1
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Fiedler S, Frenzel F, Würth C, Tavernaro I, Grüne M, Schweizer S, Engel A, Resch-Genger U. Interlaboratory Comparison on Absolute Photoluminescence Quantum Yield Measurements of Solid Light Converting Phosphors with Three Commercial Integrating Sphere Setups. Anal Chem 2024; 96:6730-6737. [PMID: 38629445 PMCID: PMC11063975 DOI: 10.1021/acs.analchem.4c00372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 04/04/2024] [Accepted: 04/07/2024] [Indexed: 05/01/2024]
Abstract
Scattering luminescent materials dispersed in liquid and solid matrices and luminescent powders are increasingly relevant for fundamental research and industry. Examples are luminescent nano- and microparticles and phosphors of different compositions in various matrices or incorporated into ceramics with applications in energy conversion, solid-state lighting, medical diagnostics, and security barcoding. The key parameter to characterize the performance of these materials is the photoluminescence/fluorescence quantum yield (Φf), i.e., the number of emitted photons per number of absorbed photons. To identify and quantify the sources of uncertainty of absolute measurements of Φf of scattering samples, the first interlaboratory comparison (ILC) of three laboratories from academia and industry was performed by following identical measurement protocols. Thereby, two types of commercial stand-alone integrating sphere setups with different illumination and detection geometries were utilized for measuring the Φf of transparent and scattering dye solutions and solid phosphors, namely, YAG:Ce optoceramics of varying surface roughness, used as converter materials for blue light emitting diodes. Special emphasis was dedicated to the influence of the measurement geometry, the optical properties of the blank utilized to determine the number of photons of the incident excitation light absorbed by the sample, and the sample-specific surface roughness. While the Φf values of the liquid samples matched between instruments, Φf measurements of the optoceramics with different blanks revealed substantial differences. The ILC results underline the importance of the measurement geometry, sample position, and blank for reliable Φf data of scattering the YAG:Ce optoceramics, with the blank's optical properties accounting for uncertainties exceeding 20%.
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Affiliation(s)
- Saskia Fiedler
- Division
of Biophotonics, Federal Institute for Materials Research and Testing
(BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Florian Frenzel
- Division
of Biophotonics, Federal Institute for Materials Research and Testing
(BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Christian Würth
- Division
of Biophotonics, Federal Institute for Materials Research and Testing
(BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Isabella Tavernaro
- Division
of Biophotonics, Federal Institute for Materials Research and Testing
(BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Michelle Grüne
- Faculty
of Electrical Engineering, South Westphalia
University of Applied Sciences, Lübecker Ring 2, 59494 Soest, Germany
| | - Stefan Schweizer
- Faculty
of Electrical Engineering, South Westphalia
University of Applied Sciences, Lübecker Ring 2, 59494 Soest, Germany
- Fraunhofer
Application Center for Inorganic Phosphors, Branch Lab of Fraunhofer Institute for Microstructure of Materials
and Systems IMWS, Lübecker
Ring 2, 59494 Soest, Germany
| | - Axel Engel
- Schott
AG Technical Services, Hattenbergstrasse 10, D-55122 Mainz, Germany
| | - Ute Resch-Genger
- Division
of Biophotonics, Federal Institute for Materials Research and Testing
(BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
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2
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Lahlou A, Tehrani HS, Coghill I, Shpinov Y, Mandal M, Plamont MA, Aujard I, Niu Y, Nedbal L, Lazár D, Mahou P, Supatto W, Beaurepaire E, Eisenmann I, Desprat N, Croquette V, Jeanneret R, Le Saux T, Jullien L. Fluorescence to measure light intensity. Nat Methods 2023; 20:1930-1938. [PMID: 37996751 PMCID: PMC10703675 DOI: 10.1038/s41592-023-02063-y] [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: 03/06/2023] [Accepted: 10/02/2023] [Indexed: 11/25/2023]
Abstract
Despite the need for quantitative measurements of light intensity across many scientific disciplines, existing technologies for measuring light dose at the sample of a fluorescence microscope cannot simultaneously retrieve light intensity along with spatial distribution over a wide range of wavelengths and intensities. To address this limitation, we developed two rapid and straightforward protocols that use organic dyes and fluorescent proteins as actinometers. The first protocol relies on molecular systems whose fluorescence intensity decays and/or rises in a monoexponential fashion when constant light is applied. The second protocol relies on a broad-absorbing photochemically inert fluorophore to back-calculate the light intensity from one wavelength to another. As a demonstration of their use, the protocols are applied to quantitatively characterize the spatial distribution of light of various fluorescence imaging systems, and to calibrate illumination of commercially available instruments and light sources.
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Affiliation(s)
- Aliénor Lahlou
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France.
- Sony Computer Science Laboratories, Paris, France.
| | - Hessam Sepasi Tehrani
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France
| | - Ian Coghill
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France
| | - Yuriy Shpinov
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France
| | - Mrinal Mandal
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France
| | - Marie-Aude Plamont
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France
| | - Isabelle Aujard
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France
| | - Yuxi Niu
- Institute of Bio- and Geosciences/Plant Sciences, Forschungszentrum Jülich, Jülich, Germany
| | - Ladislav Nedbal
- Institute of Bio- and Geosciences/Plant Sciences, Forschungszentrum Jülich, Jülich, Germany
- Department of Biophysics, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | - Dusan Lazár
- Department of Biophysics, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | - Pierre Mahou
- Laboratory for Optics and Biosciences, Ecole Polytechnique, CNRS, INSERM, IP Paris, Palaiseau, France
| | - Willy Supatto
- Laboratory for Optics and Biosciences, Ecole Polytechnique, CNRS, INSERM, IP Paris, Palaiseau, France
| | - Emmanuel Beaurepaire
- Laboratory for Optics and Biosciences, Ecole Polytechnique, CNRS, INSERM, IP Paris, Palaiseau, France
| | - Isabelle Eisenmann
- Laboratory of Physics of the École Normale Supérieure, University of PSL, CNRS, Sorbonne University, University of Paris City, Paris, France
- Institute of Biology of ENS (IBENS), École Normale Supérieure, CNRS, INSERM, University of PSL, Paris, France
| | - Nicolas Desprat
- Laboratory of Physics of the École Normale Supérieure, University of PSL, CNRS, Sorbonne University, University of Paris City, Paris, France
- Institute of Biology of ENS (IBENS), École Normale Supérieure, CNRS, INSERM, University of PSL, Paris, France
| | - Vincent Croquette
- Laboratory of Physics of the École Normale Supérieure, University of PSL, CNRS, Sorbonne University, University of Paris City, Paris, France
- Institute of Biology of ENS (IBENS), École Normale Supérieure, CNRS, INSERM, University of PSL, Paris, France
| | - Raphaël Jeanneret
- Laboratory of Physics of the École Normale Supérieure, University of PSL, CNRS, Sorbonne University, University of Paris City, Paris, France
- Institute of Biology of ENS (IBENS), École Normale Supérieure, CNRS, INSERM, University of PSL, Paris, France
| | - Thomas Le Saux
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France.
| | - Ludovic Jullien
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne University, CNRS, Paris, France.
