Manipulating triplet states: tuning energies, absorption, lifetimes, and annihilation rates in anthanthrene derivatives

2018 ◽  
Vol 20 (45) ◽  
pp. 28412-28418 ◽  
Author(s):  
David J. Stewart ◽  
Jianmin Shi ◽  
Tristan R. Naranjo ◽  
Tod A. Grusenmeyer ◽  
Jacob M. Artz ◽  
...  
Keyword(s):  
Excited State ◽  
Rate Constants ◽  
Excited State Absorption ◽  
Annihilation Rate ◽  
Triplet States ◽  
Structural Modifications ◽  
Triplet Triplet Annihilation

Excited-state absorption, triplet lifetimes, and triplet–triplet annihilation rate constants can be tuned by structural modifications.

Excited State Absorption in Dendrimers Incorporating Diphenylaminodiphenylpolyene Moieties Via Photo-Induced Electron Transfer

1999 ◽  
Vol 597 ◽  
Author(s):  
W. Sonnenberg ◽  
A Hyfield ◽  
K Short ◽  
L. Spangler ◽  
C. Spangler
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Excited States ◽  
Cross Sections ◽  
Excited State Absorption ◽  
Optical Power ◽  
Triplet States ◽  
New Material ◽  
Photo Induced Electron Transfer ◽  
Optical Power Limiting

AbstractDuring the past decade there has been considerable progress in the design of new organic materials for optical power limiting (OPL) applications. Among the more promising of the new material approaches are reverse saturable absorbers (RSAs) which derive their optical limiting capability from the photogeneration of highly absorbing transient excited states. Most of the previous research in this field has focused on excited state absorption from singlet or triplet states whose cross-sections are greater than the original S0 – S1 transition- However, other transient states, such as polaronic radical ions or bipolaronic diions, formed by photo-induced electron transfer, are attractive alternatives. We have initiated studies to determine if these transient charge states can be photo-generated efficiently, and if their excited states absorption and lifetimes are acceptable for current optical power limiting requirements.

Excited State Absorption in Cubane-Like Transition Metal Clusters

1994 ◽  
Vol 374 ◽  
Author(s):  
W. Ji ◽  
H. J. Du ◽  
S. Shi
Keyword(s):  
Excited State ◽  
Transition Metal ◽  
Metal Clusters ◽  
Excited State Absorption ◽  
Laser Pulses ◽  
Cluster Compounds ◽  
Triplet States ◽  
Transition Metal Clusters ◽  
Time Resolved ◽  
Singlet States

AbstractWe report an investigation of excited-state absorption in cubane-like transition metal clusters. The fluence-dependent transmittances of the clusters have been measured with using 8-ns laser pulses. Time-resolved transmission measurements show that the triplet-triplet absorption occurs within a few nanoseconds. We have also developed a five-level (two singlet states, two triplet states, and one ionized state) model to simulate the excited-state absorption in these cluster compounds. The comparison between the model and the experimental measurements indicates that the population of the triplet states is created mainly by an ionization-recombination process and the triplet-triplet transitions are responsible for the observed nonlinear absorption.

Controlling the triplet states and their application in external stimuli-responsive triplet–triplet-annihilation photon upconversion: from the perspective of excited state photochemistry

2021 ◽  
Author(s):  
Xiao Xiao ◽  
Wen Tian ◽  
Muhammad Imran ◽  
Huaiman Cao ◽  
Jianzhang Zhao
Keyword(s):  
Excited State ◽  
Triplet States ◽  
Stimuli Responsive ◽  
External Stimuli ◽  
Annihilation Photon ◽  
Triplet Triplet Annihilation

Strategies for controlling the triplet states using chemical/physical inputs to achieve external stimuli-switchable triplet–triplet-annihilation upconversion (TTA UC).

scholarly journals Realizing Near‐Infrared Laser Dyes through a Shift in Excited‐State Absorption

2021 ◽  
pp. 2001947
Author(s):  
Reiko Aoki ◽  
Ryutaro Komatsu ◽  
Kenichi Goushi ◽  
Masashi Mamada ◽  
Soo Young Ko ◽  
...  
Keyword(s):  
Excited State ◽  
Near Infrared ◽  
Excited State Absorption ◽  
Infrared Laser ◽  
Laser Dyes

Excited state absorption and stimulated emission of Nd 3+ in crystals III: LaSc 3 (BO 3 ) 4 , CaWO 4 , and YLiF 4

1999 ◽  
Vol 68 (1) ◽  
pp. 67-72 ◽  
Author(s):  
L. Fornasiero ◽  
T. Kellner ◽  
S. Kück ◽  
J.P. Meyn ◽  
P.E.-A. Möbert ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Stimulated Emission
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