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.
金属离子与类黄酮的络合作用通常能提高类黄酮的生物活性或生物利用度。设计并建立了一种离子交换树脂柱合成新橙皮苷- cu (II)配合物的新方法。在色谱柱上实现了新橙皮苷在树脂上的分离或解吸与新橙皮苷与铜(II)的反应相结合。采用UV-Vis、FT-IR、XRD、TGA和软硬酸碱原理对可能的合成机理进行了探讨。此外，还研究了该复合物对酪氨酸酶活性的抑制作用。结果表明，树脂D296作为大孔强碱性阴离子交换树脂，能有效富集新橙皮苷，饱和吸附量为2.38 mg / mL湿树脂。积分法中CuCl2的浓度为0.2 mol/L。整合的可能机制有三个方面。一种是NH阴离子与Cl-之间的交换;二是新橙皮苷作为软碱可以与Cu2+一种边缘酸形成稳定的络合物，其化学计量比为2:1(新橙皮苷:Cu2+);三是新橙皮苷对Cu2+的“包埋效应”和Cu2+对新橙皮苷的“浓缩效应”，由于Cu2+对疏水苷元部分的“浓缩效应”，使糖基部分在新橙皮苷外，这两种作用通过络合过程有利于新橙皮苷的溶解度提高。新橙皮苷-铜(II)配合物具有抑制酪氨酸酶活性的作用，研究结果可为植物有效成分的增值开发提供参考。
{"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}
Pub Date : 2020-04-24DOI: 10.15587/1729-4061.2020.198441
A. Tvorogova, T. Shobanova, A. Landikhovskaya, P. Sitnikova, I. Gurskiy
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
{"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}
Elgamouz Sabah, Bouzekri Omayma, mosatafa Elidrissi, Aziz Bouymajane, M. Choukrad
Thymus vulgaris which is known as Thym, Zitra in Arabic it belongs to the Lamiaceae family. It is one of many wild aromatic medicinal plants, which grows naturally in Morocco. In our study we chose the one harvested from South East Morocco precisely in Deraa-Tafilalet’s region. The essential oil is obtained by Hydrodistillation using Clevenger device with an yield of 1, 3 % using CG/MS analysis that Carvacrol (45,85%) and endo-Borneol (22,46%) are the components with the highest rate. Acid and saponification index resulting indicate that Thymus vulgaris’s essential oil contains not much of free acids reason why essential oil doesn’t regroup saturated compounds.The results of antimicrobial activity of putting thymus vulgaris’s essential oil against Gram positive bacteria ( Staphylococcus aureus, Salmonella ), Gram negative bacteria ( Escherichia coli ) and Candida albicans, showed that Thymus vulgaris’s essential oil has a bactericidal activity, against all the microorganisms.
{"title":"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","authors":"Elgamouz Sabah, Bouzekri Omayma, mosatafa Elidrissi, Aziz Bouymajane, M. Choukrad","doi":"10.2139/ssrn.3574468","DOIUrl":"https://doi.org/10.2139/ssrn.3574468","url":null,"abstract":"Thymus vulgaris which is known as Thym, Zitra in Arabic it belongs to the Lamiaceae family. It is one of many wild aromatic medicinal plants, which grows naturally in Morocco. In our study we chose the one harvested from South East Morocco precisely in Deraa-Tafilalet’s region. The essential oil is obtained by Hydrodistillation using Clevenger device with an yield of 1, 3 % using CG/MS analysis that Carvacrol (45,85%) and endo-Borneol (22,46%) are the components with the highest rate. Acid and saponification index resulting indicate that Thymus vulgaris’s essential oil contains not much of free acids reason why essential oil doesn’t regroup saturated compounds.The results of antimicrobial activity of putting thymus vulgaris’s essential oil against Gram positive bacteria ( Staphylococcus aureus, Salmonella ), Gram negative bacteria ( Escherichia coli ) and Candida albicans, showed that Thymus vulgaris’s essential oil has a bactericidal activity, against all the microorganisms.","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90825208","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}
An experiment was conducted to evaluate effect of urea fertilizer on yield and yield components of Zea mays L. Using Randomized Complete Block Design (RCBD) split plots in three replications in agricultural research farm of Balkh University by 2019. Doses of urea used in this experiment were 0, 80, 160 and 240 kg ha-1, respectively. It has been found that amount of nitrogen fertilizer (urea) had significant effect on yield of maize at p<0.05. The higher level of nitrogen caused the higher grain yield, number of kernels per ear, the number of grains per ear row, ear diameter, cob length, grain per plant and plant height. As a result 7.76 ton ha-1 was recorded as high yield while 240 kg ha-1 urea was used, and 5.12 ton ha-1 was recorded as low yield in treatment one with 0 kg ha-1 of nitrogen fertilizer. Finally, as a result using 240 kg ha-1 nitrogen fertilizer is recommended.
