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Mazumder A, Vinod K, Maret PD, Das PP, Hariharan M. Symmetry-Breaking Charge Separation Mediated Triplet Population in a Perylenediimide Trimer at the Single-Molecule Level. J Phys Chem Lett 2024; 15:5896-5904. [PMID: 38805687 DOI: 10.1021/acs.jpclett.4c01201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Herein, we demonstrate triplet excited-state population in a conformationally rigid perylenediimide trimer (PDI-T) via intramolecular symmetry-breaking charge separation (SB-CS) at the single-molecule level. The single-molecule fluorescence intensity trajectories of PDI-T in nonpolar polystyrene matrix (ε = 2.60) exhibit prolonged fluorescence with infrequent dark states, representing the triplet and/or the charge transfer states. In contrast, in a poly(vinyl alcohol) matrix (ε = 7.80), erratic blinking dynamics resulting in low photon counts were observed, corroborating the feasibility of charge separation in a polar environment. In agreement with the single-molecule measurements, transient absorption spectroscopy of PDI-T reveals ultrafast SB-CS (τCS < 5 ps) in polar tetrahydrofuran (ε = 7.58) and acetone (ε = 20.70), with the population of the triplet excited-state through charge recombination. The current investigation shows the utility of rigid and weakly coupled molecular constructs in controlling triplet generation and SB-CS for potential applications in optoelectronic devices.
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Affiliation(s)
- Aniruddha Mazumder
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Kavya Vinod
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Philip Daniel Maret
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Pallavi Panthakkal Das
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Mahesh Hariharan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
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2
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Mazal H, Wieser FF, Sandoghdar V. Insights into protein structure using cryogenic light microscopy. Biochem Soc Trans 2023; 51:2041-2059. [PMID: 38015555 PMCID: PMC10754291 DOI: 10.1042/bst20221246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/29/2023]
Abstract
Fluorescence microscopy has witnessed many clever innovations in the last two decades, leading to new methods such as structured illumination and super-resolution microscopies. The attainable resolution in biological samples is, however, ultimately limited by residual motion within the sample or in the microscope setup. Thus, such experiments are typically performed on chemically fixed samples. Cryogenic light microscopy (Cryo-LM) has been investigated as an alternative, drawing on various preservation techniques developed for cryogenic electron microscopy (Cryo-EM). Moreover, this approach offers a powerful platform for correlative microscopy. Another key advantage of Cryo-LM is the strong reduction in photobleaching at low temperatures, facilitating the collection of orders of magnitude more photons from a single fluorophore. This results in much higher localization precision, leading to Angstrom resolution. In this review, we discuss the general development and progress of Cryo-LM with an emphasis on its application in harnessing structural information on proteins and protein complexes.
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Affiliation(s)
- Hisham Mazal
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
- Max-Planck-Zentrum für Physik und Medizin, 91058 Erlangen, Germany
| | - Franz-Ferdinand Wieser
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
- Max-Planck-Zentrum für Physik und Medizin, 91058 Erlangen, Germany
- Friedrich-Alexander University of Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Vahid Sandoghdar
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
- Max-Planck-Zentrum für Physik und Medizin, 91058 Erlangen, Germany
- Friedrich-Alexander University of Erlangen-Nürnberg, 91058 Erlangen, Germany
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3
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Maret PD, Sasikumar D, Sebastian E, Hariharan M. Symmetry-Breaking Charge Separation in a Chiral Bis(perylenediimide) Probed at Ensemble and Single-Molecule Levels. J Phys Chem Lett 2023; 14:8667-8675. [PMID: 37733055 DOI: 10.1021/acs.jpclett.3c01889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Chiral molecular assemblies exhibiting symmetry-breaking charge separation (SB-CS) are potential candidates for the development of chiral organic semiconductors. Herein, we explore the excited-state dynamics of a helically chiral perylenediimide bichromophore (Cy-PDI2) exhibiting SB-CS at the ensemble and single-molecule levels. Solvent polarity-tunable interchromophoric excitonic coupling in chiral Cy-PDI2 facilitates the interplay of SB-CS and excimer formation in the ensemble domain. Analogous to the excited-state dynamics of Cy-PDI2 at the ensemble level, single-molecule fluorescence lifetime traces of Cy-PDI2 depicted long-lived off-states characteristic of the radical ion pair-mediated dark states. The discrete electron transfer and charge separation dynamics in Cy-PDI2 at the single-molecule level are governed by the distinct influence of the local environment. The present study aims at understanding the fundamental excited-state dynamics in chiral organic bichromophores for designing efficient chiral organic semiconductors and applications toward charge transport materials.
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Affiliation(s)
- Philip Daniel Maret
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Devika Sasikumar
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Ebin Sebastian
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Mahesh Hariharan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala P.O., Vithura, Thiruvananthapuram, Kerala 695551, India
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Han S, Qin C, Song Y, Dong S, Lei Y, Wang S, Su X, Wei A, Li X, Zhang G, Chen R, Hu J, Xiao L, Jia S. Photostable fluorescent molecules on layered hexagonal boron nitride: Ideal single-photon sources at room temperature. J Chem Phys 2021; 155:244301. [PMID: 34972379 DOI: 10.1063/5.0074706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Photoblinking and photobleaching are commonly encountered problems for single-photon sources. Numerous methods have been devised to suppress these two impediments; however, either the preparation procedures or the operating conditions are relatively harsh, making them difficult to apply to practical applications. Here, we reported giant suppression of both photoblinking and photobleaching of a single fluorescent molecule, terrylene, via the utilization of hexagonal boron nitride (h-BN) flakes as substrates. Experimentally, a much-prolonged survival time of terrylene has been determined, which can have a photostable emission over 2 h at room temperature under ambient atmospheres. Compared with single molecules on a SiO2/Si substrate or glass coverslip, a more than 100-fold increase in the total number of photons collected from each terrylene on h-BN flakes has been demonstrated. We also proved that the photostability of terrylene molecules can be well maintained for more than 6 months even under ambient conditions without any further protection. Our results demonstrate that the utilization of h-BN flakes to suppress photoblinking and photobleaching of fluorescent molecules has promising applications in the production of high-quality single-photon sources at room temperature.
