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.

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

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.

Study on the energy transfer between UO2+2 and Eu3+ in sol-gel derived titania matrix by luminescence spectroscopy

2010 ◽  
Vol 17 (2) ◽  
pp. 132-136 ◽  
Author(s):  
Lan-She Fu ◽  
Hong-Jie Zhang ◽  
Shu-Bin Wang ◽  
Qing-Guo Meng ◽  
Kui-Yue Yang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Sol Gel ◽  
Luminescence Spectroscopy

Chromophore Dynamics in Sol-Gel Glasses and Xerogel Clad Fiber Optic Sensors

1994 ◽  
Vol 346 ◽  
Author(s):  
Drew L'Esperance ◽  
Clarice A. Browne ◽  
Eric L. Chronister
Keyword(s):  
Energy Transfer ◽  
Fiber Optic ◽  
Rotational Diffusion ◽  
Sol Gel ◽  
Fiber Optic Sensors ◽  
Fiber Optic Sensor ◽  
Time Resolved ◽  
Optic Sensor ◽  
Sensor Device ◽  
Gel Glasses

ABSTRACTTime-resolved depolarization measurements are used to investigate rotational diffusion and optical energy transfer dynamics of chromophores incorporated into silica and aluminosilica solutions, gels, and glasses. The use of an organically doped sol-gel clad waveguide as a novel intrinsic fiber optic sensor device is also demonstrated, and advantages of time-resolved detection of the fiber optic sensor are illustrated.

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