Electron donor-acceptor complexes. 2. Evaluation of the criteria for ground-state stability of weak b.pi.-a.pi. complexes using semiempirical energy surfaces

1989 ◽  
Vol 93 (5) ◽  
pp. 1784-1793 ◽  
Author(s):  
William A. Glauser ◽  
Douglas J. Raber ◽  
Brian Stevens
Keyword(s):  
Electron Donor ◽  
Ground State ◽  
Donor Acceptor ◽  
Ground State Stability ◽  
Energy Surfaces

scholarly journals Inversion of donor–acceptor roles in photoinduced intervalence charge transfers

2019 ◽  
Vol 55 (53) ◽  
pp. 7659-7662 ◽  
Author(s):  
Bruno M. Aramburu-Trošelj ◽  
Paola S. Oviedo ◽  
Ivana Ramírez-Wierzbicki ◽  
Luis M. Baraldo ◽  
Alejandro Cadranel
Keyword(s):  
Electron Donor ◽  
Electron Acceptor ◽  
Ground State ◽  
Mixed Valence ◽  
Donor Acceptor

Upon MLCT photoexcitation, {(tpy)Ru} becomes the electron acceptor in the mixed valence {(tpy˙−)RuIII−δ-NC-MII+δ} moiety, reversing its role as the electron donor in the ground-state mixed valence analogue.

scholarly journals Synthetic reactions driven by electron-donor–acceptor (EDA) complexes

2021 ◽  
Vol 17 ◽  
pp. 771-799
Author(s):  
Zhonglie Yang ◽  
Yutong Liu ◽  
Kun Cao ◽  
Xiaobin Zhang ◽  
Hezhong Jiang ◽  
...  
Keyword(s):  
Electron Donor ◽  
Ground State ◽  
Transition Metal Catalysts ◽  
External Energy ◽  
The Past ◽  
Dipole Interactions ◽  
Synthetic Reactions ◽  
Donor Acceptor ◽  
External Energy Source ◽  
Eda Complex

The reversible, weak ground-state aggregate formed by dipole–dipole interactions between an electron donor and an electron acceptor is referred to as an electron-donor–acceptor (EDA) complex. Generally, upon light irradiation, the EDA complex turns into the excited state, causing an electron transfer to give radicals and to initiate subsequent reactions. Besides light as an external energy source, reactions involving the participation of EDA complexes are mild, obviating transition metal catalysts or photosensitizers in the majority of cases and are in line with the theme of green chemistry. This review discusses the synthetic reactions concerned with EDA complexes as well as the mechanisms that have been shown over the past five years.

Use of alkylated, amphiphilic zinc porphyrins to disperse individualized SWCNTs

2018 ◽  
Vol 22 (07) ◽  
pp. 573-580
Author(s):  
Peter W. Münich ◽  
Pawel Wagner ◽  
David L. Officer ◽  
Dirk M. Guldi
Keyword(s):  
Carbon Nanotubes ◽  
Excited State ◽  
Charge Transfer ◽  
Electron Donor ◽  
Ground State ◽  
Single Wall Carbon Nanotubes ◽  
Top Down ◽  
Simultaneous Reduction ◽  
Donor Acceptor ◽  
Zinc Porphyrins

A series of zinc porphyrins, namely ZnPa and ZnPb, which exist predominantly as aggregates, are utilized in a top-down preparation of individualized and stabilized single wall carbon nanotubes (SWCNTs). Sizable interactions in the ground state of the corresponding SWCNT/ZnPa and SWCNT/ZnPb electron donor–acceptor systems lead to charge transfer in the excited state. The product includes the simultaneous reduction of the electron-accepting SWCNTs and the oxidation of the electron-donating ZnPa and ZnPb.

Semiempirical characterization of substituted bis-pyrazolopyridines as new bulky electron donor–acceptor systems in their electronic ground state

1997 ◽  
Vol 419 (1-3) ◽  
pp. 63-75 ◽  
Author(s):  
Andreas B.J. Parusel ◽  
Rudolf Schamschule ◽  
Danuta Piorun ◽  
Karl Rechthaler ◽  
Agnieszka Puchała ◽  
...  
Keyword(s):  
Electron Donor ◽  
Ground State ◽  
Electronic Ground State ◽  
Donor Acceptor ◽  
Electronic Ground

Metal-Free Photoinduced Hydroalkylation Cascade Enabled by an Electron-Donor-Acceptor Complex

2020 ◽  
Author(s):  
José Tiago Menezes Correia ◽  
Gustavo Piva da Silva ◽  
Camila Menezes Kisukuri ◽  
Elias André ◽  
Bruno Pires ◽  
...  
Keyword(s):  
Electron Donor ◽  
Functional Group ◽  
Photoexcited Electron ◽  
One Pot ◽  
Quaternary Centers ◽  
Metal Free ◽  
Acceptor Complex ◽  
Catalyst Free ◽  
Donor Acceptor ◽  
Radical Cascade

A metal- and catalyst-free photoinduced radical cascade hydroalkylation of 1,7-enynes has been disclosed. The process is triggered by a SET event involving a photoexcited electron-donor-aceptor complex between NHPI ester and Hantzsch ester, which decomposes to afford a tertiary radical that is readily trapped by the enyne. <a>The method provides an operationally simple, robust and step-economical approach to the construction of diversely functionalized dihydroquinolinones bearing quaternary-centers. A sequential one-pot hydroalkylation-isomerization approach is also allowed giving access to a family of quinolinones. A wide substrate scope and high functional group tolerance was observed in both approaches</a>.

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