51
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Aulsebrook ML, Graham B, Grace MR, Tuck KL. The synthesis of luminescent lanthanide-based chemosensors for the detection of zinc ions. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.078] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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52
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Borisova NE, Kostin AA, Eroshkina EA, Reshetova MD, Lyssenko KA, Spodine EN, Puntus LN. Lanthanide Complexes with Tetradentate
N
,
N′
,
O
,
O′
‐Dipyridyl‐Based Ligands: Structure, Stability, and Photophysical Properties. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301271] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nataliya E. Borisova
- Chemistry Department, M. V. Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation, http://fhmas.chem.msu.ru
| | - Andrey A. Kostin
- Chemistry Department, M. V. Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation, http://fhmas.chem.msu.ru
| | - Elizaveta A. Eroshkina
- Chemistry Department, M. V. Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation, http://fhmas.chem.msu.ru
| | - Marina D. Reshetova
- Chemistry Department, M. V. Lomonosov Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russian Federation, http://fhmas.chem.msu.ru
| | - Konstantin A. Lyssenko
- N. A. Nesmeyanov Institute of Organoelement Compounds, Vavilova st. 28, 119334 Moscow, Russia
| | - Evgenia N. Spodine
- Faculty of Chemical and Pharmaceutical Sciences, University of Chile, Center for the Development of Nanoscience and Nanotechnology (CEDENNA), Sergio Livingstone P. 1007, Independencia, Santiago, Chile
| | - Lada N. Puntus
- N. A. Nesmeyanov Institute of Organoelement Compounds, Vavilova st. 28, 119334 Moscow, Russia
- Kotel'nikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences, Mokhovaya st. 11‐7, 125009 Moscow, Russia
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53
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Aguilar-Vázquez L, Aguilar-Caballos M, Gómez-Hens A. Development of an automatic high-throughput assay for tetracycline determination by using Eu2O3 nanoparticles and dry-reagent technology. Talanta 2014; 119:111-5. [DOI: 10.1016/j.talanta.2013.10.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 10/01/2013] [Accepted: 10/15/2013] [Indexed: 11/26/2022]
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54
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Xue FM, Liang MH, Wang ZH, Luan LY, Li FW, Cheng Y, Shao GS. The preparation and performance of visible-light-sensitized luminescent nanoparticles based on europium complex. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2013.10.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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55
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Vuojola J, Soukka T. Luminescent lanthanide reporters: new concepts for use in bioanalytical applications. Methods Appl Fluoresc 2014; 2:012001. [DOI: 10.1088/2050-6120/2/1/012001] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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56
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Tian L, Dai Z, Ye Z, Song B, Yuan J. Preparation and functionalization of a visible-light-excited europium complex-modified luminescent protein for cell imaging applications. Analyst 2014; 139:1162-7. [PMID: 24443719 DOI: 10.1039/c3an02078a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Lanthanide complex-based luminescent bioprobes have shown great utility in a variety of time-resolved luminescence bioassays, but these bioprobes often require UV excitation and suffer from problems related to bioaffinity and biocompatibility for in vivo applications. In this work, a new visible-light-excited europium(III) complex with the maximum excitation wavelength over 400 nm, BHHBB-Eu(3+)-BPT {BHHBB: 1,2-bis[4'-(1'',1'',1'',2'',2'',3'',3''-heptafluoro-4'',6''-hexanedion-6''-yl)-benzyl]-benzene; BPT: 2-(N,N-diethylanilin-4-yl)-4,6-bis(pyrazol-1-yl)-1,3,5-triazine}, has been synthesized for the preparation of an artificial luminescent protein that can be used as a visible-light-excited luminescent bioprobe for cell imaging. By encapsulating BHHBB-Eu(3+)-BPT into apoferritin with a simple dissociation-reassembly method, the luminescent protein, Eu@AFt, with a maximum excitation peak at 420 nm and a long luminescence lifetime of 365 μs was fabricated and successfully used for visible-light-excited time-resolved luminescence cell imaging. Moreover, by conjugating a mitochondria-targeting molecule, (5-N-succinimidoxy-5-oxopentyl)-triphenylphosphonium bromide (SPTPP), onto the surface of Eu@AFt, a mitochondria-specifically-tracking luminescent probe, Eu@AFt-SPTPP, was further prepared and used for visible-light-excited confocal luminescence microscopy imaging to visualize the mitochondria of living cells.
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Affiliation(s)
- Lu Tian
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China.