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3
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Würth C, Behnke T, Gienger J, Resch-Genger U. Efficiency scale for scattering luminescent particles linked to fundamental and measurable spectroscopic properties. Sci Rep 2023; 13:6254. [PMID: 37069220 PMCID: PMC10110600 DOI: 10.1038/s41598-023-32933-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 04/04/2023] [Indexed: 04/19/2023] Open
Abstract
Comparing the performance of molecular and nanoscale luminophores and luminescent micro- and nanoparticles and estimating achievable signal amplitudes and limits of detection requires a standardizable intensity scale. This initiated the development of the relative MESF (number of molecules of equivalent soluble fluorochromes) and ERF (equivalent reference fluorophores) scales for flow cytometry and fluorescence microscopy. Both intensity scales rely on fluorescence intensity values assigned to fluorescent calibration beads by an intensity comparison to spectrally closely matching fluorophore solutions of known concentration using a spectrofluorometer. Alternatively, the luminophore or bead brightness (B) can be determined that equals the product of the absorption cross section (σa) at the excitation wavelength (σa(λex)) and the photoluminescence quantum yield (Φpl). Thereby, an absolute scale based on fundamental and measurable spectroscopic properties can be realized which is independent of particle size, material, and luminophore staining or labeling density and considers the sensitivity of the optical properties of luminophores to their environment. Aiming for establishing such a brightness scale for light-scattering dispersions of luminescent particles with sizes exceeding a few ten nanometers, we demonstrate how the brightness of quasi-monodisperse 25 nm, 100 nm, and 1 µm sized polystyrene particles (PSP), loaded with two different dyes in varying concentrations, can be obtained with a single custom-designed integrating sphere setup that enables the absolute determination of Φpl and transmittance and diffuse reflectance measurements. The resulting Φpl, σa(λex), imaginary parts of the refractive index, and calculated B values of these samples are given in dependence of the number of incorporated dye molecule per particle. Finally, a unitless luminescence efficiency (LE) is defined allowing for the direct comparison of luminescence efficiencies of particles with different sizes.
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Affiliation(s)
- Christian Würth
- Division Biophotonics, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstaetter Str. 11, 12489, Berlin, Germany.
| | - Thomas Behnke
- Division Biophotonics, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstaetter Str. 11, 12489, Berlin, Germany
| | - Jonas Gienger
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587, Berlin, Germany
| | - Ute Resch-Genger
- Division Biophotonics, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstaetter Str. 11, 12489, Berlin, Germany.
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4
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Pauli J, Güttler A, Schneider T, Würth C, Resch-Genger U. Fluorescence Quantum Yield Standards for the UV/Visible/NIR: Development, Traceable Characterization, and Certification. Anal Chem 2023; 95:5671-5677. [PMID: 36920895 DOI: 10.1021/acs.analchem.2c05530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
The rational design of next generation molecular and nanoscale reporters and the comparison of different emitter classes require the determination of the fluorometric key performance parameter fluorescence quantum yield (Φf), i.e., the number of emitted photons per number of absorbed photons. Main prerequisites for reliable Φf measurements, which are for transparent luminophore solutions commonly done relative to a reference, i.e., a fluorescence quantum yield standard of known Φf, are reliable and validated instrument calibration procedures to consider wavelength-, polarization-, and time-dependent instrument specific signal contributions, and sufficiently well characterized fluorescence quantum yield standards. As the standard's Φf value directly contributes to the calculation of the sample's Φf, its accuracy presents one of the main sources of uncertainty of relative Φf measurements. To close this gap, we developed a first set of 12 fluorescence quantum yield standards, which absorb and emit in the wavelength region of 330-1000 nm and absolutely determined their Φf values with two independently calibrated integrating sphere setups. Criteria for standard selection and the configuration of these novel fluorescence reference materials are given, and the certification procedure is presented including homogeneity and stability studies and the calculation of complete uncertainty budgets for the certified Φf values. The ultimate goal is to provide the community of fluorescence users with available reference materials as a basis for an improved comparability and reliability of quantum yield data since the measurement of this spectroscopic key property is an essential part of the characterization of any new emitter.
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Affiliation(s)
- Jutta Pauli
- Division Biophotonics, Federal Institute for Materials Research and Testing (BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Arne Güttler
- Division Biophotonics, Federal Institute for Materials Research and Testing (BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Thomas Schneider
- Division Biophotonics, Federal Institute for Materials Research and Testing (BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Christian Würth
- Division Biophotonics, Federal Institute for Materials Research and Testing (BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Ute Resch-Genger
- Division Biophotonics, Federal Institute for Materials Research and Testing (BAM), Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
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5
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Braslavsky SE. Photochemistry in IUPAC: the Committee (1976–2001) and the Sub-Committee (2001–). PURE APPL CHEM 2023. [DOI: 10.1515/pac-2022-1207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
Abstract
The history of the IUPAC Photochemistry Committee since its creation in 1976 and its transition in 2001 to the IUPAC Photochemistry Sub-Committee are reviewed as well as the connections of Committee and Sub-Committee to the various photochemical associations (European Photochemical Association, EPA, Inter-American Photochemical Society, I-APS and Asian and Oceanian Photochemistry Association, APA). The participants in both the Commission and the Sub-Committee over the years are listed as well as the Recommendations and Technical Reports produced since the creation of the Committee until the present days.
