Results 31 to 40 of about 44,706 (210)

Donor–Acceptor Pentacene Analogues With Near‐Infrared Emission and Tunable Aromaticity

open access: yesAngewandte Chemie, Volume 138, Issue 20, 11 May 2026.
Air‐ and photostable heterocyclic pentacene analogues with donor and acceptor groups flanking a para‐quinodimethane core exhibit large dipole moments, narrow bandgaps, reversible redox behavior, and NIR‐I to NIR‐II absorption and emission with pronounced solvatochromism.
Krzysztof Nowak   +6 more
wiley   +2 more sources

The comparative toxicity of xanthones and tannins in mangosteen (Garcinia mangostana Linn.) pericarp extract against BHK-21 fibroblast cell culture

open access: yesContemporary Clinical Dentistry, 2019
Objective: The objective of this study is to compare the toxicity level of xanthones and tannins derived from mangosteen pericarp extract at specific concentrations against BHK-21 fibroblast cell cultures.
Fikarini H Puteri   +4 more
doaj   +1 more source

A Computational Study to Predict Wound Healing Agents from the Peel of the Mangosteen (Garcinia mangostana L.) Extract [PDF]

open access: yesInternational Journal Bioautomation, 2020
This study aimed to identify potentially active compounds from mangosteen peel extracts that heal skin burns and to evaluate their molecular mechanisms.
Marisca Evalina Gondokesumo   +5 more
doaj   +1 more source

From Natural Products to New Synthetic Small Molecules: A Journey through the World of Xanthones

open access: yesMolecules, 2021
This work reviews the contributions of the corresponding author (M.M.M.P.) and her research group to Medicinal Chemistry concerning the isolation from plant and marine sources of xanthone derivatives as well as their synthesis, biological/pharmacological
Madalena M. M. Pinto   +8 more
doaj   +1 more source

Newly Synthesized Oxygenated Xanthones as Potential P-Glycoprotein Activators: In Vitro, Ex Vivo, and In Silico Studies

open access: yesMolecules, 2019
P-glycoprotein (P-gp) plays a crucial role in the protection of susceptible organs, by significantly decreasing the absorption/distribution of harmful xenobiotics and, consequently, their toxicity.
Eva Martins   +10 more
doaj   +1 more source

Tablet Formulation Containing Chitosan-Alginate Microparticles: Characterization and Release Profile of Xanthones

open access: yesInternational Journal of Technology, 2020
Mangosteen pericarp extract contains a high amount of xanthones, which are secondary plant metabolites that exhibit high antioxidant activities as well as beneficial pharmacological properties, but low bioavailabilities.
Elsa Anisa Krisanti   +3 more
doaj   +1 more source

Novel Xanthone Derivatives Impair Growth and Invasiveness of Colon Cancer Cells In Vitro

open access: yesBiomolecules, 2021
Natural xanthones are a large group of compounds from which promising anticancer properties could be further developed by chemical modifications. This study aimed to investigate the influence of four novel xanthone derivatives based on a naturally ...
Jakub Rech   +7 more
doaj   +1 more source

Design, Synthesis, and Photophysical Studies of Functionalized Polyaromatic Isonitriles as Visible Light Photoredox Catalysts

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
A new series of structurally rich polyaromatic isonitriles is presented as photoredox catalysts. Their photophysical properties are investigated by UV–Vis absorption and fluorescence measurements, combined with experimental and theoretical studies to evaluate both ground‐ and excited‐state redox properties.
Cristina Martini   +9 more
wiley   +1 more source

Hydrogen Atom Transfer Induces Photodegradation in Carbonyl‐Based Multi‐Resonance TADF Emitters

open access: yesAngewandte Chemie, Volume 138, Issue 19, 4 May 2026.
Boosting triplet harvesting in N/C═O MR‐TADF emitters unexpectedly induces rapid photodegradation under oxygen‐free conditions. Spectroscopic studies reveal that triplet excited states trigger hydrogen‐atom transfer from solvent to the carbonyl unit, driven by triplet energetics and hydrogen electrophilicity.
Changfeng Si   +4 more
wiley   +2 more sources

2-Phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide Radical (PTIO•) Trapping Activity and Mechanisms of 16 Phenolic Xanthones

open access: yesMolecules, 2018
This study used the 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide radical (PTIO•) trapping model to study the antioxidant activities of 16 natural xanthones in aqueous solution, including garcinone C, γ-mangostin, subelliptenone G ...
Xican Li   +3 more
doaj   +1 more source

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