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Search for "reduction potential" in Full Text gives 83 result(s) in Beilstein Journal of Organic Chemistry.

Photoinduced electron-transfer chemistry of the bielectrophoric N-phthaloyl derivatives of the amino acids tyrosine, histidine and tryptophan

  • Axel G. Griesbeck,
  • Jörg Neudörfl and
  • Alan de Kiff

Beilstein J. Org. Chem. 2011, 7, 518–524, doi:10.3762/bjoc.7.60

Graphical Abstract
  • and ФISC < 0.01 for N-arylphthalimides [1]. If necessary, the population of the triplet state is also possible by sensitization, e.g., with triplet sensitizers such as acetone or benzophenone. With a triplet energy ET of 293–300 kJ mol−1 and a ground-state reduction potential E0 of −1.85 V vs Fc/Fc
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Published 26 Apr 2011

Aromatic and heterocyclic perfluoroalkyl sulfides. Methods of preparation

  • Vladimir N. Boiko

Beilstein J. Org. Chem. 2010, 6, 880–921, doi:10.3762/bjoc.6.88

Graphical Abstract
  • containing products of mono- and di-substitution. Their lower reactivity [88] is largely due to the greater dissociation energy of the C–Br bond (55 kcal/mol for CF3Br) compared to C–I (28 kcal/mol for CF3I) [172]. In addition, CF3Br has a higher reduction potential than CF3I and prefers to receive two
  • of CF3Br as compared to CF3I can be explained, first of all, by the higher reduction potential (−2.07 V against −1.52 V for CF3I on a glass-carbon cathode), and secondly, by the fact that the CF3• radical has a reduction potential (−1.80 V) close to that of CF3Br [173]. Thus trifluoromethyl bromide
  • ]. Electrochemical studies involving the SO2−• radical anion prove that the electron transfer to CF3Br takes place at a reduction potential of the mediator between −0.9 and −1.0 V which prevents the transfer of a second electron to CF3• and the generation of CF3− [199]. Therefore electrochemical reduction in the
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Review
Published 18 Aug 2010

Synthetic incorporation of Nile Blue into DNA using 2′-deoxyriboside substitutes: Representative comparison of (R)- and (S)-aminopropanediol as an acyclic linker

  • Daniel Lachmann,
  • Sina Berndl,
  • Otto S. Wolfbeis and
  • Hans-Achim Wagenknecht

Beilstein J. Org. Chem. 2010, 6, No. 13, doi:10.3762/bjoc.6.13

Graphical Abstract
  • , DNA2C), or both (DNA2G). It becomes clear from a rough estimation of the excited state potential for the Nile Blue dye that guanine oxidation by an photoinduced electron transfer causes the fluorescence quenching. If the singlet–singlet transition energy E00 = 1.9 eV is added to the reduction potential
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Published 09 Feb 2010

Prediction of reduction potentials from calculated electron affinities for metal-salen compounds

  • Sarah B. Bateni,
  • Kellie R. England,
  • Anthony T. Galatti,
  • Handeep Kaur,
  • Victor A. Mendiola,
  • Alexander R. Mitchell,
  • Michael H. Vu,
  • Benjamin F. Gherman and
  • James A. Miranda

Beilstein J. Org. Chem. 2009, 5, No. 82, doi:10.3762/bjoc.5.82

Graphical Abstract
  • could be used to predict the reduction potentials of a variety of metal-salen compounds, an important class of coordination compounds used in synthetic organic electrochemistry as electrocatalysts. Keywords: density functional theory; electron affinity; metal-salen; reduction potential; Introduction
  • evidence for the formation of a Ni(II)-salen radical anion during electrolysis was later put forth by Peters and co-workers [6]. In mediated ERC, while Ni(II)-salen (reduction potential or Epc = −2.1 V vs. Ag/AgNO3) is an effective electrochemical mediator, the analogous Co(II)-salen (Epc = −1.6 V vs. Ag
  • /AgNO3) fails to promote cyclization. Direct ERC (unmediated) occurs at a reduction potential of −2.7 V vs. Ag/AgNO3. It was concluded that the 1.1 V thermodynamic barrier was too large to allow electron transfer to occur from the reduced form of the Co(II)-salen to the substrate [4]. We sought to
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Preliminary Communication
Published 23 Dec 2009

