Results 91 to 100 of about 14,125 (198)

Enhanced Intersystem Crossing in a Thiohelicene

ChemPhotoChem
AbstractThe photophysics of a helicene derivative in which two benzene units are replaced by thiophene units (thiohelicene, 6H) was studied by steady state and transient absorption and emission spectroscopies covering time ranges from femtoseconds to minutes.
Bergwinkl, Sebastian, Nuernberger, Patrick, Dick, Bernhard, Kutta, Roger Jan   +3 more
openaire   +2 more sources

Selenium Substitution Enhances Reverse Intersystem Crossing in a Delayed Fluorescence Emitter

, 2020
Organic emitters exhibiting delayed fluorescence (DF) are promising luminescent materials for next-generation organic light-emitting diodes (OLEDs). Faster intersystem crossing rates and shorter emission lifetimes can be achieved in luminescent molecules
McAllister, Bryony T.,, Hoover, Gabrielle C.,, Aizawa, Naoya,, Credgington, Dan,, Pu, Yong-Jin,, Myers, William K.,, Seferos, Dwight S.,, Drummond, Bluebell H.,, Gillett, Alexander,, Jones, Saul T. E.,   +9 more
core   +1 more source

Facile Synthetic Access Towards Sulfur- and Selenium-Functionalized Boron-Based Multiresonance TADF Emitters

Molecules
Thermally activated delayed fluorescence (TADF) materials with high photoluminescence quantum yields and a fast reverse intersystem crossing (RISC) are of the highest interest for organic light-emitting diodes (OLEDs). In the past decade, triaryl boranes
Zeynep Güven, Hadi Dolati, Leo Wessel, René Frank   +3 more
doaj   +1 more source

Ultrafast Decay of the Excited Singlet States of Thioxanthone by Internal Conversion and Intersystem Crossing

, 2010
The experimental ultrafast photophysics of thioxanthone in several aprotic organic solvents at room temperature is presented, measured using femtosecond transient absorption together with high-level ab initio CASPT2 calculations of the singlet- and ...
Patrice Jacques, Jacques, Patrice, Luis Serrano-Andrés, Grilj, Jakob, Vauthey, Eric, Eric Vauthey, Òscar Rubio-Pons, Gonzalo Angulo, Serrano-Andrés, Luis, Jakob Grilj, Angulo, Gonzalo, Rubio-Pons, Oscar   +11 more
core   +1 more source

Intersystem crossing rates of single perylene molecules in ortho-dichlorobenzene

, 2016
Triplet states can be interesting for optical switching of molecular fluorescence as well as quantum experiments relying on the manipulation of spin states. However, the ground state of molecules is usually a singlet state. It is therefore interesting to
Navarro, Pedro, Faez, Sanli, Nanophotonics, Navarro Perez, P., Verhart, Nico R., Verhart, N.R., Sub Nanophotonics, Orrit, Michel, Ebrahimi Pour Faez, S., Orrit, M.A.G.J.   +9 more
core   +1 more source

Anti-solvatochromic fluorescence enhancement via the suppression of S1-T2 intersystem crossing by polarity

Next Materials
Attenuated fluorescence of organic fluorescent probes is typically observed in hydrophilic environments due to solvatochromic fluorescence quenching, where the brightness decreases along with increasing solvent polarity.
Hao Li, Juanjuan Zhang, Yue-Tong Fang, Yu-Min Wang, Gui-Yuan Wu, Zhenggang Lan, Zhou Lu   +6 more
doaj   +1 more source

INTERSYSTEM CROSSING IN NAPHTHALENE AT ROTATIONAL RESOLUTION

, 1988
Author Institution: Pysisch Laboratorium, Toernooiveld, 6525Due to intersystem crossing the $S_{1}$ state of naphthalene is coupled to a manifold of triplet states. Therefore part of the excited singlet state molecules will end in the triplet state.
Uijt De Haag, P. A. M., Meerts, W. Leo
core  

Reverse intersystem crossing mechanisms in doped triangulenes

Physical Chemistry Chemical Physics
Electronic structure calculations suggest that reverse intersystem crossing in B and N-doped triangulenes can occur via both direct (spin–orbit coupling) and mediated (spin–vibronic coupling) mechanisms.
Asier E. Izu, Jon M. Matxain, David Casanova   +2 more
openaire   +3 more sources

Sub-100 Fs Intersystem Crossing to a Metal-Centered Triplet in Ni(II)OEP Observed with M-Edge XANES

, 2019
Nickel porphyrins have been extenstively studied as photosensitizers due to their long-lived metal-centered excited states. The multiplicity of the (d,d) state, and/or the rate of intersystem crossing between singlet and triplet metal-centered states ...
Josh Vura-Weis (6585716), Kaili, Zhang, Josh, Vura-Weis, Elizabeth S. Ryland (6585721), Kaili Zhang (6585725), Elizabeth S., Ryland   +5 more
core   +1 more source

Slow fluorescence and fast intersystem crossing - The xanthone anomaly

Intersystem crossing of xanthone in protic solvents proceeds within ∼ 1 ps, whereas its fluorescence decays within 60–600 ps.
Milota, F., Fierz, B., Root, C., Gilch, P., Kiefhaber, T., Zinth, W., Schmidt, B., Heinz, B.   +7 more
core   +1 more source