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57
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Jin D, Lu Y, Leif RC, Yang S, Rajendran M, Miller LW. How to build a time-gated luminescence microscope. ACTA ACUST UNITED AC 2014; 67:2.22.1-2.22.36. [PMID: 24510771 DOI: 10.1002/0471142956.cy0222s67] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The sensitivity of filter-based fluorescence microscopy techniques is limited by autofluorescence background. Time-gated detection is a practical way to suppress autofluorescence, enabling higher contrast and improved sensitivity. In the past few years, three groups of authors have demonstrated independent approaches to build robust versions of time-gated luminescence microscopes. Three detailed, step-by-step protocols are provided here for modifying standard fluorescent microscopes to permit imaging time-gated luminescence.
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Affiliation(s)
- Dayong Jin
- Advanced Cytometry Laboratories, MQ BioFocus Research Centre & Photonics Research Centre, Macquarie University, New South Wales, Australia
| | - Yiqing Lu
- Advanced Cytometry Laboratories, MQ BioFocus Research Centre & Photonics Research Centre, Macquarie University, New South Wales, Australia
| | | | - Sean Yang
- Newport Instruments, San Diego, California
| | - Megha Rajendran
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois
| | - Lawrence W Miller
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois
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58
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Palmer AJ, Ford SH, Butler SJ, Hawkins TJ, Hussey PJ, Pal R, Walton JW, Parker D. Emissive europium complexes that stain the cell walls of healthy plant cells, pollen tubes and roots. RSC Adv 2014. [DOI: 10.1039/c3ra45426f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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59
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Cosquer G, Pointillart F, Jung J, Le Guennic B, Golhen S, Cador O, Guyot Y, Brenier A, Maury O, Ouahab L. Alkylation Effects in Lanthanide Complexes Involving Tetrathiafulvalene Chromophores: Experimental and Theoretical Correlation between Magnetism and Near-Infrared Emission. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201301358] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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60
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Dai Z, Tian L, Ye Z, Song B, Zhang R, Yuan J. A Lanthanide Complex-Based Ratiometric Luminescence Probe for Time-Gated Luminescence Detection of Intracellular Thiols. Anal Chem 2013; 85:11658-64. [DOI: 10.1021/ac403370g] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Zhichao Dai
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Lu Tian
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Zhiqiang Ye
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Bo Song
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Run Zhang
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Jingli Yuan
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China
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61
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Gu YJ, Yan B. Europium (III) complex functionalized Si-MCM-41 hybrid materials with visible-light-excited luminescence. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.09.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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62
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Indapurkar A, Henriksen B, Tolman J, Fletcher J. Evaluation of triazole-chelated lanthanides as chemically stabile bioimaging agents. J Pharm Sci 2013; 102:2589-98. [PMID: 23761019 DOI: 10.1002/jps.23616] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 04/12/2013] [Accepted: 04/30/2013] [Indexed: 11/09/2022]
Abstract
Europium (Eu), dysprosium (Dy), samarium (Sm), and terbium (Tb) complexes were prepared using the neutral tridentate chelator 2,6-bis(1-benzyl-1,2,3-triazol-4-yl)pyridine and one equivalent of each lanthanide salt. The physicochemical, aerodynamic, and in vitro cellular properties of each lanthanide metal complex were studied to determine their viability as cell surface fluorescent probes. Each compound was characterized by electrospray ionization mass spectroscopy (ESI-MS), ultraperformance liquid chromatography (UPLC), differential scanning calorimetry (DSC), and thermogravimetic analysis (TGA). Upon excitation at 320 nm each complex displayed characteristic lanthanide-based fluorescence emission in the visible wavelength range with stokes shifts greater than 200 nm. Each complex was found to be chemically stable when exposed to pH range of 1-11 for 72 h and resistant to photobleaching. To simulate pulmonary administration of these fluorophores, the aerodynamic properties of the Eu and Tb complexes were determined using a next generation impactor (NGI). This measurement confirmed that the complexes retain their fluorescence emission properties after nebulization. Cellular cytotoxicity was determined on A-549 lung cancer cell line using methylthiazol tetrazolium (MTT) cytotoxicity assay at 24, 48, and 72 h postexposure to the complexes. The complexes showed a dose and time-dependent effect on the percent viability of the cells.
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Affiliation(s)
- Amruta Indapurkar
- School of Pharmacy and Health Professions, Creighton University, Omaha, Nebraska 68178, USA
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63
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Sreenivasan VKA, Zvyagin AV, Goldys EM. Luminescent nanoparticles and their applications in the life sciences. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:194101. [PMID: 23611923 DOI: 10.1088/0953-8984/25/19/194101] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Nanoparticles have recently emerged as an important group of materials used in numerous disciplines within the life sciences, ranging from basic biophysical research to clinical therapeutics. Luminescent nanoparticles make excellent optical bioprobes significantly extending the capabilities of alternative fluorophores such as organic dyes and genetically engineered fluorescent proteins. Their advantages include excellent photostability, tunable and narrow spectra, controllable size, resilience to environmental conditions such as pH and temperature, combined with a large surface for anchoring targeting biomolecules. Some types of nanoparticles provide enhanced detection contrast due to their long emission lifetime and/or luminescence wavelength blue-shift (anti-Stokes) due to energy upconversion. This topical review focuses on four key types of luminescent nanoparticles whose emission is governed by different photophysics. We discuss the origin and characteristics of optical absorption and emission in these nanoparticles and give a brief account of synthesis and surface modification procedures. We also introduce some of their applications with opportunities for further development, which could be appreciated by the physics-trained readership.