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Affiliation(s)
- Silvia E. Braslavsky
- Max Planck Institute for Chemical Energy Conversion (retired) , Muelheim an der Ruhr , Germany
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6
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Mehdizadeh Naderi P, Zargoosh K, Qandalee M, Firuzi O, Behmadi H, Hossienkhani S, Moasses Ghafary S, Durán-Valle CJ. Synthesis and application of the fluorescent furan and imidazole probes for selective in vivo and in vitro cancer cell imaging. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 279:121455. [PMID: 35679740 DOI: 10.1016/j.saa.2022.121455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/25/2022] [Accepted: 05/29/2022] [Indexed: 06/15/2023]
Abstract
Development of imaging probes for identification of tumors in the early stages of growth can significantly reduce the tumor-related health hazards and improve our capacity for treatment of cancer. In this work, three different furan and imidazole fluorescent derivatives abbreviated as Cyclo X, SAC and SNO are introduced for in vivo and in vitro imaging of cancer cells. The fluorescence quantum yield values were 0.226, 0.400 and 0.479 for Cyclo X, SAC and SNO, respectively. The excitation and emission wavelengths of maximum intensity were (360, 452), (350, 428) and (350, 432) nm for Cyclo X, SAC and SNO, respectively. The MTT reduction assay was used to estimate the cytotoxic activity of the proposed derivatives against HT-29 (cancer) and Vero (normal) cell lines. Cyclo X showed no cytotoxic effect, while SAC and SNO showed significantly higher cytotoxicity against the tested cell lines than cisplatin as a well-known anticancer drug. In vitro fluorescence microscopic images obtained using HT-29 cells showed that Cyclo X produced very bright images. The in vivo cancer cell imaging using 4T1 tumor-bearing mice revealed that Cyclo X is selectively accumulated in the tumor without distribution in the mice body organs. The spectral and structural stability, large Stokes shift, non-cytotoxicity and high level of selectivity for in vivo imaging are properties that make Cyclo X a suitable candidate to be used for long-term monitoring of cancer cells.
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Affiliation(s)
- Parisa Mehdizadeh Naderi
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran
| | - Kiomars Zargoosh
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran.
| | - Mohammad Qandalee
- Department of Basic Sciences, Garmsar Branch, Islamic Azad University, Garmsar, Iran
| | - Omidreza Firuzi
- Medicinal and Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hossein Behmadi
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Saman Hossienkhani
- Department of Biochemistry, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran
| | - Sorous Moasses Ghafary
- Department of Nanobiotechnology, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran
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7
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Recknagel S, Bresch H, Kipphardt H, Koch M, Rosner M, Resch-Genger U. Trends in selected fields of reference material production. Anal Bioanal Chem 2022; 414:4281-4289. [PMID: 35316348 PMCID: PMC9142448 DOI: 10.1007/s00216-022-03996-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/18/2022] [Accepted: 02/28/2022] [Indexed: 12/02/2022]
Abstract
For more than 110 years, BAM has been producing reference materials for a wide range of application fields. With the development of new analytical methods and new applications as well as continuously emerging more stringent requirements of laboratory accreditation with regard to quality control and metrological traceability, the demand and requirements for reference materials are increasing. This trend article gives an overview of general developments in the field of reference materials as well as developments in selected fields of application in which BAM is active. This includes inorganic and metal analysis, gas analysis, food and consumer products, and geological samples. In addition to these more traditional fields of application, developments in the areas of optical spectroscopy, particularly fluorescence methods, and nanomaterials are considered.
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Affiliation(s)
- Sebastian Recknagel
- Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany.
| | - Harald Bresch
- Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany
| | - Heinrich Kipphardt
- Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany
| | - Matthias Koch
- Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany
| | - Martin Rosner
- IsoAnalysis UG, Volmerstr. 7a, 12489, Berlin, Germany
| | - Ute Resch-Genger
- Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany
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8
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Kalra AP, Eakins BB, Vagin SI, Wang H, Patel SD, Winter P, Aminpour M, Lewis JD, Rezania V, Shankar K, Scholes GD, Tuszynski JA, Rieger B, Meldrum A. A Nanometric Probe of the Local Proton Concentration in Microtubule-Based Biophysical Systems. NANO LETTERS 2022; 22:517-523. [PMID: 34962401 DOI: 10.1021/acs.nanolett.1c04487] [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
We show a double-functional fluorescence sensing paradigm that can retrieve nanometric pH information on biological structures. We use this method to measure the extent of protonic condensation around microtubules, which are protein polymers that play many roles crucial to cell function. While microtubules are believed to have a profound impact on the local cytoplasmic pH, this has been hard to show experimentally due to the limitations of conventional sensing techniques. We show that subtle changes in the local electrochemical surroundings cause a double-functional sensor to transform its spectrum, thus allowing a direct measurement of the protonic concentration at the microtubule surface. Microtubules concentrate protons by as much as one unit on the pH scale, indicating a charge storage role within the cell via the localized ionic condensation. These results confirm the bioelectrical significance of microtubules and reveal a sensing concept that can deliver localized biochemical information on intracellular structures.
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Affiliation(s)
- Aarat P Kalra
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States of America
| | - Boden B Eakins
- Department of Electrical and Computer Engineering, University of Alberta, 9107-116 St, Edmonton, Alberta T6G 2 V4, Canada
| | - Sergei I Vagin
- Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85747 Garching bei München, Germany
| | - Hui Wang
- Department of Physics, University of Alberta, 11335 Saskatchewan Dr NW, Edmonton, Alberta T6G 2E1, Canada
| | - Sahil D Patel
- Electrical and Computer Engineering Department, University of California, Santa Barbara, California 93106, United States of America
| | - Philip Winter
- Department of Oncology, University of Alberta, Edmonton, Alberta T6G 1Z2, Canada
| | - Maral Aminpour
- Department of Electrical and Computer Engineering, University of Alberta, 9107-116 St, Edmonton, Alberta T6G 2 V4, Canada
- Department of Oncology, University of Alberta, Edmonton, Alberta T6G 1Z2, Canada
| | - John D Lewis
- Department of Oncology, University of Alberta, Edmonton, Alberta T6G 1Z2, Canada
| | - Vahid Rezania
- Department of Physical Sciences, MacEwan University, Edmonton, Alberta T5J 4S2, Canada
| | - Karthik Shankar
- Department of Electrical and Computer Engineering, University of Alberta, 9107-116 St, Edmonton, Alberta T6G 2 V4, Canada
| | - Gregory D Scholes
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States of America
| | - Jack A Tuszynski
- Department of Physics, University of Alberta, 11335 Saskatchewan Dr NW, Edmonton, Alberta T6G 2E1, Canada
- Department of Oncology, University of Alberta, Edmonton, Alberta T6G 1Z2, Canada
- Department of Mechanical and Aerospace Engineering (DIMEAS), Politecnico di Torino, Torino 10129, Italy
| | - Bernhard Rieger
- Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85747 Garching bei München, Germany
| | - Alkiviathes Meldrum
- Department of Physics, University of Alberta, 11335 Saskatchewan Dr NW, Edmonton, Alberta T6G 2E1, Canada
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9
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de Mello RB, da Silva Emery F. Impact of the Arylation of Fused N-bridged BODIPY Dyes in Photophysical Properties. J Fluoresc 2021; 32:81-86. [PMID: 34731385 DOI: 10.1007/s10895-021-02831-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 09/27/2021] [Indexed: 11/29/2022]
Abstract
Functionalization of BODIPY dyes is commonly used to modulate photophysical properties. Among the chemical modification of these dyes, ring fusion indifferent faces of dipyrromethene cores is gaining attention in the literature, due to the modulation of emission/absorption properties and fluorophores with increased bright. N-bridged arylated BODIPYs were recently synthesized and shows intense bright and blu shifted emission. However, few examples of substituted compounds are described and none involving arylation with extention of the π-conjugation. In this manuscript, it is shown an optimized method for the synthesis of N-bridged arylated BODIPYs, including arylated derivatives, and the studies of molecular properties. It is also shown that fluorinated aryl substituted N-bridged arylated BODIPYs show high quantum yields and are red-shifted compared to unsubstituted examples. The work open opportunities for application of the new developed compounds as probes.
