Organic Chemistry eJournal最新文献_第4页

Synthesis and Characterization of a Novel Soluble Neohesperidin Copper (Ⅱ ) Complex Using Ion-Exchanging Resin Column 新型可溶性新橙皮苷铜(Ⅱ)配合物的离子交换树脂柱合成与表征

Organic Chemistry eJournal Pub Date : 2020-04-30 DOI: 10.2139/ssrn.3589134

Na Xia, Wenjing Wan, Huan Wang, Siming Zhu

{"title":"Synthesis and Characterization of a Novel Soluble Neohesperidin Copper (Ⅱ ) Complex Using Ion-Exchanging Resin Column","authors":"Na Xia, Wenjing Wan, Huan Wang, Siming Zhu","doi":"10.2139/ssrn.3589134","DOIUrl":"https://doi.org/10.2139/ssrn.3589134","url":null,"abstract":"The complexation of a flavonoid with metal ions usually can better the bioactivity or bioavailability of the flavonoid. A new method was designed and developed to synthesize a new neohesperidin-Cu(II) complex using ion-exchanging resin column. On the column, the integration of separation or desorption of neohesperidin on resins and the reaction of neohesperidin with Copper(II) was realized. Possible synthesis mechanism was discussed using UV-Vis, FT-IR, XRD, TGA and the Hard and Soft Acid and Base Principle. In addition, the inhibition of the complex on the tyrosinase activity was also studied. Results shows that Resin D296, as a macro-porous strong basic anion-exchange resin, can enrich neo-hesperidin effectively, and the saturated adsorption capacity is 2.38 mg per mL wet resins. During the integration method, the CuCl2 concentration should be 0.2 mol/L. Possible mechanism for the integration lies on three factors. One is the exchange between NH anions and Cl- ; the second is that neohesperidin as a soft base can form a stable complex with Cu2+ a borderline acid through the stoichiometric ratio of 2:1(neohesperidin:Cu2+ ) ; the third is that the “embedding effect” of neohesperidin on Cu2+ and the “concentrate effect of Cu2+ on neohesperidin, and the aforesaid two effects helps to better the neohesperidin solubility through the complexation process, since the glycosyl part is outside neohesperidin because of the “concentrate effect” of Cu2+ for hydrophobic aglycone part. The complex of neohesperidin-copper(II) can inhibit the tyrosinase activity，and our research findings can offer a reference to the value-added development of effective ingredients in plants.","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"214 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75582644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nucleation Intensification in the Ice Cream Production 冰淇淋生产中的成核强化

Organic Chemistry eJournal Pub Date : 2020-04-24 DOI: 10.15587/1729-4061.2020.198441

A. Tvorogova, T. Shobanova, A. Landikhovskaya, P. Sitnikova, I. Gurskiy

{"title":"Nucleation Intensification in the Ice Cream Production","authors":"A. Tvorogova, T. Shobanova, A. Landikhovskaya, P. Sitnikova, I. Gurskiy","doi":"10.15587/1729-4061.2020.198441","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.198441","url":null,"abstract":"In ice cream production, the dispersal of ice crystals ‒ an important organoleptic indicator ‒ depends on the number of water crystallization centers at the first stage of freezing (nucleation). At the subsequent freezing, the remaining water crystallizes at existing centers. This paper reports the results of studying the substantiation of nucleation intensification by increasing the rate of freezing in nitrogen and by employing a germ-forming effect, predetermined by the presence of particles. The nucleation initiators considered are suspended particles of the fat phase and a partially soluble stabilizer (microcrystalline cellulose) and coagulated protein. It has been established that the largest dispersal of ice crystals was achieved when the freezing rate increased while using nitrogen. At a fraction of the frozen water of 40‒50 % under immersion freezing and subsequent aerial pre-freezing the size of ice crystals over 6-month-storage did not exceed 37 µm. It has been shown that the fatty particles were an additional factor in initiating the nucleation at immersion and contact-free freezing in a freezer. We have established a positive effect of the suspended particles of microcrystalline cellulose and coagulated protein on the dispersal of ice crystals in the process of ice cream production and over a 6-month-storage. The average diameter of ice crystals during storage when using microcrystalline cellulose in the creamy ice cream was 39 µm, in fermented milk ice cream containing yogurt – 32‒34 µm. The study results make it possible to define new directions in the intensification of nucleation, based on the principles of the increased rate of freezing and the intensification of nucleation using additional crystallization centers","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81597241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparative Study of Chemical -Composition and Physico-Chemical Characteristics of Thymus Vulgaris's Essential Oil Harvested from Deraa-Tafilalet's Region (Morocco) with Previous Studies 摩洛哥Deraa-Tafilalet地区麝香精油化学成分及理化特性的比较研究