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64
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Zhang L, Tian L, Ye Z, Song B, Yuan J. Preparation of visible-light-excited europium biolabels for time-resolved luminescence cell imaging application. Talanta 2013; 108:143-9. [DOI: 10.1016/j.talanta.2013.02.065] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 02/21/2013] [Accepted: 02/27/2013] [Indexed: 10/27/2022]
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65
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Abstract
Coordination chemistry plays an essential role in the design of photoluminescent probes for metal ions. Metal coordination to organic dyes induces distinct optical responses which signal the presence of metal species of interest. Luminescent lanthanide (Ln(3+)) and transition metal complexes of d(6), d(8) and d(10) configurations often exhibit unique luminescence properties different from organic dyes, such as high quantum yield, large Stokes shift, long emission wavelength and emission lifetimes, low sensitivity to microenvironments, and can be explored as lumophores to construct probes for metal ions, anions and neutral species. In this review, the design principles and coordination chemistry of metal probes based on mechanisms of PeT, PCT, ESIPT, FRET, and excimer formation will be discussed in detail. Particular attention will be given to rationales for the design of turn-on and ratiometric probes. Moreover, phosphorescent probe design based on Ln(3+) and d(6), d(8) and d(10)-metal complexes are also presented via discussing certain factors affecting the phosphorescence of these metal complexes. A survey of the latest progress in photoluminescent probes for identification of essential metal cations in the human body or toxic metal cations in the environment will be presented focusing on their design rationales and sensing behaviors. Metal complex-based photoluminescent probes for biorelated anions such as PPi, and neutral biomolecules ATP, NO, and H(2)S will be discussed also in the context of their metal coordination-related sensing behaviors and design approaches.
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Affiliation(s)
- Zhipeng Liu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
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66
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Zhang Z, Liu JF, Feng TT, Yao Y, Gao LH, Jiang GB. Time-resolved fluoroimmunoassay as an advantageous analytical method for assessing the total concentration and environmental risk of fluoroquinolones in surface waters. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:454-462. [PMID: 23214456 DOI: 10.1021/es303858a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Due to the widespread occurrence in the environment and potential risk toward organisms of fluoroquinolones (FQs), it is of importance to develop high efficient methods for assessing their occurrence and environmental risk. A monoclonal antibody (Mab) with broad cross-reactivity to FQs was produced by immunizing BALB/c mice with a synthesized immunogen prepared by conjugating ciprofloxacin with bovine serum albumin. This developed Mab (C2F3C2) showed broad and high cross-reactivity (40.3-116%) to 12 out of the 13 studied FQs. Using this Mab and norfloxacin conjugated with carrier protein ovalbumin as coating antigen, a time-resolved fluoroimmunoassay (TRFIA) method was developed for determining the total concentration of at least 12 FQs in environmental waters. The respective detection limit (LOD) and IC(50) calculated from the standard curve were 0.053 μg/L and 1.83 μg/L for enrofloxacin (ENR). The LODs of the other FQs, estimated based on the corresponding cross-reactivity and the LOD of ENR, were in the range of 0.051-0.10 μg/L. The developed TRFIA method showed good tolerance to various interfering substances present in environmental matrix at relevant levels, such as humic acids (0-10 mg/L DOC), water hardness (0-2% Ca(2+) and Mg(2+), w/v), and heavy metals (0-1 mg/L). The spiked recoveries estimated by spiking 0.5, 1, and 2 μg/L of five representative FQs into various water samples including paddy water, tap water, pond water, and river water were in the range of 63-120%. The measured total FQ concentration by TRFIA agreed well with that of liquid chromatography-tandem mass spectrometry and was applied to directly evaluate the occurrence and environmental risk of FQs in the surface water of a case area. TRFIA showed high efficiency and great potential in environmental risk assessment as it measures directly the total concentration of a class of pollutants.
