JOURNAL OF COORDINATION CHEMISTRY
·
2018
·
IF 1.703
Jiajia Lai,Xianying Duan,Hui Yang,Meilin Wei
Two proton-conductive Cu(I) complexes based on Keggin-type clusters, [Cu(debqdc)2]2[HPW12O40]·4H2O (1), and [Cu(debqdc)2]2[HPW12O40]·debqdc·4H2O (2), where debqdc is diethyl 4,4′-dicarboxy-2,2′-biquinoline, were simply synthesized at room temperature. The products were structurally characterized by elemental analyses, infrared spectroscopy, and single-crystal X-ray diffraction analyses. Single-crystal X-ray diffraction analyses revealed that both complexes crystallized in the triclinic space group P−1 and presented two three-dimensional supramolecular networks with one-dimensional hydrophilic channels via hydrogen-bonding interactions and π–π stacking interactions between the aromatic rings. In the [Cu(debqdc)2]+ ion, debqdc acts as a bidentate nitrogen donor ligand in the chelating fashion. The bulky debqdc ligand constrains the Cu(I) metal center within such a rigid environment in a tetrahedral geometry. The two complexes exhibit good proton conductivities (10−5 ~ 10−4 S cm−1) at 100 °C in the relative humidity range 35 ~ 98%. The luminescence behaviors of these complexes in the solid state at room temperature have also been investigated. Upon excitation at 285 nm, both 1 and 2 display three main emission peaks centered at 470, 520, and 568 nm, respectively.
研究领域:
材料科学
·
晶体化学
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2020
·
IF 7.333
Dandan Zhao,Haoran Tang,Hao Wang,Cheng Yang,Yongxin Li
The nanopore-based technique is a useful tool for single-molecule sensing and characterization. In this work, we have developed a new DNA-functionalized gold-modified nanopore, and analytes can induce the conformational switch of i-motif DNA formed on the inner surface of the nanopore. i-Motif DNA structure can be formed in the presence of silver ions (Ag+), which will result in the change in surface charge and structure of the nanopore tip and ion current rectification (ICR) ratio. The i-motif DNA structure on nanopore surface will be destroyed after the addition of glutathione (GSH) due to the strong interaction of Ag–S bond, which results in the recovery of surface charge, steric hindrance, and ICR ratio. This analyte-triggered conformational switch of i-motif DNA can help us deeply understand the DNA technology inside single nanopore and will benefit the possible applications in an ultrasensitive detection and biological/chemical analysis.
研究领域:
纳米技术
·
生物物理学
·
分子生物学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Zhenxing Fang,Kuang Wu,Le Wang,Da Xu,Weiwei Wang,Yuhang Lin,Xiaohui Liu,Chun Sun
Mn doped two-dimensional (2D) layered perovskites , are becoming excellent candidates as red phosphor because of their high quantum yields (QY) and enhanced stability. However, these Mn doped 2D layered perovskites can only be excited by the near UV light , which largely limits the development of perovskites. Herein, blue-excitable Mn-doped PEA 2 (Pb/Mn)(Br/I) 4 PQDs are synthesized from anion exchange surface engineering strategy. After anion exchange, orange Mn 2+ emission from exciton-to-Mn energy transfer is acquired under the excitation of 450 nm. The PEA 2 (Pb/Mn)(Br/I) 4 compounds exhibit strong luminescence with photoluminescence (PL) QY of 52%, which is comparable to most of the reported red emitting phosphors. A prototype white light-emitting diode (WLED) with good optical performance was fabricated using commercial (Sr,Ba) 2 SiO 4 :Eu phosphor and as-prepared PEA 2 (Pb/Mn)(Br/I) 4 as green and orange color converters, showing great potential in the applications of solid state lighting.
研究领域:
材料科学
·
光电
·
固态照明
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF STRUCTURAL CHEMISTRY
·
2018
·Vol. 59
·期 3
·744-747
·
IF 0.521
Sun S.-W.,Wang G.-F.
The synthesis of a novel Cu(I) complex with V-shaped bidentate ligands {[Cu(BIPMO)]×[CuBr 2 ]} n where BIPMO = bis(4-(1 H -imidazol-1-yl)phenyl)methanone is reported. It is characterized by IR spectroscopy, elemental analysis, and single crystal X-ray diffraction. Copper(I) ions in the complex are in a distorted environment in which donor atoms are provided by the bromide anion and nitrogen atoms of BIPMO ligands, respectively. Infinite anion chains formed by CuX 4 (X = Br or N) polyhedra are linked by BIPMO ligands to give rise to layers. Furthermore, the layers are linked into 3D networks through weak intermolecular interactions.
