JOURNAL OF RAMAN SPECTROSCOPY
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2020
·Vol. 52
·期 2
·491-496
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IF 2
Lin Zhu,Hao Ma,Wei Song,He Wang,Peng Li,Chao Ma,Jiawei Wu,Lin Guo,Bing Zhao
Intercalation, the insertion of guest atomic and molecular entities into the architecture of a crystal, is an efficient route for generating new materials with novel properties. However, the detailed analysis of their new structure and properties is of great importance, which are still insufficient. Here, 1,2-bis(4-pyridyl)ethylene (BPE) intercalated PbI 2 (BIP) has been investigated by Raman spectroscopy together with correlated studies of scanning electron microscope (SEM), X-ray diffraction (XRD), ultraviolet–visible (UV–Vis) absorption spectrum, and energy-dispersive X-ray spectroscopy (EDS). The Raman spectrum of intercalated compound discloses new lines at 83, 222, and 234 cm −1 with remarkable displacement of the bands at 1001, 1200, 1603, and 1640 cm −1 , indicating a formation of a new crystal and the chemical interaction between the nitrogen atom of guest molecules with PbI 2 host material. XRD confirmed the intercalation of guest molecules into a host matrix through the appearance of diffraction lines at lower angles that are corresponding to the enlarged unit cell in c axis. Furthermore, we also found that the PbI 2 can specifically adsorb of BPE molecules, which was confirmed by an adsorption experiment revealed by adsorption capacity toward BPE is higher than 2,2-bipyridine and 4,4-bipyridine, suggesting the good adsorptive selectivity toward BPE by PbI 2 film. This work further demonstrated our mechanism on enhanced Raman spectroscopy on PbI 2 . It is believed that this unusual discovery not only enables PbI 2 to be a specific adsorbent, which also provides a new advance toward a better understanding of structure about PbI 2 .
研究领域:
材料科学
·
光谱学
·
晶体结构
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高影响因子
DALTON TRANSACTIONS
·
2024
·
IF 3.5
Hafiz Muhammad Zohaib,Madiha Saqlain,Maroof Ahmad Khan,Sara Masood,Ijaz Gul,Muhammad Irfan,Hui Li
The 1D homochiral coordination polymer (CP-1) {[Co(dTMP)(bpe)2(H2O)3]·9H2O}n was constructed by using 2′-deoxy thymidine 5′-monophosphate disodium salt (dTMP·2Na), and auxiliary ligand bpe (1,2-bis(4-pyridyl)ethene) and characterized by single-crystal XRD, PXRD, IR, UV-visible, CD and TGA analyses. Molecular simulations revealed the selective chiral behaviour of CP-1 towards phenylalanine and histidine, as indicated by their higher binding free energies compared to other amino acids. Theoretical parameters were also compared with experimental UV-visible verdicts. Notably, the D-enantiomers of phenylalanine and histidine demonstrated strong bonding abilities and optimal configurations for probing and distinguishing them from their L-counterparts. These findings led to propositions suggesting that the dissimilarities between these D and L amino acid forms and their binding orientations with CP-1 may contribute to alterations in the CD signal. CP-1 exhibited a robust inherent circular dichroism (CD) signal in aqueous solutions, modulated by the presence of specific amino acids, namely D/L phenylalanine and D/L histidine. Leveraging the measurement of CD signal intensity, a sensor capable of detecting unmodified amino acids has been developed. Unlike previously reported approaches that relied on complex chemical reactions between initially CD-silent molecules and probed amino acids, this new method offers a more straightforward means of amplifying the CD signal. Consequently, this change facilitates a more accurate differentiation between the enantiomers of these specific amino acids compared to others.
