Investigations of the Reversible Energy Transfer in Concentrated Dye Solutions

1987 ◽  
Vol 42 (12) ◽  
pp. 1451-1455 ◽  
Author(s):  
C. Bojarski ◽  
G. Żurkowska
Keyword(s):  
Energy Transfer ◽  
Theoretical Model ◽  
Quantum Yield ◽  
Rhodamine B ◽  
Fluorescence Quantum Yield ◽  
Rhodamine 6G ◽  
Experimental Results ◽  
High Concentration ◽  
Concentration Region ◽  
Dye Solutions

In the system rhodamine 6G (donor)/rhodamine B (acceptor) the reverse energy transfer considerably increases the donor fluorescence quantum yield, particularly in the high concentration region. These experimental results confirm a theoretical model with no adjustable parameters.

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.

Manipulating Energy Transfer Processes between Rhodamine 6G and Rhodamine B in Different Mesoporous Hosts

2007 ◽  
Vol 111 (14) ◽  
pp. 5541-5548 ◽  
Author(s):  
Lingzhi Wang ◽  
Yuanlin Liu ◽  
Feng Chen ◽  
Jinlong Zhang ◽  
Masakazu Anpo
Keyword(s):  
Energy Transfer ◽  
Rhodamine B ◽  
Rhodamine 6G ◽  
Transfer Processes

Changes of Excitation Spectra of in vivo Chlorophyll Fluorescence during Induction of Photosynthesis

1993 ◽  
Vol 48 (1-2) ◽  
pp. 46-51 ◽  
Author(s):  
Wieslaw I. Gruszecki ◽  
Zbigniew Krupa
Keyword(s):  
Energy Transfer ◽  
Chlorophyll Fluorescence ◽  
Quantum Yield ◽  
Dark Adaptation ◽  
Fluorescence Quantum Yield ◽  
Excitation Energy Transfer ◽  
Reaction Centers ◽  
Excitation Spectra ◽  
In Vivo Chlorophyll Fluorescence

Excitation spectra of chlorophyll fluorescence from intact rye leaves were registered at different steps of the induction of photosynthesis after dark adaptation. Analysis of these spectra indicates that at least two processes related to spectroscopic features are responsible for a fluorescence quenching. The first one, active during the first 100 s of illumination, was interpreted to consists in an overall decrease of the fluorescence quantum yield of antenna pigments and chlorophylls, in particular close to the reaction centers. The second type of a fluorescence decrease (between 100 s and 300 s of illumination) was found to be in large extent related to decrease of the rate of an excitation energy transfer between accessory xanthophyll pigments and chlorophylls emitting fluorescence. This latter molecular mechanism is discussed as being related to violaxanthin availability to de-epoxidation in the xanthophyll cycle.

A THEORETICAL INTERPRETATION FOR THE EXCITATION ENERGY TRANSFER BETWEEN IDENTICAL MOLECULES IN LIQUID AND SOLID SOLUTION OF HIGH CONCENTRATION

1996 ◽  
Vol 10 (08) ◽  
pp. 347-352
Author(s):  
A.L. PHILIPPETIS
Keyword(s):  
Solid Solution ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Solid Solutions ◽  
Excitation Energy Transfer ◽  
Experimental Results ◽  
Theoretical Interpretation ◽  
Coupling Constant ◽  
High Concentration ◽  
Migration Of Energy

In this work we refer to some experimental results related. as we believe, with excitation energy transfer between molecules of the same kind in liquid and solid solutions of high concentration. We try to explain these results by a theoretical interpretation based on the assumption that the “migration of energy” depends on the distance between the molecules, the orientation of these molecules and on a coupling constant related with the type of these molecules.

