1
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Dinesan H, Kumar SS. Laser-Induced Fluorescence (LIF) Spectroscopy of Trapped Molecular Ions in the Gas Phase. APPLIED SPECTROSCOPY 2022; 76:1393-1411. [PMID: 36263923 DOI: 10.1177/00037028221120830] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
This review focuses on the laser-induced fluorescence (LIF) spectroscopy of trapped gas-phase molecular ions, a developing field of research. Following a brief description of the theory and experimental approaches employed in general for fluorescence spectroscopy, the review summarizes the current state-of-the-art intrinsic fluorescence measurement techniques employed for gas-phase ions. Whereas the LIF spectroscopy of condensed matter systems is a well-developed area of research, the instrumentation used for such studies is not directly applicable to gas-phase ions. However, some measurement schemes employed in condensed-phase experiments could be highly beneficial for gas-phase investigations. We have included a brief discussion on some of these techniques as well. Quadrupole ion traps are commonly used for spatial confinement of ions in the ion-trap-based LIF. One of the main challenges involved in such experiments is the poor signal-to-noise ratio (SNR) arising due to weak gas-phase fluorescence emission, high background noise, and small solid angle for the fluorescence collection optics. The experimental approaches based on the integrated high-finesse optical cavities employed for the condensed-phase measurements provide a better (typically an order of magnitude more) SNR in the detected fluorescence than the single-pass detection schemes. Another key to improving the SNR is to exploit the maximum solid angle of light collection by choosing high numerical aperture (NA) collection optics. A combination of these two approaches integrated with ion traps could transmogrify this field, allowing one to study even weak fluorescence emission from gas-phase molecular ions. The review concludes by discussing the scope of the advances in the LIF instrumentation for detailed spectral characterization of fluorophores of weak gas-phase fluorescence emission, considering fluorescein as one example.
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Affiliation(s)
- Hemanth Dinesan
- Department of Physics and Center for Atomic, Molecular, and Optical Sciences and Technologies (CAMOST), 443874Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, India
| | - S Sunil Kumar
- Department of Physics and Center for Atomic, Molecular, and Optical Sciences and Technologies (CAMOST), 443874Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, India
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2
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Britton BM, London JA, Martin-Lopez J, Jones ND, Liu J, Lee JB, Fishel R. Exploiting the distinctive properties of the bacterial and human MutS homolog sliding clamps on mismatched DNA. J Biol Chem 2022; 298:102505. [PMID: 36126773 PMCID: PMC9597889 DOI: 10.1016/j.jbc.2022.102505] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 09/13/2022] [Accepted: 09/15/2022] [Indexed: 12/30/2022] Open
Abstract
MutS homologs (MSHs) are highly conserved core components of DNA mismatch repair. Mismatch recognition provokes ATP-binding by MSH proteins that drives a conformational transition from a short-lived lesion-searching clamp to an extremely stable sliding clamp on the DNA. Here, we have expanded on previous bulk biochemical studies to examine the stability, lifetime, and kinetics of bacterial and human MSH sliding clamps on mismatched DNA using surface plasmon resonance and single-molecule analysis of fluorescently labeled proteins. We found that ATP-bound MSH complexes bound to blocked-end or very long mismatched DNAs were extremely stable over a range of ionic conditions. These observations underpinned the development of a high-throughput Förster resonance energy transfer system that specifically detects the formation of MSH sliding clamps on mismatched DNA. The Förster resonance energy transfer system is capable of distinguishing between HsMSH2-HsMSH3 and HsMSH2-HsMSH6 and appears suitable for chemical inhibitor screens. Taken together, our results provide additional insight into MSH sliding clamps as well as methods to distinguish their functions in mismatch repair.
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Affiliation(s)
- Brooke M Britton
- Department of Cancer Biology and Genetics, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - James A London
- Department of Cancer Biology and Genetics, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Juana Martin-Lopez
- Department of Cancer Biology and Genetics, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Nathan D Jones
- Department of Cancer Biology and Genetics, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Jiaquan Liu
- Department of Cancer Biology and Genetics, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Jong-Bong Lee
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, Korea; Interdisciplinary Bioscience and Bioengineering, POSTECH, Pohang, Korea
| | - Richard Fishel
- Department of Cancer Biology and Genetics, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA.