研究领域:
材料科学
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分析化学
·
分子生物学
·
生物物理学
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PubMed
高影响因子
Food Analytical Methods
·
2023
·
IF 2.9
Qiao Fanglin,Chen Yin,Fei Yunjie,Jiang Yanjun,Xiong Xiaohui,Liu Yuanjian
Due to the complex characteristics of food matrix, false positives may occur when using traditional methods to detect aflatoxin B1 (AFB1). In this paper, we utilize the advantages of closed bipolar electrode (BPE) that can effectively avoid the impact of complex food matrices on signal collection, and design a biosensor based on immune competition to detect highly toxic AFB1. The biosensor uses cathode of closed BPE as a functional sensing interface and anode as a signal collection interface. On the functional sensing interface, AFB1 connects to the monoclonal antibody at the top of DNA tetrahedron structure. Under the action of horseradish peroxidase (HRP), 4-chloro-1-naphthol (4-CN) is catalyzed by hydrogen peroxide (H 2 O 2 ) to generate precipitations (4-CD). AFB1 competes with HRP-AFB1 to bind monoclonal antibody, resulting in a decrease in the content of HRP involved in catalytic oxidation reactions and a synchronous reduction in precipitations produced, causing an increase in the intensity of [Ru(bpy) 3 ] 2+ /TPA system electrochemiluminescence (ECL) on the BPE anode. Analysis shows that the relative deviation between the detection results and ELISA is between −4.5 and 9.8%, and there is no significant difference in the performance of the two in detecting AFB1. The BPE-ECL sensor exhibits high sensitivity and specificity in detecting AFB1, with a linear range of 0.01–40 ng mL −1 and a detection limit of 3 pg mL −1 . In the future, it can be applied to the detection of other toxins, with broad application prospects.
研究领域:
食品安全检测
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生物传感
·
分析化学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Lin Zhu,Hao Ma,He Wang,Peng Li,Lin Guo,Bing Zhao
Surface-enhanced Raman scattering (SERS) on organic–inorganic hybrid perovskites have been proved a promising SERS-active substrate. As its inorganic skeleton, lead iodide (PbI 2 ) also represents a novel semiconductor substrate material that serves as either a complement or an alternative to conventional metal-based SERS. Here, for the first time, enhanced Raman scattering (ERS) of 1,2-bis(4-pyridyl)ethylene (BPE) adsorbed on PbI 2 film is observed. To our surprise, we obtained the same ERS spectra on the PbI 2 as SERS spectra obtained on the perovskites, which demonstrates the enhancement of substrate comes from inorganic skeleton rather than organic–inorganic hybrid perovskites. Compared with the normal Raman spectrum of BPE molecules, we find the B u mode of the BPE molecule was selectively enhanced. We demonstrate that it involves a charge transfer (CT) resonance mechanism and takes place between the HOMO of BPE and the conduction band edge of PbI 2 . Moreover, the PbI 2 substrate performs good reproducibility, uniformity and good Raman enhancement (EF ≥ 10 5 ). It is believed that this unusual discovery not only enables PbI 2 to be an enhanced substrate, which also provides a new advance toward a better understanding of SERS chemical mechanism.
研究领域:
材料科学
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光学
·
化学
·
半导体物理
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Hang Xu,Wenhui Zhang,Sicheng Zhu,Bingyu Shen,Xinyu Li,Bingqi Jiang,Lianhong Wang,Philippe F.X. Corvini,Max M. Häggblom,Rong Ji
Transformation of bisphenol compounds during nitrogen removal processes in wastewater treatment plants, along with the key microbial taxa associated with this transformation, remains poorly understood. In this study, we examined the transformation of a series of alkylbisphenols (ABPs; bisphenol A, bisphenol E, and bisphenol F) and sulfonylbisphenol (bisphenol S) in an enriched nitrifying activated sludge (NAS). While bisphenol S was persistent in the NAS, the ABPs were effectively transformed; however, 14 C-isotope tracing revealed that the majority of BPA (presumably also other ABPs) was retained in the NAS as transformable intermediates and potentially toxic nitroaromatic compounds, with minor mineralization (< 1 %). In total, nine transformation products were identified, including nitrated aromatic compounds and single-ring phenolic compounds. Ammonia‑oxidizing bacteria (AOB), primarily Nitrosomonas , drove abiotic ABP transformation to persistent nitroaromatic products. Heterotrophic bacteria, such as Sphingomonas , Methyloterena , and Comamonas , initiated ABP transformation via type II ipso- hydroxylation and oxidative cleavage, and also mineralized the intermediates formed through the AOB-mediated dealkylative nitration. By integrating batch experiments, HPLC–QTOF-MS/MS, 14 C-tracing, and 16S rRNA gene sequencing, we provide a comprehensive understanding of these complementary transformation pathways and the key microbial taxa involved. Our findings highlight the significant role of AOB-mediated abiotic reactions in ABP transformation, and alarmingly revealed that the traditional nitrogen removal processes using NAS may produce toxic persistent nitroaromatic compounds, thereby leading to unexpected environmental risks.