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Affiliation(s)
- Rodrigo Brito de Mello
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil.
| | - Flavio da Silva Emery
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil
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10
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Aramendía PF, Braslavsky SE, Lagorio MG. Enrique San Román (1945–2019). Photochem Photobiol 2021. [DOI: 10.1111/php.13259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Hoffmann K, Nirmalananthan-Budau N, Resch-Genger U. Fluorescence calibration standards made from broadband emitters encapsulated in polymer beads for fluorescence microscopy and flow cytometry. Anal Bioanal Chem 2020; 412:6499-6507. [PMID: 32409890 PMCID: PMC7442758 DOI: 10.1007/s00216-020-02664-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 03/31/2020] [Accepted: 04/15/2020] [Indexed: 01/31/2023]
Abstract
We present here the design and characterization of a set of spectral calibration beads. These calibration beads are intended for the determination and regular control of the spectral characteristics of fluorescence microscopes and other fluorescence measuring devices for the readout of bead-based assays. This set consists of micrometer-sized polymer beads loaded with dyes from the liquid Calibration Kit Spectral Fluorescence Standards developed and certified by BAM for the wavelength-dependent determination of the spectral responsivity of fluorescence measuring devices like spectrofluorometers. To cover the wavelength region from 400 to 800 nm, two new near-infrared emissive dyes were included, which were spectroscopically characterized in solution and encapsulated in the beads. The resulting set of beads presents the first step towards a new platform of spectral calibration beads for the determination of the spectral characteristics of fluorescence instruments like fluorescence microscopes, FCM setups, and microtiter plate readers, thereby meeting the increasing demand for reliable and comparable fluorescence data especially in strongly regulated areas, e.g., medical diagnostics. This will eventually provide the basis for standardized calibration procedures for imaging systems as an alternative to microchannel slides containing dye solutions previously reported by us. Graphical abstract.
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Affiliation(s)
- Katrin Hoffmann
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Str. 11, 12489, Berlin, Germany
| | | | - Ute Resch-Genger
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Str. 11, 12489, Berlin, Germany.
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12
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Levitus M. Tutorial: measurement of fluorescence spectra and determination of relative fluorescence quantum yields of transparent samples. Methods Appl Fluoresc 2020; 8:033001. [DOI: 10.1088/2050-6120/ab7e10] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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Holz P, Brandenburg A. Calibration of systems for quantitative fluorescence analysis of thin layers. OPTICS EXPRESS 2019; 27:34559-34581. [PMID: 31878644 DOI: 10.1364/oe.27.034559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
Imaging fluorescence analysis is a powerful tool for the characterization of thin functional layers. Due to the development of new components such as cost-efficient and long life diode lasers and LEDs as well as sensitive cameras, the number of industrial in situ sensors based on fluorescence analysis technology increased rapidly in recent years. Of crucial importance for all these new sensors are efficient and robust methods for calibration. Although there are many examples for the calibration of laboratory setups for single specialized applications, there is no standardized method for the traceable device independent calibration of imaging fluorescence systems. This paper presents the evaluation of five different methods for the calibration of systems for quantitative fluorescence analysis. Each method is applied for the calibration of an imaging fluorescence laser scanner. In addition to characterizing the precision of the methods, the work analyzes the usability of the methods for different applications. The results show for the first time that a calibrated IR point sensor can be used for the auto calibration of high resolution imaging inline fluorescence sensors. In addition, we present a novel method for the transfer of calibration data between analysis systems with different optical setups by using a solid material fluorescence standard.
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Vinegoni C, Feruglio PF, Gryczynski I, Mazitschek R, Weissleder R. Fluorescence anisotropy imaging in drug discovery. Adv Drug Deliv Rev 2019; 151-152:262-288. [PMID: 29410158 PMCID: PMC6072632 DOI: 10.1016/j.addr.2018.01.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 12/15/2022]
Abstract
Non-invasive measurement of drug-target engagement can provide critical insights in the molecular pharmacology of small molecule drugs. Fluorescence polarization/fluorescence anisotropy measurements are commonly employed in protein/cell screening assays. However, the expansion of such measurements to the in vivo setting has proven difficult until recently. With the advent of high-resolution fluorescence anisotropy microscopy it is now possible to perform kinetic measurements of intracellular drug distribution and target engagement in commonly used mouse models. In this review we discuss the background, current advances and future perspectives in intravital fluorescence anisotropy measurements to derive pharmacokinetic and pharmacodynamic measurements in single cells and whole organs.
