DYES AND PIGMENTS
·
2025
·
IF 4.2
Tingye Gu,Qing Guo,Dongming Qi,Pu Gao,Weiguo Chen,Zhihua Cui,Sateesh Bandaru
N -hydroxysuccinimide esters (NHS esters) are widely recognized as amine-reactive compounds due to their mild reaction conditions and high efficiency. In this study, NHS ester group was introduced into the dye chromophores to design and synthesize carboxylic acid succinimidyl ester dyes ( CSED s) in red, yellow and blue colors. The CSED s were characterized using high-resolution mass spectrometry, proton nuclear magnetic resonance, and infrared spectroscopy. When the NHS ester group was introduced, UV–vis absorption spectroscopy only slightly affected the molar extinction coefficient and maximal absorption wavelength. Hydrolysis studies demonstrated that CSED s hydrolyzed slowly in acidic environments but quickly in weakly alkaline ones, with near-complete hydrolysis taking place at pH 8.5 after half an hour. It was discovered that CSED s could successfully dye silk fibroin at room temperature in weakly alkaline conditions, producing a high color depth and more than 95 % color fixing. The binding of CSED s to silk fibroin was confirmed through covalent bonds using DMF stripping method and dialysis method. Furthermore, the color fastness of dyed silk fibroin to washing and rubbing was rated above grade 4–5. Compared to commercial dyes, the milder dyeing conditions of CSED s can save energy and did not require a significant amount of salt to promote the dyeing process.
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高影响因子
ANALYTICAL LETTERS
·
2023
·
IF 2
Peng Qiu,Zhaorui Song
A simple and rapid fluorescence polarization immunoassay (FPIA) based on polyclonal antibodies is reported for the first time for the determination of nicotinic acid. First, six nicotinic acid analogues were coupled with fluorescein isothiocyanate isomer I (FITC) to obtain tracers. The influences of tracer structure on the performance of FPIA as well as the structure-activity relationships were explored. Subsequently, the tracer concentration and antibody dilution ratio on the performance of FPIA were investigated. For the optimal conditions, the detection range of FPIA was from 1.1 to 145.6 μg mL−1 and its IC20 value as the limit of detection (LOD) was 1.1 μg mL−1. The cross-reactivity of antibodies with common vitamins was evaluated. The intra-assay recovery was from 92.0% to 101.2% in food and tablets, with inter-assay recoveries between 92.0% and 103.8%. The developed FPIA provided good sensitivity and reproducibility and therefore provided efficient and economic screening for nicotinic acid in food and tablets.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 44
·e54633
·
IF 3
Zelin Hong,Xiangrong Chen,Hanshan Zhu,Tianyin Zhang,Hao Li,Muhammad Awais,Ashish Paramane
Grafting a voltage stabilizer on molecular chains of cross-linked polyethylene (XLPE) can effectively improve the materials' insulation properties. Four different samples (XLPE, XLPE grafted with the voltage stabilizer, low-density polyethylene (LDPE) blended with the voltage stabilizer, and LDPE grafted with the voltage stabilizer) are prepared in this paper. Several physicochemical and dielectric tests are performed to investigate the properties of the samples. The results demonstrate that the m-aminobenzoic acid is successfully grafted onto the XLPE molecular chain. Moreover, the crosslinking and grafting processes are equally important for enhancing the materials' performance of the XLPE. In addition, the grafted voltage stabilizer negligibly affects the gel content and thermal properties of XLPE. However, it increases the crystallinity but decreases the lamella thickness. Moreover, the XLPE grafted with a voltage stabilizer has lower direct current (DC) electrical conductivity, less aggregation of space charge, and higher DC breakdown strength. The trap distribution results indicate that the voltage stabilizer introduces shallow traps in the sample and the quantum chemical calculations describe that the material bandgap is decreased. Thus, the high-energy charge carriers are buffered by the newly-introduced traps and the functional groups, leading to the enhanced material properties of the XLPE.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 33
·e52786
·
IF 3.057
Zelin Hong,Xiangrong Chen,Guangyu Zhu,Muhammad Awais,Yiwen Shi,Hanshan Zhu,Hao Li,Ashish Paramane
The effect of adding electron-buffering voltage stabilizer (1 wt% m-aminobenzoic acid) on the electrical tree-induced degradation of cross-linked polyethylene (XLPE) was studied at high temperatures. The electrical tree inception, growth, and partial discharge characteristics were simultaneously analyzed at 30, 50, and 70°C, respectively. The results showed that the growth rate of electrical tree and partial discharge activity as well as the discharge repetition rate, significantly increased with the temperature for pure XLPE and XLPE stabilizer blend. However, the XLPE stabilizer blend exhibited higher tree inception voltage, lower tree growth rate, and partial discharge activity than pure XLPE. The addition of the voltage stabilizer reduced the carbon layer thickness in the tree channel and offered higher resistance to the electrical tree growth. Surface potential decay demonstrated that the voltage stabilizer addition decreased the trap energy level, but increased the shallow trap density of the XLPE. Quantum chemical calculations showed that the voltage stabilizer enhanced the ability to buffer the high-energy electrons in the XLPE. A high-energy electron buffering mechanism was also proposed to explain the effect of voltage stabilizer on the electrical treeing and partial discharge activity in the XLPE at high temperatures.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Jingxin Zhou,Ran Wang,Weiwei Su,Lexin Zhang,Adan Li,Tifeng Jiao