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Affiliation(s)
- Zhen Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing 100085, China
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67
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Ma Y, Liu S, Yang H, Wu Y, Sun H, Wang J, Zhao Q, Li F, Huang W. A water-soluble phosphorescent polymer for time-resolved assay and bioimaging of cysteine/homocysteine. J Mater Chem B 2013; 1:319-329. [DOI: 10.1039/c2tb00259k] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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68
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Nchimi-Nono K, Wegner KD, Lindén S, Lecointre A, Ehret-Sabatier L, Shakir S, Hildebrandt N, Charbonnière LJ. Activated phosphonated trifunctional chelates for highly sensitive lanthanide-based FRET immunoassays applied to total prostate specific antigen detection. Org Biomol Chem 2013; 11:6493-501. [DOI: 10.1039/c3ob40898a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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69
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Xu L, Jing Y, Feng L, Xian Z, Yan Y, Liu Z, Huang J. The advantage of reversible coordination polymers in producing visible light sensitized Eu(iii) emissions over EDTA via excluding water from the coordination sphere. Phys Chem Chem Phys 2013; 15:16641-7. [DOI: 10.1039/c3cp52776j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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70
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Development of a ratiometric time-resolved luminescence sensor for pH based on lanthanide complexes. Anal Chim Acta 2013; 761:149-56. [DOI: 10.1016/j.aca.2012.11.025] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 10/19/2012] [Accepted: 11/16/2012] [Indexed: 01/22/2023]
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71
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Shen L, Yang Z, Tang R. Synthesis, luminescence properties of Eu(III) and Tb(III) complexes with a novel aromatic carboxylic acid and their interactions with bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 98:170-177. [PMID: 23000929 DOI: 10.1016/j.saa.2012.08.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 08/11/2012] [Accepted: 08/20/2012] [Indexed: 06/01/2023]
Abstract
A novel aromatic carboxylic acid ligand (L) was synthesized and its corresponding Eu(III) and Tb(III) complexes, Na(3)EuLCl(3)·2H(2)O (EuL) and Na(3)TbLCl(3)·3H(2)O (TbL), were successfully prepared. L and its corresponding complexes were characterized by means of MS, elemental analysis, IR, (1)H NMR and TG. The luminescence spectra of Eu(III) and Tb(III) complexes were investigated and the results showed that L was an efficient sensitizer for Eu(III) and Tb(III) luminescence. The interactions of L, EuL and TbL with bovine serum albumin (BSA) have been investigated through fluorescence spectroscopy under physiological conditions. The Stern-Volmer analysis indicated that the fluorescence quenching of BSA by L, EuL and TbL was resulted from static mechanism, and the binding constants (K(a)) were 2.22×10(4), 1.33×10(5) and 4.27×10(5) at 300 K, respectively. The binding sites (n) and the corresponding thermodynamic parameters ΔH, ΔS, and ΔG were calculated at different temperatures. According to the theoretical and experimental results, van der Waals interactions and hydrogen bonds were found to play major roles in the binding reaction. Furthermore, UV-Vis absorption spectroscopy and synchronous fluorescence spectra indicated that the conformation of BSA was changed. The results obtained in the work can help understand the action mode between L and its corresponding Eu(III) and Tb(III) complexes with BSA, and they are also expected to provide important information of designs of new inspired drugs based on Eu and Tb.
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Affiliation(s)
- Liqun Shen
- College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530006, PR China
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72
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Castillo-García ML, Aguilar-Caballos MP, Gómez-Hens A. Application of Tb(4)O(7) nanoparticles for lasalocid and salicylate determination in food analysis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:11741-11747. [PMID: 23140477 DOI: 10.1021/jf303919q] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The usefulness of Tb(4)O(7) nanoparticles (NPs) as analytical reagents using sensitized luminescence as a detection system is described for the first time, and the results obtained are compared with those obtained using Tb(III) ions. Two drugs used in veterinary practice, namely, lasalocid (LAS) and salicylate (SAL), have been chosen as model analytes to carry out this study. The experimental conditions for these systems have been optimized, and their analytical features were obtained. The detection limits obtained for LAS and SAL using Tb(4)O(7) NPs were 1.0 and 4.0 ng mL(-1), respectively, which were comparable to those obtained using Tb(III) ions: 1.8 and 1.0 ng mL(-1), respectively. However, precision data, with relative standard deviation values in the range 2.3-3.8% using the NPs and 3.5-6.5% using Tb(III) ions, were slightly better for LAS with Tb(4)O(7) NPs. The practical analytical usefulness of Tb(4)O(7) NPs as luminescent reagents has been shown by performing the determination of LAS in tap water, feed premix, and egg samples, obtaining recoveries in the range of 80.0-105.0%.
