scholarly journals Quantum-chemistry-aided ligand engineering for potential molecular switches: changing barriers to tune excited state lifetimes

2020 ◽  
Vol 56 (79) ◽  
pp. 11831-11834
Author(s):  
Dorottya Sárosiné Szemes ◽  
Tamás Keszthelyi ◽  
Mariann Papp ◽  
László Varga ◽  
György Vankó
Keyword(s):  
Excited State ◽  
Quantum Chemistry ◽  
Energy Barrier ◽  
Molecular Switches ◽  
Iron Complex ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Singlet States ◽  
Excited State Lifetimes

DFT predicts the ability to tune the energy barrier between the quintet and singlet states of an iron complex, and thus the quintet lifetime, with selected substituents on the ligand; this prediction is confirmed by time-resolved spectroscopy.

scholarly journals Time-Resolved Spectroscopy of the Metal-to-Metal Charge Transfer Excited State in Dinuclear Cyano-Bridged Mixed-Valence Complexes

2005 ◽  
Vol 44 (15) ◽  
pp. 5530-5536 ◽  
Author(s):  
Brendan P. Macpherson ◽  
Paul V. Bernhardt ◽  
Andreas Hauser ◽  
Stéphane Pagès ◽  
Eric Vauthey
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Mixed Valence ◽  
Time Resolved ◽  
Metal Charge ◽  
Time Resolved Spectroscopy ◽  
Metal Charge Transfer

Spectral and Photoprototropic Characteristics of 4-Aminobiphenyl in β-Cyclodextrin

2004 ◽  
Vol 69 (4) ◽  
pp. 748-758 ◽  
Author(s):  
Israel V. Muthu Vijayan Enoch ◽  
Meenakshisundaram Swaminathan
Keyword(s):  
Excited State ◽  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Inclusion Complex ◽  
Ground State ◽  
Time Resolved Fluorescence ◽  
Neutral Form ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

The photophysical and photoprototropic behaviour of 4-aminobiphenyl (4ABP) in aqueous β-cyclodextrin (β-CDx) solution has been investigated using steady-state and time-resolved fluorescence spectroscopy. Fluorescence of the neutral form of 4ABP is enhanced due to the formation of a 1:1 complex with β-CDx. The formation of this complex has been confirmed by time-resolved spectroscopy. In the presence of β-CDx, no change was observed in the ground state pKa value but the excited state pKa value changed. Based on its photophysical and photoprototropic characteristics in β-CDx, the structure of the 1:1 inclusion complex is proposed.

Excited state dynamics of nanocrystalline VO 2 with white light continuum time resolved spectroscopy

2014 ◽  
Vol 333 ◽  
pp. 109-114 ◽  
Author(s):  
Ulaş Kürüm ◽  
H. Gul Yaglioglu ◽  
Betül Küçüköz ◽  
R. Mustafa Oksuzoglu ◽  
Mustafa Yıldırım ◽  
...  
Keyword(s):  
Excited State ◽  
White Light ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Excited State Dynamics ◽  
White Light Continuum

Excited state lifetimes and energies of okenone and chlorobactene, exemplary keto and non-keto aryl carotenoids

2015 ◽  
Vol 17 (20) ◽  
pp. 13245-13256 ◽  
Author(s):  
Dariusz M. Niedzwiedzki ◽  
Laura Cranston
Keyword(s):  
Excited State ◽  
Photophysical Properties ◽  
Time Resolved ◽  
Excited State Lifetimes

Photophysical properties of two typical aryl carotenoids, okenone and chlorobactene, were studied with application of femtosecond and microsecond time-resolved absorption spectroscopies.

Step-Scan FTIR Time-Resolved Spectroscopy Study of Excited-State Dipole Orientation in Soluble Metallopolymers

2000 ◽  
Vol 39 (5) ◽  
pp. 893-898 ◽  
Author(s):  
Gregory D. Smith ◽  
Kimberly A. Maxwell ◽  
Joseph M. DeSimone ◽  
Thomas J. Meyer ◽  
Richard A. Palmer
Keyword(s):  
Excited State ◽  
Spectroscopy Study ◽  
Dipole Orientation ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Planar hexaphyrin-like macrocycles turning into bis-BODIPYs with box-shaped structures exhibiting excitonic coupling

2021 ◽  
Author(s):  
Arumugam Kalaiselvan ◽  
Shaina Dhamija ◽  
Chakrapani Aswathi ◽  
Arijit K. De ◽  
Sabapathi Gokulnath
Keyword(s):  
Electronic Structure ◽  
Excited State ◽  
Electronic Structure Calculations ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Excited State Dynamics ◽  
Structure Calculations ◽  
Excitonic Coupling

This present study reveals the synthesis and excited-state dynamics of carbazole embedded hexaphyrin-like macrocycles and their bis-BODIPY complexes. Time-resolved spectroscopy was performed to elucidate the excitonic coupling in conjunction with electronic structure calculations.

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