A Competition between Dissociation Pathway and Energy Transfer Pathway: Unimolecular Dissociation of a Benzene–Hexafluorobenzene Complex in Nitrogen Bath

2019 ◽  
Vol 123 (50) ◽  
pp. 10663-10675
Author(s):  
Sk. Samir Ahamed ◽  
Himashree Mahanta ◽  
Amit K. Paul
Keyword(s):  
Energy Transfer ◽  
Unimolecular Dissociation ◽  
Dissociation Pathway ◽  
Energy Transfer Pathway

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>

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

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

scholarly journals ULTRASTRUCTURAL BASES FOR METABOLICALLY LINKED MECHANICAL ACTIVITY IN MITOCHONDRIA

1968 ◽  
Vol 37 (2) ◽  
pp. 345-369 ◽  
Author(s):  
Charles R. Hackenbrock
Keyword(s):  
Energy Transfer ◽  
Electron Transport ◽  
Mechanical Activity ◽  
Ultrastructural Organization ◽  
Antimycin A ◽  
Isolated Mitochondria ◽  
Exogenous Substrate ◽  
Activated State ◽  
Energy Transfer Pathway ◽  
Ultrastructural Transformation

Isolated mitochondria are capable of undergoing dramatic reversible ultrastructural transformations between a condensed and an orthodox conformation. These two conformations are the extremes in ultrastructural organization between which structually and functionally intact mitochondria transform during reversible respiratory cycles. It has been found that electron transport is required for the condensed-to-orthodox ultrastructural transformation which occurs in mitochondria under State IV conditions, i.e., under conditions in which exogenous substrate is present and ADP is deficient. Inhibition of State IV electron transport at the cyanide-, antimycin A-, or Amytal-sensitive sites in the respiratory chain results in inhibition of this transformation. Resumption of electron transport in initially inhibited mitochondrial systems, initiated by channeling electrons through pathways which bypass the inhibited sites, results in resumption of the ultrastructural transformation. The condensed-to-orthodox transformation is DNP insensitive and, therefore, does not require participation of the coupling enzymes of the energy-transfer pathway. It is concluded that this ultrastructural transformation is manifest by the conversion of the chemical energy of electron transport directly into mechanical work. The reversed ultrastructural transformation, i.e., orthodox-to-condensed, which occurs during ADP-activated State III electron transport, is inhibited by DNP and parallels suppression of acceptor control and oxidative phosphorylation. Mechanochemical ultrastructural transformation as a basis for energy transfer in mitochondria is considered with respect to the results presented.

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