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Affiliation(s)
- Claudio Vinegoni
- Center for System Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
| | - Paolo Fumene Feruglio
- Center for System Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA; Department of Neurological, Biomedical and Movement Sciences, University of Verona, Verona, Italy
| | - Ignacy Gryczynski
- University of North Texas Health Science Center, Institute for Molecular Medicine, Fort Worth, TX, United States
| | - Ralph Mazitschek
- Center for System Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Ralph Weissleder
- Center for System Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
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González MTP, de Mello SMG, da Silva Emery F. Influence of 1,3,5-triazine Core and Electron Donor Group in Photophysical Properties of BODIPY Dyes. J Fluoresc 2019; 29:845-852. [DOI: 10.1007/s10895-019-02389-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 05/06/2019] [Indexed: 11/24/2022]
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16
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Nawara K, Waluk J. Goodbye to Quinine in Sulfuric Acid Solutions as a Fluorescence Quantum Yield Standard. Anal Chem 2019; 91:5389-5394. [DOI: 10.1021/acs.analchem.9b00583] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Krzysztof Nawara
- Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
| | - Jacek Waluk
- Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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Dos Santos JS, Ramos LC, Ferreira LP, Campo VL, de Rezende LCD, da Silva Emery F, Santana da Silva R. Cytotoxicity, cellular uptake, and subcellular localization of a nitrogen oxide and aminopropyl-β-lactose derivative ruthenium complex used as nitric oxide delivery agent. Nitric Oxide 2019; 86:38-47. [PMID: 30790696 DOI: 10.1016/j.niox.2019.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 12/15/2018] [Accepted: 02/13/2019] [Indexed: 12/29/2022]
Abstract
This work investigates how the luminescent ruthenium-nitrite complexes cis-[Ru(py-bodipy)(dcbpy)2(NO2)](PF6) (I) and cis-[Ru(py-bodipy)(dcbpy-aminopropyl-β-lactose)2(NO2)](PF6) (II) behave toward the melanoma cancer cell line B16F10. The chemical structure and purity of the synthesized complexes were analyzed by UV-Visible and FTIR spectroscopy, MALDI, HPLC, and 1H NMR. Spectrofluorescence helped to determine the fluorescence quantum yields and lifetimes of each of these complexes. In vitro MTT cell viability assay on B16F10 cancer cells revealed that the complexes possibly have a tumoricidal role. The metal-nitrite complexes evidenced the dichotomous NO nature: at high concentration, NO exerted a tumoricidal effect, whereas cancer cells grew at low NO concentration. Flow cytometry or fluorescence microscopy aided cellular uptake calculation. Cell staining followed by fluorescence microscopy associated with organelle markers such as DAPI and Rhodamine 123 detected preferential intracellular localization of the ruthenium-nitrite py-bodipy and aminopropyl lactose derivative ruthenium complex in mitochondria. Thus, the cytotoxicity of compounds (I) and (II) against B16F10 cancer cell line show concentration-dependent results. The present studies suggest that nitric oxide ruthenium derivative compounds could be new potential chemotherapeutic agents against cytotoxic cells.
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Affiliation(s)
- Joicy Santamalvina Dos Santos
- Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Prof. Zeferino Vaz s/n, CEP, 14040-903, Ribeirão Preto, SP, Brazil; Departamento de Química Geral e Inorgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Geremoabo, 147, Campus Universitário de Ondina, C.E.P. 40.170-115, Salvador, BA, Brazil
| | - Loyanne C Ramos
- Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Prof. Zeferino Vaz s/n, CEP, 14040-903, Ribeirão Preto, SP, Brazil
| | - Lucimara P Ferreira
- Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, CEP, 14040-901, Ribeirão Preto, SP, Brazil
| | - Vanessa Leira Campo
- Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Prof. Zeferino Vaz s/n, CEP, 14040-903, Ribeirão Preto, SP, Brazil; Barão de Mauá University Centre, 423 Ramos de Azevedo Street, Jardim Paulista, CEP 14090-180, Ribeirão Preto, SP, Brazil
| | - Lucas C D de Rezende
- Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Prof. Zeferino Vaz s/n, CEP, 14040-903, Ribeirão Preto, SP, Brazil
| | - Flávio da Silva Emery
- Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Prof. Zeferino Vaz s/n, CEP, 14040-903, Ribeirão Preto, SP, Brazil
| | - Roberto Santana da Silva
- Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Prof. Zeferino Vaz s/n, CEP, 14040-903, Ribeirão Preto, SP, Brazil.
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Nawara K, Rana A, Panda PK, Waluk J. Versatile Approach for Reliable Determination of Both High and Low Values of Luminescence Quantum Yields. Anal Chem 2018; 90:10139-10143. [PMID: 30080412 DOI: 10.1021/acs.analchem.8b02751] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The determination of luminescence quantum yields by means of relative methods requires setting identical experimental conditions for both sample and reference compounds. This requirement has a critical impact on the applicability of these protocols, as it does not allow for the precise determination of low quantum-yield values using well-characterized high-quantum-yield standards. We show that using the simultaneous absorption and fluorescence-emission measurement (SAFE) approach [ Nawara and Waluk. Anal. Chem. 2017 , 89 , 8650 ], the sample and reference compounds can be effectively measured with different excitation-slit spectral bandpass or integration times, separately optimized for each chromophore. This unique feature simplifies the determination of luminescence quantum yields, allowing measurements of low quantum-yield values using well-characterized high-quantum-yield standards.
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Affiliation(s)
- Krzysztof Nawara
- Faculty of Mathematics and Science , Cardinal Stefan Wyszyński University , Dewajtis 5 , 01-815 Warsaw , Poland
| | - Anup Rana
- School of Chemistry and Advanced Centre of Research in High Energy Materials (ACRHEM) , University of Hyderabad , 500046 Hyderabad , India
| | - Pradeepta K Panda
- School of Chemistry and Advanced Centre of Research in High Energy Materials (ACRHEM) , University of Hyderabad , 500046 Hyderabad , India
| | - Jacek Waluk
- Faculty of Mathematics and Science , Cardinal Stefan Wyszyński University , Dewajtis 5 , 01-815 Warsaw , Poland.,Institute of Physical Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
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Ryder AG, Stedmon CA, Harrit N, Bro R. Calibration, standardization, and quantitative analysis of multidimensional fluorescence (MDF) measurements on complex mixtures (IUPAC Technical Report). PURE APPL CHEM 2017. [DOI: 10.1515/pac-2017-0610] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
AbstractThis IUPAC Technical Report describes and compares the currently applied methods for the calibration and standardization of multi-dimensional fluorescence (MDF) spectroscopy data as well as recommendations on the correct use of chemometric methods for MDF data analysis. The paper starts with a brief description of the measurement principles for the most important MDF techniques and a short introduction to the most important applications. Recommendations are provided for instrument calibration, sample preparation and handling, and data collection, as well as the proper use of chemometric data analysis methods.
