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Sun H, Zhou Y, Ren J, Qu X. Carbon Nanozymes: Enzymatic Properties, Catalytic Mechanism, and Applications. Angew Chem Int Ed Engl 2018; 57:9224-9237. [DOI: 10.1002/anie.201712469] [Citation(s) in RCA: 306] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 02/01/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Hanjun Sun
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun Jilin 130022 China
- University of Chinese Academy of Sciences; Beijing 100039 China
| | - Ya Zhou
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun Jilin 130022 China
- University of Science and Technology of China; Hefei Anhui 230026 China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun Jilin 130022 China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun Jilin 130022 China
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A nanoporous palladium(II) bridged coordination polymer acting as a peroxidase mimic in a method for visual detection of glucose in tear and saliva. Mikrochim Acta 2018; 185:245. [DOI: 10.1007/s00604-018-2776-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 03/16/2018] [Indexed: 10/17/2022]
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Li M, Yang J, Ou Y, Shi Y, Liu L, Sun C, Zheng H, Long Y. Peroxidase-like activity of 2',7'-difluorofluorescein and its application for galactose detection. Talanta 2018; 182:422-427. [PMID: 29501173 DOI: 10.1016/j.talanta.2018.02.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/29/2018] [Accepted: 02/06/2018] [Indexed: 01/19/2023]
Abstract
The peroxidase-like activity of 2',7'-difluorofluorescein (DFF), was investigated using 3,3',5,5'-tetramethylbenzidine (TMB) as a chromogenic substrate in the presence of H2O2. DFF could catalyze oxidization of TMB by H2O2 to produce a blue colored oxidation product. Effect of various reaction conditions, such as pH, temperature, H2O2 concentration and reaction time on the catalytic activity of DFF was studied. The peroxidase-like activity of DFF was found to follow Michaelis-Menten kinetics, and its catalysis accorded with ping-pong mechanism. The calculated kinetic parameters (Kcat) of DFF catalysis showed higher peroxidase-like activity than fluorescein and 2',7'-dichlorofluorescein (DCF). According to the radical capture and electron spin resonance (ESR) spectroscopy results, we confirmed that hydroxyl radical (•OH) is the active specie of catalytic process. It is known that the oxidation of galactose by galactose oxidase (GAOx) enzyme leads to the formation of H2O2, the H2O2 released in this reaction was consequently quantified using DFF as peroxides mimics and TMB as the chromogen. Thus, a combination of above two reactions was exploited to establish a method for galactose detection. Under the optimum conditions, the linear range of this method was from 10 μM to 20 mM with the detection limit down to 3 μM. Moreover, the developed method was applied to detect galactose in urine samples. Our work will facilitate the utilization of DFF intrinsic peroxidase-like activity in medical diagnostics and biotechnology.
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Affiliation(s)
- Menglu Li
- Key Laboratory on Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Juan Yang
- Key Laboratory on Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yining Ou
- Key Laboratory on Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Ying Shi
- Key Laboratory on Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Li Liu
- Key Laboratory on Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Chaoqun Sun
- Key Laboratory on Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Huzhi Zheng
- Key Laboratory on Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yijuan Long
- Key Laboratory on Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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