ChemNanoMat
·
2020
·Vol. 7
·期 3
·270-276
·
IF 3.384
Shengrui Zhang,Yang Yu,Shujue Xu,Jun Liu,Mo Liu,He Su,Yajiao Hao,Minjie Li,Sean Xiao-An Zhang
Graphical Au(I)-thiolate nanosheets have been studied as new and efficient water-dispersible UV absorbents. UV screening is very important for the prevention of skin cancer and the elongation of the lifetime of organic/polymeric stuff. To overcome the main problems of poor hydrophilicity and easy leakage of organic UV absorbents, water-dispersible Au(I)-thiolate nanosheets have been studied as a new type of UV absorbents. The results show that Au(I)-thiolate nanosheets have i) very high molar absorption coefficients (>15000 mol/L . cm), ii) comparable or superior photostability to typical organic UV absorbents, and iii) high transparency and nearly no leakage in polymer matrix. So far, no other UV absorbents have been reported to have all the above good performances simultaneously. The transparent and colorless Au(I)-thiolate/polymer thin films can effectively block UV light, and such a material will surely extend the types and the application scenarios of UV absorbents.
研究领域:
材料科学
·
化学
·
医学
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产品关联
DOI
高影响因子
LANGMUIR
·
2017
·
IF 3.833
Yumin Leng,Kai Jiang,Wentai Zhang,Yuhui Wang
Metal-mediated interlocking rings won the 2016 Nobel Prize in Chemistry. The metal-directed interlocking rings in macromolecular systems (e.g., proteins) may be similar to the form of Maxwell’s electromagnetic waves; the metal ions may shuttle among the rings in the special environment. To verify this hypothesis, we designed a general approach to synthesize the multicolored gold nanoparticles (GNPs) mediated by Au(I)-directed interlocking rings in proteins. The Au(I) ions shuttled among these interlocking rings in the strong alkaline solution. Through the rapid nucleation method, the multicolored GNPs of different morphology and sizes were synthesized in the multiple honeycombed templates. On the basis of the “three-color” principle of Thomas Young, we extracted the red, green, and blue (RGB) alterations of GNPs to fabricate a visual sensor array for protein discrimination. The fingerprints (ΔRGB) were obtained from the target proteins and fed into computer programs. The proposed sensing platform was also applied to detect lysozyme in human tears with satisfactory results. Importantly, we forecasted that lysozyme could be the effective drug for curing dacryocystitis and nasolacrimal duct obstruction diseases.
研究领域:
化学
·
生物学
·
医学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xinrong Li,Shuliang Chen,Xianzhi Hu,Futing Zi
A key challenge in the recovery of Au ions from thiosulfate gold leaching solutions is the design of adsorbents with abundant active adsorption sites, exhibiting high affinity and selectivity toward Au(I), thus enabling its fast, high-purity, and large-capacity recovery. Guided by theoretical calculations, in this study a polychloromethylstyrene (PCMS) material capable of supplying additional charges was functionalized by triethylamine (TEA) to selectively recover gold from a thiosulfate leaching solution. The adsorption of Au(S₂O₃)₂³⁻ onto the functionalized PCMS–TEA followed pseudo-second-order kinetics and was consistent with the Langmuir isotherm model, suggesting a single-molecular-layer chemisorption process. PCMS–TEA exhibited a significant Au-ion loading capacity (81.50 kg/t), highlighting the potential of benzene rings to enhance the charge intensity of ionic adsorbents. Furthermore, PCMS–TEA exhibited good Au-ion selectivity in a copper–ethylenediamine–thiosulfate Au leaching solution. The adsorption mechanism of Au ions on PCMS–TEA involved ion exchange between Cl − in the adsorbent and Au(S 2 O 3 ) 2 3− complex ions. The visual analysis of density functional theory results, based on the Multiwfn and Visual Molecular Dynamics programs, confirmed the presence of a weak interaction between PCMS–TEA and Au(S 2 O 3 ) 2 3− , dominated by van der Waals forces. After five desorption cycles, the adsorption rate of Au ions was approximately 90%, and NaCl was used as the elution reagent. This study introduces a promising adsorbent for the selective recovery of Au ions from thiosulfate Au leaching solutions.