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Affiliation(s)
- Alan G. Ryder
- Nanoscale Biophotonics Laboratory, School of Chemistry, National University of Ireland, Galway, Ireland
| | - Colin A. Stedmon
- National Institute for Aquatic Resources, Technical University of Denmark, DK-2800, Kgs.Lyngby, Denmark
| | - Niels Harrit
- Nanoscience Center, H. C. Ørsted Institute, Universitetsparken 5, University of Copenhagen, DK-2100, Copenhagen, Denmark
| | - Rasmus Bro
- Department Food Science, Faculty of Life Sciences, University Copenhagen, DK-1958, Frederiksberg, Denmark
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20
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Molecular-Based Fluorescent Nanoparticles Built from Dedicated Dipolar Thienothiophene Dyes as Ultra-Bright Green to NIR Nanoemitters. Molecules 2016; 21:molecules21091227. [PMID: 27649124 PMCID: PMC6273080 DOI: 10.3390/molecules21091227] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/02/2016] [Accepted: 09/06/2016] [Indexed: 11/16/2022] Open
Abstract
Fluorescent Organic Nanoparticles (FONs), prepared by self-aggregation of dedicated dyes in water, represent a promising green alternative to the toxic quantum dots (QDs) for bioimaging purposes. In the present paper, we describe the synthesis and photophysical properties of new dipolar push-pull derivatives built from thieno[3,2-b]thiophene as a π-conjugated bridge that connects a triphenylamine moiety bearing various bulky substituents as electron-releasing moiety to acceptor end-groups of increasing strength (i.e., aldehyde, dicyanovinyl and diethylthiobarbiturate). All dyes display fluorescence properties in chloroform, which shifts from the green to the NIR range depending on the molecular polarization (i.e., strength of the end-groups) as well as a large two-photon absorption (TPA) band response in the biological spectral window (700-1000 nm). The TPA bands show a bathochromic shift and hyperchromic effect with increasing polarization of the dyes with maximum TPA cross-section reaching 2000 GM for small size chromophore. All dyes are found to form stable and deeply colored nanoparticles (20-45 nm in diameter) upon nanoprecipitation in water. Although their fluorescence is strongly reduced upon aggregation, all nanoparticles show large one-photon (up to 10⁸ M(-1)·cm(-1) in the visible region) and two-photon (up to 10⁶ GM in the NIR) brightness. Interestingly, both linear and non-linear optical properties are significantly affected by interchromophoric interactions, which are promoted by the molecular confinement and modulated by both the dipolar strength and the presence of the bulky groups. Finally, we exploited the photophysical properties of the FONs to design optimized core-shell nanoparticles built from a pair of complementary dipolar dyes that promotes an efficient core-to-shell FRET process. The resulting molecular-based core-shell nanoparticles combine large two-photon absorption and enhanced emission both located in the NIR spectral region, thanks to a major amplification (by a factor of 20) of the core fluorescence quantum yield. These novel nanoparticles, which combine huge one-and two-photon brightness, hold major promise for in vivo optical bioimaging.
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21
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Ishida H, Bünzli JC, Beeby A. Guidelines for measurement of luminescence spectra and quantum yields of inorganic and organometallic compounds in solution and solid state (IUPAC Technical Report). PURE APPL CHEM 2016. [DOI: 10.1515/pac-2014-0706] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractGuidelines for measuring the luminescence of inorganic compounds, metal complexes, and organometallic compounds are described. Common textbooks and manuals describing luminescence measurements are usually targeted for organic compounds, and are not always suitable for inorganic and organometallic compounds, which emit room-temperature phosphorescence. The report describes problems that researchers may confront while recording emission data and elaborates clear procedures to avoid these problems and provide adequate standardized protocols.
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Affiliation(s)
- Hitoshi Ishida
- 1Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Jean-Claude Bünzli
- 2Swiss Federal Institute of Technology Lausanne (EPFL) Institute of Chemical Sciences and Engineering BCH 1402, CH-1015 Lausanne, Switzerland and Haimen Institute of Science and Technology, Hong Kong Baptist University, Hong Kong, SAR, P.R. China
| | - Andrew Beeby
- 3Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom of Great Britain and Northern Ireland
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22
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Hoffmann K, Spieles M, Bremser W, Resch-Genger U. Narrow-Band Emitting Solid Fluorescence Reference Standard with Certified Intensity Pattern. Anal Chem 2015; 87:7204-10. [PMID: 26077510 DOI: 10.1021/acs.analchem.5b02209] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of a lanthanum-phosphate glass doped with several rare-earth-ions for use as solid fluorescence standard is described. The cuvette-shaped reference material which shows a characteristic emission intensity pattern upon excitation at 365 nm consisting of a multitude of relatively narrow emission bands in the wavelength region between 450 and 700 nm is intended for the day-to-day performance validation of fluorescence measuring devices. Evaluation of the fluorescent glass includes the determination of all properties which can affect its relative emission intensity profile or contribute to the uncertainty of the certified values like absorption spectra, fluorescence anisotropy, excitation wavelength, and temperature dependence of the spectroscopic features, homogeneity of fluorophore distribution, and photo- and long-term stability. Moreover, a certification procedure was developed including the normalization of the intensity profile consisting of several narrow emission bands and the calculation of wavelength-dependent uncertainties. Criteria for the design, characterization, and working principle of the new reference material BAM-F012 are presented, and possible applications of this ready-to-use fluorescence standard are discussed.
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Affiliation(s)
- Katrin Hoffmann
- BAM Federal Institute for Materials Research and Testing, Division 1.10, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Monika Spieles
- BAM Federal Institute for Materials Research and Testing, Division 1.10, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Wolfram Bremser
- BAM Federal Institute for Materials Research and Testing, Division 1.10, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Ute Resch-Genger
- BAM Federal Institute for Materials Research and Testing, Division 1.10, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
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23
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Solvent Dependency in the Quantum Efficiency of 4-[(4-Aminophenyl)-(4-imino-1-cyclohexa-2, 5- dienylidene) methyl] Aniline Hydrochloride. J Fluoresc 2015; 25:739-44. [PMID: 25820872 DOI: 10.1007/s10895-015-1560-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 03/16/2015] [Indexed: 10/23/2022]
Abstract
In the present work dual beam thermal lens technique is used for studying the solvent dependency on the quantum efficiency of a novel dye used for biomedical applications. The role of solvent in the absolute fluorescence quantum yield of 4-[(4-Aminophenyl)-(4-imino-1-cyclohexa-2, 5- dienylidene) methyl] aniline hydrochloride is studied using thermal lens technique. It is observed that the variation in solvents and its concentration results considerable variations in the fluorescence quantum yield. These variations are due to the non-radiative relaxation of the absorbed energy and because of the different solvent properties. The highest quantum yield of the dye is observed in the polar protic solvent-water.
