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Banaspati A, Ramu V, Raza MK, Goswami TK. Copper(ii) curcumin complexes for endoplasmic reticulum targeted photocytotoxicity. RSC Adv 2022; 12:30722-30733. [PMID: 36349155 PMCID: PMC9606729 DOI: 10.1039/d2ra04813b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 10/01/2022] [Indexed: 08/10/2023] Open
Abstract
Three copper(ii) complexes viz. [Cu(cur)(L)(ClO4)] (1-3), where Hcur is curcumin and L is 1,10-phenanthroline (phen, 1), dipyrido[3,2-d:2',3'-f]quinoxaline (dpq, 2), or dipyrido[3,2-a:2',3'-c]phenazine (dppz, 3) were synthesized, fully characterized by various physicochemical methods and evaluated for their light-assisted chemotherapeutic potential. The complexes [Cu(acac)(L)(ClO4)] (4-6), where Hacac is acetylacetone and L is phen (in 4), dpq (in 5) and dppz (in 6), were synthesized and used as controls. The solid state structures of complexes 4 and 5 were determined by single crystal X-ray diffraction. The curcumin complexes (1-3) were redox inactive at the copper centre, whereas the acetylacetonato complexes (4-6) displayed a Cu(ii)/Cu(i) couple at ∼0.1 V vs. Ag/AgCl reference electrode in DMF. Complexes 1-3 showed an intense curcumin-based band at ∼440 nm in DMF-Tris-HCl buffer (pH = 7.2) (1 : 9 v/v) which masks the copper based d-d band. The complexes bind to human serum albumin (HSA) with moderate efficacy. They also displayed significant binding affinity for calf-thymus (CT) DNA. The lipophilic curcumin complexes show remarkable visible light induced cytotoxicity (IC50 = ∼4 μM) with high phototoxic indices (PI) with low dark toxicity in human cervical carcinoma (HeLa) and human lung carcinoma (A549) cells. The corresponding acetylacetonato controls (4-6) did not show significant cytotoxicity in the dark or light. DCFDA and annexin V-FITC/PI assays using flow cytometry confirm the induction of significant apoptosis in cancer cells via generation of cytotoxic reactive oxygen species upon photoactivation. Confocal microscopic images using complex 3 demonstrate localization of the complexes predominantly in the endoplasmic reticulum of HeLa cells.
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Affiliation(s)
- Atrayee Banaspati
- Department of Chemistry, Gauhati University Guwahati 781014 Assam India
| | - Vanitha Ramu
- Department of Inorganic and Physical Chemistry, Indian Institute of Science Bangalore 560012 India
| | - Md Kausar Raza
- Department of Inorganic and Physical Chemistry, Indian Institute of Science Bangalore 560012 India
| | - Tridib K Goswami
- Department of Chemistry, Gauhati University Guwahati 781014 Assam India
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Joshi DJ, Lalrinhlupuii, Malek NI, Muthukumaran RB, Kailasa SK. Microwave-Assisted Synthesis of Red Emitting Copper Nanoclusters Using Trypsin as a Ligand for Sensing of Pb 2+ And Hg 2+ Ions in Water and Tobacco Samples. APPLIED SPECTROSCOPY 2022; 76:1234-1245. [PMID: 35477299 DOI: 10.1177/00037028221100544] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this work, a microwave assisted method was developed for synthesis of red fluorescent copper nanoclusters (NCs) using trypsin as a template (trypsin-Cu). The as-synthesized trypsin-Cu NCs are stable and water soluble, exhibiting fluorescence emission at 657 nm when excited at 490 nm. The as-prepared red-emitting trypsin-Cu NCs were characterized by using several analytical techniques such as ultraviolet-visible (UV-Vis) and fluorescence, fluorescence lifetime, Fourier transform infrared, and X-ray photoelectron spectroscopic techniques. Red-emitting trypsin-Cu NCs acted as a nanosensor for sensing both Pb2+ and Hg2+ ions through fluorescence quenching. Using this approach, good linearities are observed in the range of 0.1-25 and of 0.001-1 μM with the lower limit of detection of 14.63 and 56.81 nM for Pb2+ and Hg2+ ions, respectively. Trypsin-Cu NCs-based fluorescence assay was successfully applied to detect both Hg2+ and Pb2+ ions in water and tobacco samples.
