jianfeng Wen,Tao Tang,Li Jiang,Ming Li,Guanghui Hu
Increasing the efficiency of charge transfer and separation efficiency of photogenerated carriers are still the main challenges in the field of semiconductor-based photocatalysts. Herein, we synthesized g-C 3 N 4 @V 2 C MXene photocatalyst by modifying g-C 3 N 4 using V 2 C MXene. The prepared photocatalyst exhibited outstanding photocatalytic performance under visible light. The degradation efficiency of methyl orange by g-C 3 N 4 @V 2 C MXene photocatalyst was as high as 94.5%, which is 1.56 times higher than that by g-C 3 N 4 . This was attributed to the V 2 C MXene inhibiting the rapid recombination of photogenerated carriers and facilitating rapid transfer of photogenerated electrons (e − ) from g-C 3 N 4 to MXene. Moreover, g-C 3 N 4 @V 2 C MXene photocatalyst showed good cycling stability. The photocatalytic performance was higher than 85% after three cycles. Experiments to capture free radicals revealed that superoxide radicals (·O 2 − ) are the main contributors to the photocatalytic activity. Thus, the proposed g-C 3 N 4 @V 2 C MXene photocatalyst is a promising visible-light catalyst.
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PEST MANAGEMENT SCIENCE
·
2023
·
IF 4.1
Jingsheng Zhang,Yanwei Xia,Jiayong Liang,Changlu Wang,Hualong Qiu,Yurong He,Tao Ma,Lei Wang,Desen Wang
BACKGROUND The bites and blood sucking of bed bugs ( Cimex spp.) (Hemiptera: Cimicidae) pose a serious threat to human physical and mental health. Application of an effective repellent can prevent or reduce bed bug bites. Previous studies on repellent screening mainly focused on Cimex lectularius L. In this study, we investigated the repellent effect of two safe food additives, ethyl anthranilate (EA) and butyl anthranilate (BA), against Cimex hemipterus (F.), and also explored the role of antennae and mouthparts on C. hemipterus perception of repellents. RESULTS Both EA and BA had a strong repellent effect against tropical bed bugs and their repellency was similar or lower than that of N , N -diethyl-3-methyl benzoyl amide, depending on whether or not a CO 2 source was present. EA had higher repellency than BA and exhibited repellency to C. hemipterus for 3 days when a CO 2 source was present. C. hemipterus avoided resting on 20% EA- and BA-treated harborages. Applying 20% EA and BA on rabbit skin significantly reduced the blood intake of C. hemipterus within 2 h. C. hemipterus could perceive EA and BA after their antennae or mouthparts or both antennae and mouthparts were removed. CONCLUSION Both EA and BA had strong repellency against C. hemipterus , with EA being more repellent. Ablation of antennae and mouthparts did not affect the perception of EA and BA by C. hemipterus . © 2023 Society of Chemical Industry.
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CHEMOSPHERE
·
2023
·
IF 8.8
Shuo Lin,Juan Mao,Jian Xiong,Yuhang Tong,Xiejuan Lu,Tao Zhou,Xiaohui Wu
Rhenium , a rare and critical metal, existing in the industrial wastewater has been aroused extensive interests recently, due to its environmental and resource issues. Chitosan, an easily available, low-cost and eco-friendly biopolymer , was prepared and modified by grafting primary, secondary, tertiary and quaternary amino groups, respectively. Adsorption behaviors and interactions between ReO 4 − and these four types of aminated adsorbents were investigated through batch experiments, spectroscopic analysis , and theoretical computations. Chitosan modified with secondary amines showed an extremely high uptake of ReO 4 − with 742.0 mg g −1 , which was higher than any reported adsorbents so far. Furthermore, a relatively high adsorption selectivity for Re(VII), as well as the stable and facile regeneration of these aminated adsorbents revealed a promising approach for Re(VII) recovery in full-scale