Fast photo-driven electron spin coherence transfer: the effect of electron-nuclear hyperfine coupling on coherence dephasing

2015 ◽  
Vol 3 (30) ◽  
pp. 7962-7967 ◽  
Author(s):  
Matthew D. Krzyaniak ◽  
Lukáš Kobr ◽  
Brandon K. Rugg ◽  
Brian T. Phelan ◽  
Eric A. Margulies ◽  
...  
Keyword(s):  
Electron Spin ◽  
Electron Donor ◽  
Quantum Coherence ◽  
Hyperfine Coupling ◽  
Acceptor Molecule ◽  
Spin Coherence ◽  
Coherence Transfer ◽  
Radical Pairs ◽  
Donor Acceptor ◽  
Covalently Linked

A covalently-linked electron donor–acceptor–acceptor molecule was utilized to study the effect of electron-nuclear hyperfine coupling on the dephasing of the zero quantum coherence in spin correlated radical pairs.

Femtosecond Transient Grating Studies of Chlorophylls and a Chlorophyll-Based Electron Donor-Acceptor Molecule

1995 ◽  
Vol 99 (21) ◽  
pp. 8918-8926 ◽  
Author(s):  
Gary P. Wiederrecht ◽  
Walter A. Svec ◽  
Mark P. Niemczyk ◽  
Michael R. Wasielewski
Keyword(s):  
Electron Donor ◽  
Acceptor Molecule ◽  
Transient Grating ◽  
Donor Acceptor

Unusually large hyperfine structure of the electron spin levels in an endohedral dimetallofullerene and its spin coherent properties

Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20513-20521
Author(s):  
Ruslan B. Zaripov ◽  
Yuri E. Kandrashkin ◽  
Kev M. Salikhov ◽  
Bernd Büchner ◽  
Fupin Liu ◽  
...  
Keyword(s):  
Hyperfine Structure ◽  
Electron Spin ◽  
Hyperfine Coupling ◽  
Hyperfine Coupling Constant ◽  
Broad Temperature Range ◽  
Epr Spectra ◽  
Coupling Constant ◽  
Spin Coherence ◽  
Temperature Range

Sc2@C80(CH2Ph) with giant 45Sc hyperfine coupling constant yields fully-resolved EPR spectra and maintains spin coherence in a broad temperature range.

scholarly journals A Brief History of Photoactive Interlocked Systems Assembled by Transition Metal Template Synthesis

Photochem ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 411-433
Author(s):  
Vitor H. Rigolin ◽  
Liniquer A. Fontana ◽  
Jackson D. Megiatto
Keyword(s):  
Electron Transfer ◽  
Transition Metal ◽  
Electron Donor ◽  
Metal Ion ◽  
Energy And Electron Transfer ◽  
Donor Acceptor ◽  
History Of ◽  
Artificial Photosynthetic ◽  
Covalently Linked ◽  
Electron Transfer Processes

More than three decades of research efforts have yielded powerful methodologies based on transition metal template-directed syntheses for the assembly of a huge number of interlocked systems, molecular knots, machines and synthesizers. Such template techniques have been applied in the preparation of mechanically linked electron donor–acceptor artificial photosynthetic models. Consequently, synthetic challenging photoactive rotaxanes and catenanes have been reported, in which the chromophores are not covalently linked but are still associated with undergoing sequential energy (EnT) and electron transfer (ET) processes upon photoexcitation. Many interlocked photosynthetic models produce highly energetic, but still long-living charge separated states (CSS). The present work describes in a historical perspective some key advances in the field of photoactive interlocked systems assembled by transition metal template techniques, which illustrate the usefulness of rotaxanes and catenanes as molecular scaffolds to organize electron donor–acceptor groups. The effects of molecular dynamics, molecular topology, as well as the role of the transition metal ion used as template species, on the thermodynamic and kinetic parameters of the photoinduced energy and electron transfer processes in the interlocked systems are also discussed.

Fast Intramolecular Charge Transfer with a Planar Rigidized Electron Donor/Acceptor Molecule

2004 ◽  
Vol 126 (27) ◽  
pp. 8535-8539 ◽  
Author(s):  
Toshitada Yoshihara ◽  
Sergey I. Druzhinin ◽  
Klaas A. Zachariasse
Keyword(s):  
Charge Transfer ◽  
Electron Donor ◽  
Intramolecular Charge Transfer ◽  
Acceptor Molecule ◽  
Donor Acceptor

Fast Photodriven Electron Spin Coherence Transfer: A Quantum Gate Based on a Spin Exchange J-Jump

2012 ◽  
Vol 134 (30) ◽  
pp. 12430-12433 ◽  
Author(s):  
Lukáš Kobr ◽  
Daniel M. Gardner ◽  
Amanda L. Smeigh ◽  
Scott M. Dyar ◽  
Steven D. Karlen ◽  
...  
Keyword(s):  
Electron Spin ◽  
Spin Exchange ◽  
Quantum Gate ◽  
Spin Coherence ◽  
Coherence Transfer

Synthesis of meso-nitrophenylporphyrins covalently linked to a polyphenylene chain bearing methoxy groups

2000 ◽  
Vol 04 (03) ◽  
pp. 233-242 ◽  
Author(s):  
EDGARDO N. DURANTINI
Keyword(s):  
Photodynamic Therapy ◽  
Electron Donor ◽  
Phenyl Group ◽  
Amide Bond ◽  
Methoxy Groups ◽  
Phenyl Rings ◽  
Donor Acceptor ◽  
Extra Electron ◽  
Covalently Linked ◽  
Porphyrin Macrocycles

A convenient procedure for the synthesis of polyphenylene porphyrin dyads is described. The dyads consist of a meso-nitrophenylporphyrin covalently linked to a polyphenylene chain by an amide bond. The final phenyl group in the chain bears electron donor methoxy groups. The π-conjugated chain was obtained in excellent yield via a Wittig–Horner reaction, which produces a new double bond (E isomer) incorporating either — COOCH 3 or E isomer) incorporating either — CON ( OCH 3)( CH 3) functional groups. Expansion of the conjugated chain involves the reduction of these groups to aldehydes followed by a second Wittig–Horner reaction. 5-(4-Aminophenyl)-10,15,20-tris(4-nitrophenyl)porphyrin was synthesized from meso-(4-nitrophenyl)dipyrromethane. The E isomer) incorporating either — NO 2 groups in para positions of the peripheral phenyl rings give extra electron-withdrawing character to the porphyrin macrocycles. Coupling of the polyphenylene acids with aminoporphyrin results in the desired dyads. These dyads have moieties with different electron donor–acceptor properties. This present strategy may be easily used for preparation of other similar dyad derivatives. These compounds can be suitable for photodynamic therapy.

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