Spectroscopic Investigation of Carotenoids Involved in Non-Photochemical Fluorescence Quenching

2014 ◽  
pp. 203-227 ◽  
Author(s):  
Tomáš Polívka ◽  
Harry A. Frank
Keyword(s):  
Fluorescence Quenching ◽  
Spectroscopic Investigation

Near Field Spectroscopic Investigation of Fluorescence Quenching by Charge Carriers in Pentacene-Doped Tetracene

2004 ◽  
Vol 108 (31) ◽  
pp. 11368-11374 ◽  
Author(s):  
Jason D. McNeill ◽  
Doo Young Kim ◽  
Zhonghua Yu ◽  
Donald B. O'Conno ◽  
Paul F. Barbara
Keyword(s):  
Fluorescence Quenching ◽  
Spectroscopic Investigation ◽  
Near Field ◽  
Charge Carriers

scholarly journals Spectroscopic Investigation of Fluorescence Quenching Agents. Part II: Effect of Nitromethane on the Fluorescence Emission Behavior of Thirty-Six Alternant Benzenoid Polycyclic Aromatic Hydrocarbons

1992 ◽  
Vol 46 (8) ◽  
pp. 1260-1265 ◽  
Author(s):  
Sheryl A. Tucker ◽  
Hardjanti Darmodjo ◽  
William E. Acree ◽  
John C. Fetzer ◽  
Maximilian Zander
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Fluorescence Quenching ◽  
Aromatic Hydrocarbons ◽  
Spectroscopic Investigation ◽  
Fluorescence Probe ◽  
Fluorescence Emission ◽  
Solvent Polarity ◽  
Polycyclic Aromatic ◽  
Emission Behavior ◽  
Emission Intensity Ratio

Nitromethane is examined as a selective quenching agent for discriminating between “alternant” versus “nonalternant” polycyclic aromatic hydrocarbons in unknown mixtures. Of the 36 benzenoid solutes studied, only dibenzo[hi,wx]heptaphene failed to obey the selective quenching rule. Also reported are new experimental fluorescence probe studies for dibenzo[de,st]pentacene, dibenzo[fg,qr]pentacene, naphtho[8,1,2hij)-hexaphene, benzo[vwx]hexaphene, benzo[1,2,3cd;4,5,6c'd‘]diperylene, dibenzo[hi,wx]heptacene, benzo[b]triphenylene, chrysense, and anthracene dissolved in nonelectrolyte solvents of varying polarity. Benzo-[vwx]hexaphene was found to exhibit probe character, as evidenced by a systematic variation in emission intensity ratio with solvent polarity.

scholarly journals Highly Selective Recognition of Pyrophosphate by a Novel Coumarin-Iron (III) Complex and the Application in Living Cells

Chemosensors ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 48
Author(s):  
Wei Wang ◽  
Hongren Zhao ◽  
Bing Zhao ◽  
Huimin Liu ◽  
Qinglei Liu ◽  
...  
Keyword(s):  
Detection Limit ◽  
Fluorescence Quenching ◽  
Membrane Permeability ◽  
Spectroscopic Investigation ◽  
Adenosine Diphosphate ◽  
Living Cells ◽  
Basis Set ◽  
Selective Recognition ◽  
Selective Detection ◽  
Intracellular Imaging

In this paper, a novel NL-Fe3+ ensemble was designed as a fluorescent chemosensor for highly selective detection of pyrophosphate (PPi) in DMSO/H2O (2:8/v:v, pH = 7.2) solution and living cells. NL showed a strong affinity for Fe3+ and was accompanied by obvious fluorescence quenching. Upon the addition of PPi to the generated NL-Fe3+ ensemble, the fluorescence and absorption spectra were recovered completely. Spectroscopic investigation showed that the interference provoked by common anions such as adenosine-triphosphate (ATP), adenosine diphosphate (ADP), and phosphates (Pi) can be ignored. The detection limit of NL-Fe3+ to PPi was calculated to be 1.45 × 10−8 M. Intracellular imaging showed that NL-Fe3+ has good membrane permeability and could be used for the detection of PPi in living cells. A B3LYP/6-31G(d,p) basis set was used to optimize NL and NL-Fe3+ complex.