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Affiliation(s)
- María Luisa Castillo-García
- Department of Analytical Chemistry, Research Institute of Fine Chemistry and Nanochemistry, Campus of Rabanales, Marie Curie Building (Annex), University of Cordoba, 14071-Cordoba, Spain
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73
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Lu J, Martin J, Lu Y, Zhao J, Yuan J, Ostrowski M, Paulsen I, Piper JA, Jin D. Resolving low-expression cell surface antigens by time-gated orthogonal scanning automated microscopy. Anal Chem 2012; 84:9674-8. [PMID: 23098251 DOI: 10.1021/ac302550u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We report a highly sensitive method for rapid identification and quantification of rare-event cells carrying low-abundance surface biomarkers. The method applies lanthanide bioprobes and time-gated detection to effectively eliminate both nontarget organisms and background noise and utilizes the europium containing nanoparticles to further amplify the signal strength by a factor of ∼20. Of interest is that these nanoparticles did not correspondingly enhance the intensity of nonspecific binding. Thus, the dramatically improved signal-to-background ratio enables the low-expression surface antigens on single cells to be quantified. Furthermore, we applied an orthogonal scanning automated microscopy (OSAM) technique to rapidly process a large population of target-only cells on microscopy slides, leading to quantitative statistical data with high certainty. Thus, the techniques together resolved nearly all false-negative events from the interfering crowd including many false-positive events.
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74
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75
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Deslandes S, Galaup C, Poole R, Mestre-Voegtlé B, Soldevila S, Leygue N, Bazin H, Lamarque L, Picard C. Synthesis and optical properties of macrocyclic lanthanide(III) chelates as new reagents for luminescent biolabeling. Org Biomol Chem 2012; 10:8509-23. [PMID: 23011114 DOI: 10.1039/c2ob26311d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The convenient and efficient synthesis of two macrocyclic ligands (15- and 18-membered) based on a dipyrido-6,7,8,9-tetrahydrophenazine (dpqc) or 2,2':6',2''-terpyridine (tpy) heterocycle and a DTTA (diethylenetriaminetriacetic acid) skeleton is described. In these ligands the DTTA skeleton contains an additional extracyclic functionality (NH(2) group) suitable for covalent attachment to bioactive molecules. These octa- and nonadentate ligands form very stable and luminescent neutral lanthanide complexes in aqueous solutions at physiological pH. The corresponding Eu(III) and Tb(III) complexes are characterized by a maximum absorption wavelength compatible with nitrogen laser excitation (337 nm) and attractive lifetimes and quantum yields. Further introduction of a maleimide bioconjugatable handle in the Eu(III) complexes was investigated and a valuable luminescence brightness above 1500 dm(3) mol(-1) cm(-1) at 337 nm was obtained with the corresponding Eu(III) tpy-derivative. Finally, these two luminescent chelates were grafted onto thiol residues of a model antibody (Mab GSS11) without loss of their luminescent properties.
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76
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Charge transfer excited states sensitization of lanthanide emitting from the visible to the near-infra-red. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.03.023] [Citation(s) in RCA: 219] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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77
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Preparation of phosphorylated bis-pyrazolyl–pyridine nonadendate ligands and their terbium complexes. Part 2. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.04.106] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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78
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Zhang L, Wang Y, Ye Z, Jin D, Yuan J. New Class of Tetradentate β-Diketonate-Europium Complexes That Can Be Covalently Bound to Proteins for Time-Gated Fluorometric Application. Bioconjug Chem 2012; 23:1244-51. [DOI: 10.1021/bc300075t] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Lin Zhang
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yanjiao Wang
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Zhiqiang Ye
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Dayong Jin
- MQ Photonics Centre, Faculty
of Science, Macquarie University, NSW 2109,
Sydney, Australia
| | - Jingli Yuan
- State Key Laboratory of Fine
Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
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79
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Synthesis and time-gated fluorometric application of a europium(III) complex with a borono-substituted terpyridine polyacid ligand. Talanta 2012; 91:116-21. [DOI: 10.1016/j.talanta.2012.01.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 01/12/2012] [Accepted: 01/12/2012] [Indexed: 11/17/2022]
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80
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Time-gated luminescence assay using nonmetal probes for determination of protein kinase activity-based disease markers. Anal Biochem 2012; 422:79-88. [DOI: 10.1016/j.ab.2011.12.048] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 12/15/2011] [Accepted: 12/29/2011] [Indexed: 02/01/2023]
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81
