1
|
Zhang C, Wang D, Chen Y, Che G, Li M, Yang W, Su Z. Highly selective fluorescence turn-on sensor for·thiol compounds detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 320:124667. [PMID: 38906059 DOI: 10.1016/j.saa.2024.124667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 06/01/2024] [Accepted: 06/15/2024] [Indexed: 06/23/2024]
Abstract
As a kind of commonly-used synthetic materials for many pesticides, thiol compounds, once being leaked, can cause serious harm to the environment and humans. Therefore, the efficient detection of thiol compounds is essential. In this study developed a turn-on fluorescent probe (Cu@Zn-CP) for the highly sensitive fluorescence detection of thiol compounds. The probe was constructed based on a zinc coordination polymer (Zn-CP), whose fluorescence was quenched through the effective doping of Cu2+ ions. After the introduction of methyl thioglycolate (MTC), a rapid fluorescence turn-on response was generated within 90 s with a low detection limit of 23 ppb. Even after being reused for five cycles, the sensor maintains excellent detection performance and demonstrates good recyclability. It can also detect MTC in river water, with a spike recovery rate between 98-103 %. Furthermore, the designed Cu@Zn-CP exhibits good universality for detecting multifarious thiol compounds, including L-cysteine, glutathione, monothioglycerol, and 2-hydroxy-1-ethanethiol. This result provides a potential recyclable fluorescent sensor for thiol compounds.
Collapse
Affiliation(s)
- Chaowei Zhang
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China
| | - Dandan Wang
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China
| | - Yiduo Chen
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China
| | - Guang Che
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China
| | - Meiling Li
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China
| | - Weiting Yang
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China.
| | - Zhongmin Su
- Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China
| |
Collapse
|
2
|
Ding Q, Yang W, Xing X, Lin H, Xu C, Xu L, Li S. Modulation by Co (II) Ion of Optical Activities of L/D-glutathione (GSH)-modified Chiral Copper Nanoclusters for Sensitive Adenosine Triphosphate Detection. Angew Chem Int Ed Engl 2024; 63:e202401032. [PMID: 38438340 DOI: 10.1002/anie.202401032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/03/2024] [Accepted: 03/03/2024] [Indexed: 03/06/2024]
Abstract
Chiral nanoscale enantiomers exhibit different biological effects in living systems. However, their chirality effect on the detection sensitivity for chiral biological targets still needs to be explored. Here, we discovered that Co2+ can modulate the luminescence performance of L/D-glutathione (GSH)-modified copper nanoclusters (L/D-Cu NCs) and induce strong chiroptical activities as the asymmetric factor was enhanced 223-fold with their distribution regulating from the ultraviolet to visible region. One Co2+ coordinated with two GSH molecules that modified on the surface of Cu NCs in the way of CoN2O2. On this basis, dual-modal chiral and luminescent signals of Co2+ coordinated L/D-Cu NCs (L/D-Co-Cu NCs) were used to detect the chiral adenosine triphosphate (ATP) based on the competitive interaction between surficial GSH and ATP molecules with Co2+. The limits of detection of ATP obtained with fluorescence and circular dichroism intensity were 9.15 μM and 15.75 nM for L-Co-Cu NCs, and 5.35 μM and 4.69 nM for D-Co-Cu NCs. This demonstrated that selecting suitable chiral configurations of nanoprobes effectively enhances detection sensitivity. This study presents not only a novel method to modulate and enhance the chiroptical activity of nanomaterials but also a unique perspective of chirality effects on the detection performances for bio-targets.