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Affiliation(s)
- Shuangping Han
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Chengbing Qin
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Yunrui Song
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Shuai Dong
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Yu Lei
- College of Physics and Electronics Engineering, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Shen Wang
- College of Physics and Electronics Engineering, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Xingliang Su
- College of Physics and Electronics Engineering, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Aoni Wei
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Xiangdong Li
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Guofeng Zhang
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Ruiyun Chen
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Jianyong Hu
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Liantuan Xiao
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Suotang Jia
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi 030006, China
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De Silva TPD, Youm SG, Fronczek FR, Sahasrabudhe G, Nesterov EE, Warner IM. Pyrene-Benzimidazole Derivatives as Novel Blue Emitters for OLEDs. Molecules 2021; 26:molecules26216523. [PMID: 34770936 PMCID: PMC8588490 DOI: 10.3390/molecules26216523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/22/2021] [Accepted: 10/24/2021] [Indexed: 11/16/2022] Open
Abstract
Three novel small organic heterocyclic compounds: 2-(1,2-diphenyl)-1H-benzimidazole-7-tert-butylpyrene (compound A), 1,3-di(1,2-diphenyl)-1H-benzimidazole-7-tert-butylpyrene (compound B), and 1,3,6,8-tetra(1,2-diphenyl)-1H-benzimidazolepyrene (compound C) were synthesized and characterized for possible applications as blue OLED emitters. The specific molecular design targeted decreasing intermolecular aggregation and disrupting crystallinity in the solid-state, in order to reduce dye aggregation, and thus obtain efficient pure blue photo- and electroluminescence. Accordingly, the new compounds displayed reasonably high spectral purity in both solution- and solid-states with average CIE coordinates of (0.160 ± 0.005, 0.029 ± 0.009) in solution and (0.152 ± 0.007, 0.126 ± 0.005) in solid-state. These compounds showed a systematic decrease in degree of crystallinity and intermolecular aggregation due to increasing steric hindrance, as revealed using powder X-ray diffraction analysis and spectroscopic studies. An organic light-emitting diode (OLED) prototype fabricated using compound B as the non-doped emissive layer displayed an external quantum efficiency (EQE) of 0.35 (±0.04)% and luminance 100 (±6) cd m−2 at 5.5 V with an essentially pure blue electroluminescence corresponding to CIE coordinates of (0.1482, 0.1300). The highest EQE observed from this OLED prototype was 4.3 (±0.3)% at 3.5 V, and the highest luminance of 290 (±10) cd m−2 at 7.5 V. These values were found comparable to characteristics of the best pure blue OLED devices based on simple fluorescent small-molecule organic chromophores.
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Affiliation(s)
| | - Sang Gil Youm
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115, USA; (S.G.Y.); (E.E.N.)
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA; (T.P.D.D.S.); (F.R.F.); (G.S.)
| | - Girija Sahasrabudhe
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA; (T.P.D.D.S.); (F.R.F.); (G.S.)
| | - Evgueni E. Nesterov
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115, USA; (S.G.Y.); (E.E.N.)
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA; (T.P.D.D.S.); (F.R.F.); (G.S.)
- Correspondence: ; Tel.: +1-225-578-2829; Fax: +1-225-578-3971
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Rogowska M, Hansen PA, Sønsteby HH, Dziadkowiec J, Valen H, Nilsen O. Molecular layer deposition of photoactive metal-naphthalene hybrid thin films. Dalton Trans 2021; 50:12896-12905. [PMID: 34581358 DOI: 10.1039/d1dt02201f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We here report on photoactive organic-inorganic hybrid thin films prepared by the molecular layer deposition (MLD) method. The new series of hybrid films deposited using 2,6-naphthalenedicarboxylic acid (2,6-NDC) and either hafnium chloride (HfCl4), yttrium tetramethylheptanedionate (Y(thd)3) or titanium chloride (TiCl4) were compared with the known zirconium chloride (ZrCl4) based system. All metal-naphthalene films are amorphous as-deposited and show self-saturating growth as expected for an ideal MLD process with varied growth rates depending on the choice of metal precursor. The growth was studied in situ using quartz crystal microbalance (QCM) and the films were further characterised using spectroscopic ellipsometry (SE), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and UV-Vis and photoluminescence (PL) spectroscopy to obtain information on their physicochemical properties. The hybrid thin films display intense blue photoluminescence, except for the Ti-organic complex in which titanium clusters were found to be an effective PL quencher for the organic linker. We demonstrate how the optical properties of the films depend on the choice of metal component to make a foundation for further studies on these types of organic-inorganic hybrid materials for applications as photoactive agents.
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Affiliation(s)
- Melania Rogowska
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, 0315 Oslo, Norway.
| | - Per-Anders Hansen
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, 0315 Oslo, Norway.
| | - Henrik Hovde Sønsteby
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, 0315 Oslo, Norway.
| | - Joanna Dziadkowiec
- The NJORD Centre, Department of Physics, University of Oslo, 0371 Oslo, Norway
| | - Håkon Valen
- Nordic Institute of Dental Materials, 0855 Oslo, Norway
| | - Ola Nilsen
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, 0315 Oslo, Norway.
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De Silva TD, Youm SG, Tamas GG, Yang B, Wang CH, Fronczek FR, Sahasrabudhe G, Sterling S, Quarels RD, Chhotaray PK, Nesterov EE, Warner IM. Pyrenylpyridines: Sky-Blue Emitters for Organic Light-Emitting Diodes. ACS OMEGA 2019; 4:16867-16877. [PMID: 31646233 PMCID: PMC6796915 DOI: 10.1021/acsomega.9b01948] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
A novel sky-blue-emitting tripyrenylpyridine derivative, 2,4,6-tri(1-pyrenyl)pyridine (2,4,6-TPP), has been synthesized using a Suzuki coupling reaction and compared with three previously reported isomeric dipyrenylpyridine (DPP) analogues (2,4-di(1-pyrenyl)pyridine (2,4-DPP), 2,6-di(1-pyrenyl)pyridine (2,6-DPP), and 3,5-di(1-pyrenyl)pyridine (3,5-DPP)). As revealed by single-crystal X-ray analysis and computational simulations, all compounds possess highly twisted conformations in the solid state with interpyrene torsional angles of 42.3°-57.2°. These solid-state conformations and packing variations of pyrenylpyridines could be correlated to observed variations in physical characteristics such as photo/thermal stability and spectral properties, but showed only marginal influence on electrochemical properties. The novel derivative, 2,4,6-TPP, exhibited the lowest degree of crystallinity as revealed by powder X-ray diffraction analysis and formed amorphous thin films as verified using grazing-incidence wide-angle X-ray scattering. This compound also showed high thermal/photo stability relative to its disubstituted analogues (DPPs). Thus, a nondoped organic light-emitting diode (OLED) prototype was fabricated using 2,4,6-TPP as the emissive layer, which displayed a sky-blue electroluminescence with Commission Internationale de L'Eclairage (CIE) coordinates of (0.18, 0.34). This OLED prototype achieved a maximum external quantum efficiency of 6.0 ± 1.2% at 5 V. The relatively high efficiency for this simple-architecture device reflects a good balance of electron and hole transporting ability of 2,4,6-TPP along with efficient exciton formation in this material and indicates its promise as an emitting material for design of blue OLED devices.
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Affiliation(s)
| | - Sang Gil Youm
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - George G. Tamas
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Boqian Yang
- Horiba Scientific, 20 Knightsbridge Road, Piscataway, New Jersey 08854, United States
| | - Chun-Han Wang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Girija Sahasrabudhe
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Sierra Sterling
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Rashanique D. Quarels
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Pratap K. Chhotaray
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Evgueni E. Nesterov
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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8
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Emergence of multiple fluorophores in individual cesium lead bromide nanocrystals. Nat Commun 2019; 10:2930. [PMID: 31266944 PMCID: PMC6606627 DOI: 10.1038/s41467-019-10870-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 06/06/2019] [Indexed: 12/03/2022] Open
Abstract
Cesium-based perovskite nanocrystals (PNCs) possess alluring optical and electronic properties via compositional and structural versatility, tunable bandgap, high photoluminescence quantum yield and facile chemical synthesis. Despite the recent progress, origins of the photoluminescence emission in various types of PNCs remains unclear. Here, we study the photon emission from individual three-dimensional and zero-dimensional cesium lead bromide PNCs. Using photon antibunching and lifetime measurements, we demonstrate that emission statistics of both type of PNCs are akin to individual molecular fluorophores, rather than traditional semiconductor quantum dots. Aided by density functional modelling, we provide compelling evidence that green emission in zero-dimensional PNCs stems from exciton recombination at bromide vacancy centres within lead-halide octahedra, unrelated to external confinement. These findings provide key information about the nature of defect formation and the origin of emission in cesium lead halide perovskite materials, which foster their utilization in the emerging optoelectronic applications. Inorganic perovskite nanocrystals attract lots of research attention but the origin of their photoluminescence remains debatable. Here Zhang et al. show that behavior of both CsPbBr3 and Cs4PbBr6 nanocrystals is like individual molecular fluorophores and independent of the structural dimensionalities.