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3
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Angulo G, Pasitsuparoad P. Recalling the effect of fluorescence anisotropy on the measurement of quantum yields. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 269:120751. [PMID: 34929628 DOI: 10.1016/j.saa.2021.120751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
We present a quantitative analysis of the deviations introduced by the anisotropy of the fluorescence on the measurement of the quantum yield of emission. Errors of up to 40% can be encountered depending on the characteristics of both sample and apparatus. Additionally, we have analyzed the effect of anisotropy on the study of fluorescence quenching in Stern-Volmer experiments, and on the reconstruction of time-resolved emission spectra. We conclude that the use of polarizers is recommended provided they are well characterized.
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Affiliation(s)
- Gonzalo Angulo
- Institute of Physical Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Pakorn Pasitsuparoad
- Faculty of Technology and Environment, Prince of Songkla University, Phuket Campus, Kathu, Phuket 83120, Thailand
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4
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Shah JS, Buckmeier BG, Griffith W, Olafson PU, Perez de Leon AA, Renthal R. Odorant-binding protein from the stable fly (Stomoxys calcitrans) has a high-histidine N-terminal extension that binds transition metals. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2022; 141:103707. [PMID: 34979251 DOI: 10.1016/j.ibmb.2021.103707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 12/19/2021] [Accepted: 12/26/2021] [Indexed: 06/14/2023]
Abstract
The role of odorant- and pheromone-binding proteins (OBPs) in olfactory function is not fully understood. We found an OBP sequence from the stable fly, Stomoxys calcitrans, ScalOBP60, that has a 25 amino acid N-terminal extension with a high content of histidine and acidic amino acids, suggesting a possible metal binding activity. A search of public databases revealed a large number of other fly OBPs with histidine-rich N-terminal extensions, as well as beetle, wasp and ant OBPs with histidine-rich C-terminal extensions. We recombinantly expressed ScalOBP60, as well as a truncated sequence which lacks the histidine-rich N-terminal region, tScalOBP60. Using fluorescence quenching and electrospray quadrupole time-of-flight mass spectrometry (ESI-QTOF), we detected two different types of metal-binding sites. Divalent copper, nickel and zinc bind to the N-terminal histidine-rich region, and divalent copper binds to an internal sequence position. Comparison of the ESI-QTOF spectra of ScalOBP60 and tScalOBP60 showed that the histidine-rich sequence is structurally disordered, but it becomes more ordered in the presence of divalent metal. When copper is bound to the internal site, binding of a hydrophobic ligand to ScalOBP60 is inhibited. The internal and N-terminal metal sites interact allosterically, possibly through a conformational equilibrium, suggesting a mechanism for metal regulation of ligand binding to ScalOBP60. Based on our studies of ScalOBP60, we propose several possible olfactory and non-olfactory functions for this OBP.
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Affiliation(s)
- Jaee Shailesh Shah
- Department of Biology, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | | | - Wendell Griffith
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Pia Untalan Olafson
- USDA-ARS, Knipling-Bushland U.S. Livestock Insects Research Lab, Kerrville, TX, 78028, USA
| | | | - Robert Renthal
- Department of Biology, University of Texas at San Antonio, San Antonio, TX, 78249, USA; Department of Neuroscience, Developmental and Regenerative Biology, University of Texas at San Antonio, San Antonio, TX, 78249, USA.
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5
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Fluorescence of carotenoids: Probing binding site interactions and conformational motion in carotenoproteins. Methods Enzymol 2022; 674:85-111. [DOI: 10.1016/bs.mie.2022.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Chumak A, Khodzhaeva R, Kharchenko O, Kotlyar V, Kolomoitsev O, Doroshenko A. Complexation of 1,3-dihetaryl-5-phenyl-2-pyrazoline Derivatives with Polyvalent Metal Ions: Quantum Chemical Modeling and Experimental Investigation. FRENCH-UKRAINIAN JOURNAL OF CHEMISTRY 2022. [DOI: 10.17721/fujcv10i1p155-174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
1,3,5-Triaryl-2-pyrazoline derivatives with a pyridine ring in position 1 and 2-benzimidazolyl or 2-benzothiazolyl bicycles in position 3 were synthesized. Spectral properties in solvents of similar polarity, i.e. aprotic acetonitrile and in protic methanol, were studied, complexation with cadmium and mercury ions in acetonitrile was elucidated as well. Quantum-chemical modeling with application of the elements of Bader's atoms-in-molecules (AIM) theory of the title molecules conformational structure and 1:1 stoichiometry complexes formed with polyvalent metals of various nature (Mg, Zn, Cd, Pb, Hg, Ba) was conducted. The principal possibility of “nitrogen-sulfur” switching of the metal ions binding sites for the benzothiazole derivative was revealed, and makes possible to classify this compound as “smart ligand”.
