Photosensitized direct C–H fluorination and trifluoromethylation in organic synthesis

S Yakubov, JP Barham - Beilstein journal of organic chemistry, 2020 - beilstein-journals.org
The importance of fluorinated products in pharmaceutical and medicinal chemistry has
necessitated the development of synthetic fluorination methods, of which direct C–H …

Mechanism of the triplet-to-singlet upconversion in the assistant dopant ACRXTN

CM Marian - The Journal of Physical Chemistry C, 2016 - ACS Publications
In this work, the photophysics of 3-(9, 9-dimethylacridin-10 (9H)-yl)-9H-xanthen-9-one
(ACRXTN) has been investigated by combined density functional theory and multireference …

Dynamics of unfolded polypeptide chains as model for the earliest steps in protein folding

F Krieger, B Fierz, O Bieri, M Drewello… - Journal of molecular …, 2003 - Elsevier
The rate of formation of intramolecular interactions in unfolded proteins determines how fast
conformational space can be explored during folding. Characterization of the dynamics of …

Ultrafast intersystem crossing in xanthone from wavepacket dynamics

M Alías-Rodríguez, C de Graaf… - Journal of the American …, 2021 - ACS Publications
Most aromatic ketones containing first-row elements undergo unexpectedly fast intersystem
crossing in a few tens of picoseconds and a quantum yield close to unity. Among them …

Light-Driven Two-Step Preparation of 4-Chromanone Fused to Estrone Derivatives

MI Quindt, GF Gola, JA Ramirez… - The Journal of Organic …, 2023 - ACS Publications
A protocol involving the irradiation of some 3-(2-alkenyl) estrone and 3-(2-alkenyl)-17-nor
estrone derivatives under a nitrogen atmosphere in organic solvents (both hexane and …

Thioxanthone based water-soluble photoinitiators for acrylamide photopolymerization

DK Balta, G Temel, M Aydin, N Arsu - European Polymer Journal, 2010 - Elsevier
The two water-soluble thioxanthone-based 2-(carboxymethoxy) thioxanthone, 1A and 2-
thioxanthone-thioacetic acid sodium salts, 2A were synthesized and characterized by …

Ultrafast quenching of the xanthone triplet by energy transfer: new insight into the intersystem crossing kinetics

H Satzger, B Schmidt, C Root, W Zinth… - The Journal of …, 2004 - ACS Publications
The formation and quenching of the triplet state of xanthone are studied by femtosecond
techniques. As revealed by femtosecond fluorescence spectroscopy, the primarily excited …

Internal conversion of singlet and triplet states employing numerical DFT/MRCI derivative couplings: Implementation, tests, and application to xanthone

M Bracker, CM Marian, M Kleinschmidt - The Journal of Chemical …, 2021 - pubs.aip.org
We present an efficient implementation of nonadiabatic coupling matrix elements (NACMEs)
for density functional theory/multireference configuration interaction (DFT/MRCI) wave …

On the unusual fluorescence properties of xanthone in water

B Heinz, B Schmidt, C Root, H Satzger… - Physical Chemistry …, 2006 - pubs.rsc.org
Photo-excited xanthone is known to undergo ultrafast intersystem crossing (ISC) in the 1 ps
time domain. Correspondingly, its fluorescence quantum yield in most solvents is very small …

Photochemical Processes of Superbase Generation in Xanthone Carboxylic Salts

C Ley, A Siedel, T Bertaux… - Angewandte …, 2023 - Wiley Online Library
Photobase generators are species that allow the photocatalysis of various reactions, such as
thiol‐Michael, thiol‐isocyanate, and ring‐opening polymerization reactions. However …