研究领域:
材料科学
·
环境化学
·
冶金学
·
吸附技术
·
理论化学
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DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Xinrong Li,Xianzhi Hu,Futing Zi,Shuliang Chen,Peng Yang,Yan Zhang,Yunlong Chen,Li Zhao,Yue Lin,Yunshu Jiang,Jiao Li,Haiwen Wang,Zhujuan Li,Juan Li,Yufang Li
Natural materials that are economical and environmentally benign are being explored as adsorbent bases for recovering Au(I) from thiosulfate solution via an efficient grafted functional group. In this work, natural vermiculite (VE) modified with triphenylphosphine oxide (TPPO) was used to adsorb Au(I) from thiosulfate solution, and it's gold recovery performance and adsorption mechanism. Fourier transform infrared spectroscopy , scanning electron microscopy–energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and nitrogen adsorption were used to characterize the adsorbents. TPPO-modified VE (VE-TPPO) showed improved gold adsorption ability at a pH of approximately 10, thiosulfate concentration of approximately 0.1 mol/L and temperature of approximately 25 °C. More than 95% of Au(I) could be recovered, and the loading capacity of Au on VE-TPPO increased with decreasing adsorption temperature, reaching an amount of 4.22 kg/t after once adsorption. TPPO was adsorbed on vermiculite through cationic-π bonds. Au(I) was adsorbed on VE-TPPO by a ligand-exchange mechanism involving charge transfer between P O groups and Au(I). Moreover, the interaction mechanism between TPPO and Au(I) was further validated by density functional theory calculations. The use of natural materials with low cost and environmental impact can make the process of leaching gold with thiosulfate safer and cleaner.
研究领域:
环境科学
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材料科学
·
化学
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 67
·e202201968
·
IF 5.02
Shujue Xu,Shen Zhang,Yang Yu,Shengrui Zhang,Minjie Li
Graphical Au(I)-thiolate nanosheets with closely-packed multiple surface functional groups have been synthesized via a one-pot co-assembly strategy. The easy but powerful strategy addresses the surface engineering problem for 2D materials and paves the way for their wider applications in sensing and biomaterials. Two-dimensional (2D) Au(I)-thiolate assemblies are a special type of material that can balance high structural stability and rich surface functionality, which shows promising prospects in both fundamental research and applications. Co-assembly of multiple ligands is a facile way to further enrich the surface properties and functions, and expand their application potentials. In this work, taking 3-mercaptopropionic acid (MPA), cysteine (Cys) and 1-thioglycerol (TGO) as example ligands, we studied in detail the possibility to co-assemble them into one nanosheet. Although the three ligands have significantly different controllability and pathways when self-assembling individually with Au(I), they can still be effectively co-assembled by reacting with HAuCl 4 together to obtain three-ligand nanosheets with good colloidal stability. The key points for successful co-assembly are also revealed by comparing single- and three-ligand self-assembly processes, laying a solid foundation for co-assembly of even more ligands. The easy but powerful strategy for 2D materials with closely-packed and multiple tunable surface functional groups addresses the surface engineering problem for 2D materials and paves the way for their wider applications in sensing and biomaterials.
研究领域:
材料科学
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化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 26
·38298-38309
·
IF 0
Yang Yihuai,Hu Xianzhi,Zi Futing,Chen Shuliang,Zhao Li,Li Xinrong,Lin Yue
Thiosulfate gold leaching is one of the most promising green cyanide-free gold extraction processes; however, the difficulty of recovering Au(I) from the leaching system hinders its further development. This study prepared aminoguanidine-functionalized microspheres (AGMs) via a one-step reaction involving nucleophilic substitution between aminoguanidine hydrochloride and chloromethylated polystyrene microspheres and used AGMs to adsorb Au(I) from thiosulfate solutions. Scanning electron microscopy, Brunauer–Emmett–Teller analysis, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy were used to analyze the structure and properties of AGMs. Experiments were designed to investigate the effects of pH, temperature, initial Au(I), and thiosulfate concentrations on the gold adsorption performance of AGMs. Results demonstrated that AGMs can efficiently adsorb Au(I) from thiosulfate solutions in a wide pH range. The adsorption process conforms to the pseudo-second-order kinetic model and Langmuir isotherm model, with a maximum capacity of 22.03 kg/t. Acidic thiourea is an effective desorbent, and after four adsorption–desorption cycles, the adsorption rate of Au(I) by AGMs is 78.63%, which shows AGMs have good cyclic application potential. Based on the results of characterization, experiments, and density functional theory calculations, the mechanism for the adsorption of [Au(S 2 O 3 ) 2 ] 3− on AGMs involves anion exchange. Importantly, AGMs exhibited satisfactory adsorption property for Au(I) in practical Cu 2+ –NH 3 (en)–S 2 O 3 2− systems. This study provided experimental reference for the recovery of Au(I) from thiosulfate solution. Graphical Abstract
研究领域:
化学工程
·
材料科学
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产品关联
DOI
PubMed
JOURNAL OF ORGANIC CHEMISTRY
·
2024
·
IF 3.3
Lizhu Zhang,Wenqian Du,Jiawen Wu,Rongjie Yang,Fen Zhao,Baomin Fan,Zhonghua Xia
A gold-catalyzed sulfonylation of aryl/vinyl iodides to synthesize aryl sulfones facilitated by the ligand-enabled Au(I)/Au(III) redox catalysis was developed. In the reaction, aryl sodium sulfinates or sulphinic acids can react smoothly with aryl/vinyl iodides to directly construct various aryl sulfones. The strong synthetic capabilities of sulfone synthesis are demonstrated by its easily available and handled reagents, good functional group compatibility, and late-stage application of complicated biomolecules. Mechanistic studies suggest that the silver salt plays a crucial role in the transmetalation with the Au(I)/Au(III) intermediate, and the gold complex favors Au–S bond formation over Au–O bond formation.