Organic Chemistry eJournal Pub Date : 2020-04-13 DOI: 10.2139/ssrn.3574468

Elgamouz Sabah, Bouzekri Omayma, mosatafa Elidrissi, Aziz Bouymajane, M. Choukrad

引用次数: 1

Evaluation of Nitrogen (Urea) on Zea mays L. under Balkh Province Climate 巴尔赫省气候条件下玉米氮素(尿素)的评价

Organic Chemistry eJournal Pub Date : 2020-01-08 DOI: 10.53894/ijirss.v3i1.26

N. Habibi, Friba Sikandari

引用次数: 0

Synthesis, Crystal Structure, Luminescence Sensing of a Zn(II) Coordination Polymer Based on 2,5-Dihydroxyterephthalic Acid and 2,2'-Bipyridine 基于2,5-二羟基对苯二甲酸和2,2′-联吡啶的Zn(II)配位聚合物的合成、晶体结构和发光传感

Organic Chemistry eJournal Pub Date : 2020-01-01 DOI: 10.2139/ssrn.3686519

Linan Dun, Baosheng Zhang, Jiajun Wang, He Wang, Xue Chen, Chuanbi Li

{"title":"Synthesis, Crystal Structure, Luminescence Sensing of a Zn(II) Coordination Polymer Based on 2,5-Dihydroxyterephthalic Acid and 2,2'-Bipyridine","authors":"Linan Dun, Baosheng Zhang, Jiajun Wang, He Wang, Xue Chen, Chuanbi Li","doi":"10.2139/ssrn.3686519","DOIUrl":"https://doi.org/10.2139/ssrn.3686519","url":null,"abstract":"Abstract: A new coordination polymer, namely, [Zn(Bpy)(DHTA)0.5]n (DHTA = 2,5-dihydroxy-1,4-terephthalic acid tetra-anion, Bpy = 2,2'-bipyridine) has been synthesized under hydrothermal conditions. The structure has been determined by single crystal X-ray diffraction, thermal gravimetric analysis, infrared spectrum and luminescent properties. The [Zn(Bpy)(DHTA)0.5]n contains one Zn(II), the metal center Zn(II) is five-coordinated. Complex 1 was stable up to 380 oC, and a sharp weight loss in the temperature range 380-570 oC was observed, the residual is zinc(II) oxide (ZnO). The complex 1 exhibits an emission at 365 nm (λex = 316 nm). The photoluminescence results suggest that complex 1 has potential as a new luminescence material. The quantum chemistry calculations results indicate that the atomic net charge distribution in the complex 1 shows obvious covalent interactions between the coordinated atoms and Zn(II) ion. Meanwhile, the ΔE (ELUMO - EHOMO) value to be - 0.096 a.u. The luminescence explorations demonstrated that complex 1 exhibits highly selective and sensitive sensing for organic solvents (DMK) and metal ion (Fe3+).","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85100694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Super Bulky Bismuth(III) Imidazole Selones: Structural and Bonding Aspects 超大体积铋(III)咪唑类Selones:结构和键合方面

Organic Chemistry eJournal Pub Date : 2020-01-01 DOI: 10.2139/ssrn.3700930

M. Adinarayana, M. Nandeshwar, Katam Srinivas, P. Ganesan

引用次数: 0

Fe3O4@SiO2@D-NHCS-Tr as Efficient and Reusable Catalyst for the Synthesis of indol-3-yl-4H-chromene via a Multi-Component Reaction Under Solvent-Free Conditions Fe3O4@SiO2@D-NHCS-Tr在无溶剂条件下多组分反应合成吲哚-3-酰基- 4h -铬烯的高效可重复使用催化剂

Organic Chemistry eJournal Pub Date : 2020-01-01 DOI: 10.2139/ssrn.3745219

R. Baharfar, Sahar Peiman, B. Maleki

引用次数: 2

Characterization and Antimicrobial Activity of New Cobalt-Nickel-Copper (Ii) Complexes with Benzoin and 3-Amino Benzoic Acid 新型钴-镍-铜(Ii)与苯甲酸和3-氨基苯甲酸配合物的表征及抗菌活性

