Molbank
·
2023
·Vol. 2023
·期 2
·M1664
·
IF 0.6
Lingsen Li,Jingjing Wang,Tianhao Gong,Kunming Liu,Juanhua Li
In this short note, we elaborate on a synthetic method for a new terpyridine Schiff base-bearing vanillin motif. The structure of the product was confirmed via1H and13C-NMR spectroscopy and FT-IR spectroscopy. Due to the peculiar coordination nature and optical property of the synthesized compound, this work presents a promising colorimetric sensing molecular compound.Keywords:terpyridine derivatives;Schiff base;condensation
研究领域:
化学
·
材料科学
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DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Yan Guo,Bin-Wen Liu,Chao-Hong Xie,Wen-Fa Chen,Ming-Xin Li,Xiao-Ming Jiang,Guo-Cong Guo
Rare-earth infrared nonlinear optical (IR NLO) compounds have garnered significant attention due to their abundant electronic structures. However, their NLO efficiency has been relatively modest, attributed to the localization of valence electron shells in rare-earth metals. Traditional design strategies for IR NLO materials have predominantly focused on MQ4 (M = metal, Q = S or Se) tetrahedra, with limited exploration of MQ6 octahedra. We introduce a novel approach to enhance NLO effects by incorporating distorted mixed anionic octahedral M(S/X)6 groups. To illustrate this strategy, we undertake structure modification and optimization of IR NLO performance using the Y–Ga–Ge–S system as an example. The synthesis of a new rare-earth chalcogenide, Y6Ga2GeS14 (1), serves as a foundation. Further halogen atom substitution yields Y6Ga4.2S13.6Cl3.4 (2), Y6Ga2.83Ge2S16.75Cl (3), and Y6Ga2.83Ge2S16.5Br1.5 (4). All compounds demonstrate remarkable NLO performance, including moderate NLO coefficients (0.17–0.70 × AgGaS2), large laser-induced damage thresholds (LIDTs) (3.78–6.19 × AgGaS2), and a broader transmission range (0.5–14.9 μm). The incremental enhancement of NLO efficiency in compounds 1–4 can be attributed to symmetry breaking induced by halogen atom substitution and increased distortion of the octahedral M(S/X)6 motifs in their structures, validating the effectiveness of our strategy. Notably, this strategy concurrently increases the band gap and LIDT, overcoming the NLO–LIDT incompatibility, being strikingly different from other reported approaches. This work provides new insights into optimizing the NLO performance of rare-earth IR NLO compounds through the modulation of octahedral motifs.
研究领域:
材料科学
·
光学
·
化学
·
物理学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Runqing Liu,Yuntian Zhao,Huaifeng Wang,Jiming Huang,Shibo Guan,Senlin Leng
A new iodate K 2 HGa(IO 3 ) 6 (CCDC: 2485176) has been synthesized via the facile hydrothermal method in the K 2 O-Ga 2 O 3 -I 2 O 5 system. The crystal structure of K 2 HGa(IO 3 ) 6 features a zero-dimensional [Ga(IO 3 ) 6 ][ 3 ] - structural building units (SBUs) with the cavities filled by the K, H cations to keep the charge balance. UV-Vis-NIR diffuse reflectance and IR spectrum were used to characterize the optical properties. TG-DSC shows that K 2 HGa(IO 3 ) 6 was no weight loss before 440°C.
研究领域:
无机化学
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材料科学
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晶体工程
·
光学材料
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Hong Gao,Lu-Lu Fu,Ming-Lan Cai,Wei Chen,Zheng-Wu Bai
In order to find a facile and practical method to synthesize amino cellulose in bulk with high regional selectivity and high degree of substitution, the reaction conditions to brominate cellulose and to reduce azido group were carefully studied and some interesting phenomena were observed. With the optimized method, 6-amino-6-deoxy cellulose could be easily prepared with very simple separation techniques. The degree of substitution of the amino group amounted to 0.97 which was determined by 1 H NMR spectrum of 6-benzamido-6-deoxy cellulose. Moreover, the amino group was evidenced to be at the C 6 of glucose unit by 1 H- 1 H COSY NMR and 1 H- 13 C HSQC NMR spectra. In addition, three cellulose 6-acetamido-6-deoxy-2,3-bis(phenylcarbamate)s were prepared from the 6-amino-6-deoxy cellulose prepared with the techniques optimized in the present study. The developed cellulose derivatives were used as chiral selectors with which chiral stationary phases (CSPs) were prepared. The CSPs exhibited enantioseparation power to some chiral compounds.