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Ji X, Hong J, Guo X. Ultrasensitive detection of phenolic compounds based on a spin-labeled luminescent lanthanide complex. Analyst 2012; 137:710-5. [DOI: 10.1039/c1an15647k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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82
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Terai T, Kikuchi K, Urano Y, Kojima H, Nagano T. A long-lived luminescent probe to sensitively detect arylamine N-acetyltransferase (NAT) activity of cells. Chem Commun (Camb) 2012; 48:2234-6. [DOI: 10.1039/c2cc17622j] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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83
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Zhang H, Tian L, Zhang R, Ye Z, Yuan J. Preparation of visible-light-excited luminescence enhancement solutions for time-resolved luminescence detection of europium biolabel. Analyst 2012; 137:4502-8. [DOI: 10.1039/c2an35719d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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84
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Wang Q, Tang K, Jin X, Huang X, Liu W, Yao X, Tang Y. Lanthanide complexes assembled from two flexible amide-type tripodal ligands: terminal groups effect on photoluminescence behavior. Dalton Trans 2012; 41:3431-8. [DOI: 10.1039/c2dt11761d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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85
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Sun C, Ping H, Zhang M, Li H, Guan F. Spectroscopic studies on the lanthanide sensitized luminescence and chemiluminescence properties of fluoroquinolone with different structure. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 82:375-382. [PMID: 21821467 DOI: 10.1016/j.saa.2011.07.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 07/15/2011] [Accepted: 07/18/2011] [Indexed: 05/31/2023]
Abstract
Lanthanide sensitized luminescence and chemiluminescence (CL) are of great importance because of the unique spectral properties, such as long lifetime, large Stokes shifts, and narrow emission bands characteristic to lanthanide ions (Ln(3+)). With the fluoroquinolone (FQ) compounds including enoxacin (ENX), norfloxacin (NFLX), lomefloxacin (LMFX), fleroxacin (FLRX), ofloxacin (OFLX), rufloxacin (RFX), gatifloxacin (GFLX) and sparfloxacin (SPFX), the luminescence and CL properties of Tb(3+)-FQ and Eu(3+)-FQ complexes have been investigated in this contribution. Ce(4+)-SO(3)(2-) in acidic conditions was taken as the CL system and sensitized CL intensities of Tb(3+)-FQ and Eu(3+)-FQ complexes were determined by flow-injection analysis. The luminescence and CL spectra of Tb(3+)-FQ complexes show characteristic peaks of Tb(3+) at 490 nm, 545 nm, 585 nm and 620 nm. Complexes of Tb(3+)-ENX, Tb(3+)-NFLX, Tb(3+)-LMFX and Tb(3+)-FLRX display relatively strong emission intensity compared with Tb(3+)-OFLX, Tb(3+)-RFX, Tb(3+)-GFLX and Tb(3+)-SPFX. Quite weak peaks with unique characters of Eu(3+) at 590 nm and 617 nm appear in the luminescence and CL spectra of Eu(3+)-ENX, but no notable sensitized luminescence and CL of Eu(3+) could be observed when Eu(3+) is added into other FQ. The distinct differences on emission intensity of Tb(3+)-FQ and Eu(3+)-FQ might originate from the different energy gap between the triplet levels of FQ and the excited levels of the Ln(3+). The different sensitized luminescence and CL signals among Tb(3+)-FQ complexes could be attributed to different optical properties and substituents of these FQ compounds. The detailed mechanism involved in the luminescence and CL properties of Tb(3+)-FQ and Eu(3+)-FQ complexes has been investigated by analyzing the luminescence and CL spectra, quantum yields, and theoretical calculation results.
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Affiliation(s)
- Chunyan Sun
- Department of Food Quality and Safety, College of Quartermaster Technology, Jilin University, Changchun 130062, PR China.
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86
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Victory Devi C, Rajmuhon Singh N. Comparative absorption spectroscopy involving 4f-4f transitions to explore the kinetics of simultaneous coordination of uracil with Nd(III) and Zn(II) and its associated thermodynamics. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 81:296-303. [PMID: 21752705 DOI: 10.1016/j.saa.2011.06.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 06/02/2011] [Accepted: 06/13/2011] [Indexed: 05/31/2023]
Abstract
The interaction of uracil with Nd(III) has been explored in presence and absence of Zn(II) using the comparative absorption spectroscopy involving the 4f-4f transitions in different solvents. The complexation of uracil with Nd(III) is indicated by the change in intensity of 4f-4f bands expressing in terms of significant change in oscillator strength and Judd-Ofelt parameters. Intensification of this bands became more prominent in presence of Zn(II) suggesting the stimulative effect of Zn(II) towards the complexation of Nd(III) with uracil. Other spectral parameters namely Slator-Condon (F(k)'s), nephelauxetic effect (β), bonding (b(1/2)) and percent covalency (δ) parameters are computed to correlate their simultaneous binding of metal ions with uracil. The sensitivities of the observed 4f-4f transitions towards the minor coordination changes around Nd(III) has been used to monitor the simultaneous coordination of uracil with Nd(III) and Zn(II). The variation of intensities (oscillator strengths and Judd-Ofelt parameters) of 4f-4f bands during the complexation has helped in following the heterobimetallic complexation of uracil. Rate of complexation with respect to hypersensitive transition was evaluated. Energy of activation and thermodynamic parameters for the complexation reaction were also determined.
