Synthesis, Photophysics, Electrochemistry, and Excited-State Redox Properties of Trinuclear Copper(I) Acetylides with Bis(diphenylphosphino)alkylamines and -arylamines as Bridging Ligands

1997 ◽  
Vol 16 (8) ◽  
pp. 1772-1778 ◽  
Author(s):  
Vivian Wing-Wah Yam ◽  
Wendy Kit-Mai Fung ◽  
Mei-Tak Wong
Keyword(s):  
Excited State ◽  
Redox Properties ◽  
Bridging Ligands

Photochromic and Redox Properties of Bisterpyridine Ruthenium Complexes Based on Dimethyldihydropyrene Units as Bridging Ligands

2011 ◽  
Vol 50 (21) ◽  
pp. 10581-10591 ◽  
Author(s):  
Neus Vilà ◽  
Guy Royal ◽  
Frédérique Loiseau ◽  
Alain Deronzier
Keyword(s):  
Ruthenium Complexes ◽  
Redox Properties ◽  
Bridging Ligands

scholarly journals Redox Properties of Cobalt Tetraphenyl Porphyrin Adsorbed on Semi-Conductor Oxides Studied by Photoacoustic Spectroscopy

1983 ◽  
Vol 3 (1-6) ◽  
pp. 293-305
Author(s):  
A. M. Merle ◽  
L. Brzezinski ◽  
A. Cherqaoui ◽  
C. Giannotti
Keyword(s):  
Excited State ◽  
Ground State ◽  
Photoacoustic Spectroscopy ◽  
Oxidation Potential ◽  
Redox Properties ◽  
Reduced Form ◽  
Adsorbed State ◽  
Tetraphenyl Porphyrin ◽  
Double Oxidation

Photoacoustic spectroscopy has allowed to show that physisorbed CoIITPP is ground state monooxidized into (CoIIITPP)+ when adsorbed on Nb2O5, TiO2, SrTiO3, ZnO, SnO2. A double oxidation is observed when the porphyrin is adsorbed on WO3. On the contrary when it is adsorbed on ZrO2 and SiO2, oxidation only occurs if the porphyrin has been driven by irradiation in its excited state. It remains in the reduced form when adsorbed on Ta2O5. This behavior has been correlated with the band positions of these various oxides and has allowed to roughly position the oxidation potential of CoTPP in adsorbed state ∼0.8 V higher than in solution (0.5 V/SCE or 5.3 V/vacuum) that is 4.5 V/vacuum.

Synthesis and redox properties of a phosphine-subsituted para-dioxolene and its bimetallic palladium complex

2008 ◽  
Vol 86 (10) ◽  
pp. 976-981 ◽  
Author(s):  
Sharon L Caldwell ◽  
Joe B Gilroy ◽  
Rajsapan Jain ◽  
Evan Crawford ◽  
Brian O Patrick ◽  
...  
Keyword(s):  
Palladium Complex ◽  
Electronic Spectroscopy ◽  
Chemical Oxidation ◽  
Redox Properties ◽  
Redox Activity ◽  
Redox Potentials ◽  
Cationic Complex ◽  
Bridging Ligands ◽  
Reduction Potentials ◽  
Bimetallic Palladium

Oxidation of 2,5-bis(diphenylphosphino)-1,4-hydroquinone (8) with iodobenzene diacetate produces the corresponding bis(phosphine) substituted benzoquinone (9), the first phosphine-substitued quinone. Cyclic voltammetry studies reveal that the redox functionality of the quinone unit in 9 is retained, and the reduction potentials render this compound slightly more easily reduced than the parent p-benzoquinone. Reaction of the precursor hydroquinone 8 with Pd(hfac)2 affords a binuclear complex 10 with the hydroquinonate ligand bridging two Pd(hfac) substrates. The redox activity of the bridging dioxolene ligand is retained in complex 10, although there are significant changes in the redox potentials relative to those of the free quinone 9. Chemical oxidation of 10 with AgPF6 yields a persistent cationic complex 11, which, based on EPR and electronic spectroscopy, can be formulated as containing a bridging semiquinone ligand.Key words: p-quinones, phosphines, bridging ligands, redox properties.

Pyrene Molecular Orbital Shuffle-Controlling Excited State and Redox Properties by Changing the Nature of the Frontier Orbitals

2017 ◽  
Vol 23 (53) ◽  
pp. 13164-13180 ◽  
Author(s):  
Julia Merz ◽  
Julian Fink ◽  
Alexandra Friedrich ◽  
Ivo Krummenacher ◽  
Hamad H. Al Mamari ◽  
...  
Keyword(s):  
Excited State ◽  
Molecular Orbital ◽  
Redox Properties ◽  
Frontier Orbitals

Spectroscopic and electrochemical properties of dimeric Ruthenium(II) diimine complexes and determination of their excited state redox properties

1987 ◽  
Vol 109 (9) ◽  
pp. 2691-2697 ◽  
Author(s):  
Yael Fuchs ◽  
Sonita Lofters ◽  
Thomas Dieter ◽  
Wei Shi ◽  
Robert Morgan ◽  
...  
Keyword(s):  
Excited State ◽  
Electrochemical Properties ◽  
Redox Properties ◽  
Diimine Complexes

Elucidation of Excited-State Properties of Bimetallic Ir(III)–Pt(II) Complexes with Conjugated Bridging Ligands

2018 ◽  
Vol 122 (41) ◽  
pp. 23288-23298
Author(s):  
Yang-Jin Cho ◽  
So-Yoen Kim ◽  
Hyun Wook Cha ◽  
Bong Soo Seo ◽  
Chul Hoon Kim ◽  
...  
Keyword(s):  
Excited State ◽  
Bridging Ligands

Photoinduced organic reactions by pyrene catalysts

Synthesis ◽  
2022 ◽  
Author(s):  
Akira Shiozuka ◽  
Kohei Sekine ◽  
Yoichiro Kuninobu
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Aromatic Hydrocarbons ◽  
Bond Cleavage ◽  
Redox Properties ◽  
Organic Reactions ◽  
Addition Reactions ◽  
Single Electron Transfer ◽  
Recent Developments ◽  
Polycyclic Aromatic

Pyrene is one of the most attractive polycyclic aromatic hydrocarbons (PAHs) in photochemistry. Based on their redox properties, pyrenes have potential as photosensitizers. In this review, we aim to summarize recent developments in pyrene-catalyzed photoinduced organic reactions via the process of energy transfer or single electron transfer based on the excited state of pyrenes. 1. Introduction 2. Photolysis involving N–O bond cleavage or decarboxylation 3. (Cyclo)addition reactions with styrenes 4. Transformations via cleavage of C–F, C–I, C–S, and C–N bonds 5. Reactions based on sensitization-initiated electron transfer (SenI-ET) 6. Miscellaneous transformations 7. Conclusion

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