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DOI
PubMed
高影响因子
Scientific Reports
·
2018
·Vol. 8
·期 1
·1-8
·
IF 4.122
Zhu Ning,Liu Yihuan,Liu Junhua,Ling Jun,Hu Xin,Huang Weijun,Feng Weiyang,Guo Kai
A novel metal-free and protecting-group-free synthesis method to prepare telechelic thiol-functionalized polyesters is developed by employing organocatalysis. A scope of Brønsted acids, including trifluoromethanesulfonic acid ( 1 ), HCl.Et 2 O ( 2 ), diphenyl phosphate ( 3 ), γ-resorcylic acid ( 4 ) and methanesulfonic acid ( 5 ), are evaluated to promote ring-opening polymerization of ε-caprolactone with unprotected 6-mercapto-1-hexanol as the multifunctional initiator. Among them, diphenyl phosphate ( 3 ) exhibits great chemoselectivity and efficiency, which allows for simply synthesis of thiol-terminated poly(ε-caprolactone) with near-quantitative thiol fidelity, full monomer conversion, controlled molecular weight and narrow polydispersity. Kinetic study confirms living/controlled nature of the organocatalyzed chemoselective polymerizations. Density functional theory calculation illustrates that the chemoselectivity of diphenyl phosphate ( 3 ) is attributed to the stronger bifunctional activation of monomer and initiator/chain-end as well as the lower energy in hydroxyl pathway than thiol one. Moreover, series of tailor-made telechelic thiol-terminated poly(δ-valerolactone) and block copolymers are efficiently generated under mild conditions.
研究领域:
高分子化学
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材料科学
·
有机化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Muhammad Junaid,Shulin Liu,Qiang Yue,Jun Wang
Nanoplastics (NPs) interact with cooccurring chemicals and natural organic matter (NOM) in the environment, forming complexes that can change their bioavailability and interfacial toxicity in aquatic organisms . This study aims to elucidate the single and combined impacts of 21-day chronic exposure to low levels of polystyrene NPs (size 80 nm) at 1 mg/L and 6:2 chlorinated polyfluorinated ether sulfonate (Cl-PFAES or F53B) at 200 μg/L in the presence and absence of NOM (humic acid-HA and bovine serum albumin-BSA at 10 mg/L) in adult zebrafish ( Danio rerio ). Our findings through multiple bioassays, revealed that the mixture group (M), comprising of NPs, F53B, HA, and BSA, caused a higher level of toxicity compared to the single NPs (AN), single F53B (AF), and combined NPs+F53B (ANF) groups. The mixture exposure caused the highest level of vacuolization and nuclear condensation in hepatocytes, and most of the intestinal villi were fused and highly reduced in villi length and crypt depth. Further, the T-AOC levels were significantly lower ( p < 0.05), while the MDA levels in the liver and intestine were significantly higher ( p < 0.05) in the M group with downregulation of nfkbiaa , while upregulation of prkcda , csf1ra , and il1b apoptosis genes in the liver. Pairwise comparison of gut microbiota showed significantly higher ( p < 0.05) abundances of various genera in the M group, including Gordonia , Methylobacterium , Tundrisphaera , GKS98 , Pedomicrobium , Clostridium , Candidatus and Anaerobacillus , as well as higher abundance of genera including pathogenic strains, while control group showed higher abundance of probiotic genus ZOR0006 than exposed group ( p < 0.01). The transcriptomic analysis revealed highest number of DEGs in the M group (2815), followed by the AN group (506) and ANF group (206) with the activation of relaxin signaling pathway-RSP ( slc9a1 , slc9a2 ) and AMP-activated protein kinase (AMPK) pathway ( plin1 ), and suppression of the toll-like receptor (TLR) pathway ( tlr4a , tlr2 , tlr1 ), cytokine-cytokine receptor interaction (CCRI) pathway ( tnfb , il21r1 , il21 , ifng1 ), and peroxisome proliferator-activated receptors (PPAR) pathway ( pfkfb3 ). Overall, toxicity in the M group was higher, indicating that the HA and BSA elevated the interfacial impacts of NPs and F53B in adult zebrafish after chronic environmentally relevant exposure, implying the revisitation of the critical interaction of NOM with co-occurring chemicals and associated impacts
研究领域:
环境科学
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毒理学
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水生生物学
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分子生物学
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微生物学
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2015
·Vol. 33
·期 2
·185-191
·
IF 1.578
Lin Tan,Guo Wang,Nali Chen,Jianqiang Zhang,Huixia Feng
Graphene/mono-(6-amino-6-deoxy)- β -cyclodextrin multilayer films composed of graphene sheet (GS) and mono-(6-amino-6-deoxy)- β -cyclodextrin (NH 2 - β -CD) were fabricated easily by two steps. First, negatively charged graphene oxide (GO) and positively charged mono-(6-amino-6-deoxy)- β -cyclodextrin (NH 2 - β -CD) were layer-by-layer (LBL) self-assembled on glassy carbon electrode (GCE) modified with a layer of poly(diallyldimethylammonium chloride) (PDDA). Then graphene/mono-(6-amino-6-deoxy)- β -cyclodextrin (GS/NH 2 - β -CD) multilayer films were built up by electrochemical reduction of graphene oxide/mono-(6-amino-6-deoxy)- β -cyclodextrin (GO/NH 2 - β -CD). Combining the high surface area of GS and the active recognition sites on β -cyclodextrin ( β -CD), the GS/NH 2 - β -CD multilayer films show excellent electrochemical sensing performance for the detection of DA with an extraordinary broad linear range from 2.53 to 980.05 µmol·L −1 . This study offers a simple route to the controllable formation of graphene-based electrochemical sensor for the detection of DA.
研究领域:
材料科学
·
分析化学
·
生物医学工程
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DOI
高影响因子
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
·
2015
·
IF 0.961
Yihang Zhou,Weilan Xue,Zuoxiang Zeng,Wanyu Zhu,Zhelong Li
A new amine-terminated nylon 6/66/1010 (AM-6/66/1010) copolyamide hot melt adhesive with the molecular weight of 21,000–96,000 Da was synthesized and blocked with 1-hexadecylamine. The AM-6/66/1010 samples were characterized by 1H-NMR spectroscopy, differential scanning calorimetry (DSC), thermal gravimetric analysis, and gel permeation chromatography. The 1H-NMR spectroscopy demonstrated that 1-hexadecylamine functions as blocking agent in this polymerization. The DSC thermograms showed that the extra peak (peak (II)) and the melting peak (peak (I)) of AM-6/66/1010 are moving left and the glass transition temperature of AM-6/66/1010 decreases as the mole ratio αH/C (1-hexadecylamine/total carboxyl) increases. The thermal gravimetric analysis indicated that AM-6/66/1010 hot melt adhesive has a high thermal stability. The peel strength of the test specimen obtained by hot melt glutinous lining of AM-6/66/1010 or AC-6/66/1010 and fabric 6535 (65% PET, 35% cotton) was studied using T-peel tests, and the results showed that the washable and dry-cleaning resistant of AM-6/66/1010 copolyamide hot melt adhesive is better than that of carboxyl-terminated nylon 6/66/1010 (AC-6/66/1010) copolyamide hot melt adhesive.