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Affiliation(s)
- Ch Victory Devi
- Department of Chemistry, Manipur University, Canchipur-795003, Imphal, India
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87
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Mizukami S, Yamamoto T, Yoshimura A, Watanabe S, Kikuchi K. Covalent protein labeling with a lanthanide complex and its application to photoluminescence lifetime-based multicolor bioimaging. Angew Chem Int Ed Engl 2011; 50:8750-2. [PMID: 21793145 DOI: 10.1002/anie.201103775] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Indexed: 11/07/2022]
Affiliation(s)
- Shin Mizukami
- Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
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88
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Mizukami S, Yamamoto T, Yoshimura A, Watanabe S, Kikuchi K. Covalent Protein Labeling with a Lanthanide Complex and Its Application to Photoluminescence Lifetime-Based Multicolor Bioimaging. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103775] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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89
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Ye Z, Chen J, Wang G, Yuan J. Development of a terbium complex-based luminescent probe for imaging endogenous hydrogen peroxide generation in plant tissues. Anal Chem 2011; 83:4163-9. [PMID: 21548628 DOI: 10.1021/ac200438g] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A highly sensitive Tb(3+) complex-based luminescent probe, N,N,N(1),N(1)-[2,6-(3'-aminomethyl-1'-pyrazolyl)-4-(3'',4''-diaminophenoxy)methylene-pyridine] tetrakis(acetate)-Tb(3+) (BMTA-Tb(3+)), has been designed and synthesized for the recognition and detection of hydrogen peroxide (H(2)O(2)) in aqueous solutions. This probe is almost nonluminescent because the Tb(3+) luminescence is effectively quenched by the electron-rich moiety, diaminophenyl, on the basis of the photoinduced electron transfer (PET) mechanism. In the presence of peroxidase, the probe can react with H(2)O(2) to cause the cleavage of the diaminophenyl ether, which affords a highly luminescent Tb(3+) complex, N,N,N(1),N(1)-[2,6-bis(3'-aminomethyl-1'-pyrazolyl)-4-hydroxymethyl-pyridine] tetrakis(acetate)-Tb(3+) (BHTA-Tb(3+)), accompanied by a 39-fold increase in luminescence quantum yield with the increase of luminescence lifetime from 1.95 to 2.76 ms. The dose-dependent luminescence enhancement of the probe shows a good linearity with a detection limit of 3.7 nM for H(2)O(2), which is approximately 14-fold lower than those of the commonly used fluorescent probes. The probe was used for the time-resolved luminescence imaging detection of the oligosaccharide-induced H(2)O(2) generation in tobacco leaf epidermal tissues. On the basis of the probe, a background-free time-resolved luminescence imaging method for detecting H(2)O(2) in complicated biological systems was successfully established.
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Affiliation(s)
- Zhiqiang Ye
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China.
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90
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Hong J, Zhuang Y, Ji X, Guo X. A long-lived luminescence and EPR bimodal lanthanide-based probe for free radicals. Analyst 2011; 136:2464-70. [PMID: 21556434 DOI: 10.1039/c0an00914h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed a novel spin-labeled terbium complex Tb(3+)/cs124-DTPA-TEMPO (1) by covalently labeling a nitroxide radical on the terbium complex for monitoring free radicals of various areas. This lanthanide complex probe shows a high EPR signal which resulted from the nitroxide radical moiety, and is weakly luminescent which resulted from the intramolecular quenching effect of the nitroxide radical on sensitised terbium luminescence. The intensity of both the EPR and luminescence can be modulated by eliminating the paramagnetism of the nitroxide radical through recognition of a carbon-centered radical analyte and thus gives a quantification of the analyte. We have preliminarily applied this probe in the luminescent detection of model carbon-centered radicals and hydroxyl radicals (·OH). This probe is water-soluble and contains lanthanide-luminescence properties, favorable for the time-resolved luminescence technique. The investigation of the intramolecular quenching process has showed that the labeled nitroxide radical quenches multiple excited states of the terbium complex, resulting in highly efficient quenching of terbium luminescence. This probe is the first example of intramolecular modulation of lanthanide luminescence by a nitroxide radical.
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Affiliation(s)
- Jinqing Hong
- The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, China
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91
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Jin D. Demonstration of true-color high-contrast microorganism imaging for terbium bioprobes. Cytometry A 2011; 79:392-7. [DOI: 10.1002/cyto.a.21052] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 02/14/2011] [Accepted: 02/22/2011] [Indexed: 12/18/2022]
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92
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Devi CV, Singh NR. Absorption spectroscopic probe to investigate the interaction between Nd(III) and calf-thymus DNA. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:1180-1186. [PMID: 21247794 DOI: 10.1016/j.saa.2010.12.078] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Revised: 12/15/2010] [Accepted: 12/25/2010] [Indexed: 05/30/2023]
Abstract
The interaction between Nd(III) and Calf Thymus DNA (CT-DNA) in physiological buffer (pH 7.4) has been studied using absorption spectroscopy involving 4f-4f transition spectra in different aquated organic solvents. Complexation with CT-DNA is indicated by the changes in absorption intensity following the subsequent changes in the oscillator strengths of different 4f-4f bands and Judd-Ofelt intensity (T(λ)) parameters. The other spectral parameters namely Slator-Condon (F(k)'s), nephelauxetic effect (β), bonding (b(1/2)) and percent covalency (δ) parameters are computed to correlate with the binding of Nd(III) with DNA. The absorption spectra of Nd(III) exhibited hyperchromism and red shift in the presence of DNA. The binding constant, K(b) has been determined by absorption measurement. The relative viscosity of DNA decreased with the addition of Nd(III). Thermodynamic parameters have been calculated according to relevant absorption data and Van't Hoff equation. The characterisation of bonding mode has been studied in detail. The results suggested that the major interaction mode between Nd(III) and DNA was external electrostatic binding.