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7
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Gurchiek JK, Rose JB, Guberman-Pfeffer MJ, Tilluck RW, Ghosh S, Gascón JA, Beck WF. Fluorescence Anisotropy Detection of Barrier Crossing and Ultrafast Conformational Dynamics in the S 2 State of β-Carotene. J Phys Chem B 2020; 124:9029-9046. [PMID: 32955881 DOI: 10.1021/acs.jpcb.0c06961] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Carotenoids are usually only weakly fluorescent despite being very strong absorbers in the mid-visible region because their first two excited singlet states, S1 and S2, have very short lifetimes. To probe the structural mechanisms that promote the nonradiative decay of the S2 state to the S1 state, we have carried out a series of fluorescence lineshape and anisotropy measurements with a prototype carotenoid, β-carotene, in four aprotic solvents. The anisotropy values observed in the fluorescence emission bands originating from the S2 and S1 states reveal that the large internal rotations of the emission transition dipole moment, as much as 50° relative to that of the absorption transition dipole moment, are initiated during ultrafast evolution on the S2 state potential energy surface and persist upon nonradiative decay to the S1 state. Electronic structure calculations of the orientation of the transition dipole moment account for the anisotropy results in terms of torsional and pyramidal distortions near the center of the isoprenoid backbone. The excitation wavelength dependence of the fluorescence anisotropy indicates that these out-of-plane conformational motions are initiated by passage over a low-activation energy barrier from the Franck-Condon S2 structure. This conclusion is consistent with detection over the 80-200 K range of a broad, red-shifted fluorescence band from a dynamic intermediate evolving on a steep gradient of the S2 state potential energy surface after crossing the activation barrier. The temperature dependence of the oscillator strength and anisotropy indicate that nonadiabatic passage from S2 through a conical intersection seam to S1 is promoted by the out-of-plane motions of the isoprenoid backbone with strong hindrance by solvent friction.
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Affiliation(s)
- J K Gurchiek
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Justin B Rose
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Matthew J Guberman-Pfeffer
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06268-1712, United States
| | - Ryan W Tilluck
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Soumen Ghosh
- Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan, Lombardy 20133, Italy
| | - José A Gascón
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06268-1712, United States
| | - Warren F Beck
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
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8
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Absolute and Relative Methods for Fluorescence Quantum Yield Evaluation of Quantum Dots. Methods Mol Biol 2020. [PMID: 32246327 DOI: 10.1007/978-1-0716-0463-2_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Optical spectroscopy techniques are crucial for the evaluation and use of quantum dots (QDs) in life and materials science. In that context, the fluorescence quantum yield (Φf) is an essential parameter in the assessment of the luminescent features of QDs. The fluorescence quantum yield can be defined as the ratio of the number of emitted photons to the number of absorbed photons by a luminescent material. In this chapter, we describe absolute and relative methods to measure the fluorescence quantum yield of QDs in solution phase. The advantages and limitations of the techniques are reviewed.
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9
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4’-Methoxy-3-hydroxyflavone excited state intramolecular proton transfer reaction in alcoholic solutions: Intermolecular versus intramolecular hydrogen bonding effect. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111964] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Synthesis and characterization of new N-{4,6-bis[2-(het)arylvinyl]pyrimidin-2-yl}-substituted polycyclic aromatic imides. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2614-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Gienger J, Bär M, Neukammer J. Extinction spectra of suspensions of microspheres: determination of the spectral refractive index and particle size distribution with nanometer accuracy. APPLIED OPTICS 2018; 57:344-355. [PMID: 29328184 DOI: 10.1364/ao.57.000344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/11/2017] [Indexed: 06/07/2023]
Abstract
A method is presented to infer simultaneously the wavelength-dependent real refractive index (RI) of the material of microspheres and their size distribution from extinction measurements of particle suspensions. To derive the averaged spectral optical extinction cross section of the microspheres from such ensemble measurements, we determined the particle concentration by flow cytometry to an accuracy of typically 2% and adjusted the particle concentration to ensure that perturbations due to multiple scattering are negligible. For analysis of the extinction spectra, we employ Mie theory, a series-expansion representation of the refractive index and nonlinear numerical optimization. In contrast to other approaches, our method offers the advantage to simultaneously determine size, size distribution, and spectral refractive index of ensembles of microparticles including uncertainty estimation.