在Balkh大学农业研究农场，采用随机完全区组设计(RCBD)分3个重复试验，研究了尿素施肥对玉米产量及产量构成因素的影响。试验尿素用量分别为0、80、160和240 kg ha-1。氮肥(尿素)用量对玉米产量有显著影响(p<0.05)。施氮水平越高，籽粒产量、穗粒数、穗行粒数、穗径、穗轴长、单株粒数和株高越高。结果表明，施氮肥240 kg hm -1时高产7.76 t hm -1，施氮肥0 kg hm -1时低产5.12 t hm -1。结果表明，建议施用240 kg hm -1氮肥。
{"title":"Evaluation of Nitrogen (Urea) on Zea mays L. under Balkh Province Climate","authors":"N. Habibi, Friba Sikandari","doi":"10.53894/ijirss.v3i1.26","DOIUrl":"https://doi.org/10.53894/ijirss.v3i1.26","url":null,"abstract":"An experiment was conducted to evaluate effect of urea fertilizer on yield and yield components of Zea mays L. Using Randomized Complete Block Design (RCBD) split plots in three replications in agricultural research farm of Balkh University by 2019. Doses of urea used in this experiment were 0, 80, 160 and 240 kg ha-1, respectively. It has been found that amount of nitrogen fertilizer (urea) had significant effect on yield of maize at p<0.05. The higher level of nitrogen caused the higher grain yield, number of kernels per ear, the number of grains per ear row, ear diameter, cob length, grain per plant and plant height. As a result 7.76 ton ha-1 was recorded as high yield while 240 kg ha-1 urea was used, and 5.12 ton ha-1 was recorded as low yield in treatment one with 0 kg ha-1 of nitrogen fertilizer. Finally, as a result using 240 kg ha-1 nitrogen fertilizer is recommended.","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84299449","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}
Linan Dun, Baosheng Zhang, Jiajun Wang, He Wang, Xue Chen, Chuanbi Li
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+).
{"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}
M. Adinarayana, M. Nandeshwar, Katam Srinivas, P. Ganesan
Treatment of BiBr 3 with super bulky [(IPaul)Se] ( L 1 ) ([(IPaul)Se] = 1,3-bis(2,4-methyl-6-diphenyl phenyl)imidazole selone) or IPr*Se ( L 2 ) (IPr*Se = 1,3-bis(2,6-diphenylmethylphenyl)imidazole selone) in toluene afforded the dinuclear complex [( L 1 )BiBr 2 ( µ -Br)] 2 ( 1 ) and mononuclear complex [( L 2 )BiBr 3 ] ( 2 ), whose structures have been determined by an X-ray crystallographic study. The products were characterized by a combination of 1 H NMR and 13 C NMR spectroscopy. The thermal stability of 1 and 2 was compared using TGA. These steric and electronic factors controlled super bulky ligand systems allow for the first structural isolation of a novel super bulky dinuclear complex 1 with edge shard octahedral geometry and mononuclear super bulky complex 2 with mono capped seesaw geometry. The sterically more crowded complex 2 showed the long Bi-Se bond distance (3.192(3) Å) compared to 1 (2.902(5) Å).
