Time-resolved femtosecond laser desorption from wide-bandgap single crystals

2002 ◽  
Author(s):  
Wayne P. Hess ◽  
Alan G. Joly ◽  
Kenneth M. Beck ◽  
J. Thomas Dickinson
Keyword(s):  
Femtosecond Laser ◽  
Single Crystals ◽  
Laser Desorption ◽  
Wide Bandgap ◽  
Time Resolved

scholarly journals Synthesis and Photobehavior of a NewDehydrobenzoannulene-Based HOF with Fluorine Atoms: From Solution to Single Crystals Observation

2021 ◽  
Vol 22 (9) ◽  
pp. 4803
Author(s):  
Eduardo Gomez ◽  
Ichiro Hisaki ◽  
Abderrazzak Douhal
Keyword(s):  
Charge Transfer ◽  
Single Crystals ◽  
Parent Compound ◽  
Time Resolved ◽  
Strong Basis ◽  
Triplet Structure ◽  
Carboxylic Groups ◽  
Potential Applications ◽  
A Charge ◽  
Further Development

Hydrogen-bonded organic frameworks (HOFs) are the focus of intense scientific research due their potential applications in science and technology. Here, we report on the synthesis, characterization, and photobehavior of a new HOF (T12F-1(124TCB)) based on a dehydrobenzoannulene derivative containing fluorine atoms (T12F-COOH). This HOF exhibits a 2D porous sheet, which is hexagonally networked via H-bonds between the carboxylic groups, and has an interlayers distance (4.3 Å) that is longer than that of a typical π–π interaction. The presence of the fluorine atoms in the DBA molecular units largely increases the emission quantum yield in DMF (0.33, T12F-COOH) when compared to the parent compound (0.02, T12-COOH). The time-resolved dynamics of T12F-COOH in DMF is governed by the emission from a locally excited state (S1, ~ 0.4 ns), a charge-transfer state (S1(CT), ~ 2 ns), and a room temperature emissive triplet state (T1, ~ 20 ns), in addition to a non-emissive triplet structure with a charge-transfer character (T1(CT), τ = 0.75 µs). We also report on the results using T12F-ester. Interestingly, FLIM experiments on single crystals unravel that the emission lifetimes of the crystalline HOF are almost twice those of the amorphous ones or the solid T12F-ester sample. This shows the relevance of the H-bonds in the photodynamics of the HOF and provides a strong basis for further development and study of HOFs based on DBAs for potential applications in photonics.

scholarly journals Bent crystal x-ray mirrors for time-resolved experiments with femtosecond laser-produced x-ray pulses

2005 ◽  
Vol 21 ◽  
pp. 207-210 ◽  
Author(s):  
M Nicoul ◽  
U Shymanovich ◽  
S Kähle ◽  
T Caughey ◽  
D Sampat ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Time Resolved ◽  
X Ray ◽  
Bent Crystal

Ultrafast Space-time and Spectrum-time Resolved Diagnostics of Multicharged Femtosecond Laser Microplasma

2009 ◽  
Author(s):  
S. V. Garnov ◽  
V. V. Bukin ◽  
A. A. Malyutin ◽  
V. V. Strelkov ◽  
Paul R. Bolton ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Space Time ◽  
Time Resolved

Laser Desorption and Imaging of Proteins from Ice via UV Femtosecond Laser Pulses

2003 ◽  
Vol 75 (19) ◽  
pp. 5146-5151 ◽  
Author(s):  
Jamal I. Berry ◽  
Shixin Sun ◽  
Yusheng Dou ◽  
Andreas Wucher ◽  
Nicholas Winograd
Keyword(s):  
Femtosecond Laser ◽  
Laser Desorption ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

Time-resolved microscopy of femtosecond laser filaments in fused quartz

2021 ◽  
pp. 127497
Author(s):  
Viktor Kadan ◽  
Ivan Blonskyi ◽  
Ihor Pavlov
Keyword(s):  
Femtosecond Laser ◽  
Time Resolved ◽  
Fused Quartz
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