Photochemical and photodynamical properties of sulfur‐substituted nucleic acid bases

B Ashwood, M Pollum… - Photochemistry and …, 2019 - Wiley Online Library
Sulfur‐substituted nucleobases (aka, thiobases) are among the world's leading prescriptions
for chemotherapy and immunosuppression. Long‐term treatment with azathioprine, 6 …

Quantum and semiclassical dynamical studies of nonadiabatic processes in solution: achievements and perspectives

F Santoro, JA Green, L Martinez-Fernandez… - Physical Chemistry …, 2021 - pubs.rsc.org
We concisely review the main methodological approaches to model nonadiabatic dynamics
in isotropic solutions and their applications. Three general classes of models are identified …

Electronic relaxation pathways in heavy-atom-free photosensitizers absorbing near-infrared radiation and exhibiting high yields of singlet oxygen generation

LA Ortiz-Rodríguez, SJ Hoehn, A Loredo… - Journal of the …, 2021 - ACS Publications
Heavy-atom-free photosensitizers (HAF-PSs) based on thionation of carbonyl groups of
readily accessible organic compounds are rapidly emerging as a versatile class of …

Observation of the sub-100 femtosecond population of a dark state in a thiobase mediating intersystem crossing

R Borrego-Varillas, DC Teles-Ferreira… - Journal of the …, 2018 - ACS Publications
We combined sub-30 fs broadband transient absorption spectroscopy in the ultraviolet with
state-of-the-art quantum mechanics/molecular mechanics simulations to study the ultrafast …

Photophysics and photochemistry of canonical nucleobases' thioanalogs: From quantum mechanical studies to time resolved experiments

S Arslancan, L Martínez-Fernández, I Corral - Molecules, 2017 - mdpi.com
Interest in understanding the photophysics and photochemistry of thiated nucleobases has
been awakened because of their possible involvement in primordial RNA or their potential …

2-Thiouracil intersystem crossing photodynamics studied by wavelength-dependent photoelectron and transient absorption spectroscopies

JA Sánchez-Rodríguez, A Mohamadzade… - Physical Chemistry …, 2017 - pubs.rsc.org
Single-atom substitution within a natural nucleobase—such as replacing oxygen by sulfur in
uracil—can result in drastic changes in the relaxation dynamics after UV excitation. While …

Excited-state dynamics in the RNA nucleotide uridine 5′-monophosphate investigated using femtosecond broadband transient absorption spectroscopy

MM Brister, CE Crespo-Hernández - The journal of physical …, 2019 - ACS Publications
Damage to RNA from ultraviolet radiation induces chemical modifications to the
nucleobases. Unraveling the excited states involved in these reactions is essential; …

Double thionated pyrimidine nucleobases: molecular tools with tunable photoproperties

A Mohamadzade, A Nenov, M Garavelli… - Journal of the …, 2023 - ACS Publications
Sulfur-substituted nucleobases are DNA and RNA base derivatives that exhibit extremely
efficient photoinduced intersystem crossing (ISC) dynamics into the lowest-energy triplet …

Detection of the thietane precursor in the UVA formation of the DNA 6-4 photoadduct

LA Ortiz-Rodríguez, C Reichardt, SJ Hoehn… - Nature …, 2020 - nature.com
Notwithstanding the central biological role of the (6-4) photoadduct in the induction of skin
cancer by sunlight, crucial mechanistic details about its formation have evaded …

Thieno [3, 4-d] pyrimidin-4 (3 H)-thione: an effective, oxygenation independent, heavy-atom-free photosensitizer for cancer cells

LA Ortiz-Rodríguez, YG Fang, G Niogret, K Hadidi… - Chemical …, 2023 - pubs.rsc.org
All-organic, heavy-atom-free photosensitizers based on thionation of nucleobases are
receiving increased attention because they are easy to make, noncytotoxic, work both in the …