Collapse
Affiliation(s)
- Qi Ding
- International Joint Research Center for Photo-responsive Molecules and Materials, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection, State Key Laboratory of Food Science and Technology, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
| | - Weimin Yang
- International Joint Research Center for Photo-responsive Molecules and Materials, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
| | - Xinhe Xing
- International Joint Research Center for Photo-responsive Molecules and Materials, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
| | - Hengwei Lin
- International Joint Research Center for Photo-responsive Molecules and Materials, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
| | - Chuanlai Xu
- International Joint Research Laboratory for Biointerface and Biodetection, State Key Laboratory of Food Science and Technology, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
| | - Liguang Xu
- International Joint Research Laboratory for Biointerface and Biodetection, State Key Laboratory of Food Science and Technology, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
| | - Si Li
- International Joint Research Center for Photo-responsive Molecules and Materials, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection, State Key Laboratory of Food Science and Technology, Jiangnan University, 214122, Wuxi, Jiangsu, P. R. China
| |
Collapse
|
3
|
Tian R, Chen J, Li D, Sun X, Ma H. Preparation of chitosan/SiO 2 coated silver nanoclusters and its application in enhanced fluorescence detection of berberine hydrochloride. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123417. [PMID: 37774585 DOI: 10.1016/j.saa.2023.123417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 07/10/2023] [Accepted: 09/13/2023] [Indexed: 10/01/2023]
Abstract
Although the synthesis and applications of the metal nanoclusters and silica coated metal noclusters were widely explored, however, the fluorescence sensing application of silica coated metal nanoclusters are still challenges. In this work, the composite nanoparticles (PEI-Ag NCs/CSNPs) were synthesized by coating polyethyleneimine capped silver nanoclusters (PEI-Ag NCs) with chitosan/silica through a reverse microemulsion method, and then used for fluorescence enhancement detection of berberine hydrochloride (BRH). UV-vis absorption spectra, fluorescence spectra, IR spectra, transmission electron microscope (TEM) and X-ray Photoelectron Spectroscopy (XPS) technique were used to reveal the possible binding relationship between PEI-AgNCs and chitosan/silica and fluorescence sensing mechanism of PEI-Ag NCs/CSNPs to BRH. The results showed that PEI-Ag NCs/CSNPs possess better sensing ability as compared to the free PEI- Ag NCs and can be successfully applied to evaluate the BRH content in actual medicine.
Collapse
Affiliation(s)
- Rui Tian
- School of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shannxi 716000, PR China.
| | - Junyu Chen
- School of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shannxi 716000, PR China
| | - Duo Li
- School of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shannxi 716000, PR China
| | - Xuehua Sun
- School of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shannxi 716000, PR China
| | - Hongyan Ma
- School of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shannxi 716000, PR China
| |
Collapse
|
4
|
Li W, Wang Y, Zhang R. Theoretical investigation on the sensing mechanism of a triphenylamine-benzofuran derived fluorescent probe for the detection of H 2S n. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 302:123125. [PMID: 37478759 DOI: 10.1016/j.saa.2023.123125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/07/2023] [Accepted: 07/08/2023] [Indexed: 07/23/2023]
Abstract
As one of the members of reactive sulfur species, hydrogen polysulfide (H2Sn, n > 1) plays an important role in enzyme activity and nervous system regulations, and the sensing mechanism study is of great significance for the design of novel efficient probes. Herein, we investigated the sensing mechanism of an efficient triphenylamine-benzofuran-based probe (TBF-SS) towards H2Sn using DFT method. The inherent fluorescence quenching of the probe is dominated by the twisted intramolecular charge transfer (TICT) as revealed by the torsional potential curve calculations. When the nitro fluorophenyl group is replaced by a hydroxyl group in the reaction with H2Sn, the TICT is eliminated and the excited state can return to the ground state in a radiative way, leading to strong fluorescence emission.
Collapse
Affiliation(s)
- Wenzhi Li
- Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, PR China
| | - Yuxi Wang
- Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, PR China
| | - Ruiling Zhang
- Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, PR China.
| |
Collapse
|
5
|
Fu L, Huang H, Zuo Z, Peng Y. A Single Organic Fluorescent Probe for the Discrimination of Dual Spontaneous ROS in Living Organisms: Theoretical Approach. Molecules 2023; 28:6983. [PMID: 37836826 PMCID: PMC10574373 DOI: 10.3390/molecules28196983] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/19/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023] Open
Abstract
Single-organic-molecule fluorescent probes with double-lock or even multi-lock response modes have attracted the attention of a wide range of researchers. The number of corresponding reports has rapidly increased in recent years. The effective application of the multi-lock response mode single-molecule fluorescent probe has improved the comprehensive understanding of the related targets' functions or influences in pathologic processes. Building a highly efficient functional single-molecule fluorescent probe would benefit the diagnosis and treatment of corresponding diseases. Here, we conducted a theoretical analysis of the synthesizing and sensing mechanism of this kind of functional single-molecule fluorescent probe, thereby guiding the design and building of new efficient probes. In this work, we discuss in detail the electronic structure, electron excitation, and fluorescent character of a recently developed single-molecule fluorescent probe, which could achieve the discrimination and profiling of spontaneous reactive oxygen species (ROS, •OH, and HClO) simultaneously. The theoretical results provide insights that will help develop new tools for fluorescent diagnosis in biological and medical fields.
