Influence of the Reversible Energy Transfer on the Donor Fluorescence Quantum Yieldin Donor-Acceptor Systems

1984 ◽  
Vol 39 (10) ◽  
pp. 948-951 ◽  
Author(s):  
C. Bojarski
Keyword(s):  
Energy Transfer ◽  
Quantum Yield ◽  
Nonradiative Energy Transfer ◽  
Acceptor Concentration ◽  
Donor And Acceptor ◽  
Donor Acceptor ◽  
Mixed Systems ◽  
High Donor ◽  
Concentration Ratios ◽  
Acceptor Molecules

Abstract In mixed systems of donor and acceptor molecules having closely located S1 levels a reversible nonradiative energy transfer should occur. It influences remarkably the dependence of the donor quantum yield ηD on the acceptor concentration in the range of high acceptor concentrations of systems with high donor-to-acceptor reduced concentration ratios.

Effect of donor-acceptor concentration ratios on nonradiative energy transfer in closely packed CdTe quantum dots

2009 ◽  
Vol 95 (13) ◽  
pp. 133123 ◽  
Author(s):  
Y. C. Lin ◽  
W. J. Wang ◽  
H. L. Chung ◽  
W. C. Chou ◽  
W. K. Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Nonradiative Energy Transfer ◽  
Cdte Quantum Dots ◽  
Acceptor Concentration ◽  
Donor Acceptor ◽  
Concentration Ratios

Fluorescence energy transfer studies in a cross-linked polyurethane network

1995 ◽  
Vol 73 (11) ◽  
pp. 1823-1830 ◽  
Author(s):  
Jie Yang ◽  
Mitchell A. Winnik
Keyword(s):  
Energy Transfer ◽  
Fluorescence Quenching ◽  
Fluorescence Decay ◽  
Critical Distance ◽  
Nonradiative Energy Transfer ◽  
Fluorescence Energy Transfer ◽  
Distribution Analysis ◽  
Analysis Method ◽  
Acceptor Concentration ◽  
Fluorescence Energy

A series of cross-linked polyurethane samples, labeled with dyes suitable for fluorescence energy transfer experiments, were prepared (donor, phenanthrene; acceptor, anthracene). Fluorescence decay profiles for these samples were measured as a function of acceptor concentration. These decays obey Förster nonradiative energy transfer kinetics, with an energy transfer critical distance (R0) of 26.7 Å. Fluorescence intensities, calculated from the decays by integrating the decay profiles, also fit the Perrin model, with a quenching radius (Rs) of 25.6 Å. The fluorescence decay profiles were further examined with a distribution analysis method, which also revealed uniformly distributed donors and acceptors in the polymer matrices. Keywords: fluorescence quenching, fluorescence decay, phenanthrene, anthracene, polyurethane.

Achieving high quantum yield charge separation in porphyrin-containing donor-acceptor molecules at 10 K

1988 ◽  
Vol 110 (21) ◽  
pp. 7219-7221 ◽  
Author(s):  
Michael R. Wasielewski ◽  
Douglas G. Johnson ◽  
Walter A. Svec ◽  
Kristin M. Kersey ◽  
David W. Minsek
Keyword(s):  
Quantum Yield ◽  
Charge Separation ◽  
High Quantum Yield ◽  
High Quantum ◽  
Donor Acceptor ◽  
Acceptor Molecules

Elektronenanregungsenergieiibergang zwischen ungleichartigen Molekiilen in Losung / Electronic Excitation Energy Transition among unlike Molecules in Solution

1977 ◽  
Vol 32 (2) ◽  
pp. 140-143 ◽  
Author(s):  
J. Kamiński ◽  
A. Kawski
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Energy Transition ◽  
Mutual Orientation ◽  
Resonance Excitation ◽  
Electronic Excitation Energy ◽  
Radiationless Energy Transfer ◽  
Donor And Acceptor ◽  
Acceptor Molecules

In studying the radiationless energy transfer between unlike molecules (heterotransfer) in fluid and rigid solutions the fluctuations of the concentration of the acceptor molecules, as well as the dependence of the probability of resonance excitation energy transfer on the mutual orientation of the transition moments of the interacting donor and acceptor molecules have been taken into account. With these and the assumptions of the shell model of a luminescent centre (A. Kawski and J. Kaminski, Z. Naturforsch. 29 a, 452 [1974]) one obtains the Förster expression for the quantum yield of the donor fluorescence quenched by foreign absorbing substances

scholarly journals Cyan-emitting and orange-emitting fluorescent proteins as a donor/acceptor pair for fluorescence resonance energy transfer

