Article

1998 ◽  
Vol 76 (10) ◽  
pp. 759-770
Author(s):  
M Musso ◽  
F Fuso ◽  
G De Filippo ◽  
M Allegrini ◽  
D Gruber ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Emission Spectrum ◽  
Pulsed Laser ◽  
Level Population ◽  
Sodium Atoms ◽  
Energy Transfer Pathway

Transfer of excitation from cadmium to sodium atoms was investigated in anheat pipe oven illuminated by a pulsed laser tuned on the intercombinationtransition of cadmium. A rich emission spectrum with cadmium as well assodium lines was observed. Intramultiplet mixing distributes the initialexcited level population 5p3P1 to the nearby fine structurelevels 5p3P0,2 of the same multiplet. We have experimentalevidence that the energy transfer pathway is from Cd (5p3PJ) to Na(4p2PJ) which is collisionally rapidly converted toNa(3d2DJ), from which the strongest emission was observed.PACS No.: 34.90+q

Carbon-Heteroatom Cross-Coupling via an Electronically Excited Nickel (II) Complex

2019 ◽  
Author(s):  
Randolph Escobar ◽  
Jeffrey Johannes
Keyword(s):  
Energy Transfer ◽  
Functional Groups ◽  
Cross Coupling ◽  
Reductive Elimination ◽  
Aryl Halides ◽  
Coupling Reactions ◽  
General Methodology ◽  
Cross Coupling Reactions ◽  
Electronically Excited ◽  
Energy Transfer Pathway

<div>While carbon-heteroatom cross coupling reactions have been extensively studied, many methods are specific and</div><div>limited to a set of substrates or functional groups. Reported here is a method that allows for C-O, C-N and C-S cross coupling reactions under one general methodology. We propose that an energy transfer pathway, in which an iridium photosensitizer produces an excited nickel (II) complex, is responsible for the key reductive elimination step that couples aryl halides to 1° and 2° alcohols, anilines, thiophenols, carbamates and sulfonamides.</div>

Extraction of energy transfer rate constants from the pulsed laser generated thermal lens spectrometer signal

1982 ◽  
Vol 80 ◽  
pp. 433-436 ◽  
Author(s):  
R.T. Bailey ◽  
F.R. Cruickshank ◽  
R. Guthrie ◽  
D. Pugh ◽  
I.J.M. Weir
Keyword(s):  
Energy Transfer ◽  
Thermal Lens ◽  
Rate Constants ◽  
Transfer Rate ◽  
Pulsed Laser ◽  
Energy Transfer Rate

A fluorescence enhancement assay of cell fusion

1977 ◽  
Vol 28 (1) ◽  
pp. 167-177
Author(s):  
P.M. Keller ◽  
S. Person ◽  
W. Snipes
Keyword(s):  
Absorption Spectrum ◽  
Energy Transfer ◽  
Emission Spectrum ◽  
Cell Fusion ◽  
Saturated Hydrocarbon ◽  
Photon Emission ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Hydrocarbon Chains ◽  
Fluorescent Molecules

Two probes were synthesized which consist of fluorescent molecules conjugated to saturated hydrocarbon chains, 18 carbons long, to ensure their localization into cellular membranes. There is an overlap between the emission spectrum of one probe (donor) and the absorption spectrum of the other probe (acceptor). By the use of appropriate wavelengths it is possible to specifically excite the donor probe and record the fluorescence of the acceptor probe. Two cell populations, each labelled with one of the probes, were infected with a virus that causes cell fusion, mixed in equal proportions, and the fluorescence of the acceptor probe measured as a function of time after infection. An increase in fluorescence was observed beginning at the time of onset of cell fusion indicating a mixing of the fluorescent membrane molecules. An investigation of the distance dependence indicated that the increase in fluorescence was mainly due to resonance energy transfer and not to photon emission and reabsorption. Resonance energy transfer requires that the 2 probes be close together and that there be an overlap of the emission spectrum of the donor probe and the absorption spectrum of the acceptor probe. The possible application of this assay to other types of membrane fusion is noted.

Molecule formation and energy transfer processes in a vapor with high density of 3P-excited sodium atoms

1977 ◽  
Vol 22 (3) ◽  
pp. 329-332 ◽  
Author(s):  
M. Allegrini ◽  
G. Alzetta ◽  
A. Kopystynska ◽  
L. Moi ◽  
G. Orriols
Keyword(s):  
Energy Transfer ◽  
High Density ◽  
Transfer Processes ◽  
Molecule Formation ◽  
Sodium Atoms

New insights into the binding behavior of lomefloxacin and human hemoglobin using biophysical techniques: binary and ternary approaches

2019 ◽  
Vol 43 (21) ◽  
pp. 8132-8145 ◽  
Author(s):  
Parisa Mokaberi ◽  
Vida Reyhani ◽  
Zeinab Amiri-Tehranizadeh ◽  
Mohammad Reza Saberi ◽  
Sima Beigoli ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Energy Transfer ◽  
Emission Spectrum ◽  
High Probability ◽  
Fluorescence Emission ◽  
Fluorescence Emission Spectrum ◽  
Human Hemoglobin ◽  
Binding Behavior ◽  
Biophysical Techniques

Demonstrates the overlap that had been induced between the fluorescence emission spectrum of Hb and the absorption spectrum of drugs, which has proved that there is a high probability to the occurrence of energy transfer from Hb and LMF in the absence and presence of NRF.

Ultrafast Energy-Transfer Pathway in a Purple-Bacterial Photosynthetic Core Antenna, as Revealed by Femtosecond Time-Resolved Spectroscopy

2010 ◽  
Vol 50 (5) ◽  
pp. 1097-1100 ◽  
Author(s):  
Daisuke Kosumi ◽  
Satoshi Maruta ◽  
Tomoko Horibe ◽  
Ritsuko Fujii ◽  
Mitsuru Sugisaki ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Energy Transfer Pathway
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