研究领域:
无机化学
·
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
POLYHEDRON
·
2017
·
IF 1.926
Ling-Dong Chen,Lin-Xia Zhou,Yue-Qing Zheng,Hong-Lin Zhu
Two new supramolecular complexes [Ag 2 (MA) 2 (2-nbd)]·2.5H 2 O ( 1 ) and [Ag 2 (MA) 2 (3-npa)]·2H 2 O ( 2 ) (2-H 2 nbd = 2-nitroterephthalic acid; MA = melamine; 3-H 2 npa = 3-nitrophthalic acid) have been synthesized under ultrasound conditions and characterized by infrared spectra (IR), thermogravimetric analysis (TGA), elemental analyses (EA) and X-ray diffraction (XRD). Complex 1 exhibits 2D framework through the bridging of carboxylic acid ligand and melamine ligand. Complex 2 presents a binuclear silver structural unit, which was further construct to three-dimension structure via hydrogen-bond interaction. The photocatalytic performance and photoluminescent properties of them were also investigated. And the results show that complex 1 and 2 exhibited good photocatalytic activity towards the degradation of Rhodamine B (RhB) and Methylene Blue (MB) under visible light irradiation. Moreover, it is verified that the degradation rate fits the first-order kinetics.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Bowen Shi,Zirui Yin,Xiaodan Tang,Hongmei Yu,Shuanping Cui,Wei Chen
A dual-emission ratio fluorescence probe (NL-CDs/Cu–Cy–I) was fabricated via an electrostatic self-assembly method. NL-CDs served as the reference signal (Em = 433 nm), remaining insensitive to amoxicillin, while Cu–Cy–I acted as the response signal (Em = 601 nm), exhibiting varying degrees of fluorescence quenching with amoxicillin concentration changes. This established a fluorescence sensing platform leveraging internal filtration and static quenching synergistically, ensuring high specificity. Compared to the single-signal Cu–Cy–I fluorescence probe, the detection range expanded from 0.5–15 μmol L−1 to 0.2–30 μmol L−1, with the detection limit decreasing from 0.12 μmol L−1 to 0.073 μmol L−1, demonstrating significant enhancements in both range and limit. The developed ratiometric fluorescent probe was effectively employed for amoxicillin monitoring in environmental water samples, urine samples, and amoxicillin capsules, achieving recovery rates of 96.5–102.9%. This underscores the accuracy and practical applicability of the NL-CDs/Cu–Cy–I ratio fluorescence probe-based fluorescence analysis method for amoxicillin detection.
研究领域:
分析化学
·
环境科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Fanxing Meng,Yanan Qin,Wenrui Zhang,Fei Chen,Li Zheng,Jun Xing,Aihemaitijiang Aihaiti,Minwei Zhang
In this study, a high-performance flexible reduced graphene oxide (rGO) paper electrode composed of silver nanoparticles (Ag NPs) for the detection of Sudan I was fabricated. Ag NPs were doped with rGO nanoheets by self-assemble and assembled into a paper electrode with layer-by-layer structure via vacuum filtration. Thanks to the highly efficient electrocatalysis of Ag NPs towards reduction of azo bond, the as-prepared hybrid paper can be used alone as a flexible sensor for the detection of Sudan I in chili powder, with the high sensitivity (22.93 μA μmol/L) and the low detection limit (41.3 nmol/L). The sensor also expressed good selectivity, repeatability, reproducibility, stability and recovery between 96.1% and 101.8% (RSD < 6%). With the advantages of low-cost and scalable production capacity, such Ag NPs/rGO functional papers can be used as flexible disposable sensors for electrochemical detection of Sudan I.
研究领域:
分析化学
·
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 39
·期 1
·e7959
·
IF 3.7
Zhuoqin Li,Minghui Ma,Zhiyin Xiao,Xiujuan Jiang,Xinlei Xu,Hailong Wang,Peter C. Ford,Xiaoming Liu
Five novel manganese (I) tricarbonyl complexes were synthesized by the reaction of Mn (CO) 5 Br with quinoline-2-carboxaldehyde and different anilines. The IR, UV, and myoglobin results indicate that these complexes can be used as photoCORMs (photo photoinduced carbon monoxide releasing molecules) activated by red light. The visible range spectra display strong charge transfer (CT) bands, the maxima of which are sensitive to the ligand substituents. Density functional theory (DFT) and time-dependent density functional theory (TDDFT) computations show that these CT transitions are admixtures of metal-to-ligand and aniline-to-quinoline charge transfers and that increasing the electron-donating ability on the aniline functionality can lead to shifts in the absorption bands of the corresponding compounds to longer wavelengths and to enhanced band intensities, thus enhancing their photoactivity. Photolysis of these complexes in aerobic solution leads to CO photodissociation followed by oxidation of the Mn(I) center to Mn(II).