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Würth C, Geißler D, Behnke T, Kaiser M, Resch-Genger U. Critical review of the determination of photoluminescence quantum yields of luminescent reporters. Anal Bioanal Chem 2014; 407:59-78. [DOI: 10.1007/s00216-014-8130-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 08/15/2014] [Accepted: 08/22/2014] [Indexed: 12/13/2022]
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Pathrose B, Sahira H, Nampoori VPN, Radhakrishnan P, Mujeeb A. Variations in fluorescence quantum yield of basic fuchsin with silver nanoparticles prepared by femtosecond laser ablation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 128:522-526. [PMID: 24691366 DOI: 10.1016/j.saa.2014.02.078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 01/29/2014] [Accepted: 02/11/2014] [Indexed: 06/03/2023]
Abstract
Nano structured noble metals have very important applications in diverse fields such as photovoltaics, catalysis, electronic and magnetic devices, etc. In the present work, the application of dual beam thermal lens technique is employed for the determination of the absolute fluorescence quantum yield of the triaminotriphenylmethane dye, basic fuchsin in the presence of silver sol is studied. Silver sol is prepared by femtosecond laser ablation. It is observed that the presence of silver sol decreases the fluorescence quantum efficiency. The observed results are in line with the conclusion that the reduction in quantum yield in the quenching region is essentially due to the non-radiative relaxation of the absorbed energy. It is also observed that the presence of silver sol enhances the thermal lens signal which makes its detection easier at any concentration.
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Affiliation(s)
- Bini Pathrose
- International School of Photonics, Cochin University of Science and Technology, Cochin, Kerala, India.
| | - H Sahira
- Department of Microbiology, Medical College, Thiruvananthapuram, Kerala, India.
| | - V P N Nampoori
- International School of Photonics, Cochin University of Science and Technology, Cochin, Kerala, India.
| | - P Radhakrishnan
- International School of Photonics, Cochin University of Science and Technology, Cochin, Kerala, India.
| | - A Mujeeb
- International School of Photonics, Cochin University of Science and Technology, Cochin, Kerala, India; LBS Centre for Science and Technology, Thiruvananthapuram, Kerala, India.
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Pathrose B, Nampoori VPN, Radhakrishnan P, Mujeeb A. Measurement of Absolute Fluorescence Quantum Yield of Basic Fuchsin Solution Using a Dual-Beam Thermal Lens Technique. J Fluoresc 2014; 24:895-8. [DOI: 10.1007/s10895-014-1369-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 02/24/2014] [Indexed: 12/17/2022]
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Resch-Genger U, Rurack K. Determination of the photoluminescence quantum yield of dilute dye solutions (IUPAC Technical Report). PURE APPL CHEM 2013. [DOI: 10.1351/pac-rep-12-03-03] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Procedures for the determination of photoluminescence quantum yields with optical
methods are addressed, and challenges associated with these measurements are
discussed. Special emphasis is dedicated to relative measurements of fluorescent
(i.e., short excited-state lifetime), transparent, dilute dye solutions in
conventional cuvettes in a 0°/90° measurement geometry.
Recommendations on the selection of suitable quantum yield standards are
presented, and requirements for the documentation of photoluminescence quantum
yields are derived.
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Cunha Dias de Rezende L, Menezes Vaidergorn M, Biazzotto Moraes JC, da Silva Emery F. Synthesis, photophysical properties and solvatochromism of meso-substituted tetramethyl BODIPY dyes. J Fluoresc 2013; 24:257-66. [PMID: 24008989 DOI: 10.1007/s10895-013-1293-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 08/21/2013] [Indexed: 11/26/2022]
Abstract
The 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene fluorescent dyes (BODIPYs) were first synthesized almost 50 years ago; however, the exploration of their technological application has only begun in the last 20 years. These dyes possess interesting photophysical properties, increasing interest in their application as fluorescent markers and/or dyes. Herein, we report the synthesis of tetramethyl BODIPY and four meso-substituted dyes (2-thienyl, 4-pyridinyl, 4-fluorophenyl and 4-nitrophenyl derivatives). Their photophysical characterization (absorption spectra, emission spectra, fluorescence quantum yields and time-resolved fluorescence) and solvatochromic behavior were studied. Absorption and emission were barely affected by substituents, with a slightly higher stokes shift observed in the substituted dyes. Substitutions could be associated with a shorter fluorescence lifetime and lower quantum yields. Good correlations were observed between the Catalán solvent descriptors and the photophysical parameters. Also, better correlation was observed between the solvent polarizability descriptor (SP) and photophysical parameters. Overall, only slight solvatochromism was observed. The 4-pyridinyl derivative was the subject of a relatively significant solvatochromism regarding the wavelengths of the emission spectra, with the observation of a bathochromically shifted emission in methanol. The fluorescence quantum yield of the 4-nitrophenyl substituted BODIPY was approximately 30 times higher in hexane, which may be of interest for practical applications.
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Affiliation(s)
- Lucas Cunha Dias de Rezende
- Faculty of Pharmaceutical Sciences at Ribeirao Preto, University of São Paulo, Ribeirão Preto, 14040-903, Brazil
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Würth C, Grabolle M, Pauli J, Spieles M, Resch-Genger U. Relative and absolute determination of fluorescence quantum yields of transparent samples. Nat Protoc 2013; 8:1535-50. [DOI: 10.1038/nprot.2013.087] [Citation(s) in RCA: 670] [Impact Index Per Article: 60.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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30
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Abstract
Procedures for the characterization of photoluminescence measuring systems are
discussed, focusing on spectrofluorometers and fit-for-purpose methods including
suitable standards. The aim here is to increase the awareness for the importance
of a reliable instrument characterization and to improve the reliability and
comparability of measurements of photoluminescence.