Diabetes is one of the global chronic diseases, which is mainly caused by the abnormal increase of blood sugar level. Therefore, it is particularly important to monitor glucose in real time. In this work, based on the principle that phenylboronic acid can react with diol rapidly and reversibly in aqueous medium, phenylboronic acid functionalized reduced graphene oxide (rGO-PBA) and polyhydroxy modified carbon spot fluorescent probe (CD1) were designed for detecting important glucose molecules. Among them, reduced graphene oxide (rGO) has high specific surface area and strong fluorescence quenching performance. When CD1 is close to the surface of rGO-PBA, the fluorescence of carbon dots was quenched. With the addition of glucose, the fluorescence of carbon dots increased continuously. The detection of small molecule glucose can be realized quickly and sensitively by using the "on" and "off" strategies of fluorescence.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 32
·15250-15260
·
IF 3.3
Xiaofeng You,Lin Han,Qing Liu
Hyper-cross-linked resins have tremendous prospects for the removal of organic dyes from aqueous solutions due to their adjustable porosity, tunable polarity and diversified functionality, whereas the extreme hydrophobicity of the skeleton limits their application. Hence, it is essential for introducing polar functional groups in the construction of a highly polar hyper-cross-linked resin. In this work, we synthesized polar-modified hyper-cross-linked resins (HVPN-x) by introducing 3-aminobenzoic acid (3-AC) containing amino and carboxyl groups via a stepwise combination. The analysis results indicated that hydrophilicity significantly enhanced with the increase of the percentage of 3-AC. The water diffusion time of HVPN-6 can be found to be quite fast and the complete diffusion of water droplets occurs within 0.28 s. The adsorption experiment results demonstrate that HVPN-6 exhibited a significant increase in RhB adsorption capacity, equivalent to 2.6 times that of pristine HVPN-0. This is probably because the uploaded amino and carboxyl groups are conducive to equilibrium adsorption due to polar matching, and hydrogen bonding is possibly formed between the resin and Rhodamine B. Above all, the polar hyper-cross-linked resin modified with the 3-AC monomer may be a potential candidate for Rhodamine B adsorption from aqueous solution owing to its excellent polarity.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-14
·
IF 16.6
Yu Chaojie,Shi Mingyue,He Shaoshuai,Yao Mengmeng,Sun Hong,Yue Zhiwei,Qiu Yuwei,Liu Baijun,Liang Lei,Zhao Zhongming,Yao Fanglian,Zhang Hong,Li Junjie
With advances in tissue engineering and bioelectronics, flexible electronic hydrogels that allow conformal tissue integration, online precision diagnosis, and simultaneous tissue regeneration are expected to be the next-generation platform for the treatment of myocardial infarction. Here, we report a functionalized polyaniline-based chronological adhesive hydrogel patch (CAHP) that achieves spatiotemporally selective and conformal embedded integration with a moist and dynamic epicardium surface. Significantly, CAHP has high adhesion toughness, rapid self-healing ability, and enhanced electrochemical performance, facilitating sensitive sensing of cardiac mechanophysiology-mediated microdeformations and simultaneous improvement of myocardial fibrosis-induced electrophysiology. As a result, the flexible CAHP platform monitors diastolic-systolic amplitude and rhythm in the infarcted myocardium online while effectively inhibiting ventricular remodeling, promoting vascular regeneration, and improving electrophysiological function through electrocoupling therapy. Therefore, this diagnostic and therapeutic integration provides a promising monitorable treatment protocol for cardiac disease.
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PubMed
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 45
·6229-6238
·
IF 3.1
Qiuyan Zhao,Mingyue Ding,Dangshuai Pei,Xiuhua Qi,Yexuan Mao,Xianqing Huang,Lianjun Song,Jingnan Zuo,Huijuan Yang,Xiya Zhang
To monitor benzoic acid (BA) residues in liquid food samples, a monoclonal antibody (mAb)-based lateral flow immunoassay (LFA) was developed in this study. First, 2-aminobenzoic acid (2-AA), 3-aminobenzoic acid (3-AA), and 4-aminobenzoic acid (4-AA) were conjugated to BSA and used as immunogens. After cell fusion, mAb 6D8 from 4-AA-BSA performed best with an IC50 value of 0.21 mg L−1 using 3-AA-OVA as a heterogeneous antigen, which represented a 3.4-fold improvement compared with the homogeneous antigen 4-AA-BSA. Subsequently, eight kinds of CGNPs with sizes varying from 20.94 nm to 90.00 nm were synthesized for screening the suitable size to develop a sensitive LFA. Finally, a sensitive LFA based on colloidal gold (23.27 nm) nanoparticles was developed for screening BA with a cut-off value of 4 mg L−1, which could meet the requirement of BA detection in milk, Fanta, Sprite, Coca-Cola, and Smart samples.
