Canadian Journal of Chemistry最新文献_第3页

Isolation of an antimicrobial racemic phenalenone derivative from a marine-derived Penicillium sp. fungus 从海洋来源的青霉属真菌中分离出一种抗菌外消旋苯烯酮衍生物

4区化学

Canadian Journal of Chemistry Pub Date : 2023-09-29 DOI: 10.1139/cjc-2023-0100

Nicholas Morehouse, Kelsie Graham, Samantha Cox, John Johnson, Christopher Gray

引用次数: 0

Synthesis of bisindolyl diphenylene from its ketone derivatives by infrared irradiation supported on a natural clay 天然粘土支撑下红外辐射合成双吲哚基二苯酮衍生物

4区化学

Canadian Journal of Chemistry Pub Date : 2023-09-20 DOI: 10.1139/cjc-2021-0288

Ricardo Alfredo Luna Mora, Francisco Barrera-Téllez, Karina Martínez-Mayorga, José Guadalupe Rosas-Jiménez, Alejandro Martínez-Zaldívar, Adrián Ricardo Hipólito-Nájera, Javier Pérez-Flores, Hulme Ríos-Guerra

{"title":"Synthesis of <i>bis</i>indolyl diphenylene from its ketone derivatives by infrared irradiation supported on a natural clay","authors":"Ricardo Alfredo Luna Mora, Francisco Barrera-Téllez, Karina Martínez-Mayorga, José Guadalupe Rosas-Jiménez, Alejandro Martínez-Zaldívar, Adrián Ricardo Hipólito-Nájera, Javier Pérez-Flores, Hulme Ríos-Guerra","doi":"10.1139/cjc-2021-0288","DOIUrl":"https://doi.org/10.1139/cjc-2021-0288","url":null,"abstract":"We examined the near-infrared (NIR) light-induced assembly efficiency to obtain light-sensitive 3,3′-(9H-fluorene-9,9-diyl) bis(1H-indole) derivatives using natural clay as metal-free Brønsted–Löwry catalyst (bentonitic Tonsil–Actisil FF (TAFF) clay) and an adduct of aluminum (III) chloride with 9-fluorenone. Their mixtures in solventless and aprotic solvent conditions were also explored. Among all the modified reactions tested, the combined effects of TAFF natural clay with NIR light, specifically in the λ 1.1 µm spectral region, result especially efficient to achieve the formation of C–Cπ bonds between π-excessive azaheteroaromatic reagents and functionalized polycyclic aromatic hydrocarbon to give the title compound in good yields within reasonable reaction times. The reaction coordinate was obtained using quantum chemical calculations. All the reactants, products, intermediates, and transition states were obtained for four systems. Natural orbital analysis allowed us to rationalize the transformations. Overall, this approach represents a greener and equally efficient alternative for conducting C–Cπ bond construction reactions in organic chemistry, and it is especially useful for protecting photosensitive compounds from abrupt decomposition.","PeriodicalId":9420,"journal":{"name":"Canadian Journal of Chemistry","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136309260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Synthesis and Antimalarial Activity of Novel 3-Substituted Chloroquine Derivatives 新型3-取代氯喹衍生物的合成及抗疟活性研究

IF 1.1 4区化学

Canadian Journal of Chemistry Pub Date : 2023-08-29 DOI: 10.1139/cjc-2023-0062

Benita Kapuku, Fadi Baakdah, E. Georges, D. Bohle

引用次数: 0

Photocatalytic splitting of water on g-C3N4-based single-atom Pt catalysts with stable “sandwich” structure: A combined first principles and semiempirical investigation 具有稳定“三明治”结构的g- c3n4基单原子Pt催化剂光催化分解水:结合第一性原理和半经验研究

IF 1.1 4区化学

Canadian Journal of Chemistry Pub Date : 2023-08-22 DOI: 10.1139/cjc-2023-0066

Cheng Yang, Jinren Yan, Jiang Wu, Rujie Li, Qingju Liu

{"title":"Photocatalytic splitting of water on g-C3N4-based single-atom Pt catalysts with stable “sandwich” structure: A combined first principles and semiempirical investigation","authors":"Cheng Yang, Jinren Yan, Jiang Wu, Rujie Li, Qingju Liu","doi":"10.1139/cjc-2023-0066","DOIUrl":"https://doi.org/10.1139/cjc-2023-0066","url":null,"abstract":"Solar-to-hydrogen energy conversion is a promising strategy to solve environmental pollution and energy crisis by utilizing photocatalytic water splitting. In this work, a “sandwich” structure of g-C3N4-based single-atom Pt catalyst for photocatalytic water splitting is proposed and investigated using a combined first principles and semiempirical study method. The calculation results indicate that, without any cocatalyst, the photogenerated holes in the valence band of BL-g-C3N4 cannot oxidize H2O to O2, and its OER performance is not better than that of the pristine monolayer g-C3N4. Significantly, the photogenerated holes in the valence band of the \"sandwich\" structured photocatalyst g-C3N4-Pt1-g-C3N4 can oxidize H2O to O2 without any cocatalyst. That is, the OER performance of g-C3N4-Pt1-g-C3N4 is better than that of the pristine g-C3N4 and the pristine BL-g-C3N4. However, it can be found that the introduction of single Pt atom confinement in the BL-g-C3N4 cannot effectively reduce HER energy barrier or improve the hydrogen evolution kinetics of BL-g-C3N4. In other words, the introduction of the confined single Pt atom in the BL-g-C3N4 not only fails to improve HER performance of BL-g-C3N4, but deteriorates HER catalytic performance of BL-g-C3N4. These findings provide some theoretical insights for engineers to prepare photocatalysts with higher activity and stability.","PeriodicalId":9420,"journal":{"name":"Canadian Journal of Chemistry","volume":"7 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84021803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization and swelling behavior of hydrogels from N-isopropylacrylamide, N,N′-diethylacrylamide, acrylic acid, and its use for drug release N-异丙基丙烯酰胺、N,N ' -二乙基丙烯酰胺、丙烯酸水凝胶的表征和溶胀行为及其在药物释放中的应用