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12
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Iliashenko RY, Borodin OO, Wera M, Doroshenko AO. 2,5-bis[2-(2-phenyl-1,3-oxazol-5-yl)phenyl]-1,3,4-oxadiazole – new sterically hindered high Stokes shift fluorophore sensitive to media viscosity. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2014.10.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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5-[4-(N,N-Dimethylamino)Phenyl]-2-(4-Pyridyl)-1,3-Oxazole as a Fluorescent Probe for Monitoring Microheterogeneous Media. Chem Heterocycl Compd (N Y) 2014. [DOI: 10.1007/s10593-014-1486-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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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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15
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1,4-bis-(3-hydroxy-4-oxo-4H-chromen-2-yl)-benzene (bis-flavonol): synthesis, spectral properties and principle possibility of the excited state double proton transfer reaction. OPEN CHEM 2012. [DOI: 10.2478/s11532-011-0127-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractSynthesis and systematic investigation of the spectral-luminescent properties of “bis-flavonol” {1,4-bis-(3-hydroxy-4-oxo-4H-chromen-2-yl)-benzene} were performed. Hypothetical possibility for the double excited-state proton transfer reaction in bis-flavonol is discussed based on both quantum-chemical modeling and experimental data. Consecutive S1*-state transfer of the two protons of the title molecule is shown to be energetically unfavorable, however, still preserving a possibility for the concerted double proton transfer in the excited dienol form.
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16
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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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17
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Spectral-luminescent and solvatochromic properties of 2-(3′-coumarinyl)-5-(2′-(R-amino)-phenyl)-1,3,4-oxadiazoles. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2011.10.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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18
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New and efficient high Stokes shift fluorescent compounds: unsymmetrically substituted 1,2-bis-(5-phenyloxazol-2-yl)benzenes via microwave-assisted nucleophilic substitution of fluorine. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.07.100] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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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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20
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Chepeleva LV, Matsakov AY, Kondratyuk ZA, Yaremenko FG, Doroshenko AO. Pyrazolyc 3-hydroxychromones: Regulation of ESIPT reaction by the “flavonol-like” intramolecular hydrogen bonding to carbonyl group oxygen, which dominates over the “alternative” H-bond to heterocyclic nitrogen. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2009.11.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Grabolle M, Spieles M, Lesnyak V, Gaponik N, Eychmüller A, Resch-Genger U. Determination of the Fluorescence Quantum Yield of Quantum Dots: Suitable Procedures and Achievable Uncertainties. Anal Chem 2009. [DOI: 10.1021/ac900308v] [Citation(s) in RCA: 490] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Markus Grabolle
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany, and Physical Chemistry, TU Dresden, Bergstrasse 66b, 01062 Dresden, Germany
| | - Monika Spieles
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany, and Physical Chemistry, TU Dresden, Bergstrasse 66b, 01062 Dresden, Germany
| | - Vladimir Lesnyak
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany, and Physical Chemistry, TU Dresden, Bergstrasse 66b, 01062 Dresden, Germany
| | - Nikolai Gaponik
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany, and Physical Chemistry, TU Dresden, Bergstrasse 66b, 01062 Dresden, Germany
| | - Alexander Eychmüller
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany, and Physical Chemistry, TU Dresden, Bergstrasse 66b, 01062 Dresden, Germany
| | - Ute Resch-Genger
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany, and Physical Chemistry, TU Dresden, Bergstrasse 66b, 01062 Dresden, Germany
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22
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2-(benzimidazol-2-yl)-3-hydroxychromone derivatives: spectroscopic properties and a possibile alternative intramolecular proton phototransfer. OPEN CHEM 2008. [DOI: 10.2478/s11532-008-0039-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractThree 2-(benzimidazol-2-yl)-3-hydroxychromone derivatives were synthesized. Their spectroscopic and fluorescent properties, due to excited state intramolecular proton transfer (ESIPT) from OH to carbonyl, were studied. Theoretical possibility of an alternative intramolecular H-bonding and experimental evidence for such behavior are discussed.