{"title":"Super Bulky Bismuth(III) Imidazole Selones: Structural and Bonding Aspects","authors":"M. Adinarayana, M. Nandeshwar, Katam Srinivas, P. Ganesan","doi":"10.2139/ssrn.3700930","DOIUrl":"https://doi.org/10.2139/ssrn.3700930","url":null,"abstract":"Treatment of BiBr 3 with super bulky [(IPaul)Se] ( L 1 ) ([(IPaul)Se] = 1,3-bis(2,4-methyl-6-diphenyl phenyl)imidazole selone) or IPr*Se ( L 2 ) (IPr*Se = 1,3-bis(2,6-diphenylmethylphenyl)imidazole selone) in toluene afforded the dinuclear complex [( L 1 )BiBr 2 ( µ -Br)] 2 ( 1 ) and mononuclear complex [( L 2 )BiBr 3 ] ( 2 ), whose structures have been determined by an X-ray crystallographic study. The products were characterized by a combination of 1 H NMR and 13 C NMR spectroscopy. The thermal stability of 1 and 2 was compared using TGA. These steric and electronic factors controlled super bulky ligand systems allow for the first structural isolation of a novel super bulky dinuclear complex 1 with edge shard octahedral geometry and mononuclear super bulky complex 2 with mono capped seesaw geometry. The sterically more crowded complex 2 showed the long Bi-Se bond distance (3.192(3) Å) compared to 1 (2.902(5) Å).","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90669949","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}
Fe 3 O 4 @SiO 2 @D-NHCS-Tr was used as an efficient catalyst in the three-component reaction between indole derivatives , salicylaldehyde and active methylene compounds under solvent-free conditions to the synthesis of indol-3-yl-4 H -chromene derivatives. The features of this method include the green conditions of the reaction, easy separation, eco-friendly and cost-effectiveness of the catalyst, and high yield in short reaction times
在无溶剂条件下，以fe3o4 @ sio2 @D-NHCS-Tr为有效催化剂，在吲哚衍生物、水杨醛和活性亚甲基化合物的三组分反应中合成了吲哚-3-yl-4 H -铬衍生物。该方法具有反应条件绿色、分离容易、催化剂生态友好、成本效益高、反应时间短、产率高等特点
{"title":"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","authors":"R. Baharfar, Sahar Peiman, B. Maleki","doi":"10.2139/ssrn.3745219","DOIUrl":"https://doi.org/10.2139/ssrn.3745219","url":null,"abstract":"Fe 3 O 4 @SiO 2 @D-NHCS-Tr was used as an efficient catalyst in the three-component reaction between indole derivatives , salicylaldehyde and active methylene compounds under solvent-free conditions to the synthesis of indol-3-yl-4 H -chromene derivatives. The features of this method include the green conditions of the reaction, easy separation, eco-friendly and cost-effectiveness of the catalyst, and high yield in short reaction times","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85390150","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}
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.
苯甲酸与3-氨基苯甲酸缩合得到一种新型希夫碱配体，即HL型3-(2-羟基-1,2-二苯乙基氨基)苯甲酸。此外，我们还合成了[c42h32n2o co . 2h2o]、Ni(II) [c42h32n2o co . 2h2o]和Cu(II) [c42h32n2o co . 2h2o]金属配合物。通过元素分析、紫外可见光谱、红外光谱、核磁共振1 H谱、热学研究和磁化率测试对配体和金属配合物进行了表征。在电子光谱数据和磁化率测量的基础上，提出了Co(II)、Ni(II)和Cu(II)配合物的八面体结构。x射线衍射研究表明，配体和所有配合物均为结晶性质，并具有正交结构。对配体和金属(II)配合物进行了体外抗菌和抗真菌活性测定。微生物为金黄色葡萄球菌和铜绿假单胞菌，真菌为白色念珠菌和黑曲霉。我们的发现在临床研究领域非常有前景，因为铜配合物具有最高的抗菌和抗真菌活性。
{"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}
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.