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Affiliation(s)
- Dharaben J Joshi
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
| | - Lalrinhlupuii
- Department of Chemistry, 29670Mizoram University, Aizawl, India
| | - Naved I Malek
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
| | | | - Suresh Kumar Kailasa
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
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Dai R, Zhang Y, Huang K, Peng X. Recent advances in the visual detection of ions and molecules based on gold and silver nanoclusters. ANALYTICAL METHODS 2022; 14:2820-2832. [PMID: 35843220 DOI: 10.1039/d2ay00618a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Gold and silver nanoclusters (Au/AgNCs) exhibit excellent application potential in optical biosensors because of their low toxicity, excellent biocompatibility, and unique optical properties. Au/AgNCs-based visual analysis methods have emerged as powerful tools for detecting various targets with convenient readout. In this review, the applications of Au/AgNCs in the visual detection and bioimaging of metal ions, inorganic anions, small molecules, and biomacromolecules in various devices are summarized. Furthermore, this review also discusses the future perspectives of the field.
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Affiliation(s)
- Rui Dai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Yixin Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan, 610068, China
| | - Xian Peng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
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"Turn-off" sensing probe based on fluorescent gold nanoclusters for the sensitive detection of hemin. Anal Bioanal Chem 2021; 413:1639-1649. [PMID: 33483839 DOI: 10.1007/s00216-020-03126-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/09/2020] [Accepted: 12/14/2020] [Indexed: 01/18/2023]
Abstract
Balanced level of hemin in the body is fundamentally important for normal human organ function. Therefore, environmentally benign, stable, and fluorescent metal nanoclusters (NCs) for selective and sensitive detection of hemin have been investigated and reported. Herein, highly orange red emissive gold NCs are successfully synthesized using glutathione as a reducing and stabilizing agent (GSH-Au NCs). The clusters are characterized using various techniques like Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), UV-vis spectroscopy, and fluorescence spectrometer. The fluorescence intensity of as-synthesized Au NCs strongly quenched upon addition of different concentrations of hemin. The decrease in fluorescence intensity of GSH-Au NCs has been applied for determination of hemin concentration in the linear range from 1 to 25 nM with a low limit of detection (LOD) of 0.43 nM. The method was also successfully applied for quantification of hemin in human serum sample. In view of this reality, the system can be considered as a possible strategy and excellent platform for determination of hemin in various areas of application.
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González-Fuentes FJ, Molina GA, Silva R, López-Miranda JL, Esparza R, Hernandez-Martinez AR, Estevez M. Developing a CNT-SPE Sensing Platform Based on Green Synthesized AuNPs, Using Sargassum sp. SENSORS (BASEL, SWITZERLAND) 2020; 20:E6108. [PMID: 33121053 PMCID: PMC7662439 DOI: 10.3390/s20216108] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/26/2020] [Accepted: 10/26/2020] [Indexed: 01/30/2023]
Abstract
Detection and quantification of diverse analytes such as molecules, cells receptor and even particles and nanoparticles, play an important role in biomedical research, particularly in electrochemical sensing platform technologies. In this study, gold nanoparticles (AuNPs) prepared by green synthesis from Sargassum sp. were characterized using ultraviolet-visible (UV-Vis) and Fourier transform-infrared (FT-IR) spectroscopies, X-ray diffraction (XRD), scanning electron microscopy (SEM), dynamic light scattering (DLS) and zeta potential (ζ) obtaining organic capped face-centered cubic 80-100 nm AuNPs with an excellent stability in a wide range of pH. The AuNPs were used to modify a carbon nanotubes-screen printed electrode (CNT-SPE), through the drop-casting method, to assemble a novel portable electrochemical sensing platform for glucose, using a novel combination of components, which together have not been employed. The ability to sense and measure glucose was demonstrated, and its electrochemical fundamentals was studied using cyclic voltammetry (CV). The limits of detection (LOD) and quantification (LOQ) to glucose were 50 μM and 98 μM, respectively, and these were compared to those of other sensing platforms.
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Affiliation(s)
- Fanny J. González-Fuentes
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro 76230, Mexico; (F.J.G.-F.); (J.L.L.-M.); (R.E.); (A.R.H.-M.)
| | - Gustavo A. Molina
- Posgrado en Ciencia e Ingeniería de Materiales, Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro 76230, Mexico;
| | - Rodolfo Silva
- Instituto de Ingeniería, Universidad Nacional Autónoma de México, Edificio 17, Ciudad Universitaria, Coyoacán 04510, Mexico;
| | - José Luis López-Miranda
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro 76230, Mexico; (F.J.G.-F.); (J.L.L.-M.); (R.E.); (A.R.H.-M.)
| | - Rodrigo Esparza
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro 76230, Mexico; (F.J.G.-F.); (J.L.L.-M.); (R.E.); (A.R.H.-M.)
| | - Angel R. Hernandez-Martinez
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro 76230, Mexico; (F.J.G.-F.); (J.L.L.-M.); (R.E.); (A.R.H.-M.)
| | - Miriam Estevez
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro 76230, Mexico; (F.J.G.-F.); (J.L.L.-M.); (R.E.); (A.R.H.-M.)