applications. The electrostatic attraction was illustrated to be the main adsorption mechanism by Fourier Transform Infrared Spectroscopy and X-ray Photoelectron Spectroscopy analyses. Significantly, the sub-steps of the adsorption process, encompassing the transformation of binding sites and the subsequent binding between these sites and the adsorbate, have been thoroughly investigated through the density functional theory (DFT) calculation method. This approach was firstly proposed to clearly demonstrate the differences in Re(VII) adsorption behavior onto four types of aminated adsorbents, resulting the importance of not only strong binding energy but also an appropriate binding spatial environmental for effective Re(VII) adsorption.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 35
·期 8
·e6280
·
IF 4.105
Jinzhong Guo,Zhuming Guo,Zhiyin Xiao,Jing Jin,Xiuqin Yang,Yi He,Xiaoming Liu
Four new monoiron (II) tricarbonyl complexes with the amine bound, fac -[Fe(CO) 3 I 2 (NH 2 R)] (R = Et, 1 ; n Pr, 2 ; n Bu, 3 ; n Pent, 4 ), were reported using cis -[Fe(CO) 4 I 2 ] as the precursor. All the complexes 1 – 4 were structurally confirmed by various techniques such as ultraviolet–visible (UV–vis), Fourier transform infrared (FTIR), and nuclear magnetic resonance (NMR) spectra and elemental analysis of which complexes 1 and 2 are crystallographically determined. The reaction of the precursor with alkylamines proceeded in two main parallel pathways to form both aminium salts of fac -[Fe(CO) 3 I 3 ] − and the amine-bound complexes ( 1 – 4 ). Their dominances altered with the reaction time. These complexes in DMSO undergo quick decomposition with complex 1 as the relatively most stable one ( t 1/2 = 7.3 min) although they are stable in solid status. Unlike the triiodo anion and pyridinyl analogs showing severe cytotoxicity due to the generation of iodine radical during the decomposition, no iodine radicals were detected from the fac -[Fe(CO) 3 I 2 (NH 2 R)] complexes. Therefore, the cell viability of RT112 cells was not affected by the presence of the amine-bound iron complex ( 1 ) up to 100 μmol L −1 .
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Acta Pharmaceutica Sinica B
·
2021
·
IF 11.614
Boyi Niu,Yixian Zhou,Kaixin Liao,Ting Wen,Sixian Lao,Guilan Quan,Xin Pan,Chuanbin Wu
The therapeutic efficacy of cisplatin has been restricted by drug resistance of cancers. Intracellular glutathione (GSH) detoxification of cisplatin under the catalysis of glutathione S -transferases (GST) plays important roles in the development of cisplatin resistance. Herein, a strategy of “pincer movement” based on simultaneous GSH depletion and GST inhibition is proposed to enhance cisplatin-based chemotherapy. Specifically, a redox-responsive nanomedicine based on disulfide-bridged degradable organosilica hybrid nanoparticles is developed and loaded with cisplatin and ethacrynic acid (EA), a GST inhibitor. Responding to high level of intracellular GSH, the hybrid nanoparticles can be gradually degraded due to the break of disulfide bonds, which further promotes drug release. Meanwhile, the disulfide-mediated GSH depletion and EA-induced GST inhibition cooperatively prevent cellular detoxification of cisplatin and reverse drug resistance. Moreover, the nanomedicine is integrated into microneedles for intralesional drug delivery against cisplatin-resistant melanoma. The in vivo results show that the nanomedicine-loaded microneedles can achieve significant GSH depletion, GST inhibition, and consequent tumor growth suppression. Overall, this research provides a promising strategy for the construction of new-type nanomedicines to overcome cisplatin resistance, which extends the biomedical application of organosilica hybrid nanomaterials and enables more efficient chemotherapy against drug-resistant cancers.