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9
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Aaron J, Wait E, DeSantis M, Chew TL. Practical Considerations in Particle and Object Tracking and Analysis. ACTA ACUST UNITED AC 2019; 83:e88. [PMID: 31050869 DOI: 10.1002/cpcb.88] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The rapid advancement of live-cell imaging technologies has enabled biologists to generate high-dimensional data to follow biological movement at the microscopic level. Yet, the "perceived" ease of use of modern microscopes has led to challenges whereby sub-optimal data are commonly generated that cannot support quantitative tracking and analysis as a result of various ill-advised decisions made during image acquisition. Even optimally acquired images often require further optimization through digital processing before they can be analyzed. In writing this article, we presume our target audience to be biologists with a foundational understanding of digital image acquisition and processing, who are seeking to understand the essential steps for particle/object tracking experiments. It is with this targeted readership in mind that we review the basic principles of image-processing techniques as well as analysis strategies commonly used for tracking experiments. We conclude this technical survey with a discussion of how movement behavior can be mathematically modeled and described. © 2019 by John Wiley & Sons, Inc.
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Affiliation(s)
- Jesse Aaron
- Advanced Imaging Center, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia
| | - Eric Wait
- Advanced Imaging Center, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia
| | - Michael DeSantis
- Light Microscopy Facility, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia
| | - Teng-Leong Chew
- Advanced Imaging Center, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia.,Light Microscopy Facility, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia
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10
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Lynch PG, Richards H, Wustholz KL. Unraveling the Excited-State Dynamics of Eosin Y Photosensitizers Using Single-Molecule Spectroscopy. J Phys Chem A 2019; 123:2592-2600. [PMID: 30835475 DOI: 10.1021/acs.jpca.9b00409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The intersystem crossing and dispersive electron-transfer dynamics of eosin Y (EY) photosensitizers are probed using single-molecule microscopy. The blinking dynamics of EY on glass are quantified by constructing cumulative distribution functions of emissive ("on") and nonemissive ("off") events. Maximum likelihood estimation (MLE) and goodness-of-fit tests based on the Kolmogorov-Smirnov (KS) statistic are used to establish the best fit to the blinking data and differentiate among competitive photophysical processes. The on-time probability distributions for EY in N2 and air are power-law distributed after ∼1 s, with fit parameters that are significantly modified upon exposure to oxygen. By extending the statistically principled MLE/KS approach to include an onset time for log-normal behavior, we demonstrate that the off-time distribution for EY in N2 is best fit to a combination of exponential and log-normal functions. The corresponding distribution for EY in air is best fit to a log-normal function alone. Furthermore, power law and log-normal distributions are observed for an individual molecule in air, consistent with dynamic fluctuations in the rate constant for dark-state population and depopulation. These observations support the interpretation that dispersive electron transfer (i.e., the Albery model) from the first excited singlet state (S1) of EY to trap states on glass is predominately responsible for blinking in oxic conditions. In anoxic environment, both triplet-state blinking and dispersive electron transfer from S1 and the excited triplet state (T1) contribute to the excited-state dynamics of EY.
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Affiliation(s)
- Pauline G Lynch
- College of William and Mary , Department of Chemistry , P.O. Box 8795, Williamsburg , Virginia 23187 , United States
| | - Huw Richards
- College of William and Mary , Department of Chemistry , P.O. Box 8795, Williamsburg , Virginia 23187 , United States
| | - Kristin L Wustholz
- College of William and Mary , Department of Chemistry , P.O. Box 8795, Williamsburg , Virginia 23187 , United States
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11
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De Silva TPD, Sahasrabudhe G, Yang B, Wang CH, Chhotaray PK, Nesterov EE, Warner IM. Influence of Anion Variations on Morphological, Spectral, and Physical Properties of the Propidium Luminophore. J Phys Chem A 2018; 123:111-119. [PMID: 30556397 DOI: 10.1021/acs.jpca.8b06948] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Girija Sahasrabudhe
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Boqian Yang
- Horiba Scientific, 3880 Park Avenue, Edison, New Jersey 08820, United States
| | - Chun-Han Wang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Pratap K. Chhotaray
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Evgueni E. Nesterov
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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12
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Blumhardt P, Stein J, Mücksch J, Stehr F, Bauer J, Jungmann R, Schwille P. Photo-Induced Depletion of Binding Sites in DNA-PAINT Microscopy. Molecules 2018; 23:molecules23123165. [PMID: 30513691 PMCID: PMC6321339 DOI: 10.3390/molecules23123165] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/26/2018] [Accepted: 11/29/2018] [Indexed: 11/25/2022] Open
Abstract
The limited photon budget of fluorescent dyes is the main limitation for localization precision in localization-based super-resolution microscopy. Points accumulation for imaging in nanoscale topography (PAINT)-based techniques use the reversible binding of fluorophores and can sample a single binding site multiple times, thus elegantly circumventing the photon budget limitation. With DNA-based PAINT (DNA-PAINT), resolutions down to a few nanometers have been reached on DNA-origami nanostructures. However, for long acquisition times, we find a photo-induced depletion of binding sites in DNA-PAINT microscopy that ultimately limits the quality of the rendered images. Here we systematically investigate the loss of binding sites in DNA-PAINT imaging and support the observations with measurements of DNA hybridization kinetics via surface-integrated fluorescence correlation spectroscopy (SI-FCS). We do not only show that the depletion of binding sites is clearly photo-induced, but also provide evidence that it is mainly caused by dye-induced generation of reactive oxygen species (ROS). We evaluate two possible strategies to reduce the depletion of binding sites: By addition of oxygen scavenging reagents, and by the positioning of the fluorescent dye at a larger distance from the binding site.
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Affiliation(s)
- Philipp Blumhardt
- Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.
| | - Johannes Stein
- Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.
| | - Jonas Mücksch
- Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.
| | - Florian Stehr
- Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.
| | - Julian Bauer
- Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.
| | - Ralf Jungmann
- Molecular Imaging and Bionanotechnology, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.
- Department of Physics and Center for Nanoscience, Ludwig Maximilian University, Geschwister-Scholl-Platz 1, 80539 Munich, Germany.
| | - Petra Schwille
- Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.