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El-Sayed N, Schneider M. Advances in biomedical and pharmaceutical applications of protein-stabilized gold nanoclusters. J Mater Chem B 2020; 8:8952-8971. [PMID: 32901648 DOI: 10.1039/d0tb01610a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
The interest in using gold nanoclusters (AuNCs) as imaging probes is growing, covering wide ranges of applications. The stabilization of AuNCs with protein ligands enhances their biomedical and pharmaceutical applications. This is due to the biocompatibility, water solubility and bioactivity of proteins. Different factors can control the optical properties of AuNCs such as protein size, amino acids content and conformational structure. Controlling the synthesis conditions can result in tuning the AuNCs excitation, emission, fluorescence intensity and physicochemical properties to fulfill different applications. NIR-emitting protein-stabilized AuNCs are promising as imaging agents for targeting and visualization of cancer in vitro and in vivo. They are promising to be included as an important part of multifunctional theranostic nanosystems, due to their potential dual functions as imaging and photosensitizing agent for photodynamic therapy. Additionally, the protein around AuNCs represents a rich environment of active functional groups that are susceptible for conjugation with various biomolecules. Protein-AuNCs can act as fluorescent probes for rapid and selective analysis of different analytes in solution, cells or biological fluids. In conclusion, the variability of protein-AuNC applications can advance research in different biomedical and pharmaceutical fields.
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Affiliation(s)
- Nesma El-Sayed
- Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, Campus C4 1, D-66123 Saarbrücken, Germany. and Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, 21521 Alexandria, Egypt.
| | - Marc Schneider
- Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, Campus C4 1, D-66123 Saarbrücken, Germany.
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Banaspati A, Raza MK, Goswami TK. Ni(II) curcumin complexes for cellular imaging and photo-triggered in vitro anticancer activity. Eur J Med Chem 2020; 204:112632. [PMID: 32781350 DOI: 10.1016/j.ejmech.2020.112632] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 06/27/2020] [Accepted: 06/27/2020] [Indexed: 12/22/2022]
Abstract
Nickel(II) complexes [Ni(cur)(L)2](OAc) (1-3) where L is N,N-donor heterocyclic bases namely 1,10-phenanthroline (phen in 1), dipyrido[3,2-d:2',3'-f]quinoxaline (dpq in 2), dipyrido[3,2-a:2',3'-c]phenazine (dppz in 3) and Hcur is curcumin were prepared, fully characterized and light-induced in vitro anticancer activity studied. Three nickel(II) complexes containing acetylacetonato (Hacac) ligand, viz.[Ni(acac)(L)2](OAc) (4-6) where L is phen (in 4), dpq (in 5), dppz (in 6) were prepared and used as controls. Complex 4 was structurally characterized by single crystal X-ray diffraction technique, which revealed an octahedral NiN4O2 geometry around the metal centre. Complexes 1-3 showed an intense curcumin-based band at ∼440 nm in DMSO-Tris-HCl buffer (pH = 7.2) (1:4 v/v) which masks the nickel based d-d band. The curcumin comlexes (1-3) were redox inactive at the nickel centre, whereas the acetylacetonato complexes (4-6) displayed an irreversible voltammetric response at ∼1.00 V vs. Ag/AgCl reference electrode in DMF. The complexes bind to calf thymus DNA (ct-DNA) with considerable affinity and interacted with human serum albumin (HSA) with moderate affinity. The Ni(II) curcumin complexes display significant in vitro light-induced cytotoxicity in HeLa (human cervical carcinoma) and A549 (lung cancer cells) involving reactive oxygen species (ROS), with very low dark toxicity. The complexes were found to be much less toxic to immortalized lung epithelial normal cells (HPL1D). Confocal microscopic images using complex 2 and 3 showed that they primarily localize in the cytosol of A549 cells. The mechanism of cell death is mainly apoptosis in nature showing arrest of sub-G1 phase of cell cycle progression in A549 cells under visible light exposure and involves significant loss of mitochondrial membrane potential as observed from JC-1 assay.