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Affiliation(s)
- Ch Victory Devi
- Department of Chemistry, Manipur University, Canchipur, Imphal, Manipur, India
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93
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Jin D, Piper JA. Time-Gated Luminescence Microscopy Allowing Direct Visual Inspection of Lanthanide-Stained Microorganisms in Background-Free Condition. Anal Chem 2011; 83:2294-300. [DOI: 10.1021/ac103207r] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dayong Jin
- Advanced Cytometry Laboratories at Macquarie, MQ Biofocus Research Centre, Faculty of Science, Macquarie University, NSW 2109 Australia
| | - James A. Piper
- Advanced Cytometry Laboratories at Macquarie, MQ Biofocus Research Centre, Faculty of Science, Macquarie University, NSW 2109 Australia
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94
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Placidi MP, Engelmann J, Natrajan LS, Logothetis NK, Angelovski G. An aryl-phosphonate appended macrocyclic platform for lanthanide based bimodal imaging agents. Chem Commun (Camb) 2011; 47:11534-6. [DOI: 10.1039/c1cc14437e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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95
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Chen Y, Guo W, Ye Z, Wang G, Yuan J. A europium(iii) chelate as an efficient time-gated luminescent probe for nitric oxide. Chem Commun (Camb) 2011; 47:6266-8. [DOI: 10.1039/c0cc05658h] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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96
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Liu X, Ye Z, Wei W, Du Y, Yuan J, Ma D. Artificial luminescent protein as a bioprobe for time-gated luminescence bioimaging. Chem Commun (Camb) 2011; 47:8139-41. [DOI: 10.1039/c1cc11759a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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97
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Recent developments in the detection of singlet oxygen with molecular spectroscopic methods. Trends Analyt Chem 2011. [DOI: 10.1016/j.trac.2010.08.009] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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98
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99
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WEN X. Benzene ring impact on energy transfer system of Eu(TTA)3DPBT. J RARE EARTH 2010. [DOI: 10.1016/s1002-0721(10)60311-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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100
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Dong H, Liu Y, Wang D, Zhang W, Ye Z, Wang G, Yuan J. Preparation of europium-quantum dots and europium-fluorescein composite nanoparticles available for ratiometric luminescent detection of metal ions. NANOTECHNOLOGY 2010; 21:395504. [PMID: 20820091 DOI: 10.1088/0957-4484/21/39/395504] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The silica-encapsulated luminescent lanthanide nanoparticles have been developed for the selective tagging of a wide range of important targets in recent years, however, they are mainly limited to europium and terbium compounds. In this work, two types of europium-containing dual-luminophore silica nanoparticles, silica-encapsulated CdTe quantum dots (CdTe QDs)-BHHCT-Eu(3+) complex nanoparticles and BHHCT-Eu(3+) surface-bound silica-encapsulated fluorescein isothiocyanate (FITC) nanoparticles (BHHCT: 4, 4'-bis(1'', 1'', 1'', 2'', 2'', 3'', 3''-heptafluoro-4'', 6''-hexanedion-6''-yl)chlorosulfo-o-terphenyl), were successfully prepared using a water-in-oil (W/O) reverse microemulsion method. The results of transmission electron microscopy and luminescence spectroscopy characterizations indicate that the two types of nanoparticles are all monodisperse, spherical and uniform in size (approximately 50 nm in diameter), and have well-resolved and stable dual luminescence emission properties. The CdTe QDs-BHHCT-Eu(3+) nanoparticles can be excited at 365 nm to give dual-emission peaks at 535 and 610 nm, and the FITC-BHHCT-Eu(3+) nanoparticles can be excited at 335 nm to give dual-emission peaks at 515 and 610 nm. The luminescence response investigations of the nanoparticles to different metal ions indicate that the new nanoparticles can be used as ratiometric luminescent sensing probes for the selective detection of Cu(2+) and Fe(2+) ions, respectively. The performance of the nanoparticle probe for metal ion detection was investigated.
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Affiliation(s)
- Haitao Dong
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian, People's Republic of China
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