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13
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Pietryga JM, Park YS, Lim J, Fidler AF, Bae WK, Brovelli S, Klimov VI. Spectroscopic and Device Aspects of Nanocrystal Quantum Dots. Chem Rev 2017; 116:10513-622. [PMID: 27677521 DOI: 10.1021/acs.chemrev.6b00169] [Citation(s) in RCA: 394] [Impact Index Per Article: 56.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The field of nanocrystal quantum dots (QDs) is already more than 30 years old, and yet continuing interest in these structures is driven by both the fascinating physics emerging from strong quantum confinement of electronic excitations, as well as a large number of prospective applications that could benefit from the tunable properties and amenability toward solution-based processing of these materials. The focus of this review is on recent advances in nanocrystal research related to applications of QD materials in lasing, light-emitting diodes (LEDs), and solar energy conversion. A specific underlying theme is innovative concepts for tuning the properties of QDs beyond what is possible via traditional size manipulation, particularly through heterostructuring. Examples of such advanced control of nanocrystal functionalities include the following: interface engineering for suppressing Auger recombination in the context of QD LEDs and lasers; Stokes-shift engineering for applications in large-area luminescent solar concentrators; and control of intraband relaxation for enhanced carrier multiplication in advanced QD photovoltaics. We examine the considerable recent progress on these multiple fronts of nanocrystal research, which has resulted in the first commercialized QD technologies. These successes explain the continuing appeal of this field to a broad community of scientists and engineers, which in turn ensures even more exciting results to come from future exploration of this fascinating class of materials.
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Affiliation(s)
- Jeffrey M Pietryga
- Nanotechnology and Advanced Spectroscopy Team, Chemistry Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Young-Shin Park
- Nanotechnology and Advanced Spectroscopy Team, Chemistry Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States.,Center for High Technology Materials, University of New Mexico , Albuquerque, New Mexico 87131, United States
| | - Jaehoon Lim
- Nanotechnology and Advanced Spectroscopy Team, Chemistry Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Andrew F Fidler
- Nanotechnology and Advanced Spectroscopy Team, Chemistry Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Wan Ki Bae
- Photo-Electronic Hybrids Research Center, Korea Institute of Science and Technology , Seoul 02792, Korea
| | - Sergio Brovelli
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca , I-20125 Milano, Italy
| | - Victor I Klimov
- Nanotechnology and Advanced Spectroscopy Team, Chemistry Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
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14
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Du S, Hernández-Gil J, Dong H, Zheng X, Lyu G, Bañobre-López M, Gallo J, Sun LD, Yan CH, Long NJ. Design and validation of a new ratiometric intracellular pH imaging probe using lanthanide-doped upconverting nanoparticles. Dalton Trans 2017; 46:13957-13965. [DOI: 10.1039/c7dt02418e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A ratiometric probe based on upconversion nanoparticles modified with a pH sensitive moiety for the quantitative imaging of pH at the subcellular level in living cells.
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Affiliation(s)
- Shuoren Du
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- Peking University
- Beijing 100871
- China
| | | | - Hao Dong
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- Peking University
- Beijing 100871
- China
| | - Xiaoyu Zheng
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- Peking University
- Beijing 100871
- China
| | - Guangming Lyu
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- Peking University
- Beijing 100871
- China
| | - Manuel Bañobre-López
- Advanced (Magnetic) Theranostic Nanostructures group
- INL-International Iberian Nanotechnology Laboratory
- 4715-330 Braga
- Portugal
| | - Juan Gallo
- Advanced (Magnetic) Theranostic Nanostructures group
- INL-International Iberian Nanotechnology Laboratory
- 4715-330 Braga
- Portugal
| | - Ling-dong Sun
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- Peking University
- Beijing 100871
- China
| | - Chun-hua Yan
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- Peking University
- Beijing 100871
- China
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15
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Wilma K, Issac A, Chen Z, Würthner F, Hildner R, Köhler J. Tracing Single Electrons in a Disordered Polymer Film at Room Temperature. J Phys Chem Lett 2016; 7:1478-1483. [PMID: 27035727 DOI: 10.1021/acs.jpclett.6b00446] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The transport of charges lies at the heart of essentially all modern (opto-) electronic devices. Although inorganic semiconductors built the basis for current technologies, organic materials have become increasingly important in recent years. However, organic matter is often highly disordered, which directly impacts the charge carrier dynamics. To understand and optimize device performance, detailed knowledge of the transport mechanisms of charge carriers in disordered matter is therefore of crucial importance. Here we report on the observation of the motion of single electrons within a disordered polymer film at room temperature, using single organic chromophores as probe molecules. The migration of a single electron gives rise to a varying electric field in its vicinity, which is registered via a shift of the emission spectra (Stark shift) of a chromophore. The spectral shifts allow us to determine the electron mobility and reveal for each nanoenvironment a distinct number of different possible electron-transfer pathways within the rugged energy landscape of the disordered polymer matrix.
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Affiliation(s)
- Kevin Wilma
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95440 Bayreuth, Germany
| | - Abey Issac
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95440 Bayreuth, Germany
| | - Zhijian Chen
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Frank Würthner
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Richard Hildner
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95440 Bayreuth, Germany
| | - Jürgen Köhler
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95440 Bayreuth, Germany
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16
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Schörner M, Beyer SR, Southall J, Cogdell RJ, Köhler J. Conformational Memory of a Protein Revealed by Single-Molecule Spectroscopy. J Phys Chem B 2015; 119:13964-70. [PMID: 26420643 DOI: 10.1021/acs.jpcb.5b07494] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Proteins are supramolecular machines that carry out a wide range of different functions, many of which require flexibility. Up until now spontaneous conformational fluctuations of proteins have always been assumed to reflect a stochastic random process. However, if changing between different conformational states was random, then it would be difficult to understand how conformational control of protein function could have evolved. Here we demonstrate that a single protein can show conformational memory. This is exactly the process that can facilitate the evolution of control of switching between two conformational states that can then be used to regulate protein function.
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Affiliation(s)
- Mario Schörner
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95447 Bayreuth, Germany
| | - Sebastian Reinhardt Beyer
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95447 Bayreuth, Germany
| | - June Southall
- Institute of Molecular, Cell & Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow , Glasgow G12 8QQ, United Kingdom
| | - Richard J Cogdell
- Institute of Molecular, Cell & Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow , Glasgow G12 8QQ, United Kingdom
| | - Jürgen Köhler
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95447 Bayreuth, Germany
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17
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Schörner M, Beyer SR, Southall J, Cogdell RJ, Köhler J. Multi-Level, Multi Time-Scale Fluorescence Intermittency of Photosynthetic LH2 Complexes: A Precursor of Non-Photochemical Quenching? J Phys Chem B 2015; 119:13958-63. [PMID: 26419118 DOI: 10.1021/acs.jpcb.5b06979] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The light harvesting complex LH2 is a chromoprotein that is an ideal system for studying protein dynamics via the spectral fluctuations of the emission of its intrinsic chromophores. We have immobilized these complexes in a polymer film and studied the fluctuations of the fluorescence intensity from individual complexes over 9 orders of magnitude in time. Combining time-tagged detection of single photons with a change-point analysis has allowed the unambigeous identification of the various intensity levels due to the huge statistical basis of the data set. We propose that the observed intensity level fluctuations reflect conformational changes of the protein backbone that might be a precursor of the mechanism from which nonphotochemical quenching of higher plants has evolved.