IF 1.1 4区化学

Canadian Journal of Chemistry Pub Date : 2023-08-21 DOI: 10.1139/cjc-2023-0019

Huynh Nguyen Anh Tuan, H. Phuong

{"title":"Characterization and swelling behavior of hydrogels from N-isopropylacrylamide, N,N′-diethylacrylamide, acrylic acid, and its use for drug release","authors":"Huynh Nguyen Anh Tuan, H. Phuong","doi":"10.1139/cjc-2023-0019","DOIUrl":"https://doi.org/10.1139/cjc-2023-0019","url":null,"abstract":"Here, a series of semi-interpenetrating polymer network (semi-IPN) hydrogels were synthesized and investigated by combining three materials such as N-isopropylacrylamide (NIPAM), N,N′-diethylacrylamide (DEA), and acrylic acid (AAc). The linear copolymer p(NIPAM-co-AAc) was introduced into DEA solution in the presence of N,N′-methylenebisacrylamide to synthesize p(NIPAM-co-AAc)/pDEA semi-IPN hydrogels using free radical polymerization. Scanning electron microscope images demonstrated the porous morphology of hydrogels with pore sizes in the range of 220–969 µm. The physicochemical properties of polymers were evaluated by various characterization techniques, including gel permeation chromatography, dynamic light scattering, differential scanning calorimetry, rheological measurement, mechanical properties, and swelling behaviors. The results indicated that the introduction of linear copolymers into conventional hydrogels has significantly improved the properties of the hydrogels. Besides, the use of NIPAM has significantly improved the thermal sensitivity of the polymers in this work. Finally, a selected semi-IPN hydrogel was evaluated for its potential for the drug release of paracetamol. The sorption of paracetamol was an exothermic process that obeyed the Freundlich isotherms, with the highest sorption of 119.57 mg/g. The paracetamol release followed the Korsmeyer–Peppas model and was consistent with the Fickian diffusion mechanism.","PeriodicalId":9420,"journal":{"name":"Canadian Journal of Chemistry","volume":"145 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86643214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of monomolecular water and bimolecular water on BrO + CH2O reaction 单分子水和双分子水对BrO + CH2O反应的影响

IF 1.1 4区化学

Canadian Journal of Chemistry Pub Date : 2023-07-31 DOI: 10.1139/cjc-2022-0237

Yunju Zhang, Yong-guo Liu, Meilian Zhao, Yuxi Sun, Shuxin Liu

{"title":"The influence of monomolecular water and bimolecular water on BrO + CH2O reaction","authors":"Yunju Zhang, Yong-guo Liu, Meilian Zhao, Yuxi Sun, Shuxin Liu","doi":"10.1139/cjc-2022-0237","DOIUrl":"https://doi.org/10.1139/cjc-2022-0237","url":null,"abstract":"The catalytic influence of water molecules on BrO + CH2O reaction was discussed through the investigation of mechanism and kinetics. The potential energy surfaces and dynamic properties of the BrO + CH2O reaction were investigated at the CCSD(T)/aug-cc-pVTZ//B3LYP/cc-pVTZ level. The reaction generates four different products, respectively, through four pathways without water and nine pathways with water. The results have shown that the generation of HCO + HOBr occupied the entire reaction without water. The rate constants were obtained by employing the KisThelP program based on the Transition State Theory with Wigner tunneling correction. This rate constants of the naked reaction are lower than that in the presence of monomolecular water and are higher than that in the presence of bimolecular water. The current calculations indicated that monomolecular water could accelerate the BrO + CH2O reaction, while bimolecular water could not accelerate the BrO + CH2O reaction. The effective rate constants (in the presence of monomolecular water and bimolecular water) are much lower than that of the naked reaction.","PeriodicalId":9420,"journal":{"name":"Canadian Journal of Chemistry","volume":"41 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85555184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxidation of Secondary Hydroperoxides via αC-H Abstraction to Form Ketones and Hydroxyl Radicals: Fluorene Autoxidation as a Model System 二级氢过氧化物通过αC-H萃取生成酮和羟基自由基的氧化:芴自氧化为模型体系

