Symmetry-breaking charge transfer in the excited state of directly linked push–pull porphyrin arrays

2017 ◽  
Vol 19 (21) ◽  
pp. 13970-13977 ◽  
Author(s):  
Taeyeon Kim ◽  
Jinseok Kim ◽  
Hirotaka Mori ◽  
Seongchul Park ◽  
Manho Lim ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Steady State ◽  
Symmetry Breaking ◽  
Time Resolved ◽  
Spectroscopic Measurements

We revealed a symmetry-breaking charge transfer (SBCT) process in the excited state of a directly linked push–pull porphyrin dyad (AD) and triad (ADA) via both steady-state and time-resolved spectroscopic measurements.

Steady-state and Time-resolved Spectroscopic Studies of Benzanilides

1999 ◽  
Vol 54 (8-9) ◽  
pp. 495-502 ◽  
Author(s):  
Józef Heldt ◽  
Janina R. Heldt ◽  
Jerzy Kamiński
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Steady State ◽  
Proton Transfer ◽  
Room Temperature ◽  
Spectroscopic Studies ◽  
Fluorescence Band ◽  
Polar Solvents ◽  
Time Resolved ◽  
Decay Times

Steady-state and time-resolved spectroscopic studies of benzanilide (I) and jV-methylbenzanilide (II)were performed at 298 and 77 K in various solvents. The results indicate that benzanilide fluorescencein non-polar solvents at room temperature involves three independent modes of emission: F1 (LE) normalfluorescence from the initially excited state S1 (LE) with λmax = 320 nm, F2´(PT) fluorescence from the proton transfer tautomer with λmax = 468 nm, F2″CT) fluorescence from the species where intramolecular charge transfer appears, with λmax = 510 nm. At 77 K in MCH a new fluorescence band, Fag, appears at λmax=415 nm instead of the F2(PT) and F2″CT) fluorescence. This new emission originates from benzanilide dipolar aggregates or cis-imidol dimers. The decay times of these emission modes aredifferent.N-methylbenzanilide, dissolved in nonpopular and weakly polar solvents at room temperature and at77 K, shows only two fluorescence modes, i.e., the normal and the charge-transfer emissions at 320 nmand 520 nm, respectively. The fluorescence is deactivated with two decay times, 30 ps and 2.05 ns, inMCH solution.

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.

scholarly journals Steric effects in light-induced solvent proton abstraction

2020 ◽  
Vol 22 (35) ◽  
pp. 19613-19622 ◽  
Author(s):  
Jurick Lahiri ◽  
Mehdi Moemeni ◽  
Ilias Magoulas ◽  
Stephen H. Yuwono ◽  
Jessica Kline ◽  
...  
Keyword(s):  
Excited State ◽  
Steady State ◽  
Transfer Reactions ◽  
Steric Effects ◽  
Structural Factors ◽  
Time Resolved ◽  
Proton Abstraction ◽  
Excited State Proton Transfer ◽  
Proton Transfer Reactions ◽  
Solvent Proton

The significance of solvent structural factors in the excited-state proton transfer reactions of the super photobase FR0-SB with alcohols is examined using steady-state and time-resolved spectroscopy and quantum chemistry computations.

Symmetry-breaking intramolecular charge transfer in the excited state of meso-linked BODIPY dyads

2012 ◽  
Vol 48 (2) ◽  
pp. 284-286 ◽  
Author(s):  
Matthew T. Whited ◽  
Niral M. Patel ◽  
Sean T. Roberts ◽  
Kathryn Allen ◽  
Peter I. Djurovich ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Symmetry Breaking ◽  
Intramolecular Charge Transfer

Tuning the excited-state deactivation pathways of dinuclear ruthenium(ii) 2,2′-bipyridine complexes through bridging ligand design

2020 ◽  
Vol 49 (24) ◽  
pp. 8096-8106 ◽  
Author(s):  
Simon Cerfontaine ◽  
Ludovic Troian-Gautier ◽  
Sara A. M. Wehlin ◽  
Frédérique Loiseau ◽  
Emilie Cauët ◽  
...  
Keyword(s):  
Excited State ◽  
Steady State ◽  
Variable Temperature ◽  
Ligand Design ◽  
Binuclear Complexes ◽  
Time Resolved ◽  
Bridging Ligand ◽  
Dinuclear Ruthenium ◽  
Photophysical Study ◽  
Time Resolved Photoluminescence

A detailed photophysical study of binuclear complexes was performed using steady-state and time-resolved photoluminescence measurements at variable temperature. The results were compared with the prototypical [Ru(bpy)3]2+.

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
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