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Affiliation(s)
- Mario Schörner
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95447 Bayreuth, Germany
| | - Sebastian Reinhardt Beyer
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95447 Bayreuth, Germany
| | - June Southall
- Institute of Molecular, Cell & Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow , Glasgow G12 8QQ, United Kingdom
| | - Richard J Cogdell
- Institute of Molecular, Cell & Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow , Glasgow G12 8QQ, United Kingdom
| | - Jürgen Köhler
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95447 Bayreuth, Germany
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18
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Piwoński H, Sokołowski A, Waluk J. In Search for the Best Environment for Single Molecule Studies: Photostability of Single Terrylenediimide Molecules in Various Polymer Matrices. J Phys Chem Lett 2015; 6:2477-2482. [PMID: 26266722 DOI: 10.1021/acs.jpclett.5b01060] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Photobleaching is the main limiting factor in single molecule studies by optical techniques. We investigated the dependence of photostability of terrylene diimide (TDI) derivative on its environment using confocal fluorescence microscopy. Seven different polymers were tested. Depending on the matrix, photobleaching quantum yields vary by 2 orders of magnitude. Their values correlate with parameters characterizing oxygen mobility in polymers: diffusion coefficient and permeability. Poly(vinyl chloride) (PVC) and poly(methyl methacrylate) (PMMA) exhibit the lowest photodestruction quantum yields. Additional enhancement of photostability can be achieved by aging of PVC or by flushing the sample with nitrogen, which confirms the involvement of oxygen in photodestruction. Different character of the time traces of the intensity of emission from single TDI molecules is observed for different polymer matrices, ranging from intense blinking in the least stable polycarbonate, to practically no blinking in the most stable PVC. These results suggest a photodegradation mechanism involving self-sensitized photooxidation in oxygen complexes of TDI.
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Affiliation(s)
- Hubert Piwoński
- †Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland
| | - Adam Sokołowski
- †Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland
| | - Jacek Waluk
- †Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland
- ‡Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
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19
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New tools for elucidating the environmental origins of single molecule photoluminescence intermittency. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Malacarne LC, Savi EL, Baesso ML, Lenzi EK, Astrath NGC. Role of photophysics processes in thermal lens spectroscopy of fluids: a theoretical study. J Phys Chem A 2014; 118:5983-8. [PMID: 25017719 DOI: 10.1021/jp505255a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Photophysics processes are ubiquitous in nature and difficult to be quantitatively characterized by conventional spectroscopy. Alternatively, pump-probe methods have been widely applied to study these complex processes. In this context, the thermal lens technique is a precise spectroscopic tool for material characterization and presents a wide range of applications in chemical analysis. Here, we present an all numerical approach to analyze the dynamics of photophysics processes and to identify the role of individual contributions of photoreaction and mass diffusion in the thermal lens experiments. The results are essential for a proper understanding of the dominant physical mechanisms in laser-induced photodegradation, which allow precise data analysis of the effects in photosensitive fluids.
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Affiliation(s)
- L C Malacarne
- Departamento de Física, Universidade Estadual de Maringá , Maringá, Paraná 87020-900, Brazil
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21
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Issac A, Hildner R, Hippius C, Würthner F, Köhler J. Stepwise decrease of fluorescence versus sequential photobleaching in a single multichromophoric system. ACS NANO 2014; 8:1708-1717. [PMID: 24444041 DOI: 10.1021/nn4060946] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
For individual molecules from the newly synthesized calix[4]arene tethered perylene bisimide (PBI) trimer, we studied the emitted fluorescence intensity as a function of time. Owing to the zigzag arrangement of PBI dyes in these trimers, the polarization state of the emission provides directly information about the emitting subunit within the trimer. Interestingly, we observed emission from all neutral subunits within a trimer rather than exclusively from the subunit with the lowest site energy. This can be understood in terms of thermally activated uphill energy transfer that repopulates the higher energetic chromophores. Together with the simultaneously recorded polarization-resolved emission spectra, this reveals that the emission from a multichromophoric system is governed by a complex interplay between the temporal variations of the photophysical parameters of the subunits, bidirectional hopping processes within the trimer, and unavoidable photobleaching. Moreover, it is demonstrated that the typically observed stepwise decrease of the signal from a multichromophoric system does not necessarily reflect sequential bleaching of the individual chromophores within the macromolecule.
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Affiliation(s)
- Abey Issac
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95440 Bayreuth, Germany
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22
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Kaufman LJ. Heterogeneity in Single-Molecule Observables in the Study of Supercooled Liquids. Annu Rev Phys Chem 2013; 64:177-200. [DOI: 10.1146/annurev-physchem-040412-110033] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Bulk approaches to studying heterogeneous systems obscure important details, as they report average behavior rather than the distribution of behaviors in such environments. Small-molecule and polymeric supercooled liquids, which display heterogeneity in their dynamics without an underlying structural heterogeneity that sets those dynamics, are important constituents of this category of condensed matter systems. A variety of approaches have been devised to unravel ensemble averaging in supercooled liquids. This review focuses on the ultimate subensemble approach, single-molecule measurements, as they have been applied to the study of supercooled liquids. We detail how three key experimental observables (single-molecule probe rotation, translation, and fluorescence lifetime) have been employed to provide detail on dynamic heterogeneity in supercooled liquids. Special attention is given to the potential for, but also the challenges in, discriminating spatial and temporal heterogeneity and detailing the length scales and timescales of heterogeneity in these systems.
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Affiliation(s)
- Laura J. Kaufman
- Department of Chemistry, Columbia University, New York, NY 10027
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23
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Qi G, Jiang L, Zhao Y, Yang Y, Li X. Efficient collection of excitation energy from a linear-shaped weakly interacted perylenetetracarboxylic diimides array. Phys Chem Chem Phys 2013; 15:17342-53. [DOI: 10.1039/c3cp52941j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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24
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Yagai S, Usui M, Seki T, Murayama H, Kikkawa Y, Uemura S, Karatsu T, Kitamura A, Asano A, Seki S. Supramolecularly Engineered Perylene Bisimide Assemblies Exhibiting Thermal Transition from Columnar to Multilamellar Structures. J Am Chem Soc 2012; 134:7983-94. [DOI: 10.1021/ja302574b] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Shiki Yagai
- Department of Applied Chemistry & Biochemistry, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
- CREST, Japan Science and Technology Agency (JST), 1-33 Yayoi-cho, Inage-ku,
Chiba 263-8522, Japan
| | - Mari Usui
- Department of Applied Chemistry & Biochemistry, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Tomohiro Seki
- Department of Applied Chemistry & Biochemistry, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Haruno Murayama
- Office
of Society-Academia Collaboration
for Innovation, Kyoto University, Yoshida-Honmachi,
Sakyo-ku, Kyoto 606-8501, Japan
| | - Yoshihiro Kikkawa
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562, Japan
| | - Shinobu Uemura
- Department of Applied Chemistry & Biochemistry, Graduate School of Science and Technology, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan
| | - Takashi Karatsu
- Department of Applied Chemistry & Biochemistry, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Akihide Kitamura
- Department of Applied Chemistry & Biochemistry, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Atsushi Asano
- Department of Applied Chemistry,
Graduate
School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shu Seki
- Department of Applied Chemistry,
Graduate
School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
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25
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Ha T, Tinnefeld P. Photophysics of fluorescent probes for single-molecule biophysics and super-resolution imaging. Annu Rev Phys Chem 2012; 63:595-617. [PMID: 22404588 PMCID: PMC3736144 DOI: 10.1146/annurev-physchem-032210-103340] [Citation(s) in RCA: 451] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Single-molecule fluorescence spectroscopy and super-resolution microscopy are important elements of the ongoing technical revolution to reveal biochemical and cellular processes in unprecedented clarity and precision. Demands placed on the photophysical properties of the fluorophores are stringent and drive the choice of appropriate probes. Such fluorophores are not simple light bulbs of a certain color and brightness but instead have their own "personalities" regarding spectroscopic parameters, redox properties, size, water solubility, photostability, and several other factors. Here, we review the photophysics of fluorescent probes, both organic fluorophores and fluorescent proteins, used in applications such as particle tracking, single-molecule FRET, stoichiometry determination, and super-resolution imaging. Of particular interest is the thiol-induced blinking of Cy5, a curse for single-molecule biophysical studies that was later overcome using Trolox through a reducing/oxidizing system but a boon for super-resolution imaging owing to the controllable photoswitching. Understanding photophysics is critical in the design and interpretation of single-molecule experiments.
