scholarly journals Reaction of Oxygen with the Singlet Excited State of [n]Cycloparaphenylenes (n = 9, 12, and 15): A Time-Resolved Transient Absorption Study Seamlessly Covering Time Ranges from Subnanoseconds to Microseconds by the Randomly-Interleaved-Pulse-Train Method

2019 ◽  
Vol 124 (1) ◽  
pp. 46-55 ◽  
Author(s):  
Tomoyoshi Suenobu ◽  
Ikuya Arahori ◽  
Ken-ichi Nakayama ◽  
Toshiaki Suzuki ◽  
Ryuzi Katoh ◽  
...  
Keyword(s):  
Excited State ◽  
Pulse Train ◽  
Transient Absorption ◽  
Singlet Excited State ◽  
Absorption Study ◽  
Time Resolved

Excited state relaxation paths in 9,9′-bianthryl and 9-carbazolyl-anthracene: a sub-ps transient absorption study

2000 ◽  
Vol 253 (2-3) ◽  
pp. 339-349 ◽  
Author(s):  
Martin Jurczok ◽  
Pascal Plaza ◽  
Monique M Martin ◽  
Yves H Meyer ◽  
Wolfgang Rettig
Keyword(s):  
Excited State ◽  
Transient Absorption ◽  
Absorption Study

scholarly journals Ultrafast processes triggered by one- and two-photon excitation of a photochromic and luminescent hydrazone

2019 ◽  
Vol 15 ◽  
pp. 2438-2446 ◽  
Author(s):  
Alessandro Iagatti ◽  
Baihao Shao ◽  
Alberto Credi ◽  
Barbara Ventura ◽  
Ivan Aprahamian ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Transient Absorption ◽  
Solvent Polarity ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Time Resolved ◽  
Two Photon Absorption ◽  
Two Photon

In this work we apply a combination of steady state and time resolved luminescence and absorption spectroscopies to investigate the excited-state dynamics of a recently developed molecular photoswitch, belonging to the hydrazone family. The outstanding properties of this molecule, involving fluorescence toggling, bistability, high isomerization quantum yield and non-negligible two-photon absorption cross section, make it very promising for numerous applications. Here we show that the light induced Z/E isomerization occurs on a fast <1 ps timescale in both toluene and acetonitrile, while the excited state lifetime of the Z-form depends on solvent polarity, suggesting a partial charge transfer nature of its low lying excited state. Time-resolved luminescence measurements evidence the presence of a main emission component in the 500–520 nm spectral range, attributed to the Z-isomer, and a very short living blue-shifted emission, attributed to the E-isomer. Finally, transient absorption measurements performed upon far-red excitation are employed as an alternative method to determine the two-photon absorption cross-section of the molecule.

Excited-state dynamics of heteroleptic copper(i) photosensitizers and their electrochemically reduced forms containing a dipyridophenazine moiety – a spectroelectrochemical transient absorption study

2019 ◽  
Vol 21 (20) ◽  
pp. 10716-10725
Author(s):  
Ying Zhang ◽  
Linda Zedler ◽  
Michael Karnahl ◽  
Benjamin Dietzek
Keyword(s):  
Excited State ◽  
Transient Absorption ◽  
Absorption Study ◽  
Excited State Dynamics ◽  
Reduced Forms

Heteroleptic copper(i) dipyridophenazine complexes were investigated by transient absorption spectroelectrochemistry to examine their multi-electron photoaccumulation properties.

scholarly journals Excited-state symmetry breaking of linear quadrupolar chromophores: A transient absorption study

2016 ◽  
Vol 664 ◽  
pp. 56-62 ◽  
Author(s):  
Nadia Dozova ◽  
Lionel Ventelon ◽  
Guillaume Clermont ◽  
Mireille Blanchard-Desce ◽  
Pascal Plaza
Keyword(s):  
Excited State ◽  
Symmetry Breaking ◽  
Transient Absorption ◽  
Absorption Study

Photoconversion of β-Lapachone to α-Lapachone via a Protonation-Assisted Singlet Excited State Pathway in Aqueous Solution: A Time-Resolved Spectroscopic Study

2015 ◽  
Vol 80 (15) ◽  
pp. 7340-7350 ◽  
Author(s):  
Lili Du ◽  
Ming-De Li ◽  
Yanfeng Zhang ◽  
Jiadan Xue ◽  
Xiting Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Spectroscopic Study ◽  
Singlet Excited State ◽  
Time Resolved

Picosecond time-resolved observation of photoinduced charge separation from the singlet excited state of porphyrin-quinone model systems

1981 ◽  
Vol 84 (2) ◽  
pp. 263-266 ◽  
Author(s):  
Masahito Migita ◽  
Tadashi Okada ◽  
Noboru Magata ◽  
Shinji Nishitani ◽  
Nobuyuki Kurata ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
Model Systems ◽  
Singlet Excited State ◽  
Time Resolved ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Remarkable effects of solvent and substitution on the photo-dynamics of cytosine: a femtosecond broadband time-resolved fluorescence and transient absorption study

2015 ◽  
Vol 17 (29) ◽  
pp. 19045-19057 ◽  
Author(s):  
Chensheng Ma ◽  
Chopen Chan-Wut Cheng ◽  
Chris Tsz-Leung Chan ◽  
Ruth Chau-Ting Chan ◽  
Wai-Ming Kwok
Keyword(s):  
Transient Absorption ◽  
Absorption Study ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Nonradiative Deactivation

Solvent alters differently the rate of ππ* and nπ* decay while substitution enhances or eliminates the nπ* from cytosine nonradiative deactivation.

Sign in / Sign up

Export Citation Format

Share Document