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Asian Journal of Pharmaceutical Sciences
·
2021
·
IF 6.598
Yuequan Wang,Cong Luo,Shuang Zhou,Xinhui Wang,Xuanbo Zhang,Shumeng Li,Shenwu Zhang,Shuo Wang,Bingjun Sun,Zhonggui He,Jin Sun
Disulfide bond-bridging strategy has been extensively utilized to construct tumor specificity-responsive aliphatic prodrug nanoparticles (PNPs) for precise cancer therapy. Yet, there is no research shedding light on the impacts of the saturation and cis-trans configuration of aliphatic tails on the self-assembly capacity of disulfide bond-linked prodrugs and the in vivo delivery fate of PNPs. Herein, five disulfide bond-linked docetaxel-fatty acid prodrugs are designed and synthesized by using stearic acid, elaidic acid, oleic acid, linoleic acid and linolenic acid as the aliphatic tails, respectively. Interestingly, the cis-trans configuration of aliphatic tails significantly influences the self-assembly features of prodrugs, and elaidic acid-linked prodrug with a trans double bond show poor self-assembly capacity. Although the aliphatic tails have almost no effect on the redox-sensitive drug release and cytotoxicity, different aliphatic tails significantly influence the chemical stability of prodrugs and the colloidal stability of PNPs, thus affecting the in vivo pharmacokinetics, biodistribution and antitumor efficacy of PNPs. Our findings illustrate how aliphatic tails affect the assembly characteristic of disulfide bond-linked aliphatic prodrugs and the in vivo delivery fate of PNPs, and thus provide theoretical basis for future development of disulfide bond-bridged aliphatic prodrugs.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Hao Ling,Qiufeng Mao,Sen Liu,Hongxia Gao,Juan Lv,Yu Mao,Zhiwu Liang
Aqueous amine-based CO2 capture is considered as the most mature and applicable CO2 capture method for post-combustion. With the CO2 capture process running for a long time, the degradation of aqueous amine-based is inevitable, and the degradation products are numerous and complicated. Therefore, the performance evaluation of aqueous amine solutions containing degradation products is crucial in both guiding the selective removal of degradation products and maintaining or reducing of the solution cyclic utilization rate. Unfortunately, a simple and effective way to increase the economic feasibility of the CO2 capture process after accumulated degradation products remains absent, and little attention has been paid to the real effect of degradation products on the CO2 capture performance in aqueous amine solutions. In this work, we propose a simple method to evaluate the performance and regeneration energy of aqueous monoethanolamine (MEA) solutions accumulating single degradation products based on the fast-bubbling reactor. Using this method, it is possible to quickly determine the key degradation products that affect the performance of aqueous MEA solutions so as to achieving clearer optimization, more direct purification, and a reduced solution cyclic utilization rate.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Chunjun Yan,Zheng Zhou
Prion diseases are fatal neurodegenerative diseases caused by the conformational transition of the cellular prion protein (PrP C ) to the abnormal pathological prion protein (PrP Sc ). In this work, the effects of ellagic acid (EA) and pentagalloylglucose (PGG) on prion protein (PrP) fibrillization were investigated. Fluorescence quenching experiments indicated that both EA and PGG could specifically interact with native human PrP with binding affinities of 1.92 × 10 5 and 2.36 × 10 5 L·mol −1 , respectively. Thioflavin-T (ThT) fluorescence assays showed that the binding of EA or PPG could effectively inhibit the nucleation and elongation of PrP fibrilization and reduce the amount of PrP fibrils generated. EA and PGG could also lead to a significant disaggregation of PrP fibrils. Circular dichroism (CD) measurements suggested that EA- or PPG-bound PrP could preserve a higher content of α-helical structures than β-sheet-rich PrP fibrils. The PrP aggregates formed in the presence of EA or PGG showed lower resistance to proteinase K (PK) digestion. Overall, the present work reported the inhibitory effect of EA and PGG on PrP fibrillization. These two natural polyphenols could be potential prodrug molecules for the prevention and treatment of prion diseases.
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LANGMUIR
·
2021
·
IF 3.882
Shiyu Wu,Yufu Yi,Shengliang Liao,Hongyan Si,Yuling Yang,Guorong Fan,Peng Wang
We described the comprehensive synthesis, characterization, and catalytic performance of a novel type of the ordered cubic Ia3̅d supermicroporous silicas by using tetraethyl orthosilicate as a silicon source and a hydroxyl-functionalized quaternary ammonium salt as a template under alkali conditions. The effects of various reaction conditions on the pore structure and morphology of the silica materials were thoroughly investigated. Our results showed that under a wide range of reaction conditions, supermicroporous silicas with a highly ordered cubic Ia3̅d structure can be produced with a large BET specific surface area of 1741 m2/g, high pore volume of 0.91 cm3/g, concentrated pore size at 19.1 Å, and crystalline morphology. After Al doping, the obtained aluminosilicates preserved a highly ordered cubic supermicroporous structure. By using the H-form aluminosilicates as catalysts, we selectively dimerized β-pinene. The catalysts exhibited an excellent catalytic activity for β-pinene dimerization with a conversion yield up to 100%. Compared with conventional mesoporous H-form Al-MCM-48 catalysts, the prepared supermicroporous catalysts exhibited superior catalytic performance due to their excellent shape-selective properties, producing the β-pinene dimer in a yield up to 72.4% with dimer/oligomer ratios in the range of 7.5–10.1. This study featured a detailed preparation and characterization of supermicroporous silica with novel microstructures and showed its utility in catalytic dimerization.
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