scholarly journals Energy Transfer Pathways in Dinuclear Heteroleptic Polypyridyl Complexes:  Through-Space vs Through-Bond Interaction Mechanisms

2004 ◽  
Vol 43 (14) ◽  
pp. 4471-4481 ◽  
Author(s):  
Frances Weldon ◽  
Leif Hammarström ◽  
Emad Mukhtar ◽  
Ronald Hage ◽  
Eric Gunneweg ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Polypyridyl Complexes ◽  
Interaction Mechanisms ◽  
Bond Interaction

Intrastrand electron and energy transfer between polypyridyl complexes on a soluble polymer

1993 ◽  
Vol 115 (16) ◽  
pp. 7363-7373 ◽  
Author(s):  
Wayne E. Jones ◽  
Steven M. Baxter ◽  
Geoffrey F. Strouse ◽  
Thomas J. Meyer
Keyword(s):  
Energy Transfer ◽  
Soluble Polymer ◽  
Polypyridyl Complexes

scholarly journals Energy Transfer in Rigidly-Linked Heterodinuclear Ru(II)/Fe(II) Polypyridyl Complexes:  Distance and Linkage DependenceJ.Am.Chem.Soc.1995,117, 5881−5882

1997 ◽  
Vol 119 (41) ◽  
pp. 9937-9937
Author(s):  
S. L. Larson ◽  
S. M. Hendrickson ◽  
S. Ferrere ◽  
D. L. Derr ◽  
C. Michael Elliott
Keyword(s):  
Energy Transfer ◽  
Polypyridyl Complexes

scholarly journals Photoinduced energy-transfer in covalently and non-covalently linked supramolecular arrays of metal polypyridyl complexes

1999 ◽  
Vol 1 (2) ◽  
pp. 121-133 ◽  
Author(s):  
Michael D. Ward
Keyword(s):  
Energy Transfer ◽  
Binding Sites ◽  
Pair Formation ◽  
Antenna Effect ◽  
Polypyridyl Complexes ◽  
Bridging Ligand ◽  
Close Proximity ◽  
Photophysical Studies ◽  
Covalently Linked ◽  
Adenine Thymine

Photoinduced energy-transfer has been studied between the component parts of two types of multichromophoric array. In the first type the components (metal polypyridyl complexes) are covalently linked by using the bridging ligand2,2′:3′,2″:6″,2′″-quaterpyridine, which has two inequivalent bipyridyl chelating sites in close proximity. Structural, redox and photophysical studies of the complexes based on this ligand show how the properties of each metal fragment vary between the two inequivalent binding sites, and show also how efficient inter-component energy transfer can occur between components, with an example of the antenna effect being demonstrated by energy transfer from three peripheral{Re(bipy)(CO)3CL}fragments to one central{Ru(bipy)3}2+fragment. In the second type of supramolecular array, the mononuclear complex component parts are held together by hydrogen-bonding between peripheral adenine, thymine, cytosine or guanine nucleobase groups. Thus a{Ru(bipy)3}2+derivative with a pendant cytosine group strongly associates inCH2CL2solution with an{Os(bipy)3}2+complex bearing a pendant guanine group, by Watson-Crick base-pair formation(Ka≈5000M-1), andRu→Osphotoinduced energy-transfer can occur across the triple hydrogen-bonded bridge.

scholarly journals Controlling the Optical and Catalytic Properties of Artificial Metalloenzyme Photocatalysts Using Chemogenetic Engineering

2022 ◽  
Author(s):  
Yasmine S Zubi ◽  
Bingqing Liu ◽  
Yifan Gu ◽  
Dipankar Sahoo ◽  
Jared C Lewis
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Catalytic Properties ◽  
Single Electron ◽  
Visible Light Photocatalysis ◽  
Organic Transformations ◽  
Polypyridyl Complexes ◽  
Artificial Metalloenzyme

Visible light photocatalysis enables a broad range of organic transformations that proceed via single electron or energy transfer. Metal polypyridyl complexes are among the most commonly employed visible light photocatalysts....

Energy Transfer from Luminescent Porous Silicon to Adsorbed Osmium(II) and Ruthenium(II) Polypyridyl Complexes

1998 ◽  
Vol 102 (13) ◽  
pp. 2383-2390 ◽  
Author(s):  
Durwin R. Striplin ◽  
Craig G. Wall ◽  
Bruce W. Erickson ◽  
Thomas J. Meyer
Keyword(s):  
Energy Transfer ◽  
Porous Silicon ◽  
Polypyridyl Complexes

scholarly journals Controlling the Optical and Catalytic Properties of Artificial Metalloenzyme Photocatalysts Using Chemogenetic Engineering

2021 ◽  
Author(s):  
Yasmine S. Zubi ◽  
Bingqing Liu ◽  
Yifan Gu ◽  
Dipankar Sahoo ◽  
Jared Lewis
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Catalytic Properties ◽  
Photophysical Properties ◽  
Organic Transformations ◽  
Polypyridyl Complexes ◽  
Transfer Processes ◽  
Pyridine Ligands ◽  
Artificial Metalloenzymes ◽  
Artificial Metalloenzyme

Visible light photocatalysis enables a broad range of organic transformations that proceed via single electron or energy transfer. Metal polypyridyl complexes are among the most commonly employed visible light photocatalysts. The photophysical properties of these complexes have been extensively studied and can be tuned by modifying the substituents on the pyridine ligands. On the other hand, ligand modifications that enable substrate binding to control reaction selectivity remain rare. Given the exquisite control that enzymes exert over electron and energy transfer processes in nature, we envisioned that artificial metalloenzymes (ArMs) created by incorporating Ru(II) polypyridyl complexes into a suitable protein scaffold could provide a means to control photocatalyst properties. This study describes approaches to create covalent and non-covalent ArMs from a variety of Ru(II) polypyridyl cofactors and a prolyl oligopeptidase scaffold. A panel of ArMs with enhanced photophysical properties were engineered, and the nature of the scaffold/cofactor interactions in these systems was investigated. These ArMs provided higher yields and rates than Ru(Bpy)32+ for the reductive cyclization of dienones and the [2+2] photocycloaddition between C-cinnamoyl imidazole and 4-methoxystyrene, suggesting that protein scaffolds could provide a means to improve the efficiency of visible light photocatalysts.

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