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

Excess electron transfer dynamics in DNA hairpins conjugated with N,N-dimethylaminopyrene as a photosensitizing electron donor

2012 ◽  
Vol 48 (89) ◽  
pp. 11008 ◽  
Author(s):  
Man Jae Park ◽  
Mamoru Fujitsuka ◽  
Haruhiro Nishitera ◽  
Kiyohiko Kawai ◽  
Tetsuro Majima
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Excess Electron ◽  
Dna Hairpins

DNA Hairpins Containing a Diaminostilbene Derivative as a Photoinduced Electron Donor for Probing the Effects of Single-Base Mismatches on Excess Electron Transfer in DNA

2009 ◽  
Vol 11 (4) ◽  
pp. 927-930 ◽  
Author(s):  
Takeo Ito ◽  
Aiko Hayashi ◽  
Akiko Kondo ◽  
Tsukasa Uchida ◽  
Kazuhito Tanabe ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Excess Electron ◽  
Dna Hairpins ◽  
Single Base

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

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.

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

Reversal of Polarity by Catalytic SET Oxidation: Synthesis of Azabicyclo[m.n.o]alkanes via Chemoselective Reduction of Amidines

2021 ◽  
Author(s):  
Sundarababu Baskaran ◽  
Kirana D V ◽  
Kanak Kanti Das
Keyword(s):  
Electron Transfer ◽  
Stereoselective Synthesis ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Catalytic Method ◽  
One Pot ◽  
Oxidative System ◽  
Oxidation Synthesis

A one-pot catalytic method has been developed for the stereoselective synthesis of cyclopropane-fused cyclic amidines using CuBr2/K2S2O8 as an efficient single electron transfer (SET) oxidative system. The generality of this...

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.

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