Excited-state decay of hydrocarbon radicals, investigated by femtosecond time-resolved photoionization: Ethyl, propargyl, and benzyl

2005 ◽  
Vol 122 (9) ◽  
pp. 094302 ◽  
Author(s):  
Matthias Zierhut ◽  
Bastian Noller ◽  
Thomas Schultz ◽  
Ingo Fischer
Keyword(s):  
Excited State ◽  
Time Resolved ◽  
State Decay ◽  
Hydrocarbon Radicals

Characterization of Rhodamine 6G-Doped Thin Sol-Gel Films

1993 ◽  
Vol 47 (2) ◽  
pp. 229-234 ◽  
Author(s):  
Upvan Narang ◽  
Frank V. Bright ◽  
Paras N. Prasad
Keyword(s):  
Excited State ◽  
Rhodamine 6G ◽  
Sol Gel ◽  
Decay Kinetics ◽  
Time Resolved ◽  
Laser Illumination ◽  
State Decay ◽  
Sol Gel Films ◽  
Microscope Slides

Rhodamine 6G- (R6G) doped thin sol-gel films were cast on glass microscope slides and characterized with the use of steady-state and time-resolved fluorescence spectroscopy. The fluorescence intensity, photodegradation under laser illumination, and excited-state decay kinetics were all investigated as a function of dopant concentration. The excited-state decay kinetics of highly doped films show clear evidence of R6G aggregation. Photodegradation under laser illumination is very interesting and is discussed in detail.

Ultrafast decay dynamics of electronically excited 2-ethylpyrrole

2021 ◽  
Author(s):  
Wenpeng Yuan ◽  
Dongyuan Yang ◽  
Baihui Feng ◽  
Yanjun Min ◽  
Zhichao Chen ◽  
...  
Keyword(s):  
Excited State ◽  
Wavelength Range ◽  
Photoelectron Spectra ◽  
Imaging Method ◽  
Photoelectron Imaging ◽  
Time Resolved ◽  
State Decay ◽  
Electronically Excited ◽  
Uv Excitation

The excited-state decay dynamics of 2-ethylpyrrole following UV excitation at a wavelength range of 254.8-218.0 nm is investigated in detail using femtosecond time-resolved photoelectron imaging method. The time-resolved photoelectron spectra...

Visualization and Manipulation of Molecular Motion in Solid State through Photo-Induced Clusteroluminescence

2019 ◽  
Author(s):  
Haoke Zhang ◽  
Lili Du ◽  
Lin Wang ◽  
Junkai Liu ◽  
Qing Wan ◽  
...  
Keyword(s):  
Quantum Mechanics ◽  
Excited State ◽  
Solid State ◽  
Light Source ◽  
Molecular Motion ◽  
Molecular Machine ◽  
Conjugated Molecules ◽  
Time Resolved ◽  
Packing Structure ◽  
New Strategy

<p>Building molecular machine has long been a dream of scientists as it is expected to revolutionize many aspects of technology and medicine. Implementing the solid-state molecular motion is the prerequisite for a practical molecular machine. However, few works on solid-state molecular motion have been reported and it is almost impossible to “see” the motion even if it happens. Here the light-driven molecular motion in solid state is discovered in two non-conjugated molecules <i>s</i>-DPE and <i>s</i>-DPE-TM, resulting in the formation of excited-state though-space complex (ESTSC). Meanwhile, the newly formed ESTSC generates an abnormal visible emission which is termed as clusteroluminescence. Notably, the original packing structure can recover from ESTSC when the light source is removed. These processes have been confirmed by time-resolved spectroscopy and quantum mechanics calculation. This work provides a new strategy to manipulate and “see” solid-state molecular motion and gains new insights into the mechanistic picture of clusteroluminescence.<br></p>

Unveiling anharmonic coupling by means of excited state ab initio dynamics: application to diarylethene photoreactivity

2019 ◽  
Vol 21 (7) ◽  
pp. 3606-3614 ◽  
Author(s):  
Maria Gabriella Chiariello ◽  
Umberto Raucci ◽  
Federico Coppola ◽  
Nadia Rega
Keyword(s):  
Excited State ◽  
Ab Initio ◽  
Vibrational Analysis ◽  
Time Resolved ◽  
Anharmonic Coupling ◽  
New Time

We adopted excited state ab initio dynamics and a new time resolved vibrational analysis to unveil coupling between modes promoting photorelaxation.

scholarly journals Ground- and excited-state characteristics in photovoltaic polymer N2200

RSC Advances ◽  
2021 ◽  
Author(s):  
Guanzhao Wen ◽  
Xianshao Zou ◽  
Rong Hu ◽  
Jun Peng ◽  
Zhifeng Chen ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Excited State ◽  
Steady State ◽  
Excited States ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Time Dependent ◽  
Functional Theory ◽  
Time Resolved ◽  
Dependent Density

Ground- and excited-states properties of N2200 have been studied by steady-state and time-resolved spectroscopies as well as time-dependent density functional theory calculations.

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