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PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2020
·Vol. 22
·期 11
·1-10
·
IF 2.132
Yang Yunjiang,Zhu Xiaowei,Bao Jinrong,Bai He,Wu Anping,Qiao Yan,Bian Yulong,Zhao Xin,Li Wenxian,Liu Ying
In this study, the core/shell/shell-structured SiO 2 /YPO 4 :Nd/SiO 2 composite microspheres with near-infrared luminescence property were prepared by sol-gel method. The morphology and structure of the as-prepared microspheres were observed by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and infrared spectroscopy (IR). These tests show that the composite microspheres have a sandwich structure. The diameter of the core SiO 2 microspheres is ~ 220 nm, the intermediate layer thickness of rare-earth phosphate is ~ 5 nm, and the outer SiO 2 layer is ~ 20 nm thick. The core/shell/shell microspheres are emitted at 1063 nm in the near-infrared region, which attributes to optical transparent windows of biological tissues. Meanwhile, the interaction between the composite microspheres and bovine serum albumin (BSA) was investigated. The results showed that the composite microspheres could quench the emission intensity of BSA by binding the tryptophan residues in BSA. The synthesized core/shell/shell composite microspheres may be used as near-infrared luminescence probes in the field of biological tissue imaging.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 39
·49185
·
IF 2.52
Zuojun Wei,Haiyan Liu,Linwei Yu,Shuwen Xiao,Yaxin Hou,Xiangrong Chen
Seven delocalized aromatic molecules with electron-donating and electron-withdrawing groups are applied as voltage stabilizers to improve the insulation properties of polyethylene blends. Voltage stabilizers 1 wt% are added into the blends (90 wt% low-density polyethylene and 10 wt% high density polyethylene) by diffusion loading method. Electrical measurements including electrical treeing, space charge distribution, and direct current conductivity are conducted to disclose their effects. The results show that the co-existence of matched electron-donating and electron-withdrawing groups in the molecules is favorable for the insulation properties. A 50% increase of tree initiation voltage is achieved with the addition of 3-aminobenzoic acid, which is also able to inhibit the space charge and decrease the conductivity at lower temperature. Besides, the grafting sample of the optimal molecule is successfully prepared and displayed enhanced electrical properties. Finally, the common internal mechanism of the delocalized molecules on different electrical properties is revealed.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Hongwei Hu,Xinmeng Tian,Yixuan Gong,Guolan Ren,Jiangong Liang
Despite extensive research on carbon dots (CDs), rare studies have been performed on the photostability of CDs. Here, the photostability of CDs synthesized with 3-aminobenzoic acid were systematically investigated under different pH conditions (5.0, 7.4 and 9.0). The results showed that under Xenon lamp irradiation, the fluorescence (FL) intensity of the CDs exhibited an increase first and then a decrease, with a gradual shift of the maximum emission wavelength to longer wavelength. Further investigation indicated that the irradiation induced the change of the CD surface functional groups and gave rise to aggregation, resulting in the formation of larger particles. This study provided important reference value towards research on CDs properties.
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PubMed
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 40
·6351-6357
·
IF 3.304
Kui-Suo Yang,Yi-Lian Li,Yang-Yang Ma,Li-Na Feng,An-Ping Wu,Yan Qiao,Jin-Rong Bao,Wen-Xian Li,Xiao-Wei Zhu,Ran-Bo Yu
A novel core–shell–shell SiO2@CePO4:Tb@SiO2 submicro-sphere was controllably synthesized by a bridging ligand organosilane HOOCC6H4N(CONH(CH2)3Si(OCH2CH3)3)2 (MABA-Si) connecting the silica core and rare earth ions. The as-synthesized samples were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (IR). It is found that SiO2@CePO4:Tb@SiO2 has a ∼25 nm outermost shell, a ∼4 nm intermediate shell, and a ∼200 nm core. SiO2@CePO4:Tb@SiO2 exhibits stable photoluminescence properties in aqueous solution: its photoluminescence intensity was unquenched even after 15 days. The core–shell–shell submicro-spheres were found to have better photoluminescence than the core–shell submicro-spheres because the SiO2 shell protected the phosphor materials and then improved its photoluminescence intensity and biocompatibility. A formation mechanism of the core–shell–shell SiO2@CePO4:Tb@SiO2 submicro-spheres was proposed. Thus, the low-cost preparation of the core–shell–shell SiO2@CePO4:Tb@SiO2 submicro-spheres could be rationally achieved using SiO2.
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