The Generation of Aryl Anions by Double Electron Transfer to Aryl Iodides from a Neutral Ground-State Organic Super-Electron Donor

2007 ◽  
Vol 46 (27) ◽  
pp. 5178-5183 ◽  
Author(s):  
John A. Murphy ◽  
Sheng-ze Zhou ◽  
Douglas W. Thomson ◽  
Franziska Schoenebeck ◽  
Mohan Mahesh ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Ground State ◽  
Aryl Iodides ◽  
Double Electron ◽  
Neutral Ground

The Generation of Aryl Anions by Double Electron Transfer to Aryl Iodides from a Neutral Ground-State Organic Super-Electron Donor

2007 ◽  
Vol 119 (27) ◽  
pp. 5270-5275 ◽  
Author(s):  
John A. Murphy ◽  
Sheng-ze Zhou ◽  
Douglas W. Thomson ◽  
Franziska Schoenebeck ◽  
Mohan Mahesh ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Ground State ◽  
Aryl Iodides ◽  
Double Electron ◽  
Neutral Ground

A new ground state single electron donor for excess electron transfer studies in DNA

2009 ◽  
pp. 3583 ◽  
Author(s):  
Christian Trindler ◽  
Antonio Manetto ◽  
Jürgen Eirich ◽  
Thomas Carell
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Ground State ◽  
Excess Electron ◽  
Single Electron

scholarly journals Electron transfer quenching in light adapted and mutant forms of the AppA BLUF domain

2015 ◽  
Vol 177 ◽  
pp. 293-311 ◽  
Author(s):  
Sergey P. Laptenok ◽  
Andras Lukacs ◽  
Richard Brust ◽  
Allison Haigney ◽  
Agnieszka Gil ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Ground State ◽  
Structural Changes ◽  
Structure Change ◽  
Radical Intermediate ◽  
Time Resolved ◽  
Radical Intermediates ◽  
Bluf Domain ◽  
A Charge

The Blue Light Using Flavin (BLUF) domain proteins are an important family of photoreceptors controlling a range of responses in a wide variety of organisms. The details of the primary photochemical mechanism, by which light absorption in the isoalloxazine ring of the flavin is converted into a structure change to form the signalling state of the protein, is unresolved. In this work we apply ultrafast time resolved infra-red (TRIR) spectroscopy to investigate the primary photophysics of the BLUF domain of the protein AppA (AppABLUF) a light activated antirepressor. Here a number of mutations at Y21 and W104 in AppABLUF are investigated. The Y21 mutants are known to be photoinactive, while W104 mutants show the characteristic spectral red-shift associated with BLUF domain activity. Using TRIR we observed separately the decay of the excited state and the recovery of the ground state. In both cases the kinetics are found to be non-single exponential for all the proteins studied, suggesting a range of ground state structures. In the Y21 mutants an intermediate state was also observed, assigned to formation of the radical of the isoalloxazine (flavin) ring. The electron donor is the W104 residue. In contrast, no radical intermediates were detected in the studies of the photoactive dark adapted proteins, dAppABLUF and the dW104 mutants, suggesting a structure change in the Y21 mutants which favours W104 to isoalloxazine electron transfer. In contrast, in the light adapted form of the proteins (lAppABLUF, lW104) a radical intermediate was detected and the kinetics were greatly accelerated. In this case the electron donor was Y21 and major structural changes are associated with the enhanced quenching. In AppABLUF and the seven mutants studied radical intermediates are readily observed by TRIR spectroscopy, but there is no correlation with photoactivity. This suggests that if a charge separated state has a role in the BLUF photocycle it is only as a very short lived intermediate.

scholarly journals Synthesis of an elusive, stable 2-azaallyl radical guided by electrochemical and reactivity studies of 2-azaallyl anions

2021 ◽  
Author(s):  
Grace B. Panetti ◽  
Patrick J. Carroll ◽  
Michael R. Gau ◽  
Brian C. Manor ◽  
Eric J. Schelter ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Transfer Characteristics

The super electron donor (SED) capabilities of 2-azaallyl anions has recently been discovered and applied to diverse reactivity; their structures and electron transfer characteristics are reported herein.

scholarly journals Assessing the Accuracy of Simplified Coupled Cluster Methods for Electronic Excited States in F0 Actinide Compounds

2019 ◽  
Author(s):  
Artur Nowak ◽  
Paweł Tecmer ◽  
Katharina Boguslawski
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Excited States ◽  
Coupled Cluster ◽  
Electronic Excitations ◽  
Electronic Excited States ◽  
Benchmark Study ◽  
Double Electron ◽  
Different Types ◽  
Cluster Methods

<p>We present a benchmark study of the performance of various recently presented EOM-pCCD-based methods to model ground and excited state properties of a set of f0 actinide species that feature different types of electronic excitations, like local excitations or charge transfer. Our data suggests that the recently developed EOM-pCCD-LCCSD method outperforms conventional approaches like EOM-CCSD reducing the standard error by a factor of 2 (to 0.25 eV). Thus, EOM-pCCD-LCCSD can be considered as an alternative to model excited states in challenging systems, especially those who feature a double electron transfer for which EOM-CCSD typically fails.</p>

Perturbed ground state method for electron transfer

1999 ◽  
Vol 111 (17) ◽  
pp. 7818-7827 ◽  
Author(s):  
Oleg V. Prezhdo ◽  
James T. Kindt ◽  
John C. Tully
Keyword(s):  
Electron Transfer ◽  
Ground State ◽  
State Method
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