Vietnam Journal of Chemistry最新文献

Total synthesis and cytotoxic evaluation of 6‐C‐prenylated flavones against MCF‐7 cells 6 - C -丙烯化黄酮对MCF - 7细胞的总合成及细胞毒性评价

Vietnam Journal of Chemistry Pub Date : 2025-12-28 DOI: 10.1002/vjch.70109

Tran Trong Binh, Nguyen Thi Thuy Luyen, Le Thi Hoa, Nguyen Khanh Hung, Nguyen Phi Linh, Cao Nhu Anh, Le Thi Phuong, Tran Le Quan, Nguyen Huy Du

引用次数: 0

Novel fire‐resistable PUF/APP/Gelatin composites from wasted PET bottles: Synthesis and processing 新型阻燃PUF/APP/明胶复合材料从废弃的PET瓶：合成和加工

Vietnam Journal of Chemistry Pub Date : 2025-11-26 DOI: 10.1002/vjch.70099

Minh Khang Le, Nhat Quang Lam, Viet Le, Hai Vo Thi

引用次数: 0

Synthesis of Cu ₂ O‐loaded perlite granules as floating catalysts for the rapid reduction of 4‐nitroaniline 负载cu2o -珍珠岩颗粒快速还原4 -硝基苯胺漂浮催化剂的合成

Vietnam Journal of Chemistry Pub Date : 2025-11-21 DOI: 10.1002/vjch.70093

Ngoc Tran, Thien An Le, An Nang Vu, Quoc Thiet Nguyen, Pei Yuin Keng, Tiến Khoa Lê, Tien Khoa Le, Tien Khoa Le

引用次数: 0

Synthesis, Characterization and Crystal Structure of Fe(III) and Ni(II) Complexes with Furan‐2,5‐Dicarbonylbis(N,N‐Diethylthiourea) 呋喃- 2,5 -二羰基双（N，N -二乙基硫脲）Fe（III）和Ni（II）配合物的合成、表征和晶体结构

Vietnam Journal of Chemistry Pub Date : 2025-03-09 DOI: 10.1002/vjch.70009

Canh Dinh Le, Minh Tuan Hoang, Hoang Phuc Nguyen, Vân Hà Nguyễn, Chien Thang Pham

引用次数: 0

Bile acids: Can the position of hydroxyl substitution influence antidiabetic potency? 胆汁酸：羟基取代的位置会影响降糖效力吗？

Vietnam Journal of Chemistry Pub Date : 2024-12-13 DOI: 10.1002/vjch.202400186

Yinan Wang, Rui Yin, Liwei Jia, Yuan Tian, Xin Meng

{"title":"Bile acids: Can the position of hydroxyl substitution influence antidiabetic potency?","authors":"Yinan Wang, Rui Yin, Liwei Jia, Yuan Tian, Xin Meng","doi":"10.1002/vjch.202400186","DOIUrl":"https://doi.org/10.1002/vjch.202400186","url":null,"abstract":"Abstract Numerous analogous compounds exist in natural products, exhibiting subtle structural variations that nonetheless result in distinct biological activities. Hyodeoxycholic acid (HDCA), ursodeoxycholic acid (UDCA), and deoxycholic acid (DCA) are analogues belonging to the steroids, and related studies have demonstrated that all three possess antidiabetic effects in reducing hyperglycemia. Diabetes mellitus is a metabolic disease with high morbidity and mortality in recent years. A thorough exploration of the mechanisms underlying compounds with potential antidiabetic properties serves as an essential prerequisite for subsequent research endeavors. However, the mechanism of action regarding them has not been fully verified, and the present study identified one of the antidiabetic mechanisms of action of bile acid analogs at the protein and molecular levels. The results suggested that structural differences due to differences in the position of the hydroxyl substituent alter the antidiabetic capacity. The application of machine learning methods for pharmacokinetic prediction contributes to a better understanding of the nature and in vivo behavior of bile acid analogs. This study endeavors to establish a basic reference and experimental foundation to contribute to the ongoing exploration of the potential role of bile acid compounds in antidiabetic mechanisms.","PeriodicalId":23525,"journal":{"name":"Vietnam Journal of Chemistry","volume":"63 3","pages":"430-437"},"PeriodicalIF":0.0,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/vjch.202400186","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147879295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving impact strength and fracture toughness of epoxy resin through oligoester—A byproduct derived from the unsaturated polyester resin manufacturing process 利用不饱和聚酯树脂生产工艺的副产物低聚酯提高环氧树脂的冲击强度和断裂韧性

