A sensitive fluorescent assay for thiamine based on metal-organic frameworks with intrinsic peroxidase-like activity

Tan, Hongliang; Li, Qian; Zhou, Zhengchen; Ma, Chanjiao; Song, Yonghai; Xu, Fugang; Wang, Li

doi:10.1016/j.aca.2014.11.026

Cited by 107 publications

(50 citation statements)

References 41 publications

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“…Metal‐organic frameworks (MOFs) have received considerable attention in recent years as very interesting functional materials, mainly because of their chemically tunable structures and high specific surface areas . MOFs are a new class of hybrid inorganic‐organic porous crystalline materials assembled using metal ions or clusters and organic linkers via coordination bonds, often resulting in fascinating structural topologies and offering unique chemical properties . These versatile structures have been used for a range of applications including gas storage and separation , energy storage , biomedical imaging and drug delivery , catalysis and, more recently, electrochemical devices .…”

Section: Introductionmentioning

confidence: 99%

“…The diverse possibilities of the combination of metal ions and organic linkers allow the obtainment of an infinite number of new MOFs with different architectures and physicochemical properties, such as permanent nanoscale porosity, good thermal and chemical stability, and uniformly‐structured cavities . Recently, MOFs have emerged as promising materials for the building of biomimetic systems, such as novel artificial enzymes, because their uniform cavities can generate a high density of biomimetic active centers .…”

Section: Introductionmentioning

confidence: 99%

“…A mixed valence‐state Ce‐MOF that acts as an oxidase mimetic has been used in the colorimetric detection of biothiols . Cu‐MOF (HKUST‐1) shows peroxidase‐like activity and has been applied in a sensitive fluorescence assay for thiamine (vitamin B1) detection .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Copper‐based Metal‐organic Framework Applied in the Development of an Electrochemical Biomimetic Sensor for Catechol Determination

et al. 2017

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In this study, the synthesis and characterization of a Cu‐based metal‐organic framework (MOF) [Cu3(BTC)2(H2O)3]n (where BTC=benzene‐1,3,5‐tricarboxylate), known as HKUST‐1, were performed. The Cu‐MOF was applied in the modification of a carbon paste to obtain a biomimetic sensor for the electrochemical determination of catechol. Kinetic assays confirmed that the Cu‐MOF acts as a catalyst for the oxidation of catechol and it can be considered as a catechol oxidase mimetic. Under optimized conditions, the calibration curve for catechol presented a linear range of 8.0×10−7 to 3.2×10−5 mol L−1, with detection limit of=1.0×10−7 mol L−1. The sensor demonstrated good intra‐day repeatability and inter‐electrode reproducibility (relative standard deviations of 3.8 % (n=10) and 4.3 % (n=6), respectively). In the selectivity study, an adequate peak‐to‐peak separation was observed for hydroquinone and uric acid in relation to catechol, demonstrating that this sensor has the potential for use in the simultaneous determination of these compounds. This sensor was successfully applied in the determination of catechol in water samples.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Copper‐based Metal‐organic Framework Applied in the Development of an Electrochemical Biomimetic Sensor for Catechol Determination

et al. 2017

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“…It is extensively used as a component of single vitamin B complex and multivitamin preparations [2][3][4]. Several analytical methods, including UV and visible spectrophotometric and multivariate analysis [5][6][7], fluorimetric [8][9][10][11][12][13][14][15][16][17][18][19][20][21], high performance liquid chromatography (HPLC) [22][23][24][25][26][27][28][29][30][31][32][33][34][35], UHPLC/MS-MS [36], turbidimetric and nephelometric [37], amperometric [38], and voltammetric methods [39][40][41][42][43][44][45], have been used for the assay of thiamine and its salts in pharmaceutical preparations, food materials and biological fluids. Some of these methods have previously been reviewed [46][47][48]…”

Section: Introductionmentioning

confidence: 99%

Stability-Indicating Photochemical Method for the Assay of Thiamine by Spectrophotometry

Ahmad

Abbas

Anwar

et al. 2018

Journal of Spectroscopy

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A stability-indicating photochemical method has been developed for the assay of thiamine (TH) salts in aqueous solution and in fresh and aged vitamin preparations. It is based on the photooxidation of TH by UV irradiation to form thiochrome (TC) in alkaline solution. e TC : TH ratio under controlled conditions of light intensity, temperature, pH, exposure time, and irradiation distance is constant and can be used to determine the concentration of UV irradiated TH solutions. TC, on extraction with isobutanol from the photodegraded solution of TH, has been determined by the UV spectrophotometric method at 370 nm. It exhibits a high intensity of absorption in the UV region that can be used for the assay of even low concentrations of TH. Under optimum conditions, Beer's law is obeyed in the concentration range of 0.20-2.00 mg/100 ml (R 2 � 09998). e limit of detection (LOD) and limit of quantification (LOQ) are 0.0076 and 0.0231 mg/100 ml, respectively. e method has been validated and applied to aqueous solutions and vitamin preparations. e results have statistically been compared with the United States Pharmacopeia liquid chromatography method. It has been found that there is no significant difference between the two methods at 95% confidence level.

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“…Hybrids with catalytic activity based on different nanomaterials, such as iron oxide [1], metal-organic frameworks [2], grapheme [3], carbon nanotubes (CNTs) [4] have been successfully applied to various fields. Among these materials, CNTs have been extensively employed for synthesis of hybrid materials in sensing and catalysis due to their electrical conductivity, high chemical stability, unusual conjugated structure, and significant mechanical strength [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Intrinsic Catalytic Activity of Gold/Multi-Walled Carbon Nanotubes Composites in Squaric Acid-Iron(II/III) System

Jiang

Lin

et al. 2018

Catalysts

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Abstract:In this paper, gold/multi-walled carbon nanotube (Au/MWCNTs) composites were prepared via in situ reductions. The synthesized materials could effectively catalyze the system of square acid (SQA)-iron(II/III) to produce a significant color reaction. By designing the orthogonal test of three-factor and three-level, the three factors of sodium formate solution concentration, ultrasonic time and synthesis reaction time were optimized in the process of Au/MWCNTs preparation. Results showed that the Au/MWCNTs had the best catalytic activity under the conditions of sodium formate solution concentration of 400 mmol/L, ultrasonic for 30 min and reaction for 4 h. In a subsequent comparison with H 2 O 2 , it found that the catalytic performance of 1 mg of Au/MWCNTs composite was equivalent to that of H 2 O 2 with the concentration of 0.28 mmol/L. It demonstrated that the prepared Au/MWCNTs composites had good catalytic activity, stable color and low background noise, indicating a good prospect in various fields including that of catalytic reaction, sensing analysis, and nanomaterials labeling.

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A sensitive fluorescent assay for thiamine based on metal-organic frameworks with intrinsic peroxidase-like activity

Cited by 107 publications

References 41 publications

Copper‐based Metal‐organic Framework Applied in the Development of an Electrochemical Biomimetic Sensor for Catechol Determination

Copper‐based Metal‐organic Framework Applied in the Development of an Electrochemical Biomimetic Sensor for Catechol Determination

Stability-Indicating Photochemical Method for the Assay of Thiamine by Spectrophotometry

Intrinsic Catalytic Activity of Gold/Multi-Walled Carbon Nanotubes Composites in Squaric Acid-Iron(II/III) System

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