Collapse
Affiliation(s)
| | | | | | - Yongjin Peng
- Modern Industry School of Health Management, Jinzhou Medical University, Jinzhou 121001, China
| |
Collapse
|
6
|
Zhu X, Liu L, Cao W, Yuan R, Wang H. Ultra-Sensitive MicroRNA Biosensor Based on Strong Aggregation-Induced Electrochemiluminescence from Bidentate Ligand-Stabilized Copper Nanoclusters in Polymer Hydrogel. Anal Chem 2023; 95:5553-5560. [PMID: 36947675 DOI: 10.1021/acs.analchem.2c04565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
Herein, dihydrolipoic acid (DHLA)-stabilized copper nanoclusters (Cu NCs) with high aggregation-induced electrochemiluminescence (AIECL) in polymer hydrogel were prepared to construct an ECL biosensor for detection of microRNA-21. DHLA, a small molecule ligand with two sulfhydryl groups, was used as a protective agent to synthesize Cu NCs, which improved the ECL stability and intensity of Cu NCs. Furthermore, the Cu NCs were loaded into the (PVP-PVA)hydrogel to form the DHLA-Cu NCs@(PVP-PVA)hydrogel composite, which showed effective AIECL performance. The confinement of Cu NCs into the hydrogel increased the local concentration of Cu NCs, which could not only prevent oxides from entering the copper core, but also limit the vibration to reduce non-radiative transitions of Cu NCs, leading to a distinct AIECL emission. Then, combined with the self-priming clip trigger isothermal amplification (SCTIA) technology, an ECL biosensor was constructed to realize the sensitive detection of miRNA-21. Interestingly, SCTIA technology was a simple and efficient strategy that realized multiple-cycle amplified processes to acquire a mass of output DNA, achieving remarkable signal amplification. Therefore, this strategy provided an efficient approach in the preparation of Cu NCs with high AIECL emission and target amplification technology, which might have promising potential in clinical application.
Collapse
Affiliation(s)
- Xin Zhu
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Linlei Liu
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Weiwei Cao
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Ruo Yuan
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Haijun Wang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| |
Collapse
|
7
|
Zhang W, Sun DW, Ma J, Cheng J, Wang Z, Tang BZ. A volatile basic nitrogens-responsive tag based on aggregation-induced emission luminogen for real-time monitoring and In situ visualization of salmon freshness. Anal Chim Acta 2022; 1221:340122. [DOI: 10.1016/j.aca.2022.340122] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/20/2022] [Accepted: 06/22/2022] [Indexed: 11/30/2022]
|
8
|
Li X, Wang X, Guo W, Wang Y, Hua Q, Tang F, Luan F, Tian C, Zhuang X, Zhao L. Selective Detection of Alkaline Phosphatase Activity in Environmental Water Samples by Copper Nanoclusters Doped Lanthanide Coordination Polymer Nanocomposites as the Ratiometric Fluorescent Probe. BIOSENSORS 2022; 12:372. [PMID: 35735520 PMCID: PMC9221544 DOI: 10.3390/bios12060372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 05/17/2022] [Accepted: 05/27/2022] [Indexed: 06/15/2023]
Abstract
In this paper, a novel, accurate, sensitive and rapid ratiometric fluorescent sensor was fabricated using a copper nanoclusters@infinite coordination polymer (ICP), specifically, terbium ion-guanosine 5'-disodium (Cu NCs@Tb-GMP) nanocomposites as the ratiometric fluorescent probe, to detect alkaline phosphatase (ALP) in water. The fluorescence probe was characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The experimental results showed that, compared with Tb-GMP fluorescent sensors, Cu ratiometric fluorescent sensors based on NCs encapsulated in Tb-GMP had fewer experimental errors and fewer false-positive signals and were more conducive to the sensitive and accurate detection of ALP. In addition, the developed fluorescent probe had good fluorescence intensity, selectivity, repeatability and stability. Under optimized conditions, the ratiometric fluorescent sensor detected ALP in the range of 0.002-2 U mL-1 (R2 = 0.9950) with a limit of detection of 0.002 U mL-1, and the recovery of ALP from water samples was less than 108.2%. These satisfying results proved that the ratiometric fluorescent probe has good application prospects and provides a new method for the detection of ALP in real water samples.