Organic Chemistry eJournal Pub Date : 2020-01-01 DOI: 10.2139/ssrn.3574465

S. Sarsamkar, N. S. Gramopadhye

{"title":"Characterization and Antimicrobial Activity of New Cobalt-Nickel-Copper (Ii) Complexes with Benzoin and 3-Amino Benzoic Acid","authors":"S. Sarsamkar, N. S. Gramopadhye","doi":"10.2139/ssrn.3574465","DOIUrl":"https://doi.org/10.2139/ssrn.3574465","url":null,"abstract":"Condensation of Benzoin and 3-Amino Benzoic acid yields a novel Schiff base ligand i.e. 3-(2-hydroxy-1,2-diphenylethylideneamino) benzoic acid of type HL. Also, we synthesized the [C 42 H 32 N 2 O 6 Co.2H 2 O], Ni(II) [C 42 H 32 N 2 O 6 Ni.2H 2 O] and Cu(II) [C 42 H 32 N 2 O 6 Cu.2H 2 O] metal complexes. The characterization study of the ligand and metal complexes were carried out by elemental analysis, UV-visible, IR, 1 H NMR spectroscopy, thermal studies and magnetic susceptibility measurement. On the basis of electronic spectral data and magnetic susceptibility measurement the octahedral geometry has been proposed for Co(II), Ni(II) and Cu(II) complexes. The X-ray diffraction study reveals that ligand and all the complexes are crystalline in nature and also possess orthorhombic structure. In vitro antibacterial and antifungal activities assay were performed for the ligand and metal(II) complexes. The micro-organisms Staphylococcus aureus and Pseudomonas aeruginosa and the fungi Candida albicans and Aspergillus Niger were used. Our findings are very promising in the field of clinical research as the highest antimicrobial and antifungal activity is observed for copper complexes.","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83760780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, X-Ray Characterization, Spectroscopic (Ft-Ir, Uv-Vis, EPR ) and Hirshfeld Surface Analysis of Dimer Copper(Ii)-Benzoate Complex 二聚铜(Ii)-苯甲酸酯配合物的合成、x射线表征、光谱(Ft-Ir、Uv-Vis、EPR)和Hirshfeld表面分析

Organic Chemistry eJournal Pub Date : 2020-01-01 DOI: 10.2139/ssrn.3696924

Filiz Öztürk

{"title":"Synthesis, X-Ray Characterization, Spectroscopic (Ft-Ir, Uv-Vis, EPR ) and Hirshfeld Surface Analysis of Dimer Copper(Ii)-Benzoate Complex","authors":"Filiz Öztürk","doi":"10.2139/ssrn.3696924","DOIUrl":"https://doi.org/10.2139/ssrn.3696924","url":null,"abstract":"The copper(II) complex with benzoic acid, [Cu2 (BA) 4 (BAH) 2]) (BAH: Benzoic acid) was synthesized and the original dimer complex formed by complexing copper ions with benzoic acid was investigated. The dimer complex has been characterized by spectroscopic (FT-IR, EPR, UV-Vis), structural (XRD), thermogravimetric analysis and have displayed satisfactory elemental analysis. The copper(II) compound crystallizes in the monoclinic space group P21/c, Z=4, with the unit-cell dimensions: a=10.775(5) Å, b=11.730 (5) Å, c=15.271 (4) Å, β=91.393 (4)˚. The coordination polyhedron around each copper central is described as an elongated (4+1) square pyramidal sphere. The trigonality factor (τ=(β-α)/60) value of the copper complex is 0.01 and this value expresses having slightly distorted square pyramidal environment of the Cu(II) ions coordination. Hydrogen bonds and π⋯π weak interactions form a three-dimensional supramolecular structure. The FT-IR studies of the complex were commented, focusing on the shifts in the vibrational peaks between the complex form and free benzoic acid. The powder EPR spectra of complex was investigated at liquid nitrogen temperature. As a result of EPR analysis, spin Hamiltonian parameters were obtained. In addition, zero field splitting parameters of the dimer-complex was obtained as Dobs= 0.60 cm-1 and E≈0. Thermal properties were carried out by thermogravimetric Analysis (TGA). Moreover, the intermolecular interactions have been also analyzed using Hirshfeld surface analysis.","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76859799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Additional Reaction and Mechanism of Dicyanobenzene: Formation of Charge-Assisted Hydrogen Bond Networks 二氰苯的附加反应及其机理:电荷辅助氢键网络的形成

Organic Chemistry eJournal Pub Date : 2020-01-01 DOI: 10.2139/ssrn.3715474

Jian-xiong Guo, Donglin Shang, Ruide Xue, Lixia Ling, Junping Han, Aihong Li, N. Yang, Baojun Wang, Sheng‐Di Bai

引用次数: 0