研究领域:
高分子化学
·
材料科学
·
胶粘剂与密封材料
·
热分析
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DOI
高影响因子
Metals
·
2023
·Vol. 13
·期 4
·649
·
IF 2.9
Xiaoxi Ruan,Linlin Yang,Yan Wang,Yizhe Dong,Dake Xu,Mingxing Zhang
The corrosion of carbon steel causes dramatic economic losses each year. Since conventional corrosion prevention approaches may cause pollution problems to the environment, ecofriendly and effective corrosion approaches are desired. Microbiologically influenced corrosion inhibition (MICI) has been reported as a sustainable corrosion prevention method. This work aims to evaluate the corrosion inhibition effect of two bacterial strains,Tenacibaculum mesophilumD-6 andBacillussp. Y-6 by choosing Q235 carbon steel as a model system. Scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM) and a series of electrochemical techniques were applied to study the corrosion prevention effect. The electrochemical and pitting results indicated thatT. mesophilumD-6 displayed a better corrosion protection effect.T. mesophilumD-6 formed a denser and thicker biofilm on the Q235 surface thanBacillussp. Y-6. The maximum thickness of theT. mesophilumD-6 biofilms was 11.6 ± 0.7 μm, which is about twice as thick than that ofBacillussp. Y-6. The corrosion prevention mechanism was ascribed to the formation of biofilms as a barrier to block corrosive agents such as O2. This study provides a theoretical foundation for the application of biofilms as green and effective corrosion inhibitors for carbon steel.Keywords:Q235 carbon steel;Tenacibaculum mesophilumD-6;Bacillussp. Y-6;corrosion inhibition;biofilm formation ability
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Zhengming Xu,Shuang Liu,Huining Lai,Lijun You,Zhengang Zhao
Arbutin, salidroside, polydatin, and phlorizin are typically natural bioactive phenolic glycosides. To improve the liposolubility and bioavailability, highly liposoluble derivatives including 6′-O-lauryl arbutin, 6′-O-lauryl salidroside, 6″-O-lauryl polydatin, and 6″-O-lauryl phlorizin were efficiently synthesized by enzymatic acylation in a green solvent 2-MeTHF. Their reaction conversions reached 84.4, 99.5, 99.8, and 89.1%, respectively, when catalyzed by Lipozyme 435 at 20 mg/mL at 50 °C. As expected, the derivatives had high log P (1.66–2.37) and retained good antioxidant activity, making them potential alternatives to butylated hydroxytoluene (BHT) and tert-butyl-hydroquinone (TBHQ) in lipid systems. Then, the intestinal permeability characteristics and metabolism of phenolic glycosides and their derivatives were investigated based on Caco-2 monolayers. The permeability of polydatin and phlorizin was mainly through active transport, but that of arbutin and salidroside involved both passive diffusion and active uptake. The acylated derivatives suffered from severe CES-mediated hydrolysis but exhibited a larger transported amount than phenolic glycosides.
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PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 17
·10309-10315
·
IF 3.361
Kaitong Liu,Jian Han,Junben Huang,Zhonglei Wei,Zhihua Yang,Shilie Pan
Three new iodates SrTi(IO3)6·2H2O, (H3O)2Ti(IO3)6, and SrSn(IO3)6 have been synthesized via a facile hydrothermal method. The three compounds have zero-dimensional crystal structures composed of one [MO6]8− (M = Ti, Sn) octahedron connected with six [IO3]− trigonal pyramids. However, the particular coordination of Sr2+ cations results in distinct arrangements of lone pair electrons in an [IO3]− trigonal pyramid, which leads to large birefringences. More importantly, this work enriches the species crystal chemistry for [M(IO3)6]2− (M = Ti, Sn) clusters-containing iodates.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Jianlin Chu,Yani Tian,Qian Li,Gaofei Liu,Qi Yu,Tianyue Jiang,Bingfang He
Levan-type fructooligosaccharides (FOS) exhibit enhanced health-promoting prebiotic effects on gut microbiota. The wild type (WT) of β-fructofuranosidase Fru6 could mainly yield 6-ketose. Semirational design and mutagenesis of Fru6 were exploited to promote the transfructosylating capacity for FOS. The promising variants not only improved the formation of 6-kestose but also newly produced tetrasaccharides of 6,6-nystose and 1,6-nystose (a new type of FOS), and combinatorial mutation boosted the production of 6-kestose and tetrasaccharides (39.9 g/L 6,6-nystose and 4.6 g/L 1,6-nystose). Molecular docking and molecular dynamics (MD) simulation confirmed that the mutated positions reshaped the pocket of Fru6 to accommodate bulky 6-kestose in a reactive conformation with better accessibility for tetrasaccharides formation. Using favored conditions, the variant S165A/H357A could yield 6-kestose up to 335 g/L, and tetrasaccharides (6,6-nystose and 1,6-nystose) reached a high level of 121.1 g/L (134.5 times of the mutant S423A). The β-(2,6)-linked FOS may show the potential application for the prebiotic ingredients.
研究领域:
酶工程
·
食品科学
·
微生物学
·
生物技术
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DOI
PubMed
高影响因子
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