SOLVENT EFFECT ON ABSOLUTE FLUORESCENCE QUANTUM YIELD OF RHODAMINE 6G DETERMINED USING TRANSIENT THERMAL LENS TECHNIQUE

1999 ◽  
Vol 13 (16) ◽  
pp. 563-576 ◽  
Author(s):  
C. V. BINDHU ◽  
S. S. HARILAL ◽  
V. P. N. NAMPOORI ◽  
C. P. G. VALLABHAN
Keyword(s):  
Quantum Yield ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield ◽  
Rhodamine 6G ◽  
Excited State Absorption ◽  
Fluorescence Yield ◽  
Dual Beam ◽  
Yield Values ◽  
Transient Thermal ◽  
Absolute Fluorescence

Dual beam thermal lens technique is successfully employed for the determination of absolute fluorescence quantum yield of rhodamine 6G laser dye in different solvents. A 532 nm radiation from a Q-switched Nd:YAG laser was used for the excitation purpose. The fluorescence quantum yield values are found to be strongly influenced by environmental effects. It has been observed that fluorescence yield is greater for rhodamine 6G in ethylene glycol system than in water or in methanol. Our results also indicate that parameters like concentration of the dye solution, aggregate formation and excited state absorption affect the absolute values of fluorescence yield significantly.

Isomérisation photosensibilisée par des colorants et photoréduction de l'azobenzène en solution. II

1974 ◽  
Vol 52 (10) ◽  
pp. 1858-1867 ◽  
Author(s):  
Jacques Ronayette ◽  
René Arnaud ◽  
Jacques Lemaire
Keyword(s):  
Methylene Blue ◽  
Energy Transfer ◽  
Quantum Yield ◽  
Rose Bengal ◽  
Experimental Results ◽  
The Other ◽  
Eosin Y ◽  
Triplet States ◽  
Trans Form ◽  
Photochemical Isomerization

The photochemical isomerization of azobenzene in solution can be sensitized by dyes which have low-lying triplet states (rose Bengal, eosin Y, fluorescein, methylene blue) but cannot be inhibited by such compounds. The two triplet levels, Tβc and Tαc of the cis form are indistinguishable experimentally. On the other hand, the experimental results verify the existence of two triplet levels, Tβt and Tαt, with different properties, in the trans form. Population, by energy transfer, of the lower triplet, Tαt, leads to isomerization with a quantum yield near 0.5, whereas population of the triplet Tβt only rarely leads to isomerization (quantum yield about 0.03).The photoreduction of azobenzene in isopropanol also has been studied. Only the cis form is photoreducible and it is very difficult experimentally to determine whether this photoreduction can be sensitized.A Jablonski diagram of the two forms of azobenzene is presented to correlate these observations. [Journal translation]

Fluorescent surfactants from common dyes – Rhodamine B and Eosin Y

2020 ◽  
Vol 92 (2) ◽  
pp. 265-274 ◽  
Author(s):  
Ashleigh D. Smith McWilliams ◽  
Selin Ergülen ◽  
Meredith M. Ogle ◽  
Carlos A. de los Reyes ◽  
Matteo Pasquali ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Chain Length ◽  
Rhodamine B ◽  
Fluorescence Quantum Yield ◽  
Fluorescent Dyes ◽  
Boron Nitride Nanotubes ◽  
Aliphatic Chain ◽  
Eosin Y ◽  
Imaging Tool ◽  
Potential Applications

AbstractEight fluorescent surfactants were synthesized by attaching aliphatic chains of 6, 10, 12, or 16 carbons to the fluorescent dyes Rhodamine B and Eosin Y. The obtained critical micelle concentrations (CMC) demonstrate an increasing CMC with decreasing aliphatic chain length, which is a typical behavior for surfactants. Additionally, fluorescence quantum yield experiments show a decrease in quantum yield with increasing aliphatic chain length, suggesting that the tails can interact with the dye, influencing its excited state. Finally, applications for the fluorescent surfactants were demonstrated; as a cellular stain in Panc-1 cells and as a dispersion and imaging tool for carbon and boron nitride nanotubes. These surfactants could provide a useful tool for a wide array of potential applications, from textile dyes to fluorescence imaging.

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