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Affiliation(s)
- Taekjip Ha
- Department of Physics, University of Illinois at Urbana-Champaign, 61801, USA.
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26
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Fluorescence behavior of individual charge-transfer complexes revealed by single-molecule fluorescence spectroscopy: Influence of the host polymer matrix. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2011.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Issac A, Hildner R, Ernst D, Hippius C, Würthner F, Köhler J. Single molecule studies of calix[4]arene-linked perylene bisimide dimers: relationship between blinking, lifetime and/or spectral fluctuations. Phys Chem Chem Phys 2012; 14:10789-98. [DOI: 10.1039/c2cp41250k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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28
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Mitsui M, Kawano Y, Takahashi R, Fukui H. Photophysics and photostability of 9,10-bis(phenylethynyl)anthracene revealed by single-molecule spectroscopy. RSC Adv 2012. [DOI: 10.1039/c2ra21100a] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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29
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Annibale P, Vanni S, Scarselli M, Rothlisberger U, Radenovic A. Quantitative photo activated localization microscopy: unraveling the effects of photoblinking. PLoS One 2011; 6:e22678. [PMID: 21818365 PMCID: PMC3144238 DOI: 10.1371/journal.pone.0022678] [Citation(s) in RCA: 195] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Accepted: 06/30/2011] [Indexed: 01/06/2023] Open
Abstract
In this work we discuss how to use photophysical information for improved quantitative measurements using Photo Activated Localization Microscopy (PALM) imaging. We introduce a method that reliably estimates the number of photoblinking molecules present in a biological sample and gives a robust way to quantify proteins at the single-cell level from PALM images. We apply this method to determine the amount of β2 adrenergic receptor, a prototypical G Protein Coupled Receptor, expressed on the plasma membrane of HeLa cells.
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Affiliation(s)
- Paolo Annibale
- Laboratory of Nanoscale Biology, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Stefano Vanni
- Laboratory of Computational Chemistry and Biochemistry, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Marco Scarselli
- Laboratory of Nanoscale Biology, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Ursula Rothlisberger
- Laboratory of Computational Chemistry and Biochemistry, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Aleksandra Radenovic
- Laboratory of Nanoscale Biology, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- * E-mail:
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30
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Haase M, Hübner CG, Nolde F, Müllen K, Basché T. Photoblinking and photobleaching of rylene diimide dyes. Phys Chem Chem Phys 2011; 13:1776-85. [DOI: 10.1039/c0cp01814g] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Riley EA, Bingham C, Bott ED, Kahr B, Reid PJ. Two mechanisms for fluorescence intermittency of single violamine R molecules. Phys Chem Chem Phys 2011; 13:1879-87. [DOI: 10.1039/c0cp01716g] [Citation(s) in RCA: 16] [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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32
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Photounbinding of calmodulin from a family of CaM binding peptides. PLoS One 2010; 5:e14050. [PMID: 21124984 PMCID: PMC2987815 DOI: 10.1371/journal.pone.0014050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Accepted: 09/30/2010] [Indexed: 12/29/2022] Open
Abstract
Background Recent studies have shown that fluorescently labeled antibodies can be dissociated from their antigen by illumination with laser light. The mechanism responsible for the photounbinding effect, however, remains elusive. Here, we give important insights into the mechanism of photounbinding and show that the effect is not restricted to antibody/antigen binding. Methodology/Principal Findings We present studies of the photounbinding of labeled calmodulin (CaM) from a set of CaM-binding peptides with different affinities to CaM after one- and two-photon excitation. We found that the photounbinding effect becomes stronger with increasing binding affinity. Our observation that photounbinding can be influenced by using free radical scavengers, that it does not occur with either unlabeled protein or non-fluorescent quencher dyes, and that it becomes evident shortly after or with photobleaching suggest that photounbinding and photobleaching are closely linked. Conclusions/Significance The experimental results exclude surface effects, or heating by laser irradiation as potential causes of photounbinding. Our data suggest that free radicals formed through photobleaching may cause a conformational change of the CaM which lowers their binding affinity with the peptide or its respective binding partner.
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33
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Unterkofler S, Pflock T, Southall J, Cogdell RJ, Köhler J. Fluorescence Blinking of the RC–LH1 Complex from
Rhodopseudomonas palustris. Chemphyschem 2010; 12:711-6. [DOI: 10.1002/cphc.201000588] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 09/20/2010] [Indexed: 11/09/2022]
Affiliation(s)
- Sarah Unterkofler
- Experimental Physics IV
- Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth (Germany), Fax: (+49) 921 55 4002
- Current address: Max Planck Institute for the Science of Light, Division for Photonics and New Materials, Günther‐Scharowsky‐Straße 1/Bau 24, 91058 Erlangen (Germany)
| | - Tobias Pflock
- Experimental Physics IV
- Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth (Germany), Fax: (+49) 921 55 4002
| | - June Southall
- Department of Biochemistry & Molecular Biology, Faculty of Biomedical & Life Sciences, University of Glasgow, 126 University Place, Glasgow G12 8TA (UK)
| | - Richard J. Cogdell
- Department of Biochemistry & Molecular Biology, Faculty of Biomedical & Life Sciences, University of Glasgow, 126 University Place, Glasgow G12 8TA (UK)
| | - Jürgen Köhler
- Experimental Physics IV
- Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth (Germany), Fax: (+49) 921 55 4002
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Vogelsang J, Steinhauer C, Forthmann C, Stein IH, Person-Skegro B, Cordes T, Tinnefeld P. Make them Blink: Probes for Super-Resolution Microscopy. Chemphyschem 2010; 11:2475-90. [DOI: 10.1002/cphc.201000189] [Citation(s) in RCA: 169] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kasper R, Harke B, Forthmann C, Tinnefeld P, Hell SW, Sauer M. Single-molecule STED microscopy with photostable organic fluorophores. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:1379-1384. [PMID: 20521266 DOI: 10.1002/smll.201000203] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- Robert Kasper
- Applied Laser Physics and Laser Spectroscopy Bielefeld University Universitätsstr. 25, 33615 Bielefeld, Germany
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36
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Bott ED, Riley EA, Kahr B, Reid PJ. Unraveling the Dispersed Kinetics of Dichlorofluorescein in Potassium Hydrogen Phthalate Crystals. J Phys Chem A 2010; 114:7331-7. [DOI: 10.1021/jp102194u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Eric D. Bott
- Department of Chemistry, University of Washington, Seattle, Washington 98195, and Department of Chemistry, New York University, 100 Washington Square East, Room 1001, New York, New York 10003
| | - Erin A. Riley
- Department of Chemistry, University of Washington, Seattle, Washington 98195, and Department of Chemistry, New York University, 100 Washington Square East, Room 1001, New York, New York 10003
| | - Bart Kahr
- Department of Chemistry, University of Washington, Seattle, Washington 98195, and Department of Chemistry, New York University, 100 Washington Square East, Room 1001, New York, New York 10003
| | - Philip J. Reid
- Department of Chemistry, University of Washington, Seattle, Washington 98195, and Department of Chemistry, New York University, 100 Washington Square East, Room 1001, New York, New York 10003
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37
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Bradac C, Gaebel T, Naidoo N, Sellars MJ, Twamley J, Brown LJ, Barnard AS, Plakhotnik T, Zvyagin AV, Rabeau JR. Observation and control of blinking nitrogen-vacancy centres in discrete nanodiamonds. NATURE NANOTECHNOLOGY 2010; 5:345-9. [PMID: 20383128 DOI: 10.1038/nnano.2010.56] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Accepted: 03/01/2010] [Indexed: 05/22/2023]
Abstract
Nitrogen-vacancy colour centres in diamond can undergo strong, spin-sensitive optical transitions under ambient conditions, which makes them attractive for applications in quantum optics, nanoscale magnetometry and biolabelling. Although nitrogen-vacancy centres have been observed in aggregated detonation nanodiamonds and milled nanodiamonds, they have not been observed in very small isolated nanodiamonds. Here, we report the first direct observation of nitrogen-vacancy centres in discrete 5-nm nanodiamonds at room temperature, including evidence for intermittency in the luminescence (blinking) from the nanodiamonds. We also show that it is possible to control this blinking by modifying the surface of the nanodiamonds.