Vietnam Journal of Chemistry Pub Date : 2024-11-21 DOI: 10.1002/vjch.202400247

Anh‐Tuan Pham, Pierre–Alain Duc, Ha Thi Ha, Mai Quan Doan, Dieu Vinh Tran

{"title":"Improving impact strength and fracture toughness of epoxy resin through oligoester—A byproduct derived from the unsaturated polyester resin manufacturing process","authors":"Anh‐Tuan Pham, Pierre–Alain Duc, Ha Thi Ha, Mai Quan Doan, Dieu Vinh Tran","doi":"10.1002/vjch.202400247","DOIUrl":"https://doi.org/10.1002/vjch.202400247","url":null,"abstract":"Abstract Epoxy resin, a pivotal polymer with extensive applications, is hampered by inherent inflexibility and brittleness, limiting its potential in scenarios demanding resilience against external forces. This study addresses this limitation by introducing an innovative modification through the integration of epoxy‐oligoester (EOS), derived as a byproduct of unsaturated polyester resin synthesis. EOS, with an epoxy group content of 7.5% and an acid value of 0.25 mg KOH/g, functions as an effective internal toughening agent for epoxy resin. At 15 wt%, EOS significantly augments impact strength (67.7%) and fracture toughness (92.1%), achieved by reducing network density from 0.792 × 10 −3 to 0.678 × 10 −3 mol cm −3 , resulting in lower storage modulus ( E ′) and glass transition temperature. Additionally, the addition of 15 wt% EOS retards delamination and amplifies delamination energy. Mode I critical strain energy release rate (GIC) increases by 51.2%, from 608.1 to 911.5 J/m 2 , and Mode II critical strain energy release rate (GIP) rises by 51.7%, from 664.0 to 1007.6 J/m 2 . These findings underscore the promise of EOS‐modified epoxy in industries necessitating materials with elevated fracture toughness and superior resistance to delamination, such as transportation, maritime, and automotive sectors.","PeriodicalId":23525,"journal":{"name":"Vietnam Journal of Chemistry","volume":"63 2","pages":"338-347"},"PeriodicalIF":0.0,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/vjch.202400247","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and ammonium adsorption behavior of interpenetrating polymer networks hydrogel of chitosan‐g‐poly(acrylic acid)/bentonite and chitosan‐glutaraldehyde 壳聚糖-聚丙烯酸/膨润土和壳聚糖-戊二醛互穿聚合物网络水凝胶的制备及其对铵的吸附行为

Vietnam Journal of Chemistry Pub Date : 2024-04-29 DOI: 10.1002/vjch.202300283

Nguyen Binh Duong, Trang T. T. Quan, Phan Thị Ngọc Bích, Phạm Văn Lam

{"title":"Preparation and ammonium adsorption behavior of interpenetrating polymer networks hydrogel of chitosan‐g‐poly(acrylic acid)/bentonite and chitosan‐glutaraldehyde","authors":"Nguyen Binh Duong, Trang T. T. Quan, Phan Thị Ngọc Bích, Phạm Văn Lam","doi":"10.1002/vjch.202300283","DOIUrl":"https://doi.org/10.1002/vjch.202300283","url":null,"abstract":"Abstract In this article, new interpenetrating polymer network (IPN) hydrogel as an efficient adsorbent for ammonium was prepared by a two‐step process. First, semi‐IPN hydrogel of chitosan‐g‐poly(acrylic acid)/bentonite (CAB) and chitosan (CTS) was synthesized by grafting polymerization in the presence of exfoliated bentonite as both cross‐linking agent and nanoscale inorganic filler. Second, cross‐linking polymer network of chitosan‐glutaraldehyde (CGA) was formed by reaction of CTS with glutaraldehyde (GA). The obtained IPN hydrogel (CAB/CGA) was characterized by Fourier‐transform infrared spectroscopy, scanning electron microscopy and its swelling degree and PZC value were also measured. These results demonstrate that copolymerized graft reaction was occurred between CTS, AA and bentonite forming CAB, and CGA presented as a cross‐linker in CAB/CGA polymer network. CAB/CGA has a moderate swelling degree of 7.8. CAB/CGA exhibits high adsorption capacity and fast adsorption rate for ammonium. Adsorption process reaches equilibrium in 30 min and fits well to Langmuir adsorption model with a fairly high maximum adsorption capacity of 41.06 mg g −1 . The material has a good regeneration ability. After five times of adsorption–desorption, there was almost no decrease in ammonium adsorption capacity. Moreover, the low swelling degree leads to an improvement in material strength and a reduction of equipment cost.","PeriodicalId":23525,"journal":{"name":"Vietnam Journal of Chemistry","volume":"62 S1","pages":"179-186"},"PeriodicalIF":0.0,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/vjch.202300283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147904690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Fabrication and characterization of polyvinyl alcohol/TiO₂membrane immersed in simulated body fluid for biomedical application 生物医学用聚乙烯醇/ tio2模拟体液膜的制备与表征

Vietnam Journal of Chemistry Pub Date : 2023-12-01 DOI: 10.1002/vjch.202300015

Dien Thi My Nguyen, Khanh Do Gia Huynh, Thuy Thanh Doan Nguyen, Tan Vu Huynh, Phuong Tuyet Nguyen, Nguyen Thuy Ba Linh