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23
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Rurack K. Fluorescence Quantum Yields: Methods of Determination and Standards. STANDARDIZATION AND QUALITY ASSURANCE IN FLUORESCENCE MEASUREMENTS I 2008. [DOI: 10.1007/4243_2008_019] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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24
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DeRose PC, Early EA, Kramer GW. Qualification of a fluorescence spectrometer for measuring true fluorescence spectra. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2007; 78:033107. [PMID: 17411178 DOI: 10.1063/1.2715952] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
New analytical methods using fluorescence detection are becoming increasingly quantitative and require easy-to-use material standards for fluorometer qualification and method validation. NIST is responding to this need by developing and producing such standards. Reported here is the first step in this process, which is to qualify a research-grade fluorescence spectrometer for measuring true fluorescence spectra of reference material candidates. "True" spectra are defined here as those with fluorescence intensity, either relative or absolute as required, and wavelength both being reported with high accuracy and known precision, after wavelength has been calibrated and corrections for excitation intensity and detection system response have been applied. The uncertainties determined in relative and absolute intensity-corrected fluorescence spectra using both calibrated source (CS)- and calibrated detector (CD)-based methods were compared. The CS-based method gave uncertainties, typically about +/-5% for relative spectral correction, that were about half that of the CD-based method for determining both relative and absolute spectral correction factors. Absolute spectral correction factors can be determined using either method without knowing the optical geometry of the instrument. The absolute spectral correction factors were found to have much larger uncertainties than the corresponding relative correction factors with uncertainties for the CS-based method of +/-10% to +/-15% being typical and +/-20% or more not being uncommon, particularly for excitation and emission wavelengths below 400 nm. Uncertainties arising from detection system nonlinearity and instrument polarization ratios were also explored.
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Affiliation(s)
- Paul C DeRose
- National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899-8312, USA
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25
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Sen S, Gearheart LA, Rivers E, Liu H, Coleman RS, Murphy CJ, Berg MA. Role of Monovalent Counterions in the Ultrafast Dynamics of DNA. J Phys Chem B 2006; 110:13248-55. [PMID: 16805639 DOI: 10.1021/jp056327+] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This paper examines the contribution of counterion motion to the electric-field dynamics in the interior of DNA. The electric field is measured by a coumarin fluorophore that is synthetically incorporated into an oligonucleotide, where it replaces a native base pair. The DNA is a 17-base-pair oligomer with no A- or G-tracts. Time-resolved Stokes-shift measurements on the coumarin are made from 40 ps to 40 ns with each of the alkali ions and or one of several tetraalkylammonium ions as the DNA counterion. With the possible exception of rubidium, there are no indications of site-specific binding of the counterions. For sodium and other ions with a smaller hydrodynamic radius, the dynamics are identical and are fit to a power law. For larger ions, there is a progressive increase in the rate of shifting after 1 ns. This effect correlates with the hydrodynamic radius of the counterion. The lack of change in the spectral shape of the emission shows that neither the broadly distributed power-law relaxation nor the extra nanosecond dynamics are due to heterogeneity in the relaxation rates of different helices.
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Affiliation(s)
- Sobhan Sen
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
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Law KY. Application of fluorescence to elucidate the ground state electronic structure of boron, zinc and aluminum complexes of 3,5-di-tert-butylsalicylic acid. J Photochem Photobiol A Chem 1997. [DOI: 10.1016/s1010-6030(96)04615-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Takahashi K, Hase S, Komura T, Imanaga H, Ohno O. The Fluorescence Properties of (2-Nitro-5,10,15,20- tetraphenylporphyrinato)zinc. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1992. [DOI: 10.1246/bcsj.65.1475] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Methylenecycloproparenes: efficient fluorescence and lasing of dimethylaminophenyl derivatives. J Photochem Photobiol A Chem 1990. [DOI: 10.1016/1010-6030(90)87104-j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Takahashi K, Terashima T, Komura T, Imanaga H. The Fluorescence Quenching of Zinc Porphyrins with the ω-[4-(4-Pyridyl)pyridinio]alkyl Group. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1989. [DOI: 10.1246/bcsj.62.3069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Catherall CL, Palmer TF, Cundall RB. Determination of absolute chemiluminescence quantum yields for reactions of bis-(pentachlorophenyl) oxalate, hydrogen peroxide and fluorescent compounds. JOURNAL OF BIOLUMINESCENCE AND CHEMILUMINESCENCE 1989; 3:147-54. [PMID: 2782110 DOI: 10.1002/bio.1170030308] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Absolute chemiluminescence quantum yields (phi CL) for reactions of bis-(pentachlorophenyl) oxalate (PCPO), hydrogen peroxide (H2O2) and 9:10 diphenyl anthracene (DPA) have been determined. A fully corrected chemiluminescence monitoring spectrometer was calibrated for spectral sensitivity using the chemiluminescence of the bis-(pentachlorophenyl) oxalate system as a liquid light source, the total photon output of which had previously been determined by chemical actinometry. At high (PCPO)/(H2O2) ratios phi CL was found to be independent of PCPO and H2O2 concentrations.