Collapse
Affiliation(s)
- Xin Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| | - Xiaoling Wang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| | - Wei Guo
- Shandong Dyne Marine Biopharmaceutical Co., Ltd., Weihai 264300, China
| | - Yunfei Wang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| | - Qing Hua
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| | - Feiyan Tang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| | - Feng Luan
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| | - Chunyuan Tian
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| | - Xuming Zhuang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| | - Lijun Zhao
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China; (X.L.); (X.W.); (Y.W.); (Q.H.); (F.T.); (F.L.); (C.T.)
| |
Collapse
|
9
|
Chen B, Yang Z, Qu X, Zheng S, Yin D, Fu H. Screening and Discrimination of Perfluoroalkyl Substances in Aqueous Solution Using a Luminescent Metal-Organic Framework Sensor Array. ACS APPLIED MATERIALS & INTERFACES 2021; 13:47706-47716. [PMID: 34605622 DOI: 10.1021/acsami.1c15528] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The extensive production and large-scale use of perfluoroalkyl substances (PFASs) have raised their presence in aquatic environments worldwide. Thus, the facile and reliable screening of PFASs in aqueous systems is of great significance. Herein, we designed a novel fluorescent sensor array for the rapid screening and discrimination of multiple PFASs in water. The sensor array comprised three highly stable zirconium porphyrinic luminescent metal-organic frameworks (i.e., PCNs) with different topological structures. The sensing mechanism was based on the static fluorescence quenching of PCNs by PFASs upon their adsorptive interactions. The fluorescence response patterns were characteristic for each PFAS because of their different adsorption affinities toward different PCNs. Through the interpretation of response patterns by statistical methods, the proposed PCN array successfully discriminated six different kinds of PFASs, each PFAS at different concentrations and PFAS mixtures at different molar ratios. The practicability of this array was further verified by effectively discriminating PFASs in two real water samples. Remarkably, the PCN sensors exhibited a very short response time toward PFASs (within 10 s) due to the ordered pore structure allowing fast PFAS diffusion. This study not only provides a facile method for rapid PFAS screening in waters but also broadens the application of luminescent metal-organic frameworks and array techniques in sensing fields.
Collapse
Affiliation(s)
- Beining Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210046, China
| | - Zhengshuang Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210046, China
| | - Xiaolei Qu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210046, China
| | - Shourong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210046, China
| | - Daqiang Yin
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Heyun Fu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210046, China
| |
Collapse
|
10
|
Ren HX, Qian ZJ, Li M, Peng CF, Wang ZP, Wei XL, Xu JG. Mesoporous silica-loaded gold nanocluster with enhanced fluorescence and ratiometric fluorescent detection of thiram in foods. Mikrochim Acta 2021; 188:363. [PMID: 34606019 DOI: 10.1007/s00604-021-05028-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/13/2021] [Indexed: 01/31/2023]
Abstract
A core-shell QDs@mSiO2@y-AuNCs nanoprobe was prepared, and a new ratiometric fluorescent sensor for thiram detection was developed. The mechanism of thiram sensing was investigated using FTIR, surface-enhanced Raman, XPS spectra, etc. The sensing of thiram was mainly ascribed to the formation of Au-S bonds between thiram and Au atoms on y-AuNCs surface, resulting in the dissociation of 11-MUA ligand from the y-AuNCs surface and the charge transfer between thiram and y-AuNCs. In the ratiometric fluorescence detection of thiram based on QDs@mSiO2@y-AuNCs, a linear range of 0.5-60 ng/mL was obtained with a LOD of 0.19 ng/mL. Compared with the fluorescence detection based on y-AuNCs, the ratiometric fluorescence detection of thiram demonstrated 3-fold enhanced sensitivity. The improvement was ascribed to two aspects: the fluorescence emission of y-AuNCs was enhanced after they were loaded onto the QDs@mSiO2 nanoparticles; the ratiometric detection mode provided more precise sensing. The detection of thiram can be completed immediately after mixing the nanoprobe with thiram. Good recoveries of thiram in apple and pear samples were achieved. All the above results demonstrated the high potential of this method in practical applications.
Collapse
Affiliation(s)
- Hong-Xin Ren
- State Key Laboratory of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China.,School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China
| | - Zhi-Juan Qian
- Nanjing Customs District Light Industry Products and Children's Products Inspection Center, Yangzhou, 225009, P. R, China
| | - Min Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China.,School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China
| | - Chi-Fang Peng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China. .,School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China. .,International Joint Laboratory On Food Safety, Jiangnan University, Lihu Road, 1800, Wuxi, 214122, P. R, China.
| | - Zhou-Ping Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China.,School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China.,International Joint Laboratory On Food Safety, Jiangnan University, Lihu Road, 1800, Wuxi, 214122, P. R, China
| | - Xin-Lin Wei
- School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai, 200240, P. R, China
| | - Jian-Guo Xu
- School of Food Science and Biological Engineering, Hefei University of Technology, Hefei, 230009, P. R, China.
| |
Collapse
|