Results 31 to 40 of about 28,603 (262)

High efficient room temperature phosphorescent materials constructed with methylene molecular configuration

open access: yesFrontiers in Chemistry, 2022
In this work, we have investigated several pure organic room temperature phosphorescent materials with donor-methylene acceptor configurations with relatively different quantum efficiency.
Jian Wang
doaj   +1 more source

Development of an Organic Emitter Exhibiting Reverse Intersystem Crossing Faster than Intersystem Crossing

open access: yesAngewandte Chemie International Edition
AbstractIn thermally activated delayed fluorescence (TADF)‐based organic light‐emitting diodes (OLEDs), acceleration of reverse intersystem crossing (RISC) and suppression of intersystem crossing (ISC) are demanded to shorten a lifetime of triplet excitons. As a system realizing RISC faster than ISC, inverted singlet‐triplet excited states (iST) with a
Ryosuke Okumura   +5 more
openaire   +3 more sources

Mechanism of the Zn(II)Phthalocyanines’ Photochemical Reactions Depending on the Number of Substituents and Geometry

open access: yesMolecules, 2016
In this work, the synthesis and the nonlinear absorption and population dynamics investigation of a series of zinc phthalocyanines (ZnPcs) dissolved in chloroform are reported.
Leandro Henrique Zucolotto Cocca   +9 more
doaj   +1 more source

Effect of temperature on rate of the spin-forbidden transition in uracil and thymine [PDF]

open access: yesJournal of the Serbian Chemical Society, 2013
The intersystem crossing rates of uracil and thymine molecules in interaction with the heat bath were studied by means of the ab initio methods. The rates were calculated employing the time-dependent approach based on the correlation function.
Etinski Mihajlo
doaj   +1 more source

All-optical coherent population trapping with defect spin ensembles in silicon carbide [PDF]

open access: yes, 2014
Divacancy defects in silicon carbide have long-lived electronic spin states and sharp optical transitions, with properties that are similar to the nitrogen-vacancy defect in diamond. We report experiments on 4H-SiC that investigate all-optical addressing
O'Shea, Danny   +3 more
core   +2 more sources

Ultralong phosphorescence cellulose with excellent anti-bacterial, water-resistant and ease-to-process performance

open access: yesNature Communications, 2022
Organic room-temperature phosphorescence (RTP) materials often suffer from poor processability because of their crystalline or cross-linked nature.
Xin Zhang   +5 more
doaj   +1 more source

Intersystem crossing in the exit channel

open access: yesNature Chemistry, 2018
Intersystem crossing plays an important role in photochemistry. It is understood to be efficient when heavy atoms are present due to strong spin-orbit coupling, or when strongly bound long-lived complexes are formed that increase the chance of finding the singlet-triplet intersection seam.
Hongwei Li   +3 more
openaire   +3 more sources

Internal Conversion vs. Intersystem Crossing – What Drives the Dynamics of Cyclic α,β-Enones?

open access: yesEPJ Web of Conferences, 2013
The origin of ultrafast intersystem crossing and its competitiveness with singlet pathways was studied in cyclic α,β-enones by transient absorption, time-resolved photoelectron spectroscopy and ab initio calculations.
Riedle E.   +6 more
doaj   +1 more source

The effect of applied magnetic field on photocurrent generation in poly-3-hexylthiophene:[6,6]-phenyl C61-butyric acid methyl ester photovoltaic devices [PDF]

open access: yes, 2008
This is the author’s version of a work that was accepted for publication in Journal of Physics: Condensed Matter http://dx.doi.org/10.1088/0953-8984/20/45 ...
Ballantyne, AM   +6 more
core   +1 more source

Spin-Vibronic Mechanism for Intersystem Crossing

open access: yesChemical Reviews, 2018
Intersystem crossing (ISC), formally forbidden within nonrelativistic quantum theory, is the mechanism by which a molecule changes its spin state. It plays an important role in the excited state decay dynamics of many molecular systems and not just those containing heavy elements.
Thomas J. Penfold   +3 more
openaire   +4 more sources

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