研究领域:
有机化学
·
合成化学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jiale Liu,Zhennan Wu,Ye Tian,Yanchun Li,Lin Ai,Tingting Li,Haoyang Zou,Yi Liu,Xindong Zhang,Hao Zhang,Bai Yang
Aggregation-induced emission (AIE) and self-assembly induced emission (SAIE) effects have been employed to tune the emission properties of metal nanoclusters (NCs). However, it is still not possible to further enhance the photoluminescence quantum yields (PLQYs) and control the emission colors of the NCs using AIE and SAIE. On the basis of our recent work studying the contribution of Cu(I) defects in the SAIE of Cu NCs, in this article, Au(I) was doped into Cu NC self-assembled nanosheets (NSASs) to construct a more stable Au(I)-centered state. As a result, the PLQYs, emission stability, and tunability of emission colors of the Cu NSASs were significantly improved. Detailed studies reveal that the doped Au(I) induces a Au(I)–Cu(I) metallophilic interaction, which leads to a ligand-to-Cu–Au charge transfer, which facilitates the relaxation of excited electrons via a radiative pathway, thereby enhancing the emission intensity. The charge transfer from Cu to Au lowers the energy, thus leading to the red-shift of PL emission. Au(I) is likely doped into the Cu NSASs rather than in individual NCs, because 0.3% Au doping is enough to alter the emission properties. By mixing Au(I)-doped Cu NSASs with different emission colors (due to different Au doping percentages) as color conversion materials on commercially available 365 nm GaN chips, a white light-emitting diode prototype is fabricated.
研究领域:
材料科学
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纳米技术
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光学工程
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产品关联
DOI
PubMed
高影响因子
Russian Journal of Non-Ferrous Metals
·
2022
·Vol. 63
·期 1
·46-56
·
IF 0.691
He Puqiang,Xianzhi Hu,Futing Zi,Chaowu Wang
Abstract Effective gold recovery from thiosulfate leaching solution is important for the development of non-cyanide gold leaching technology. Herein, a novel functionalised activated carbon (denoted as AC-SH) that can effectively adsorb Au(I) from thiosulfate solution was synthesised using an environment-friendly route via the solid-phase reaction of activated carbon with 2-mercaptobenzoxazole. In the batch experiments, the effects of contact time, solution pH, temperature, and initial Au(I) concentration on the adsorption performance of AC-SH were investigated. Langmuir isotherm and pseudo-second-order kinetic models suitably described the adsorption of Au(I). Additionally, FT-IR, SEM, EDS, and XPS data revealed that AC-SH was successfully synthesised and Au(I) adsorption on AC-SH proceeded through chelation with Au(I) via the S‑containing functional group. The BET analysis result of AC shows that it is a mesoporous material (average pore diameter 2.193 nm). Additionally, Au-loaded AC-SH could be substantially desorbed (>95% recovery) using a concentrated thiosulfate solution. Herein, an economical, simple, and easy-to-implement method for the effective recovery of Au(I) from thiosulfate solution is described, which is expected to advance the development and application of non-cyanide Au extraction technology.
