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Yakimov B, Rovnyagina N, Hasan A, Zhang J, Wang H, Fadeev V, Urusova L, Khoroshilov E, Sharkov A, Mokrysheva N, Shirshin E. Fluorescence saturation imaging microscopy: molecular fingerprinting with a standard confocal microscope. BIOMEDICAL OPTICS EXPRESS 2024; 15:3755-3769. [PMID: 38867799 PMCID: PMC11166444 DOI: 10.1364/boe.512188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 02/16/2024] [Accepted: 02/20/2024] [Indexed: 06/14/2024]
Abstract
Molecular specificity in fluorescence imaging of cells and tissues can be increased by measuring parameters other than intensity. For instance, fluorescence lifetime imaging became a widespread modality for biomedical optics. Previously, we suggested using the fluorescence saturation effect at pulsed laser excitation to map the absorption cross-section as an additional molecular contrast in two-photon microscopy [Opt. Lett.47(17), 4455 (2022).10.1364/OL.465605]. Here, it is shown that, somewhat counterintuitive, fluorescence saturation can be observed under cw excitation in a standard confocal microscopy setup. Mapping the fluorescence saturation parameter allows obtaining additional information about the fluorophores in the system, as demonstrated by the example of peptide hydrogel, stained cells and unstained thyroid gland. The suggested technique does not require additional equipment and can be implemented on confocal systems as is.
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Affiliation(s)
- Boris Yakimov
- Laboratory of Clinical Biophotonics, Sechenov First Moscow State Medical University, Trubetskaya 8, Moscow 119048, Russia
- Vorohobov’s City Clinical Hospital №67 MHD Moscow, 2/44 Salam Adil St., Moscow 123423, Russia
| | - Natalia Rovnyagina
- Laboratory of Clinical Biophotonics, Sechenov First Moscow State Medical University, Trubetskaya 8, Moscow 119048, Russia
| | - Afraa Hasan
- HSE University, Faculty of Physics, Myasnitskaya St., 20, Moscow 101100, Russia
| | - Juntao Zhang
- School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei 4300023, China
| | - Haibo Wang
- School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei 4300023, China
| | - Victor Fadeev
- Faculty of Physics, M.V. Lomonosov Moscow State University, 1-2 Leninskie Gory, 119991 Moscow, Russia
| | - Liliya Urusova
- Endocrinology Research Center, Dmitriya Ulianova Street, 11, 117036 Moscow, Russia
| | - Evgeny Khoroshilov
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 53 Leninsky Pr., 119991 Moscow, Russia
| | - Andrey Sharkov
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 53 Leninsky Pr., 119991 Moscow, Russia
| | - Nataliya Mokrysheva
- Endocrinology Research Center, Dmitriya Ulianova Street, 11, 117036 Moscow, Russia
| | - Evgeny Shirshin
- Faculty of Physics, M.V. Lomonosov Moscow State University, 1-2 Leninskie Gory, 119991 Moscow, Russia
- Endocrinology Research Center, Dmitriya Ulianova Street, 11, 117036 Moscow, Russia
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Haubitz T, Tsushima S, Steudtner R, Drobot B, Geipel G, Stumpf T, Kumke MU. Ultrafast Transient Absorption Spectroscopy of UO 22+ and [UO 2Cl] . J Phys Chem A 2018; 122:6970-6977. [PMID: 30095911 DOI: 10.1021/acs.jpca.8b05567] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
For the only water coordinated "free" uranyl(VI) aquo ion in perchlorate solution we identified and assigned several different excited states and showed that the 3Δ state is the luminescent triplet state from transient absorption spectroscopy. With additional data from other spectroscopic methods (TRLFS, UV/vis) we generated a detailed Jabłoński diagram and determined rate constants for several state transitions, like the inner conversion rate constant from the 3Φ state to the 3Δ state transition to be 0.35 ps-1. In contrast to luminescence measurements, it was possible to observe the highly quenched uranyl(VI) ion in highly concentrated chloride solution by TAS and we were able to propose a dynamic quenching mechanism, where chloride complexation is followed by the charge transfer from the excited state uranyl(VI) to chloride. This proposed quenching route is supported by TD-DFT calculations.