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Affiliation(s)
- C Bradac
- Centre for Quantum Science and Technology, Department of Physics, Macquarie University, Sydney, New South Wales 2109, Australia
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38
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Kulzer F, Xia T, Orrit M. Einzelmoleküle als optische Nanosonden für weiche und komplexe Materie. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200904858] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Kulzer F, Xia T, Orrit M. Single Molecules as Optical Nanoprobes for Soft and Complex Matter. Angew Chem Int Ed Engl 2010; 49:854-66. [PMID: 20052698 DOI: 10.1002/anie.200904858] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Florian Kulzer
- ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain
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40
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Tachikawa T, Majima T. Single-molecule, single-particle fluorescence imaging of TiO2-based photocatalytic reactions. Chem Soc Rev 2010; 39:4802-19. [DOI: 10.1039/b919698f] [Citation(s) in RCA: 144] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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41
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Adam V, Carpentier P, Violot S, Lelimousin M, Darnault C, Nienhaus GU, Bourgeois D. Structural Basis of X-ray-Induced Transient Photobleaching in a Photoactivatable Green Fluorescent Protein. J Am Chem Soc 2009; 131:18063-5. [DOI: 10.1021/ja907296v] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Virgile Adam
- European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, 41 rue Jules Horowitz, 38027 Grenoble, France, Laboratoire de Physiologie Cellulaire Végétale, Institut de Recherches en Technologie et Sciences pour le Vivant, CEA, CNRS, INRA, Université Joseph Fourier, 17 rue des Martyrs, F-38054 Grenoble, France, Institute of Applied Physics and Center for Functional
| | - Philippe Carpentier
- European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, 41 rue Jules Horowitz, 38027 Grenoble, France, Laboratoire de Physiologie Cellulaire Végétale, Institut de Recherches en Technologie et Sciences pour le Vivant, CEA, CNRS, INRA, Université Joseph Fourier, 17 rue des Martyrs, F-38054 Grenoble, France, Institute of Applied Physics and Center for Functional
| | - Sebastien Violot
- European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, 41 rue Jules Horowitz, 38027 Grenoble, France, Laboratoire de Physiologie Cellulaire Végétale, Institut de Recherches en Technologie et Sciences pour le Vivant, CEA, CNRS, INRA, Université Joseph Fourier, 17 rue des Martyrs, F-38054 Grenoble, France, Institute of Applied Physics and Center for Functional
| | - Mickaël Lelimousin
- European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, 41 rue Jules Horowitz, 38027 Grenoble, France, Laboratoire de Physiologie Cellulaire Végétale, Institut de Recherches en Technologie et Sciences pour le Vivant, CEA, CNRS, INRA, Université Joseph Fourier, 17 rue des Martyrs, F-38054 Grenoble, France, Institute of Applied Physics and Center for Functional
| | - Claudine Darnault
- European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, 41 rue Jules Horowitz, 38027 Grenoble, France, Laboratoire de Physiologie Cellulaire Végétale, Institut de Recherches en Technologie et Sciences pour le Vivant, CEA, CNRS, INRA, Université Joseph Fourier, 17 rue des Martyrs, F-38054 Grenoble, France, Institute of Applied Physics and Center for Functional
| | - G. Ulrich Nienhaus
- European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, 41 rue Jules Horowitz, 38027 Grenoble, France, Laboratoire de Physiologie Cellulaire Végétale, Institut de Recherches en Technologie et Sciences pour le Vivant, CEA, CNRS, INRA, Université Joseph Fourier, 17 rue des Martyrs, F-38054 Grenoble, France, Institute of Applied Physics and Center for Functional
| | - Dominique Bourgeois
- European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, 41 rue Jules Horowitz, 38027 Grenoble, France, Laboratoire de Physiologie Cellulaire Végétale, Institut de Recherches en Technologie et Sciences pour le Vivant, CEA, CNRS, INRA, Université Joseph Fourier, 17 rue des Martyrs, F-38054 Grenoble, France, Institute of Applied Physics and Center for Functional
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Ernst D, Hildner R, Hippius C, Würthner F, Köhler J. Photoblinking dynamics in single calix[4]arene-linked perylene bisimide dimers. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.09.096] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Sanda F. Strong field line shapes and photon statistics from a single molecule under anomalous noise. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 80:041132. [PMID: 19905298 DOI: 10.1103/physreve.80.041132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2009] [Indexed: 05/28/2023]
Abstract
We revisit the line-shape theory of a single molecule with anomalous stochastic spectral diffusion. Waiting time profiles for bath induced spectral jumps in the ground and excited states become different when a molecule, probed by continuous-wave laser field, reaches the steady state. This effect is studied for the stationary dichotomic continuous-time-random-walk spectral diffusion of a single two-level chromophore with power-law distributions of waiting times. Correlated waiting time distributions, line shapes, two-point fluorescence correlation function, and Mandel Q parameter are calculated for arbitrary magnitude of laser field. We extended previous weak field results and examined the breakdown of the central limit theorem in photon statistics, indicated by asymptotic power-law growth of Mandel Q parameter. Frequency profile of the Mandel Q parameter identifies the peaks of spectrum, which are related to anomalous spectral diffusion dynamics.
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Affiliation(s)
- Frantisek Sanda
- Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, Prague 121 16, Czech Republic
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45
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Lee SF, Osborne MA. Brightening, Blinking, Bluing and Bleaching in the Life of a Quantum Dot: Friend or Foe? Chemphyschem 2009; 10:2174-91. [DOI: 10.1002/cphc.200900200] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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46
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Carpentier P, Violot S, Blanchoin L, Bourgeois D. Structural basis for the phototoxicity of the fluorescent protein KillerRed. FEBS Lett 2009; 583:2839-42. [PMID: 19646983 DOI: 10.1016/j.febslet.2009.07.041] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2009] [Accepted: 07/23/2009] [Indexed: 11/25/2022]
Abstract
The red fluorescent protein KillerRed, engineered from the hydrozoan chromoprotein anm2CP, has been reported to induce strong cytotoxicity through the chromophore assisted light inactivation (CALI) effect. Here, we present the X-ray structures of KillerRed in its native and bleached states. A long water-filled channel is revealed, connecting the methylene bridge of the chromophore to the solvent. This channel facilitates the transit of oxygen and of reactive oxygen species (ROS) formed by reaction with the excited chromophore. The functional roles of key mutations used to produce KillerRed are discussed, strong chromophore distortions in the bleached state are revealed, and mechanisms for ROS production and self protection are proposed. The presence of a partially mature, photo-resistant, green-emitting state is characterized, which accounts for enhanced CALI by "pre-bleached" KillerRed.