{"title":"Fabrication and characterization of polyvinyl alcohol/<scp>TiO<sub>2</sub></scp>membrane immersed in simulated body fluid for biomedical application","authors":"Dien Thi My Nguyen, Khanh Do Gia Huynh, Thuy Thanh Doan Nguyen, Tan Vu Huynh, Phuong Tuyet Nguyen, Nguyen Thuy Ba Linh","doi":"10.1002/vjch.202300015","DOIUrl":"https://doi.org/10.1002/vjch.202300015","url":null,"abstract":"Abstract In this study, we synthesized hydroxyapatite (HA) on polyvinyl alcohol/TiO 2 (PVA/TiO 2 ) in which TiO 2 was prepared by the sol‐gel method. HA was formed by immersing the membrane in the simulated body fluid (SBF) solution. We improved the mechanical strength of the membranes by adding glutaraldehyde (GA) combining with heat treatment to cross‐link the polymer network. In addition, the composition of TiO 2 crystalline phase, TiO 2 content in each membrane, and the duration of membrane immersion in SBF solution were investigated. The morphological structures of hydroxyapatite/polyvinyl alcohol/TiO 2 (HA/PVA/TiO 2 ) membranes were characterized by IR, SEM, and XRD. We confirmed that the HA formation depended on the TiO 2 content and phase composition (rutile or anatase). Membranes containing TiO 2 rutile‐phase showed more pronounced HA formation than membranes containing TiO 2 anatase‐phase. The appearance of HA also depended on SBF immersion duration. Membranes soaked for 3 weeks showed significantly more HA formation than membranes soaked for 1 and 2 weeks. Furthermore, the number of cells in membranes soaked for 3 weeks was clearly higher than in other membranes. Finally, HA/PVA/TiO 2 membranes containing 25 wt.% of TiO 2 rutile‐phase are biocompatible based on the number of viable cells and thus have the potential for biomedical application.","PeriodicalId":23525,"journal":{"name":"Vietnam Journal of Chemistry","volume":"61 6","pages":"741-754"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/vjch.202300015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147887459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Fabrication and characterization of PMMA/ZrO₂ nanocomposite 3D printing filaments PMMA/ZrO2纳米复合材料3D打印长丝的制备与表征

Vietnam Journal of Chemistry Pub Date : 2023-07-19 DOI: 10.1002/vjch.202200185

Nguyen Thi Dieu Linh, Khuc Duong Huy, Nguyen Thi Kim Dung, Ngo Xuan Luong, Thái Hoàng, Do Quang Tham

{"title":"Fabrication and characterization of <scp>PMMA</scp>/<scp>ZrO<sub>2</sub></scp> nanocomposite <scp>3D</scp> printing filaments","authors":"Nguyen Thi Dieu Linh, Khuc Duong Huy, Nguyen Thi Kim Dung, Ngo Xuan Luong, Thái Hoàng, Do Quang Tham","doi":"10.1002/vjch.202200185","DOIUrl":"https://doi.org/10.1002/vjch.202200185","url":null,"abstract":"Abstract The 3D printing PMMA/ZrO 2 filaments with a diameter of 1.75 ± 0.05 mm were fabricated by using a single‐screw extruder at temperatures of four heating zones of 190, 200, 210, and 210°C. Testing samples were prepared from the extruded filaments by using a fusion deposition modeling 3D printer and a Haake MiniJet piston injection molding machine. Fourier transform infrared spectroscopy, mechanical properties, field emission scanning electron microscopy (FESEM), differential scanning calorimetry, and thermogravimetric analysis of the filaments were investigated. It was suggested the formation of physical and molecular interactions between surface hydroxyl groups of ZrO 2 nanoparticles and C‐O‐C groups of PMMA in the PMMA/ZrO 2 filaments. FESEM images of the filaments indicated the good dispersion of ZrO 2 nanoparticles in the PMMA matrix, nevertheless, there was still the formation of clusters of ZrO 2 nanoparticles in the nanocomposite filaments. The incorporation of nano ZrO 2 increased the thermal properties, bending, and tensile moduli of PMMA. The mechanical properties of the 3D‐printed samples were lower than those of the molded samples. However, the bending strength of the 3D‐printed samples was much higher than 50 MPa, bending modulus was much higher than 1800 MPa, as required for acrylic bone cement (in ISO 5833:2002).","PeriodicalId":23525,"journal":{"name":"Vietnam Journal of Chemistry","volume":"61 4","pages":"461-469"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/vjch.202200185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147920909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Copper promoted, directed sulfenylation and phenoxylation of benzamide C−H bonds 铜促进了苯甲酰胺C - H键的定向亚砜化和苯氧基化

Vietnam Journal of Chemistry Pub Date : 2023-03-17 DOI: 10.1002/vjch.202200119

Nguyễn Vân Hà, Nguyen Thi Thu Ha, Ong Ngoc Khanh, Dinh Phuong, Ho Thanh Nhat, Tung T. Nguyen

引用次数: 3