{"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}
Jian-xiong Guo, Donglin Shang, Ruide Xue, Lixia Ling, Junping Han, Aihong Li, N. Yang, Baojun Wang, Sheng‐Di Bai
The interaction of LiN(SiMe 3 ) 2 with one equivalent of 1,3- or 1,4-dicyanobenzene followed by the addition of one equivalent of chlorodiphenylphosphine and oxidation by hydrogen peroxide gave charge-assisted hydrogen bond supramolecular polymeric structure compounds of the general formula [ArC(NH 2 ) 2 ] + [Ph 2 PO 2 ] - (Ar = 3-cyanophenyl for 1 , 4-cyanophenyl for 2 ). These compounds, which are composed of a featured type of synthon, show the typical solid-state and film fluorescence. When the above reactions were carried out with half of an equivalent of 1,3-dicyanobenzene, compound 1 and ammonium diphenylphosphinate were produced; with half of an equivalent of 1,4-dicyanobenzene, compound 3 was obtained. A mechanism for the formation of compounds 1-3 was proposed. Results of DFT calculations suggested that the nucleophilic addition reaction to the second cyano group of the dicyanobenzene was a HOMO-controlled process.
LiN(sime3) 2与1个等价物1,3-或1,4-二苯苯相互作用，然后加入1个等价物氯二苯基膦，并被过氧化氢氧化，得到了通式[ArC(nh2) 2] + [Ph 2 PO 2]的电荷辅助氢键超分子聚合物结构化合物(对于1,4-氰苯基，对于2,Ar = 3-氰苯基)。这些化合物由一种特殊类型的合成子组成，表现出典型的固态和薄膜荧光。用一半等量的1,3-二氨基苯进行上述反应，得到化合物1和二苯基膦酸铵;以1,4-二氨基苯的一半当量，得到化合物3。提出了化合物1-3的形成机理。DFT计算结果表明，对二氰苯的第二氰基的亲核加成反应是一个homo控制的过程。
{"title":"Additional Reaction and Mechanism of Dicyanobenzene: Formation of Charge-Assisted Hydrogen Bond Networks","authors":"Jian-xiong Guo, Donglin Shang, Ruide Xue, Lixia Ling, Junping Han, Aihong Li, N. Yang, Baojun Wang, Sheng‐Di Bai","doi":"10.2139/ssrn.3715474","DOIUrl":"https://doi.org/10.2139/ssrn.3715474","url":null,"abstract":"The interaction of LiN(SiMe 3 ) 2 with one equivalent of 1,3- or 1,4-dicyanobenzene followed by the addition of one equivalent of chlorodiphenylphosphine and oxidation by hydrogen peroxide gave charge-assisted hydrogen bond supramolecular polymeric structure compounds of the general formula [ArC(NH 2 ) 2 ] + [Ph 2 PO 2 ] - (Ar = 3-cyanophenyl for 1 , 4-cyanophenyl for 2 ). These compounds, which are composed of a featured type of synthon, show the typical solid-state and film fluorescence. When the above reactions were carried out with half of an equivalent of 1,3-dicyanobenzene, compound 1 and ammonium diphenylphosphinate were produced; with half of an equivalent of 1,4-dicyanobenzene, compound 3 was obtained. A mechanism for the formation of compounds 1-3 was proposed. Results of DFT calculations suggested that the nucleophilic addition reaction to the second cyano group of the dicyanobenzene was a HOMO-controlled process.","PeriodicalId":19542,"journal":{"name":"Organic Chemistry eJournal","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72812717","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}
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