2004 ◽  
Vol 381 (1) ◽  
pp. 307-312 ◽  
Author(s):  
Satoshi KARASAWA ◽  
Toshio ARAKI ◽  
Takeharu NAGAI ◽  
Hideaki MIZUNO ◽  
Atsushi MIYAWAKI
Keyword(s):  
Energy Transfer ◽  
Fluorescence Resonance Energy Transfer ◽  
Fluorescent Proteins ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Acceptor Pair ◽  
Donor And Acceptor ◽  
Donor Acceptor ◽  
Donor Acceptor Pair ◽  
Fluorescence Resonance

GFP (green fluorescent protein)-based FRET (fluorescence resonance energy transfer) technology has facilitated the exploration of the spatio-temporal patterns of cellular signalling. While most studies have used cyan- and yellow-emitting FPs (fluorescent proteins) as FRET donors and acceptors respectively, this pair of proteins suffers from problems of pH-sensitivity and bleeding between channels. In the present paper, we demonstrate the use of an alternative additional donor/acceptor pair. We have cloned two genes encoding FPs from stony corals. We isolated a cyan-emitting FP from Acropara sp., whose tentacles exhibit cyan coloration. Similar to GFP from Renilla reniformis, the cyan FP forms a tight dimeric complex. We also discovered an orange-emitting FP from Fungia concinna. As the orange FP exists in a complex oligomeric structure, we converted this protein into a monomeric form through the introduction of three amino acid substitutions, recently reported to be effective for converting DsRed into a monomer (Clontech). We used the cyan FP and monomeric orange FP as a donor/acceptor pair to monitor the activity of caspase 3 during apoptosis. Due to the close spectral overlap of the donor emission and acceptor absorption (a large Förster distance), substantial pH-resistance of the donor fluorescence quantum yield and the acceptor absorbance, as well as good separation of the donor and acceptor signals, the new pair can be used for more effective quantitative FRET imaging.

Prediction of the Influence of Concentration on the Photoluminescence Decay Time of Solutions

1980 ◽  
Vol 35 (3) ◽  
pp. 345-349 ◽  
Author(s):  
R. Twardowski ◽  
C. Bojarski
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Decay Time ◽  
Excitation Energy Transfer ◽  
Fluorescence Decay ◽  
Concentration Quenching ◽  
Photoluminescence Decay ◽  
Donor And Acceptor ◽  
Fluorescence Decay Time ◽  
Acceptor Molecules

Abstract A formula for the donor photoluminescence decay time in its dependence on the concentrations of donor D and acceptor A has been derived from equations for the non-radiative excitation energy transfer between randomly distributed donor and acceptor molecules within a nonactive medium. In the limit [D]/[A] → 0 the formula becomes identical with that of Galanin [7], while in the absence of concentration quenching the fluorescence decay time does not depend on the concentrations.

Strahlungslose Übertragung der Anregungsenergie in lumineszierenden Lösungen verschiedener Konzentrationsverhältnisse von Donor zu Akzeptor / Non-Radiative Excitation Energy Transfer in Luminescent Solutions at Different Ratios of Donor to Acceptor Concentration

1973 ◽  
Vol 28 (10) ◽  
pp. 1697-1702 ◽  
Author(s):  
C. Bojarski ◽  
F. Burak ◽  
E. Grabowska
Keyword(s):  
Energy Transfer ◽  
Quantum Yield ◽  
Excitation Energy ◽  
Acta Phys ◽  
Rhodamine B ◽  
Excitation Energy Transfer ◽  
Experimental Results ◽  
Quantum Yields ◽  
Full Agreement ◽  
Acceptor Concentration

Photoluminescence (PL) quantum yields (η/η0) of Na-fluoresceine (donor) in dependence on phloxin (acceptor) concentration in glycerin-water solutions at ratios of donor to acceptor concentration CD/CA equal to 48.2, 14.5 and 2.4 have been measured.Similar measurements have been made on acriflavine (donor) and rhodamine B (acceptor) in methanol for CD/CA = 10 and 0.4. In all systems investigated it was found that the PL-yield η/η0 of the donor at a fixed value of CA is the smaller the bigger is the value of CD/CA. The experimental results have been compared with a theory (Z. Naturforsch. 25 a, 1760 [1970], Acta Phys. Hung. 30, 145 [1971]) describing concentrational changes of the PL-quantum yield. Full agreement of theory with experiment is found and the possibility of multi-step non-radiative excitation energy transfer from donor to acceptor has been proved.

Donor–acceptor nonradiative energy transfer mediated by surface plasmons on ultrathin metallic films

2010 ◽  
Vol 373 (3) ◽  
pp. 238-242 ◽  
Author(s):  
Dawid Jankowski ◽  
Piotr Bojarski ◽  
Piotr Kwiek ◽  
Simeonika Rangełowa-Jankowska
Keyword(s):  
Energy Transfer ◽  
Surface Plasmons ◽  
Nonradiative Energy Transfer ◽  
Metallic Films ◽  
Donor Acceptor
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