Mechanism for energy transfer processes between Ce3+ and Tb3+ in LaPO4:Ce,Tb nanocrystals by time-resolved luminescence spectroscopy

2010 ◽  
Vol 247 (9) ◽  
pp. 2252-2257 ◽  
Author(s):  
V. Pankratov ◽  
A. I. Popov ◽  
S. A. Chernov ◽  
A. Zharkouskaya ◽  
C. Feldmann
Keyword(s):  
Energy Transfer ◽  
Luminescence Spectroscopy ◽  
Time Resolved ◽  
Transfer Processes

Energy Transfer And Emission Processes In Sol-Gel Materials Doped With Europium (III) Complexes

1993 ◽  
Vol 328 ◽  
Author(s):  
Xiao-Jun Wang ◽  
Lowell R. Matthews ◽  
E. T. Knobbet
Keyword(s):  
Energy Transfer ◽  
Sol Gel ◽  
Optical Emission ◽  
Luminescence Spectroscopy ◽  
Dynamic Processes ◽  
Time Resolved ◽  
Transfer Rates ◽  
Transfer Processes ◽  
Emission Behavior ◽  
Host Matrices

ABSTRACTOptical emission behavior in sol-gel-derived Materials doped with tris (4,4,4-trifluoro-l- (2′-thienyl) -l,3-butanedionato-O,O′)europium (III), Eu (ttfa)3, has been investigated by exciting the electronic levels of both europium (III) and the β-diketonate ligand (ttfa-). Energy transfer processes between the ttfa− ligands and europium (III) have been studied by time-resolved luminescence spectroscopy. The dynamic processes were compared in three sol-gel-derived host Matrices (silica, an acrylate ORMOSIL, and an epoxide ORMOSIL). Concentration dependence of the energy transfer rates was also studied.

scholarly journals Horizontal versus vertical charge and energy transfer in hybrid assemblies of semiconductor nanoparticles

2012 ◽  
Vol 3 ◽  
pp. 629-636 ◽  
Author(s):  
Gilad Gotesman ◽  
Rahamim Guliamov ◽  
Ron Naaman
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Horizontal Plane ◽  
Quartz Substrate ◽  
Vertical Direction ◽  
Time Resolved ◽  
Transfer Processes ◽  
Donor And Acceptor ◽  
Hybrid Assemblies ◽  
Time Resolved Photoluminescence

We studied the photoluminescence and time-resolved photoluminescence from self-assembled bilayers of donor and acceptor nanoparticles (NPs) adsorbed on a quartz substrate through organic linkers. Charge and energy transfer processes within the assemblies were investigated as a function of the length of the dithiolated linker (DT) between the donors and acceptors. We found an unusual linker-length-dependency in the emission of the donors. This dependency may be explained by charge and energy transfer processes in the vertical direction (from the donors to the acceptors) that depend strongly on charge transfer processes occurring in the horizontal plane (within the monolayer of the acceptor), namely, parallel to the substrate.

scholarly journals Picosecond Absorption Spectroscopy of Energy Transfer Processes in Polymethine Dyes

1990 ◽  
Vol 10 (3) ◽  
pp. 139-145 ◽  
Author(s):  
K. -H. Feller ◽  
R. Gadonas ◽  
V. Krasauskas
Keyword(s):  
Energy Transfer ◽  
Transient Absorption ◽  
Iron Complex ◽  
Polymethine Dyes ◽  
Acceptor Molecule ◽  
Time Resolved ◽  
Transfer Processes ◽  
Energy Donor ◽  
First Time ◽  
Polymethine Dye

Results are presented of time-resolved absorption investigations of energy transfer processes between a polymethine dye and an iron complex dye (dye E). For the first time the acceptor molecule transient absorption depletion generated by energy transfer from an excited donor was observed. The decay time of the acceptor deactivation (≈ 140 Ps) in the presence of the energy donor agrees very well with the S1-state lifetime of the energy donor.

scholarly journals Role of Auger-Type Energy Transfer Processes in Quenching of Anti-Stokes Emission in Chromium and Iron Doped ZnSe: ODMR, Optical and Time-Resolved Study

2003 ◽  
Vol 103 (6) ◽  
pp. 695-701 ◽  
Author(s):  
V.Yu. Ivanov ◽  
G. Karczewski ◽  
M. Godlewski ◽  
A.M. Omel'chuk ◽  
A.E. Belyaev ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Time Resolved ◽  
Transfer Processes ◽  
Iron Doped ◽  
Anti Stokes

Luminescent Terbium Complexes with Polymer Ligands

2004 ◽  
Vol 69 (2) ◽  
pp. 309-321 ◽  
Author(s):  
Drahomír Výprachtický ◽  
Věra Cimrová ◽  
Stanislav Kukla ◽  
Luďka Machová
Keyword(s):  
Energy Transfer ◽  
Maleic Anhydride ◽  
Diethyl Maleate ◽  
Time Resolved ◽  
Lanthanide Ion ◽  
Transfer Processes ◽  
Donor Acceptor ◽  
Complexing Properties ◽  
Terbium Complexes ◽  
Polymer Ligands

Alternating and statistical copolymers of 9-vinylcarbazole with diethyl fumarate (1), diethyl maleate (2), methacrylic acid (3), maleic anhydride (4), or maleic acid (5) were synthesized and characterized. These copolymers were tested as polymer ligands, that might be able to suppress the environmental vibronic quenching of a lanthanide ion and, simultaneously, to function as energy donors in the ligand-to-metal energy transfer processes. Time-resolved luminescence of a series of [Tb(III)-ligand] complexes in common and deuterated solvents revealed that the complexing properties of copolymers 3 or 5 are stronger than those of 1 or 2. Consequently, the strong binding affinity decreases the ligand-metal (donor-acceptor) distance and gives rise to an efficient ligand-to-metal energy transfer. Thus, the intensities of the long-lived emission (5D4→7F6, 5D4→7F5, 5D4→7F4, 5D4→7F3) of the [Tb(III)-3], [Tb(III)-5], and [Tb(III)-1] or [Tb(III)-2] complexes were found to be eight times, five times, and less than twice that of uncomplexed Tb3+, respectively.

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