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Affiliation(s)
- C L Catherall
- Department of Chemistry, University of Nottingham, University Park, UK
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31
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Absolute fluorescence quantum yields by relative fluorescence and photoacoustic measurements of low level luminescence quenching. J Photochem Photobiol A Chem 1987. [DOI: 10.1016/1010-6030(87)85004-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Nakashima N, Meech SR, Auty AR, Jones AC, Phillips D. Fluorescence properties of ergosterol. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/0047-2670(85)85025-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ohno O, Kaizu Y, Kobayashi H. Luminescence of some metalloporphins including the complexes of the IIIb metal group. J Chem Phys 1985. [DOI: 10.1063/1.448410] [Citation(s) in RCA: 142] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Acuña AU, González J, Lillo MP, Otón JM. THE UV PROTEIN FLUORESCENCE OF PURPLE MEMBRANE AND ITS APOMEMBRANE. Photochem Photobiol 1984. [DOI: 10.1111/j.1751-1097.1984.tb04598.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Saito Y, Tachibana H, Hayashi H, Wada A. EXCITATION-ENERGY TRANSFER BETWEEN TYROSINE AND TRYPTOPHAN IN PROTEINS EVALUATED BY THE SIMULTANEOUS MEASUREMENT OF FLUORESCENCE AND ABSORBANCE. Photochem Photobiol 1981. [DOI: 10.1111/j.1751-1097.1981.tb05420.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dembo M, Glushko V, Aberlin ME, Sonenberg M. A method for measuring membrane microviscosity using pyrene excimer formation. Application to human erythrocyte ghosts. BIOCHIMICA ET BIOPHYSICA ACTA 1979; 552:201-11. [PMID: 444502 DOI: 10.1016/0005-2736(79)90277-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In order to determine the microviscosity of human erythrocyte membrane suspensions, a method has been developed which is based on pyrene excimer formation. First, measurements of partitioning of pyrene into membranes, in conjunction with known values for the volume of the lipid compartment of erythrocyte ghosts are used to determine the concentration of pyrene in the membrane lipid. Secondly, reported measurements of the diffusion constants of aromatic hydrocarbons similar in structure to pyrene, are used to derive an empirical equation relating solvent viscosity and the diffusion constant of pyrene. Then, measurements of pyrene excimer formation in a series of solvents ranging up to several poise in viscosity are used to determine that the interaction diameter of the excimer formation reaction is 3 +/- 1 A. Finally all these data are brought together in order to conclude that the viscosity of the lipid in the human erythrocyte ghost is 8.0, 4.0 and 1.6 P at 10, 25 and 40 degrees C, respectively.
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Pranis RA, Klotz IM. Conformational behavior of polyethylenimine derivatives revealed by fluorescence spectroscopy. Biopolymers 1977. [DOI: 10.1002/bip.1977.360160207] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Cehelnik ED, Mielenz KD. Quantum counter photodetectors: a new design. APPLIED OPTICS 1976; 15:2259-2263. [PMID: 20165371 DOI: 10.1364/ao.15.002259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A new design for quantum counter cells is described that uses total internal reflection to minimize depth-of-penetration and polarization effects. This new cell is compared to a standard 1-cm thick quantum counter cylindrical cell. Solutions of 5 g/liter of rhodamine B chloride in ethylene glycol were used in both cells. The fluorescence emission from the cell was found to be significantly less polarized and also less dependent on excitation wavelength.
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40
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Rettig W, Wirz J. Electronic Structure and Photophysical Properties of Isoindole and its Benzo[f]- and Dibenzo[e,g]-Derivatives. Helv Chim Acta 1976. [DOI: 10.1002/hlca.19760590411] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Velapoldi RA, Travis JC, Cassatt WA, Yap WT. Inorganic ion-doped glass fibres as microspectrofluorimetric standards. J Microsc 1975. [DOI: 10.1111/j.1365-2818.1975.tb03986.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Szabo AG, Berens KB. Luminescence properties and related photochemistry of 4-amino-2-methoxypyrimidine. Photochem Photobiol 1975; 21:141-5. [PMID: 1135277 DOI: 10.1111/j.1751-1097.1975.tb06643.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Melhuish WH. Modified technique for determining the wavelength-sensitivity curve of a spectrofluorimeter. APPLIED OPTICS 1975; 14:26-27. [PMID: 20134828 DOI: 10.1364/ao.14.000026] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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