Results 51 to 60 of about 5,634 (238)

Shaping the Afterglow of Indolo[3, 2‐b]Carbazoles via Modulating Intersystem Crossing (ISC/rISC) and Phosphorescence Rates

open access: yesAggregate, Volume 7, Issue 4, April 2026.
In a series of indolo[3,2‐b]carbazoles (X‐ICZ‐p1; X = F, Cl, Br), the afterglow properties are shaped by modulating intersystem crossing (ISC/rISC) and phosphorescence rates. F/Cl‐ICZ‐p1 systems show moderate rates, achieving color‐tunable, dual‐mode afterglow in polymethyl methacrylate from persistent thermally activated delayed fluorescence (pTADF ...
Jiang Zhao   +4 more
wiley   +1 more source

Assessment of DNA Topoisomerase I Unwinding Activity, Radical Scavenging Capacity, and Inhibition of Breast Cancer Cell Viability of N-alkyl-acridones and N,N′-dialkyl-9,9′-biacridylidenes

open access: yesBiomolecules, 2019
The anticancer activity of acridone derivatives has attracted increasing interest, therefore, a variety of substituted analogs belonging to this family have been developed and evaluated for their anti-cancer properties.
Marios G. Krokidis   +9 more
doaj   +1 more source

A Unique Topoisomerase II Inhibitor with Dose-Affected Anticancer Mechanisms and Less Cardiotoxicity

open access: yesCells, 2021
Type II DNA topoisomerase (topo II) is an essential nuclear enzyme and a well-validated anticancer drug target. Previously, we have carried out several rounds of structural optimizations on our in-house topo II inhibitor E17, which was shown to have ...
Zhi-Ying Li, Guang-Sen Xu, Xun Li
doaj   +1 more source

Improving the fluorescent probe acridonylalanine through a combination of theory and experiment [PDF]

open access: yes, 2018
Acridonylalanine (Acd) is a useful fluorophore for studying proteins by fluorescence spectroscopy, but it can potentially be improved by being made longer wavelength or brighter.
Barrett, Taylor M.   +12 more
core  

Acridone alkaloids and flavones from the leaves of Citrus reticulata

open access: yesNatural Product Research, 2021
A new acridone alkaloid, reticarcidone A (1), decorated with an oxygenated isopentenyl group between C-1 and C-2, was isolated from the leaves of Citrus reticulata Blanco, together with nine known acridone alkaloids (2–10) and fifteen flavones compounds (
Ye Ye, Gang Xu, Dong-Liang Li
semanticscholar   +1 more source

Unravelling the Functional Diversity of Type III Polyketide Synthases in Fungi

open access: yesAngewandte Chemie, Volume 137, Issue 44, October 27, 2025.
Type III polyketide synthases (T3PKSs) produce diverse compounds of ecological and clinical importance. Here, the activity of 37 fungal T3PKSs was profiled, revealing unexpected products and generating several pharmaceutical precursors. The machine learning model trained on the activity data accurately extrapolates the predictions to other enzymes and ...
Nika Sokolova   +3 more
wiley   +2 more sources

Coupled Excited-State Dynamics in N-Substituted 2-Methoxy-9-Acridones

open access: yesFrontiers in Chemistry, 2019
Fluorophores of the acridone family have been widely employed in many applications, such as DNA sequencing, the detection of biomolecules, and the monitoring of enzymatic systems, as well as being the bases of intracellular sensors and even antitumoral ...
M. Carmen Gonzalez-Garcia   +9 more
doaj   +1 more source

Temperature dependent NIR emitting lanthanide-PMO/silica hybrid materials [PDF]

open access: yes, 2017
Two materials - a mesoporous silica (MS) and a periodic mesoporous organosilica (PMO) functionalized with dipyridyl-pyridazine (dppz) units were grafted with near-infrared (NIR) emitting lanthanide (Nd3+, Er3+, Yb3+) complexes in an attempt to obtain ...
Esquivel, Dolores   +5 more
core   +2 more sources

Studies Directed towards the Synthesis of the Acridone Family of Natural Products: Total Synthesis of Acronycines and Atalaphyllidines

open access: yesACS Omega, 2021
A modular and flexible three-step synthetic strategy has been developed for the synthesis of acridone natural products of biological significance. The tetracyclic core of acridone derivatives has been achieved efficiently in high yield from commercially ...
T. Mandal   +3 more
semanticscholar   +1 more source

Application of Lanthanide Shift Reagent to the 1H-NMR Assignments of Acridone Alkaloids

open access: yesMolecules, 2020
This study investigates the application of the paramagnetic shift reagent tris(dipivaloylmethanato)-europium(III) in NMR spectral studies of permethoxyacridone alkaloids (1–3) and pyranoacridone alkaloids (4–6).
Sio-Hong Lam   +5 more
doaj   +1 more source

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