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Affiliation(s)
- Toni Haubitz
- Institute of Chemistry , University of Potsdam , Karl-Liebknecht-Straße 24-25 , D-14476 Potsdam , Germany
| | - Satoru Tsushima
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , D-01328 Dresden , Germany.,Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research , Tokyo Institute of Technology , Tokyo 152-8550 , Japan
| | - Robin Steudtner
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , D-01328 Dresden , Germany
| | - Björn Drobot
- Max Planck Institute of Molecular Cell Biology and Genetics , Pfotenhauerstraße 108 , D-01307 Dresden , Germany
| | - Gerhard Geipel
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , D-01328 Dresden , Germany
| | - Thorsten Stumpf
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , D-01328 Dresden , Germany
| | - Michael U Kumke
- Institute of Chemistry , University of Potsdam , Karl-Liebknecht-Straße 24-25 , D-14476 Potsdam , Germany
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Skrodzki PJ, Burger M, Finney LA, Poineau F, Balasekaran SM, Nees J, Czerwinski KR, Jovanovic I. Ultrafast Laser Filament-induced Fluorescence Spectroscopy of Uranyl Fluoride. Sci Rep 2018; 8:11629. [PMID: 30072758 PMCID: PMC6072712 DOI: 10.1038/s41598-018-29814-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 07/16/2018] [Indexed: 11/17/2022] Open
Abstract
Uranyl fluoride (UO2F2) is a compound which forms in the reaction between water and uranium hexafluoride, a uranium containing gas widely used for uranium enrichment. Uranyl fluoride exhibits negligible natural background in atmosphere; as a result, its observation implies the presence and active operation of nearby enrichment facilities and could be used as a tracer for treaty verification technologies. Additionally, detection of UO2F2 has a potential application in guiding remediation efforts around enrichment facilities. Laser-induced fluorescence (LIF) has been proposed in the past as a viable technique for the detection and tracking of UO2F2. We demonstrate that ultrafast laser filamentation coupled with LIF extends the capabilities of standard LIF to enable remote detection of UO2F2. An intense femtosecond laser pulse propagated in air collapses into a plasma channel, referred to as a laser filament, allowing for the extended delivery of laser energy. We first investigate the luminescence of UO2F2 excited by the second harmonic of an ultrafast Ti:sapphire laser and subsequently excite it using the conical emission that accompanies ultrafast laser filamentation in air. We measure the decay rates spanning 4.3-5.6 × 104 s-1 and discuss the characteristics of the luminescence for both ultrafast- and filament-excitation. Larger decay rates than those observed using standard LIF are caused by a saturated component of prompt decay from annihilation of dense excited states upon excitation with an ultrafast source. The reproducibility of such decay rates for the given range of incident laser intensities 1.0-1.6 × 1011 W cm-2 is promising for the application of this technique in remote sensing.
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Affiliation(s)
- P J Skrodzki
- Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI, 48109, United States.
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, MI, 48109, United States.
| | - M Burger
- Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI, 48109, United States
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, MI, 48109, United States
| | - L A Finney
- Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI, 48109, United States
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, MI, 48109, United States
| | - F Poineau
- Department of Chemistry, University of Nevada Las Vegas, Las Vegas, NV, 89154, United States
| | - S M Balasekaran
- Department of Chemistry, University of Nevada Las Vegas, Las Vegas, NV, 89154, United States
| | - J Nees
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, MI, 48109, United States
| | - K R Czerwinski
- Department of Chemistry, University of Nevada Las Vegas, Las Vegas, NV, 89154, United States
| | - I Jovanovic
- Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI, 48109, United States
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, MI, 48109, United States
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Višňak J, Sobek L. Quantum chemical calculations and spectroscopic measurements of spectroscopic and thermodynamic properties of given uranyl complexes in aqueous solutions with possible environmental and industrial applications. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201612802002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Drobot B, Steudtner R, Raff J, Geipel G, Brendler V, Tsushima S. Combining luminescence spectroscopy, parallel factor analysis and quantum chemistry to reveal metal speciation - a case study of uranyl(vi) hydrolysis. Chem Sci 2015; 6:964-972. [PMID: 29560182 PMCID: PMC5811152 DOI: 10.1039/c4sc02022g] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 10/24/2014] [Indexed: 12/17/2022] Open
Abstract
This study of aqueous metal speciation is an advanced combination of theoretical and experimental methods. Continuous wave (CW) and time-resolved laser-induced fluorescence spectroscopy (TRLFS) data of uranyl(vi) hydrolysis were analyzed using parallel factor analysis (PARAFAC). Distribution patterns of five major species were thereby derived under a fixed uranyl concentration (10-5 M) over a wide pH range from 2 to 11. UV (180 nm to 370 nm) excitation spectra were extracted for individual species. Time-dependent density functional theory (TD-DFT) calculations revealed ligand excitation (water, hydroxo, oxo) in this region and ligand-to-metal charge transfer (LMCT) responsible for luminescence. Thus excitation in the UV region is extreme ligand sensitive and specific. Combining findings from PARAFAC and DFT the [UO2(H2O)5]2+ cation (aquo complex 1 : 0) and four hydroxo complexes (1 : 1, 3 : 5, 3 : 7 and 1 : 3) were identified. The methodological concept used here is applicable to luminescent metals in general and thus enables acquisition of refined structural and thermodynamical data of lanthanide and actinide complexation.
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Affiliation(s)
- Björn Drobot
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
| | - Robin Steudtner
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
| | - Johannes Raff
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
- Helmholtz Zentrum Dresden Rossendorf , Helmholtz Institute Freiberg for Resource Technology , Halsbrücker Straße 34 , 09599 Freiberg , Germany
| | - Gerhard Geipel
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
| | - Vinzenz Brendler
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
| | - Satoru Tsushima
- Helmholtz Zentrum Dresden Rossendorf , Institute of Resource Ecology , Bautzner Landstraße 400 , 01328 Dresden , Germany . ;
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