研究领域:
配位化学
·
生物无机化学
·
理论计算化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 21
·6416-6426
·
IF 6.177
Binxiong Guang,Wei Zhang,Yiwei Zhang,Yahui Xiao,Yong Liu
A novel, efficient and economical process of cyclohexanol (CHOL) production based on cyclohexene esterification–hydrogenation has become a research hotspot in recent years. Wherein, hydrogenation of cyclohexyl acetate (CHA) derived from the esterification of cyclohexene with acetic acid is a crucial step. Combining the advantages of metal complexes and heterogeneous catalysts, the robust Cu(I) coordinated amino-functionalized poly(ionic liquid)s (PILs-Cu(I)) were, in this research, synthesized for use in the mild and highly selective hydrogenation of CHA to CHOL. The results of FT-IR, UV-vis, BET, XPS and SEM-EDS confirmed that the Cu(I) was dominant in the PILs-Cu(I), and was homogeneously and stably coordinated on the amino-functionalized poly(ionic liquid)s. Benefiting from that, the PILs-Cu(I) was endowed with an unprecedented performance in the mild and highly selective hydrogenation of CHA to CHOL. Specifically, 95.6% CHA conversion with 96.6% selectivity of CHOL, and 97.0% selectivity of ethanol was obtained under extremely mild conditions of 80 °C and 2 MPa H2. Furthermore, no significant activity loss was observed over the PILs-Cu(I) after recycling for at least five times, delivering excellent stability and reusability.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
Bioactive Carbohydrates and Dietary Fibre
·
2021
·
IF 0
Dongmei Wu,Xiaoliang Zheng,Weiwei Hu,Kai Zhu,Chengxiao Yu,Qiaojun He,Robert J. Linhardt,Xingqian Ye,Shiguo Chen
Pectic oligosaccharides are viewed as excellent immunomodulator, but the specific molecular weight (M w ) range required for anti-inflammatory effects remains unclear. In this study, citrus pectins was depolymerized by the ultrasound/H2O2/Vc system and the pectic mixtures was separated through the superdex 30 chromatography column . Three highly purified pectin fractions (USP1, USP2, USP3) were obtained, with the M w of 2713 g/mol, 3683 g/mol, and 7469 g/mol. All of them were RG-I pectins and USP3 contained more arabinan sidechains than USP1 and USP2. In vitro anti-inflammation assays based on LPS-induced RAW264.7 macrophages indicated that these pectins could suppress the NO release, ROS production and down-regulated the level of pro-inflammatory cytokines IL-1β, IL-6 and TNF-α in a M w -dependent manner. The inhibitory effects increased in the order of USP13KD should be effective as a prophylactic agent against inflammatory diseases in functional food.
研究领域:
食品科学
·
生物化学
·
免疫学
✓ 已验证
DOI
SYNLETT
·
2021
·Vol. 32
·期 14
·1437-1446
·
IF 2.454
Haifei Wang,Chuliang Gong,Chen Zhang,Xiaojun Zheng,Qinglin Hou,Qingxia Zhou,Guiyin Zhou,Yao Chen
In this work, we introduced a multifunctional Ag(I)/CAAA-amidphos complex catalyzed asymmetric 1,3-dipolar cycloaddition of acrylates with α-imino esters, affording a series of 2,4,5-trisubstituted endo-pyrrolidines in good yields (up to 97%) with high enantioselectivities (up to 98% ee). Meanwhile, the catalytic system was also applied in the three-component one-pot reaction of α-imino esters formed in situ under the action of N,N′-diisopropylcarbodiimide. In addition, the gram-scale reaction was realized for the formal synthesis of (+)-ibophyllidine in eight steps.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Ya-Kun Zhang,Jian-Bo Tong,Hong-Yan Zhang,Mu-Xuan Luo,Zhi-Peng Qing,Cheng-Jian Tan
Topoisomerase I (Top I) plays a pivotal role in resolving DNA supercoiling during replication and transcription, highlighting its significance as a therapeutic target in oncology. Despite the clinical efficacy of inhibitors such as Irinotecan and Topotecan, their clinical utility is hindered by the emergence of resistance mechanisms. Sophoridine, a natural alkaloid, has demonstrated promising Top I inhibitory activity, with its derivatives showing enhanced antitumor effects. In this study, the Topomer CoMFA approach was utilized to construct a validated 3D-QSAR model to explore the structure-activity relationships (SAR) of sophoridine derivatives. Based on the model's guidance, nine derivatives were designed, four of which were synthesized and subjected to biological evaluation. Computational investigations, including molecular docking, molecular dynamics simulations, and ADMET predictions, provided detailed insights into their binding interactions and drug-like properties. These findings establish a robust theoretical framework for the rational design of sophoridine-based Top I inhibitors with potential applications in cancer treatment.
研究领域:
药理学
·
计算化学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）