RSC Advances
·
2015
·Vol. 5
·期 73
·59056-59061
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IF 3.84
Lun Song,Haiyu Tian,Xiaoliang Pei,Ziyou Zhang,Weibing Zhang,Junhong Qian
Two water-soluble colorimetric and turn-on fluorescent probes STP1–2 were rationally designed and synthesized for selective recognition of GSH. Both probes are colorless 4-thioether-1,8-naphthalimide derivatives, which are almost non-fluorescent due to the photoinduced electron transfer from the fluorophore to the 4-nitrobenzene. Upon addition of GSH to STP1/STP2–CTAB solution, obvious spectral responses were observed: the absorption peak shifted from 345 nm to 390 nm companied with ∼90-fold fluorescence enhancement at 487 nm. A good linear relationship between the fluorescence intensity and GSH concentration was obtained, and the detection limit of GSH was estimated to be 8.40 × 10−8 mol L−1. The experimental results imply that both probes could be applied in fluorescent imaging of GSH within living cells and in the detection of mercapto-containing proteins as well.
研究领域:
生物化学
·
分析化学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Zhen Lin,Chuangui Cai,Wei Chen,Qian Deng,Jialin Yang,Kaiyuan Huang,Haohua Deng,Xinhua Lin,Wei Chen,Wensong Yao
Chemiluminescence (CL) intensity of luminol-H 2 O 2 system was dramatically enhanced by cetyltrimethylammonium bromide (CTAB) micelle-mediated 6-aza-2-thiothymine-protected gold nanoclusters (ATT-AuNCs). It is proved that spherical micelles of CTAB in aqueous solution improved the dispersity of ATT-AuNCs, thus enhancing their catalytic activity, which brought in the increased CL intensity of luminol-H 2 O 2 system. Carbazochrome sodium sulfonate (CSS) with a hemostatic containing tetrahydroindole structure broke the spherical micelles and notably quenched the CL intensity of luminol-H 2 O 2 -CTAB-ATT AuNCs system. Based on these results, a simple, fast, and sensitive CL method has been developed for the detection of CSS with a linear range of 0.25–25 μM and a detection limit of 0.11 μM. The method has also been successfully applied to the determination of CSS in serum with satisfied recoveries in the range of 89.6 % to 103.7 %. This study not only provides an effective approach for CSS detection but also paves the way for AuNCs-based CL applications.
研究领域:
分析化学
·
纳米生物学
·
药物检测
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DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2019
·
IF 2.752
Licong Wang,Chengying Shen,Yuhua Cao
In our previous study, cetyltrimethylammonium bromide (CTAB) admicelles on polystyrene (PS) microspheres for the adsolubilization of phenanthrene had been developed. In this work, CTAB admicelles modified on magnetic PS nanocomposites was used as a novel adsorbent to facilitate magnetic separation. Magnetic PS (MPS) nanoparticles (NPs) were synthesized by miniemulsion polymerization, in which the emulsifier was polyvinylpyrrolidone (PVP) and an oil phase consisted of oleate-modified Fe 3 O 4 NPs dispersed in octane and styrene as the monomer. MPS NPs and CTAB-modified MPS NPs were characterized using transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), Brunauer–Emmet–Teller, and atomic force microscopy (AFM) analysis. The TEM results revealed that the MPS NPs had regularly spherical shape with an average diameter of 140 nm. The saturation magnetization (Ms) of MPS NPs and CTAB-modified MPS NPs were 49.04 and 32.52 emu·g −1 , respectively. Unexpectedly, AFM images revealed that the large admicelles were formed on MPS NPs due to PVP, and the height of the aggregates was 64 nm, 5.3 times as much as that of the aggregates on the PS microsphere. For CTAB-modified MPS NPs, the height of the aggregates increased to 99.9 nm. Through CTAB modification, the specific surface area of the MPS NPs notably reduced from 2.36 to 1.06 m 2 g −1 , which indirectly verified that bigger CTAB admicelles were formed. Cation–π electron interaction enabled phenanthrene to be adsolubilized in CTAB admicelles on MPS NPs. The equilibrium adsorption capacity of the CTAB-modified MPS NPs for phenanthrene was 24.3 mg g −1 , which was 1.7, 2.1, and 6.0 times higher than the amount of the MPS NPs, CTAB-modified and original PS microspheres, respectively.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MATERIALS LETTERS
·
2017
·
IF 2.572
Yudong Wang,Tianshun Liao,Miao Shi,Cong Liu,Xiaofeng Chen
This paper reports a facile method for fabricating radial mesoporous bioactive glasses (RMBGs) using Hexadecyl trimethyl ammonium bromide (CTAB) micelle as the reaction center. The radial structure was formed with the extension of precursor dissolved in the hydrophobic solvent (cyclohexane) which gathered in the internal part of the CTAB micelle. The morphology, structure and in vitro bioactivity of RMBGs were investigated by various methods. The results indicate that the CTAB micelle could restrict the precursor-dissolved cyclohexane and was in favor of preparing the RMBGs with radial mesoporous structure, high specific surface area and good apatite-forming ability. The obtained RMBGs with the novel structure and properties may have potential application in drug delivery and hard tissue regeneration.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2014
·Vol. 17
·期 33
·21158-21163
·
IF 4.198
Meng Jiang,Zhijiang Qian,Xufeng Zhou,Xing Xin,Jinghua Wu,Chao Chen,Gongjun Zhang,Gaojie Xu,Yuchuan Cheng
A structure of hexadecyl trimethyl ammonium bromide (CTAB) micelle-assisted reduced graphene oxide–Ag nanoparticle (rGO–AgNP) hybrids is designed and fabricated for SERS detection of nonpolar polycyclic aromatic hydrocarbons (PAHs), in which CTAB micelles act as the host material to capture PAH molecules. This method provides stable aqueous suspensions of functionalized graphene with an alkyl chain, since the rGO–AgNP hybrids do not need to be pre-modified by CTAB. The result shows that the CTAB-assisted rGO–AgNP substrate has excellent SERS performance toward PAHs and ideal stability under continuous laser radiation. With further optimization, the detection limits of pyrene and perylene were 10−6 M and 10−7 M, respectively. Two different PAH molecules could be detected simultaneously by their characteristic peaks.
研究领域:
材料科学
·
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
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