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Affiliation(s)
- Atrayee Banaspati
- Department of Chemistry, Gauhati University, Guwahati, 781014, Assam, India
| | - Md Kausar Raza
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India.
| | - Tridib K Goswami
- Department of Chemistry, Gauhati University, Guwahati, 781014, Assam, India.
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Liu R, Duan S, Bao L, Wu Z, Zhou J, Yu R. Photonic crystal enhanced gold-silver nanoclusters fluorescent sensor for Hg 2+ ion. Anal Chim Acta 2020; 1114:50-57. [PMID: 32359514 DOI: 10.1016/j.aca.2020.04.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 03/01/2020] [Accepted: 04/02/2020] [Indexed: 01/16/2023]
Abstract
Luminescent nanoclusters (NCs) have attracted much attention because of their good photostability and low toxicity, however, the low quantum yield is still a deficiency, and many increasing efforts are being devoted to enhance the luminescence intensity of NCs. In this paper, a method of enhancing the fluorescent signal of gold-silver nanoclusters (AuAgNCs) by photonic crystals (PhCs) was proposed. The fluorescent intensity of AuAgNCs on PhCs can be enhanced 8.0-fold in comparison to the control sample without PhCs. Furthermore, a novel fluorescence sensor of AuAgNCs based on PhCs is used for the sensitive and selective detection of Hg2+ ion in the aqueous solution, the detection limit is 0.35 nM due to the PhCs enhancement effect for the fluorescence. This proposed method may not only develop a highly sensitive method for determination of Hg2+ ion, but also expand the application of AuAgNCs in ultra-trace analysis.
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Affiliation(s)
- Rong Liu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China; Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, PR China
| | - Shanshan Duan
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Lijiao Bao
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Zhaoyang Wu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China.
| | - Jun Zhou
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Ruqin Yu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
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Guo X, Huang J, Wei Y, Zeng Q, Wang L. Fast and selective detection of mercury ions in environmental water by paper-based fluorescent sensor using boronic acid functionalized MoS 2 quantum dots. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120969. [PMID: 31404893 DOI: 10.1016/j.jhazmat.2019.120969] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 08/01/2019] [Accepted: 08/03/2019] [Indexed: 06/10/2023]
Abstract
In this study, the B-MoS2 QDs, boronic acid functionalized MoS2 quantum dots, are synthesized by a simple aminoacylation reaction between MoS2 QDs and 3-aminobenzeneboronic acid (APBA). It not only exhibits excellent thermo-stability, photo-stability and good salt tolerance, but shows excellent fluorescence stability even under industrial wastewater with high concentration. These good characters can be used to construct a new fluorescence sensor for sensitive and selective detection of mercury ions (Hg2+). The fluorescence intensity of B-MoS2 QDs linearly decreases with the increase of Hg2+ concentration ranging from 0.005 to 41 μmol L-1, and the limit of detection as low as 1.8 nmol L-1. Due to the mercury ion-promoted transmetalation reaction of aryl boronic acid, this proposed method exhibits fast response, ultra-sensitivity and high selectivity for analysis of Hg2+ in different environmental water, and which also uses to online monitoring of Hg2+. The B-MoS2 QDs-based test paper can be used to detect the trace amounts of Hg2+ under UV lamp by naked eyes, suggesting that the proposed method has potential application in on-site monitoring of environmental Hg2+.
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Affiliation(s)
- Xinrong Guo
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China
| | - Jianzhi Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China
| | - Yubo Wei
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China
| | - Qiang Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China
| | - Lishi Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China.
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Kirar S, Thakur NS, Laha JK, Banerjee UC. Porphyrin Functionalized Gelatin Nanoparticle-Based Biodegradable Phototheranostics: Potential Tools for Antimicrobial Photodynamic Therapy. ACS APPLIED BIO MATERIALS 2019; 2:4202-4212. [DOI: 10.1021/acsabm.9b00493] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Development of sensing method for mercury ions and cell imaging based on highly fluorescent gold nanoclusters. Microchem J 2019. [DOI: 10.1016/j.microc.2019.02.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Duan B, Wang M, Li Y, Jiang S, Liu Y, Huang Z. Dual-emitting zein-protected gold nanoclusters for ratiometric fluorescence detection of Hg2+/Ag+ ions in both aqueous solution and self-assembled protein film. NEW J CHEM 2019. [DOI: 10.1039/c9nj03524a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
An abundant plant-sourced protein, zein, is used to prepare fluorescent Au nanoclusters as a promising alternative to animal/microorganism proteins.
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Affiliation(s)
- Bohui Duan
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Min Wang
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yue Li
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Shan Jiang
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yanmei Liu
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Zhenzhen Huang
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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