研究领域:
环境科学
·
材料科学
·
冶金工程
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 11
·e70415
·
IF 0
Yumin Leng,Muhua Lu,Mengyang Zhang,Anyi Wang,YuChen Dong,Jinbing Cheng,Yebin Guan
Heavy metal ions pose a significant threat to the environment and human health. Developing a highly sensitive heavy metal ion detection method is desirable. In this study, the Au(I)-catenates were formed in glucoamylase (Glu) and neomycin sulfate (Ne). The polychrome metal nanoparticles (MNPs) were prepared based on the template of Au(I)-catenates. The simple and ultrasensitive visual sensor array for the determination of heavy metal ions was established based on the color information extracted from polychrome MNPs. The addition of heavy metal ions shuttled among Au(I)-catenates in the strong alkaline solution. Through the use of the microwave heating method, the spherical and cubic MNPs of various sizes and colors were synthesized. To fully utilize the polychrome MNPs, a visual sensor was constructed for the detection and discrimination of eight heavy metal ions. The fingerprint-like color response signals correspond to each heavy metal ion and can be distinguished using computer software. The detection limit (0.1 nM) of heavy metal ions discriminated by the sensor is significantly lower than the data reported. The validation of the sensor was carried out by quantitative detection of Hg 2+ compared with its content in a certified reference material. This array method shows high sensitivity, good anti-interference, and potential in complex media.
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产品关联
DOI
LANGMUIR
·
2025
·
IF 3.9
Linghui Meng,Jie Jiang,Xuesong Peng,Lin Zhu,Ruopeng Li,Yaqiang Li,Maozhong An
Developing a cyanide-free gold electrodeposition system is significant for replacing the cyanide electroplating gold plating system, which is highly harmful to the environment and toxic to human health. In our study, a cyanide-free system for electrodepositing gold (Au) coatings was proposed with AuCl as the main salt and 5,5-dimethyl hydantoin (DMH) as the Au (I) complexing agent. Through theoretical calculations and electrochemical test screening, 4,6-dimethyl-2-mercaptopyrimidine (DMP) is suitable for DMH-based gold electrodeposition and was selected as an electroplating additive. The role of DMP in gold electrodeposition was further studied. In particular, the adsorption–coordination mechanism was proposed to elucidate the role of DMP, based on calculations of the Bader charge density difference for DMP adsorbed on the gold surface and the interaction between DMP and Au+. Electrochemical tests such as cyclic voltammetry and chronoamperometry were utilized to study the impact of varying DMP concentrations on gold electrodeposition behavior. Chronoamperometric analysis indicates that Au electrodeposition obeys a 3D diffusion-controlled progressive nucleation process, independent of DMP concentration and applied potential, while the presence of DMP markedly suppresses grain growth. The addition of DMP significantly improved the surface morphology and brightness of the gold coating, resulting in a smooth and dense layer with a golden-yellow appearance. XRD results showed that the addition of DMP reduced the grain size of the Au coating from 22.1 to 15.7 nm, with the gold coating primarily growing along the Au (111) plane. The XPS test results show that the purity of the gold plating layer is high, and there is no inclusion of additives in the coating.
研究领域:
电化学
·
材料科学
·
表面工程
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理论化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 8
·1-9
·
IF 5.833
Leng Yumin,Cheng Jinbing,Liu Congbin,Wang Dong,Lu Zhiwen,Ma Chunhua,Zhang Mengyang,Dong Yuchen,Xing Xiaojing,Yao Lunguang,Chen Zhengbo
A gold nanoparticle (AuNP)–based sensing strategy based on rapid reduction of Au(I→0) is proposed. As a proof-of-concept study, the proposed sensing principle is designed for simultaneous and colorimetric detection and discrimination of multiple proteins. In the presence of H 2 O 2 , the target proteins could reduce Au(I) (i.e. HAuCl 2 ) to AuNPs with different sizes, shapes and dispersion/aggregation states, thus resulting in rapidly colorimetric identification of different proteins. The optical response (i.e. color) of AuNPs is found to be characteristic of a given protein. The color response patterns are characteristic for each protein and can be quantitatively differentiated by statistical techniques. The sensor array is capable of discriminating proteins at concentrations as low as 0.1 μg/mL with high accuracy. A linear relationship was observed between the total Euclidean distances and protein concentration, providing the potential for protein quantification using this sensor array. The limit of detection (LOD) for catalase (Cat) is 0.08 μg/mL. The good linear range (from 0 to 8 μg/mL) has been used for the quantitative assay of Cat. To show a potentially practical application, this method was used to detect and discriminate proteins in human urine and tear samples.
We report a facile gold nanoparticle (AuNP)-based sensing strategy, that is, "a rapid reduction of Au(I) to Au(0) nanoparticles with different sizes and shapes by analytes that having certain reducing capabilities, resulting in different colours." The proposed sensing principle is designed for simultaneous, colorimetric detection and discrimination of multiple proteins.
研究领域:
生物化学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）