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xue Ye,Jianneng Liang,Jiangtao Hu,Dazhuan Wu,Yongliang Li,Xiaoping Ouyang,Qianling Zhang,Xiangzhong Ren,Jianhong Liu
To achieve safe and high energy density solid-state batteries (SSBs), the weight of solid-state electrolyte (SSE) should be minimized and a high voltage and high specific capacity cathode should be used. Polyethylene oxide (PEO)-based polymer electrolytes (PEs) has been identified as the optimal SSE for SSBs owing to their versatile advantages. However, fabricating ultra-thin and high voltage stable PEO-based PEs is still challenging. Herein, an ultra-thin (8.1 µm) blending polymer electrolyte (BPE) is designed through blending PEO, Polymethyl methacrylate (PMMA) and Poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP), and complexing with Succinonitrile (SN), Fluoroethylene carbonate (FEC) and LiTFSI plasticizers. Based on this design, Li|BPE|LiFePO 4 quasi-solid-state battery (QSSB) can operate for 250 cycles with a capacity retention of 92.8%, 4.5 V high voltage Li|BPE|LiCoO 2 QSSB exhibits 87% capacity retention after 80 cycles, with an average Coulombic efficiency ≥99.8%, which is much superior than 4.5 V Li|PEO|LiCoO 2 SSB, whose capacity rapidly decays to 0 mAh/g after a dezen of cycles. DFT calculation suggests that blending PEO, PMMA and PVDF-HFP increase the electrochemical oxidation tolerance. Interface study by TEM and XPS discloses PEO-LiTFSI/LiCoO 2 interface is unstable with a big amount of decomposed products from PEO-LiTFSI and from LiCoO 2 , while BPE/LiCoO 2 interface is more stable without obvious decomposition, indicating the promising application of BPE for high energy density QSSBs.
研究领域:
材料科学
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电化学
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电池技术
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Yu Liu,Qiu-Yue Cheng,Hang Gao,Hong-Yuan Chen,Jing-Juan Xu
A microfluidic gradient array is a widely used screening and analysis device, which has characteristics of high efficiency, high automation, and low consumption. Bipolar electrode electrochemiluminescence (BPE-ECL) has special value in microfluidic array chips. The combination of the microfluidic gradient and BPE arrays has potential for high-throughput screening. In this article, a microfluidic BPE array chip for gradient culture and conditional screening of cancer cells was designed. The generation of concentration gradients, continuous culture of cancer cells with high throughput, and drug screening through BPE-ECL of the Ru(bpy)32+/TPrA system can be performed in one chip. We tested gradient pro-oxidation of MCF-7 by ascorbic acid and the synergistic effect of pro-oxidation on doxorubicin. The method achieves high analysis efficiency through a BPE array while simplifying the tedious procedures required by cell culture methods.
研究领域:
生物医学工程
·
分析化学
·
癌症研究
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Zhihui Wu,Da-Wen Sun,Hongbin Pu,Qingyi Wei,Xuanran Lin
Mycotoxin B1 (AFB1) contamination in agricultural products pose a deadly danger to animal and human health and its rapid and reliable detection is thus very important. Herein, a ratiometric surface-enhanced Raman scattering (SERS) aptasensor for AFB1 detection was developed, in which 1,2-bis(4-pyridyl) ethylene (BPE) was used to trigger the assembly of Au nanoparticle dimers (AuNP dimers) and form intensive SERS “hot spots”, and MXenes nanosheets could load aptamer-modified AuNP dimers due to the hydrogen bonding and the chelation between the phosphate groups of aptamers and the Ti ion of MXenes. With the presence of AFB1 preferentially binding to AFB1 aptamer, AuNP dimers were separated from MXenes nanosheets, leading to a decrease in SERS intensity. Regression analysis in the range from 0.001 to 100 ng·mL −1 showed the limit of detection (LOD) being 0.6 pg·mL −1 in standard solution, indicating that the great prospects of the AuNP dimers/MXenes SERS substrate for detecting AFB1.
研究领域:
分析化学
·
纳米技术
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食品安全
·
毒理学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）