نتایج جستجو برای: electron donors

تعداد نتایج: 344426  

2005
ANGBO FANG

The discovery of efficient quantum algorithms a decade ago has shown that a quantum computer encoding and processing information quantum mechanically, can solve important problems intractable with conventional computers. The invention of quantum error correction principle, makes quantum computation possibly fault-tolerant against the decoherence of information carriers. Thereafter, intensive re...

Journal: :Chemical communications 2012
Sissel S Andersen Morten Jensen Anne Sørensen Eigo Miyazaki Kazuo Takimiya Bo W Laursen Amar H Flood Jan O Jeppesen

Binding studies between the electron accepting host cyclobis(paraquat-p-phenylene) and a series of electron donors in the presence of differently sized counteranions reveal that both the nature and the concentration of the anion have a large impact on the association strength of the resulting host-guest complex.

Journal: :Chemical communications 2015
Christina M Davis Kei Ohkubo I-Ting Ho Zhan Zhang Masatoshi Ishida Yuanyuan Fang Vincent M Lynch Karl M Kadish Jonathan L Sessler Shunichi Fukuzumi

Photoexcitation of dichloromethane solutions of an uranyl macrocyclic complex with cyclo[1]furan[1]pyridine[4]-pyrrole () at the near-infrared (NIR) band (1177 nm) in the presence of electron donors and acceptors resulted in NIR-induced electron transfer without producing singlet oxygen via energy transfer.

2005
E. Abe J. Isoya K. M. Itoh

We investigate spin coherence time of electrons bound to phosphorus donors in silicon single crystals, employing a pulsed electron paramagnetic resonance technique. The samples were isotopically controlled so that they may possess different concentrations (about 5% and 100%) of 29Si, which is the only non-zero-spin (spin-1/2) stable isotope of Si. Both 29Siconcentration dependence and orientati...

Journal: :Current opinion in chemical biology 1992
J R Winkler

Long-range electronic interactions between electron donors and acceptors in proteins depend on the structure of the intervening polypeptide. Several methods have been developed for calculating these weak couplings. New challenges in protein electron-transfer research include identifying the role of protein dynamics, and characterizing multistep tunneling over very long distances.

Journal: :The Journal of biological chemistry 1965
D L KEISTER

Photophosphorylation by the chloroplast is postulated to require electron flow through the electron transport chain between the weak reductant of Light Reaction II and the oxidant of Light Reaction I (terminology according to Duysens, Amesz, and Kamp (1)). This investigation was initiated to find reagents that could react chemically as electron donors with components of the electron transport c...

Journal: :The Journal of organic chemistry 2017
Keying Ding Shi Xu Rajeh Alotaibi Keshav Paudel Eric W Reinheimer Jessie Weatherly

We report here the first systematic study of nickel-catalyzed decarbonylation of aromatic aldehydes under relatively mild conditions. Aldehydes with electron donating groups at para and ortho positions are generally successful with our method. For aldehydes with electron-withdrawing groups, significantly higher yields were achieved for ortho-substituted substrates than para ones, probably due t...

2010
R. E. Jones S. X. Li H. Lu

InN films grown by molecular beam epitaxy have been subjected to 2 MeV He + irradiation followed by thermal annealing. Theoretical analysis of the electron mobilities shows that thermal annealing removes triply charged donor defects, creating films with electron mobilities approaching those predicted for uncompensated, singly charged donors. Optimum thermal annealing of irradiated InN can be us...

2018
E. S. Merijn Blaakmeer Giuseppe Antinucci Andrea Correa Vincenzo Busico Ernst R. H. van Eck Arno P. M. Kentgens

Ziegler-Natta catalysis is a very important industrial process for the production of polyolefins. However, the catalysts are not well-understood at the molecular level. Yet, atomic-scale structural information is of pivotal importance for rational catalyst development. We applied a solid-state NMR/density functional theory tandem approach to gain detailed insight into the interactions between t...

2012
S. S. BRODY SEYMOUR STEVEN BRODY

Photoreactions and complexation reactions between monolayers of chloroplyll a, at a water-air interface, and various electron donors and acceptor in a W il h e 1 m y film balance. When phenazine methosulfate (PMS), ascorbate, benzyl viologen (BV), or dehydroascorbic acid are present in the aqueous subphase, the area/molecule increases with substrate concentration in accordance with a L a n g m ...

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