New diarylmethanofullerene derivatives and their properties for organic thin- film solar cells

  • Daisuke Sukeguchi,
  • Surya Prakash Singh,
  • Mamidi Ramesh Reddy,
  • Hideyuki Yoshiyama,
  • Rakesh A. Afre,
  • Yasuhiko Hayashi,
  • Hiroki Inukai,
  • Tetsuo Soga,
  • Shuichi Nakamura,
  • Norio Shibata and
  • Takeshi Toru

Beilstein J. Org. Chem. 2009, 5, No. 7, doi:10.3762/bjoc.5.7

Graphical Abstract
  • [19]. These first reduction potential data showed that the diarylmethanofullerene derivatives can be a better electron acceptor than PCBM [27]. Photovoltaic Devices A series of solar cells was fabricated with P3HT as the electron-donor and diarylmethanofullerene derivatives as the electron-acceptor
  • the higher Voc value [20][27][29][30][31]. More negative first reduction potentials of the methoxy-substituted PCBM derivatives in comparison with that of PCBM have been shown to be well correlated to the Voc values of the solar cells [20]. On the other hand, the first reduction potential of 1a is
  • less negative than that of PCBM (Table 1). In addition, a higher Voc value was shown for the P3HT-1a cell. The tris(octyloxy)phenyl- and (octyloxy)phenyl-substituted methanofullerenes 1b and 1c with less negative first reduction potential also showed enhanced Voc values. The electron-donating (octyloxy
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Published 24 Feb 2009

Synthesis and redox behavior of new ferrocene- π-extended- dithiafulvalenes: An approach for anticipated organic conductors

  • Abdelwareth A. O. Sarhan,
  • Omar F. Mohammed and
  • Taeko Izumi

Beilstein J. Org. Chem. 2009, 5, No. 6, doi:10.3762/bjoc.5.6

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  • cyclic voltammetry at ambient temperature on a Pt working electrode, using TBAP as the supporting electrolyte. The CV exhibited good donor properties, showing a one-electron quasireversible oxidation potential. The oxidation potential values, and to a larger extent the reduction potential values, are
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Published 19 Feb 2009

Reduction of arenediazonium salts by tetrakis(dimethylamino)ethylene (TDAE): Efficient formation of products derived from aryl radicals

  • Mohan Mahesh,
  • John A. Murphy,
  • Franck LeStrat and
  • Hans Peter Wessel

Beilstein J. Org. Chem. 2009, 5, No. 1, doi:10.3762/bjoc.5.1

Graphical Abstract
  • reaction; would the analogous chemistry be seen with TDAE where no sulfur atoms are present? The experiments were of heightened interest because of the recent report by Andrieux and Pinson [60] on the standard reduction potential of the phenyl radical (formed by electrochemical reduction of the
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Published 12 Jan 2009

Effect of transannular interaction on the redox- potentials in a series of bicyclic quinones

  • Grigoriy Sereda,
  • Jesse Van Heukelom,
  • Miles Koppang,
  • Sudha Ramreddy and
  • Nicole Collins

Beilstein J. Org. Chem. 2006, 2, No. 26, doi:10.1186/1860-5397-2-26

Graphical Abstract
  • activity. However, attempts to directly relate the reduction potentials of substituted triptycene-quinones to the electronic effects of substituents are often unsuccessful. Thus, the negative shift of the reduction potential, caused by two methoxy-groups at the 5,8-positions (compound 2), was surprisingly
  • difference may fall below the threshold that would warrant sufficient concentrations of the conformation B to account for the experimental redox-potential of 2. Yamamura and co-authors [3] also noticed that the reduction potential of the quinone 2 was higher than expected from the electronic effects of the
  • (Epox) where (Eo' = 1/2(Epred + Epox) [11]. In order to check our process, we measured the first reduction potential of p-benzoquinone to be -0.507 V, which is exactly the same as the value reported in the literature [3]. The cyclic voltammograms (CV) for p-benzoquinone and the quinone 3 are presented
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Published 08 Dec 2006
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