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Affiliation(s)
- Philippe Carpentier
- Laboratoire de Cristallographie et Cristallogenèse des Protéines, IBS, Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, Université Joseph Fourier, Grenoble, France.
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47
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Richards CI, Hsiang JC, Senapati D, Patel S, Yu J, Vosch T, Dickson RM. Optically modulated fluorophores for selective fluorescence signal recovery. J Am Chem Soc 2009; 131:4619-21. [PMID: 19284790 PMCID: PMC2734916 DOI: 10.1021/ja809785s] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fluorescence imaging in biological sciences is hindered by significant depth-dependent signal attenuation and highly fluorescent backgrounds. We have developed optically modulated near-IR-emitting few-atom Ag nanodots that are selectively and dynamically photobrightened upon simultaneous excitation with a secondary laser, enabling high-sensitivity image extraction to reveal only the demodulated fluorophores. Image demodulation is demonstrated in high-background environments to extract weak signals from completely obscuring background emission.
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Affiliation(s)
- Chris I Richards
- School of Chemistry and Biochemistry and Petit Institute for Biosciences and Bioengineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
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48
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Carbonaro CM, Meinardi F, Ricci PC, Salis M, Anedda A. Light Assisted Dimer to Monomer Transformation in Heavily Doped Rhodamine 6G−Porous Silica Hybrids. J Phys Chem B 2009; 113:5111-6. [DOI: 10.1021/jp810835j] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carlo M. Carbonaro
- Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, S.P. no. 8, I-09042 Monserrato, Cagliari, Italy, INFM and Dipartimento di Scienza dei Materiali, Università Milano-Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and CGS, Centro Grandi Strumenti, Università di Cagliari, S.P. no. 8, km 0.700, 09042, Monserrato, Italy
| | - Franco Meinardi
- Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, S.P. no. 8, I-09042 Monserrato, Cagliari, Italy, INFM and Dipartimento di Scienza dei Materiali, Università Milano-Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and CGS, Centro Grandi Strumenti, Università di Cagliari, S.P. no. 8, km 0.700, 09042, Monserrato, Italy
| | - Pier C. Ricci
- Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, S.P. no. 8, I-09042 Monserrato, Cagliari, Italy, INFM and Dipartimento di Scienza dei Materiali, Università Milano-Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and CGS, Centro Grandi Strumenti, Università di Cagliari, S.P. no. 8, km 0.700, 09042, Monserrato, Italy
| | - Marcello Salis
- Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, S.P. no. 8, I-09042 Monserrato, Cagliari, Italy, INFM and Dipartimento di Scienza dei Materiali, Università Milano-Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and CGS, Centro Grandi Strumenti, Università di Cagliari, S.P. no. 8, km 0.700, 09042, Monserrato, Italy
| | - Alberto Anedda
- Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, S.P. no. 8, I-09042 Monserrato, Cagliari, Italy, INFM and Dipartimento di Scienza dei Materiali, Università Milano-Bicocca, Via Cozzi 53, I-20125 Milano, Italy, and CGS, Centro Grandi Strumenti, Università di Cagliari, S.P. no. 8, km 0.700, 09042, Monserrato, Italy
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49
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Vogelsang J, Cordes T, Tinnefeld P. Single-molecule photophysics of oxazines on DNA and its application in a FRET switch. Photochem Photobiol Sci 2009; 8:486-96. [PMID: 19337662 DOI: 10.1039/b822318c] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role and interplay of triplet states and radical ion states in single-molecule fluorescence spectroscopy has recently been elaborated providing us with new insights into the photophysics and photobleaching pathways of fluorescent dyes. Adjustment of fluorophore redox properties in combination with specific redox properties of the environment, i.e. addition of reducing and oxidizing agents, allows control of the emission properties: it has become possible to suppress blinking and to also induce blinking in single-molecule fluorescence transient by selectively opening and closing specific excited state pathways. Induced blinking is, for example, of interest for super-resolution fluorescence microscopy based on the subsequent localization of single fluorophores. For oxazines this control even allowed the separation of the influence of reducing and oxidizing agents, enabling switching the fluorescence of single fluorophores. Here, we study the factors that contribute to the kinetics of the photophysical pathways more closely with a focus on the photophysics of the oxazine ATTO655 labeled to DNA. Our data show that the oxazine ATTO655 interacts with DNA, shielding it efficiently from reagents in solution. Besides redox reactions, the pH also influences the blinking kinetics and especially the off-times. Moreover, we present the extension of ATTO655 as a single-molecule redox sensor to a ratiometric fluorescence-resonance-energy-transfer based sensor. Therefore, we designed FRET probes that showed the highest possible contrast of FRET changes and demonstrate reversible FRET-switching of Cy3B-ATTO655 DNA constructs.
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Affiliation(s)
- Jan Vogelsang
- Angewandte Physik-Biophysik and Center for NanoScience CeNS, Ludwig-Maximilians-Universität München, Amalienstr. 54, 80799, München, Germany.
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50
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Lukovic M, Grigolini P. Power spectra for both interrupted and perennial aging processes. J Chem Phys 2009; 129:184102. [PMID: 19045381 DOI: 10.1063/1.3006051] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the power spectrum of a random telegraphic noise with the distribution density of waiting times tau given by psi(tau) proportional to 1tau(mu), with mu approximately 2. The condition mu<2 violates the ergodic hypothesis, and in this case the adoption of Wiener-Khintchine (WK) theorem for the spectrum evaluation requires some caution. We study this problem theoretically and numerically and we prove that the power spectrum obeys the prescription S(f)=Kf(eta), with eta=3-mu, namely, the 1f noise lives at border between the ergodic mu>2 and nonergodic mu<2 condition. We study sequences with the finite length L. In the case mu<2 the adoption of WK theorem is made legitimate by two different kinds of truncation effects: the physical and observation-induced effect. In the former case psi(tau) is truncated at tau approximately T(max) and L>>T(max) ensures the condition of interrupted aging. In this case, we find that K is a number independent of L. The latter case, L<<T(max), is more challenging. It was already solved by Margolin and Barkai, who used time asymptotic arguments based on the ergodicity breakdown and obtained K proportional to 1L(2-mu), proving that the out-of-equilibrium nature of the condition mu<2 is signaled by the decrease of K with the increase of L. We use a generalized version of the Onsager principle that leads us to the same conclusion from a somewhat more extended view valid also for the transient out-of-equilibrium case of mu>2. We do not limit our treatment to the time asymptotic case, thereby producing a prediction that accounts for the transition from the 1f(eta) to the 1f(2) regime, recently observed in an experiment on blinking quantum dots. Our theoretical approach allows us to discuss some other recent experiments on molecular intermittent fluorescence and affords indications that should help to assess whether the spectrum is determined by the L<<T(max) or by the L>>T(max) condition.
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Affiliation(s)
- Mirko Lukovic
- Dipartimento di Fisica E. Fermi-Universita di Pisa and INFM, Largo Pontecorvo 3, 56127 Pisa, Italy
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