scholarly journals Energy transfer and formation of long-lived 3MLCT states in multimetallic complexes with extended highly conjugated bis-terpyridyl ligands

2016 ◽  
Vol 18 (4) ◽  
pp. 2350-2360 ◽  
Author(s):  
Maria Wächtler ◽  
Joachim Kübel ◽  
Kevin Barthelmes ◽  
Andreas Winter ◽  
Alexander Schmiedel ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excited States ◽  
Efficient Energy Transfer ◽  
Efficient Energy

Multimetallic complexes with extended conjugated ligands show efficient energy transfer to the lowest excited states and prolonged Fe(ii) 3MLCT lifetimes.

Photoswitchable Sensitization of Porphyrin Excited States

2006 ◽  
Vol 59 (3) ◽  
pp. 170 ◽  
Author(s):  
Stephen D. Straight ◽  
Yuichi Terazono ◽  
Gerdenis Kodis ◽  
Thomas A. Moore ◽  
Ana L. Moore ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excited States ◽  
Singlet State ◽  
Molecular Switches ◽  
Cyclic Form ◽  
Excited Singlet ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
Covalently Linked

Light-driven molecular switches consisting of a porphyrin covalently linked to a fulgimide photochrome antenna have been prepared. Light absorbed by the cyclic form of the fulgimide is transferred to the porphyrin with ≥ 95% efficiency, generating the porphyrin first excited singlet state. Irradiation with visible light photoisomerizes the fulgimide to the open form, which does not absorb above 450 nm, and antenna function is abolished. UV irradiation converts the fulgimide back into the cyclic form, re-establishing efficient energy transfer. Photoisomerization of the fulgimide thus controls generation of the porphyrin excited state, which may then be used to carry out a variety of useful photochemical processes.

Efficient artificial light-harvesting systems based on aggregation-induced emission constructed in supramolecular gels

Soft Matter ◽  
2021 ◽  
Author(s):  
Xinxian Ma ◽  
bo qiao ◽  
Jinlong Yue ◽  
JingJing Yu ◽  
yutao geng ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Light Harvesting ◽  
Artificial Light ◽  
Efficient Energy Transfer ◽  
Aggregation Induced Emission ◽  
Efficient Energy ◽  
Harvesting Systems ◽  
Acyl Hydrazone

Based on a new designed acyl hydrazone gelator (G2), we developed an efficient energy transfer supramolecular organogel in glycol with two different hydrophobic fluorescent dyes rhodamine B (RhB) and acridine...

Efficient Energy Transfer in Mixed Columnar Stacks of Hydrogen-Bonded Oligo(p-phenylene vinylene)s in Solution

2004 ◽  
Vol 43 (15) ◽  
pp. 1976-1979 ◽  
Author(s):  
Freek J. M. Hoeben ◽  
Laura M. Herz ◽  
Clément Daniel ◽  
Pascal Jonkheijm ◽  
Albertus P. H. J. Schenning ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Phenylene Vinylene ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
Hydrogen Bonded

Hybrid organic/inorganic semiconductor nanostructures with highly efficient energy transfer

2012 ◽  
Vol 22 (21) ◽  
pp. 10816 ◽  
Author(s):  
Diana Savateeva ◽  
Dzmitry Melnikau ◽  
Vladimir Lesnyak ◽  
Nikolai Gaponik ◽  
Yury P. Rakovich
Keyword(s):  
Energy Transfer ◽  
Semiconductor Nanostructures ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
Highly Efficient ◽  
Inorganic Semiconductor

Photochemistry of Anthracene-Appended Cobalt(III) Cyclam Complexes

2008 ◽  
Vol 61 (8) ◽  
pp. 585 ◽  
Author(s):  
Simon Boyd ◽  
Kenneth P. Ghiggino ◽  
W. David McFadyen
Keyword(s):  
Energy Transfer ◽  
Ligand Exchange ◽  
Large Excess ◽  
Release Process ◽  
Efficient Energy Transfer ◽  
Ligand Exchange Reaction ◽  
Efficient Energy ◽  
Exchange Processes ◽  
Cyclam Complexes ◽  
In Cis

The photochemistry of two anthracene-appended cobalt(iii) cyclam complexes is explored with a view to demonstrate a photoactivated ligand release process. The ligand exchange processes that occur in the complexes cis-[CoL(NO2)(ONO)]+ and trans-[CoL(NO2)(ONO)]+ in which L = 6-(anthracen-9-ylmethyl)-1,4,8,11-tetraazacyclotetradecane were monitored upon illumination of the anthracenyl chromophore at 360 nm in the presence of a large excess of thiocyanate. The trans-[CoL(NO2)(ONO)]+ complex underwent a ligand exchange reaction in the absence of light and displayed an enhancement of the reaction upon illumination. In contrast the cis-[CoL(NO2)(ONO)]+ complex was stable in the dark but displayed a significant quantum yield of photoactivated ligand release (Φ = 0.19). It is proposed that in cis-[CoL(NO2)(ONO)]+ the photoexcited anthracenyl chromophore undergoes efficient energy transfer to the cobalt(iii) cyclam before ligand exchange. Complexes based on the anthracenylcyclam–cobalt(iii) framework may be potentially useful candidates as photoactivated ligand release systems.

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