Exciton Dissociation and Electron Transfer at a Well-Defined Organic Interface of an Epitaxial C60 Layer on a Pentacene Single Crystal

2020 ◽  
Vol 124 (25) ◽  
pp. 13572-13579
Author(s):  
Masato Iwasawa ◽  
Ryohei Tsuruta ◽  
Yasuo Nakayama ◽  
Masahiro Sasaki ◽  
Takuya Hosokai ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Single Crystal ◽  
Exciton Dissociation

Surface polaron states on single-crystal rutile TiO2 nanorod arrays enhancing charge separation and transfer

2020 ◽  
Vol 49 (42) ◽  
pp. 15054-15060
Author(s):  
Qimeng Yang ◽  
Heng Zhu ◽  
Yanghui Hou ◽  
Duanduan Liu ◽  
Huang Tang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Single Crystal ◽  
Charge Separation ◽  
Nanorod Arrays ◽  
Rutile Tio2 ◽  
Electron Transfer Pathway ◽  
Tio2 Nanorod ◽  
Electrolyte Interface ◽  
Tio2 Nanorod Arrays

Polaron states on single-crystal TiO2 photoanodes provide an important electron transfer pathway at the electrode–electrolyte interface.

scholarly journals Observation of counterion effects and dimensionality reduction in single-crystal (EDO-TTF)2SbF6 with ultrafast electron diffraction

2019 ◽  
Vol 205 ◽  
pp. 04007
Author(s):  
Lai Chung Liu ◽  
Yifeng Jiang ◽  
Henrike M. Mueller-Werkmeister ◽  
Cheng Lu ◽  
Gustavo Moriena ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Diffraction ◽  
Dimensionality Reduction ◽  
Single Crystal ◽  
Structural Dynamics ◽  
Dominant Role ◽  
Ultrafast Electron Diffraction ◽  
Femtosecond Electron Diffraction ◽  
Lower Dimensional

Femtosecond electron diffraction is used to resolve structural dynamics in single-crystal (EDO-TTF)2XF6 (X = P, Sb). The retarded and lower-dimensional dynamics of the latter illustrate the dominant role of counterion motion in stabilizing electron transfer.

scholarly journals Towards triptycene functionalization and triptycene-linked porphyrin arrays

2020 ◽  
Vol 16 ◽  
pp. 763-777
Author(s):  
Gemma M Locke ◽  
Keith J Flanagan ◽  
Mathias O Senge
Keyword(s):  
Electron Transfer ◽  
Single Crystal ◽  
Cross Coupling ◽  
X Ray ◽  
Fluorescence Studies ◽  
Coupling Conditions ◽  
Porphyrin Dimer

Herein, 9,10-diethynyltriptycene is investigated for its use as a rigid isolating unit in the synthesis of multichromophoric arrays. Sonogashira cross-coupling conditions are utilized to attach various porphyrins and boron dipyrromethenes (BODIPYs) to the triptycene scaffold. While there are previous examples of triptycene porphyrin complexes, this work reports the first example of a linearly connected porphyrin dimer, linked through the bridgehead carbons of triptycene. Symmetric and unsymmetric examples of these complexes are demonstrated and single crystal X-ray analysis of an unsymmetrically substituted porphyrin dimer highlights the evident linearity in these systems. Moreover, initial UV–vis and fluorescence studies show the promise of triptycene as a linker for electron transfer studies, showcasing its isolating nature.

scholarly journals Synthesis, Spectroscopy and Electrochemistry in Relation to DFT Computed Energies of Ferrocene- and Ruthenocene-Containing -Diketonato Iridium(III) Heteroleptic Complexes. Structure of [(2-Pyridylphenyl)2Ir(RcCOCHCOCH3]

Molecules ◽  
2019 ◽  
Vol 24 (21) ◽  
pp. 3923 ◽  
Author(s):  
Buitendach ◽  
Conradie ◽  
Malan ◽  
Niemantsverdriet ◽  
Swarts
Keyword(s):  
Crystal Structure ◽  
Electron Transfer ◽  
Single Crystal ◽  
Molecular Orbital ◽  
Reduction Potential ◽  
Redox Couple ◽  
Heteroleptic Complexes ◽  
Highest Occupied Molecular Orbital ◽  
Accuracy Level ◽  
Voltammetric Studies

A series of new ferrocene- and ruthenocene-containing iridium(III) heteroleptic complexes of the type [(ppy)2Ir(RCOCHCOR′)], with ppy = 2-pyridylphenyl, R = Fc = FeII(η5-C5H4)(η5-C5H5) and R′ = CH3 (1) or Fc (2), as well as R = Rc = RuII(η5-C5H4)(η5-C5H5) and R′ = CH3 (3), Rc (4) or Fc (5) was synthesized via the reaction of appropriate metallocene-containing β-diketonato ligands with [(ppy)2(-Cl)Ir]2. The single crystal structure of 3 (monoclinic, P21/n, Z = 4) is described. Complexes 1–5 absorb light strongly in the region 280−480 nm the metallocenyl -diketonato substituents quench phosphorescence in 1–5. Cyclic and square wave voltammetric studies in CH2Cl2/[N(nBu)4][B(C6F5)4] allowed observation of a reversible IrIII/IV redox couple as well as well-resolved ferrocenyl (Fc) and ruthenocenyl (Rc) one-electron transfer steps in 1−5. The sequence of redox events is in the order Fc oxidation, then IrIII oxidation and finally ruthenocene oxidation, all in one-electron transfer steps. Generation of IrIV quenched phosphorescence in 6, [(ppy)2Ir(H3CCOCHCOCH3)]. This study made it possible to predict the IrIII/IV formal reduction potential from Gordy scale group electronegativities, χR and/or ΣχR′ of -diketonato pendent side groups as well as from DFT-calculated energies of the highest occupied molecular orbital of the species involved in the IrIII/IV oxidation at a 98 % accuracy level.

Critical Electron Transfer Rates for Exciton Dissociation Governed by Extent of Crystallinity in Small Molecule Organic Photovoltaics

2014 ◽  
Vol 118 (27) ◽  
pp. 14840-14847 ◽  
Author(s):  
Susan Spencer ◽  
Jeremy Cody ◽  
Scott Misture ◽  
Brandon Cona ◽  
Patrick Heaphy ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Small Molecule ◽  
Organic Photovoltaics ◽  
Exciton Dissociation ◽  
Transfer Rates

ChemInform Abstract: ELECTRON-TRANSFER TRANSITIONS IN HEXACHLOROFERRATE(III). SINGLE-CRYSTAL ABSORPTION AND MCD SPECTRA

1983 ◽  
Vol 14 (36) ◽  
Author(s):  
K. NEUENSCHWANDER ◽  
H. U. GUEDEL ◽  
J. C. COLLINGWOOD ◽  
P. N. SCHATZ
Keyword(s):  
Electron Transfer ◽  
Single Crystal
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