IF 1.1 4区化学

Canadian Journal of Chemistry Pub Date : 2023-07-26 DOI: 10.1139/cjc-2022-0089

Mélanie Sollin, S. Hosseininasab, J. Malenfant, Mohamed EL-akhrass, Amaia Lopez de Arbina, Alicia Montulet, M. Frenette

引用次数: 0

Arrayed and Entangled Silicon Nanowires Using Au Nanoparticle Catalysts Prepared by Pulsed Laser-induced Dewetting 用脉冲激光诱导脱湿制备金纳米颗粒催化剂制备硅纳米线

IF 1.1 4区化学

Canadian Journal of Chemistry Pub Date : 2023-07-26 DOI: 10.1139/cjc-2023-0047

Alison Joy Fulton, Yujun Shi

{"title":"Arrayed and Entangled Silicon Nanowires Using Au Nanoparticle Catalysts Prepared by Pulsed Laser-induced Dewetting","authors":"Alison Joy Fulton, Yujun Shi","doi":"10.1139/cjc-2023-0047","DOIUrl":"https://doi.org/10.1139/cjc-2023-0047","url":null,"abstract":"The use of pulsed laser-induced dewetting (PLiD) is reported as a novel approach in the fabrication of Au nanoparticle (NP) catalytic arrays for the growth of Si nanowires (NWs) by chemical vapor deposition using SiCl4in the presence of H2. On polished Si substrates, PLiD generates Au NP catalysts with long-range order and narrow size distributions. It has been shown that the monodispersed distribution of Au NPs provides consistent diameter control of the as-grown Si NWs. A systematic exploration of the Si NW synthesis time, temperature and gas flow rates illustrates a level of tunability in terms of morphology, be it arrayed or entangled Si NWs, with varying experimental parameters. An investigation of the effect of growth temperature also showed that Si NWs can be synthesized at temperatures as low as 700 ⁰C when using SiCl4 as the precursor. The use of porous Si substrates enabled direct observation of the diameter-dependent growth due to the simultaneous presence of three Au NP size distributions. Growth from the small- and medium-size Au NP catalysts occurred first, followed by that from the large-size Au NPs, which was only observed at extended times or high SiCl4 flow rates. The delayed onset of growth from the large-size Au NPs is due to the longer time to achieve Si super-saturation of larger catalyst NPs. The morphology and diameter control of the as-grown Si NWs reported in this work makes this approach potentially useful towards applications such as nanoelectronics, sensors, and LIB electrodes depending on the desired morphology.","PeriodicalId":9420,"journal":{"name":"Canadian Journal of Chemistry","volume":"35 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77078559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Introduction to the WATOC Special Issue WATOC特刊简介

IF 1.1 4区化学

Canadian Journal of Chemistry Pub Date : 2023-07-25 DOI: 10.1139/cjc-2023-0078

R. J. Boyd, Alex Brown, G. DiLabio, S. Wetmore

引用次数: 0

Synthesis, characterization, and anticancer properties of iminopyridine platinum(II) complexes containing long aliphatic chains‡ 含有长脂肪链的亚氨基吡啶铂(II)配合物的合成、表征和抗癌性质

IF 1.1 4区化学

Canadian Journal of Chemistry Pub Date : 2023-06-30 DOI: 10.1139/cjc-2023-0031

Khandra Barrett, Matthew Dupuis, Anna Crossman, SunMin Park, T. George, C. Vogels, Jillian Rourke, Jason D. Masuda, S. Westcott

{"title":"Synthesis, characterization, and anticancer properties of iminopyridine platinum(II) complexes containing long aliphatic chains‡","authors":"Khandra Barrett, Matthew Dupuis, Anna Crossman, SunMin Park, T. George, C. Vogels, Jillian Rourke, Jason D. Masuda, S. Westcott","doi":"10.1139/cjc-2023-0031","DOIUrl":"https://doi.org/10.1139/cjc-2023-0031","url":null,"abstract":"A series of iminopyridine ligands were prepared from the condensation reaction of 6-methylpyridine-2-carboxaldehyde and long chain aliphatic primary amines. Square planar platinum(II) complexes were synthesized from the reaction of [PtCl2(η2-coe)]2 (coe = cis-cyclooctene) with two equivalents of ligand. The synthesis of the platinum compounds appears to go through a 5-coordinate trigonal pyramidal species where coe remains coordinated initially but eventually dissociates to afford the 4-coordinate complexes. Ligands and platinum complexes were characterized using multi-nuclear NMR and FT-IR spectroscopies as well as an X-ray diffraction study for the platinum complex derived from n-hexylamine. The cytotoxic properties of the platinum complexes against the ovarian cancer cell line SKOV-3 using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) colorimetric method were examined. Relative cytotoxicities of the platinum complexes follow a trend of greater potency with increasing chain length against the SKOV-3 cell line, with the longest aliphatic hydrocarbon chain (C16) exhibiting anticancer effects comparable to that of cisplatin.","PeriodicalId":9420,"journal":{"name":"Canadian Journal of Chemistry","volume":"550 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77202532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0