Ultrafast Dynamics of Hydrogen Bond Breaking and Making in the Excited State of Fluoren-9-one: Time-Resolved Visible Pump–IR Probe Spectroscopic Study

2017 ◽  
Vol 121 (5) ◽  
pp. 1068-1080 ◽  
Author(s):  
Rajib Ghosh ◽  
Aruna K. Mora ◽  
Sukhendu Nath ◽  
Dipak K. Palit
Keyword(s):  
Hydrogen Bond ◽  
Excited State ◽  
Spectroscopic Study ◽  
Bond Breaking ◽  
Ultrafast Dynamics ◽  
Time Resolved

scholarly journals First Direct Structural Information on a Reactive .sigma..pi.* Excited State: Time-Resolved UV-Vis and IR Spectroscopic Study of Re(benzyl)(CO)3(iPr-DAB)

1995 ◽  
Vol 117 (46) ◽  
pp. 11582-11583 ◽  
Author(s):  
Brenda D. Rossenaar ◽  
Michael W. George ◽  
Frank P. A. Johnson ◽  
Derk J. Stufkens ◽  
James J. Turner ◽  
...  
Keyword(s):  
Excited State ◽  
Spectroscopic Study ◽  
Structural Information ◽  
Time Resolved ◽  
State Time ◽  
Ir Spectroscopic

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.

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