Spectroscopic Investigation, Effect of Solvent Polarity and Fluorescence Quenching of a New D-π-A Type Chalcone Derivative

2014 ◽  
Vol 24 (6) ◽  
pp. 1629-1638 ◽  
Author(s):  
Mehboobali Pannipara ◽  
Abdullah M. Asiri ◽  
Khalid A. Alamry ◽  
Muhammad N Arshad ◽  
Samy A. El-Daly
Keyword(s):  
Fluorescence Quenching ◽  
Spectroscopic Investigation ◽  
Solvent Polarity ◽  
Effect Of Solvent ◽  
Chalcone Derivative

scholarly journals Spectroscopic Investigation of Fluorescence Quenching Agents: Effect of Nitromethane on the Fluorescence Emission Behavior of Select Cyclopenta-PAH, Aceanthrylene, and Fluorene Derivatives

1992 ◽  
Vol 46 (7) ◽  
pp. 1156-1161 ◽  
Author(s):  
Vicki L. Amszi ◽  
Yvonne Cordero ◽  
Bradley Smith ◽  
Sheryl A. Tucker ◽  
William E. Acree ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Fluorescence Quenching ◽  
Aromatic Hydrocarbons ◽  
Spectroscopic Investigation ◽  
Fluorescence Emission ◽  
Complete Agreement ◽  
Solvent Mixtures ◽  
Aqueous Acetonitrile ◽  
Polycyclic Aromatic ◽  
Emission Behavior

Nitromethane is examined as a selective fluorescence quenching agent for “alternant” alkyl-substituted polycyclic aromatic hydrocarbons (PAHs). Fluorescence emission behavior is reported for 11 H-benz[bc]aceanthrylene, 4 H-cyclopenta[def]phenanthrene, 4 H-cyclopenta[def]chrysene, 13 H-dibenzo[a,g]fluorene, 13 H-dibenzo[a,i]fluorene, 4 H-benzo[b]cyclopenta[mno]chrysene, 4 H-cyclopenta[pqr]picene, 7 H-dibenzo[c,g]fluorene, 9 H-benz(6,7)indeno[1,21]phenanthrene, 4 H-benzo[b]cyclopenta[jkl]triphenylene, 13 H-dibenz[bc,k]aceanthrylene, 13 H-dibenz[bc,l]aceanthrylene, and 4 H-benzo[def]cyclopenta[mno]chrysene dissolved in organic solvents of varying polarity and in acetonitrile or aqueous-acetonitrile solvent mixtures at various nitromethane concentrations. Results of these measurements show that nitromethane quenches fluorescence emission of the thirteen solutes studied, which is in complete agreement with what would be expected on the basis of the fact that all solutes are “alternant” polycyclic aromatic hydrocarbons.

Some Results of the Spectroscopic Study of Four Close Binary Systems of Early Spectral Types

1965 ◽  
Vol 5 ◽  
pp. 120-130
Author(s):  
T. S. Galkina
Keyword(s):  
Spectroscopic Study ◽  
Spectral Type ◽  
Spectroscopic Investigation ◽  
Binary Systems ◽  
Quantitative Information ◽  
Close Binary ◽  
Physical Parameters ◽  
Absorption And Emission ◽  
Close Binary Systems ◽  
Quantitative Estimates

It is necessary to have quantitative estimates of the intensity of lines (both absorption and emission) to obtain the physical parameters of the atmosphere of components.Some years ago at the Crimean observatory we began the spectroscopic investigation of close binary systems of the early spectral type with components WR, Of, O, B to try and obtain more quantitative information from the study of the spectra of the components.

SPECTROSCOPIC INVESTIGATION OF THE SUBBAND EDGE RENORMALIZATION IN ELECTRON-HOLE PLASMAS IN GaAs/GaAlAs QUANTUM WELLS

1987 ◽  
Vol 48 (C5) ◽  
pp. C5-403-C5-406
Author(s):  
E. LACH ◽  
G. TRÄNKLE ◽  
A. FORCHEL ◽  
G. WEIMANN
Keyword(s):  
Quantum Wells ◽  
Spectroscopic Investigation ◽  
Electron Hole
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