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Resch-Genger U, Bremser W, Pfeifer D, Spieles M, Hoffmann A, DeRose PC, Zwinkels JC, Gauthier F, Ebert B, Taubert RD, Monte C, Voigt J, Hollandt J, Macdonald R. State-of-the art comparability of corrected emission spectra. 1. Spectral correction with physical transfer standards and spectral fluorescence standards by expert laboratories. Anal Chem 2012; 84:3889-98. [PMID: 22376085 DOI: 10.1021/ac2034503] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of fluorescence applications in the life and material sciences has proceeded largely without sufficient concern for the measurement uncertainties related to the characterization of fluorescence instruments. In this first part of a two-part series on the state-of-the-art comparability of corrected emission spectra, four National Metrology Institutes active in high-precision steady-state fluorometry performed a first comparison of fluorescence measurement capabilities by evaluating physical transfer standard (PTS)-based and reference material (RM)-based calibration methods. To identify achievable comparability and sources of error in instrument calibration, the emission spectra of three test dyes in the wavelength region from 300 to 770 nm were corrected and compared using both calibration methods. The results, obtained for typical spectrofluorometric (0°/90° transmitting) and colorimetric (45°/0° front-face) measurement geometries, demonstrated a comparability of corrected emission spectra within a relative standard uncertainty of 4.2% for PTS- and 2.4% for RM-based spectral correction when measurements and calibrations were performed under identical conditions. Moreover, the emission spectra of RMs F001 to F005, certified by BAM, Federal Institute for Materials Research and Testing, were confirmed. These RMs were subsequently used for the assessment of the comparability of RM-based corrected emission spectra of field laboratories using common commercial spectrofluorometers and routine measurement conditions in part 2 of this series (subsequent paper in this issue).
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Affiliation(s)
- Ute Resch-Genger
- Division I.5, BAM, Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany.
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Resch-Genger U, Bremser W, Pfeifer D, Spieles M, Hoffmann A, DeRose PC, Zwinkels JC, Gauthier F, Ebert B, Taubert RD, Voigt J, Hollandt J, Macdonald R. State-of-the art comparability of corrected emission spectra. 2. Field laboratory assessment of calibration performance using spectral fluorescence standards. Anal Chem 2012; 84:3899-907. [PMID: 22376144 DOI: 10.1021/ac203451g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the second part of this two-part series on the state-of-the-art comparability of corrected emission spectra, we have extended this assessment to the broader community of fluorescence spectroscopists by involving 12 field laboratories that were randomly selected on the basis of their fluorescence measuring equipment. These laboratories performed a reference material (RM)-based fluorometer calibration with commercially available spectral fluorescence standards following a standard operating procedure that involved routine measurement conditions and the data evaluation software LINKCORR developed and provided by the Federal Institute for Materials Research and Testing (BAM). This instrument-specific emission correction curve was subsequently used for the determination of the corrected emission spectra of three test dyes, X, QS, and Y, revealing an average accuracy of 6.8% for the corrected emission spectra. This compares well with the relative standard uncertainties of 4.2% for physical standard-based spectral corrections demonstrated in the first part of this study (previous paper in this issue) involving an international group of four expert laboratories. The excellent comparability of the measurements of the field laboratories also demonstrates the effectiveness of RM-based correction procedures.
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Affiliation(s)
- Ute Resch-Genger
- Division I.5, BAM, Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany.
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Determination of the absolute fluorescence quantum yield of rhodamine 6G with optical and photoacoustic methods – Providing the basis for fluorescence quantum yield standards. Talanta 2012; 90:30-7. [DOI: 10.1016/j.talanta.2011.12.051] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Revised: 12/14/2011] [Accepted: 12/18/2011] [Indexed: 11/23/2022]
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Würth C, Pauli J, Lochmann C, Spieles M, Resch-Genger U. Integrating Sphere Setup for the Traceable Measurement of Absolute Photoluminescence Quantum Yields in the Near Infrared. Anal Chem 2012; 84:1345-52. [DOI: 10.1021/ac2021954] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Christian Würth
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489
Berlin, Germany
| | - Jutta Pauli
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489
Berlin, Germany
| | - Cornelia Lochmann
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489
Berlin, Germany
| | - Monika Spieles
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489
Berlin, Germany
| | - Ute Resch-Genger
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489
Berlin, Germany
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Das S, Powe AM, Baker GA, Valle B, El-Zahab B, Sintim HO, Lowry M, Fakayode SO, McCarroll ME, Patonay G, Li M, Strongin RM, Geng ML, Warner IM. Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry. Anal Chem 2011; 84:597-625. [DOI: 10.1021/ac202904n] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Susmita Das
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Aleeta M. Powe
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, United States
| | - Gary A. Baker
- Department of Chemistry, University of Missouri−Columbia, Columbia, Missouri 65211-7600, United States
| | - Bertha Valle
- Department of Chemistry, Texas Southern University, Houston, Texas 77004, United States
| | - Bilal El-Zahab
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Herman O. Sintim
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Mark Lowry
- Department of Chemistry, Portland State University, Portland, Oregon 97207, United States
| | - Sayo O. Fakayode
- Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, United States
| | - Matthew E. McCarroll
- Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901-4409, United States
| | - Gabor Patonay
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302-4098, United States
| | - Min Li
- Process Development Center, Albemarle Corporation, Baton Rouge, Louisiana 70805, United States
| | - Robert M. Strongin
- Department of Chemistry, Portland State University, Portland, Oregon 97207, United States
| | - Maxwell L. Geng
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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Abstract
The use of standards for the measurement of photoluminescence quantum yields (QYs) in dilute solutions is reviewed. Only three standards can be considered well established. Another group of six standards has been investigated by several independent researchers. A large group of standards is frequently used in recent literature, but the validity of these is less certain. The needs for future development comprise: (i) confirmation of the validity of the QY values of many commonly used standard materials, preferably in the form of SI traceable standards; (ii) extension of the set of standard materials to the UV and near-IR spectral ranges; and (iii) good standards or robust protocols for the measurements of low QYs.
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Würth C, Grabolle M, Pauli J, Spieles M, Resch-Genger U. Comparison of Methods and Achievable Uncertainties for the Relative and Absolute Measurement of Photoluminescence Quantum Yields. Anal Chem 2011; 83:3431-9. [DOI: 10.1021/ac2000303] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christian Würth
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany
| | - Markus Grabolle
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany
| | - Jutta Pauli
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany
| | - Monika Spieles
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany
| | - Ute Resch-Genger
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany
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