Results 21 to 30 of about 15,472 (254)
Recent advances in the synthesis and application of fluorescent α-amino acids [PDF]
, 2016 Fluorescence spectroscopy has become a powerful technique for probing a range of complex biological processes including enzyme mechanisms and protein-protein interactions. While the application of this technique uses a number of strategies, many of these
Harkiss, Alexander, Sutherland, Andrew
core +1 more source
Xanthones from aerial parts of Juss
Natural Product Communications, 2013 From the aerial parts of Hypericum laricifolium Juss., twelve compounds were isolated and identified. They were the xanthones: 1-hydroxy-7-methoxy-xanthone ( 1 ), 1,7-dihydroxy-xanthone ( 2 ), 2-hydroxy-xanthone ( 3 ), 6-deoxyisojacareubin ( 4 ), 1,3 ...
Irama Ramírez-González +2 more
doaj +1 more source
5,8-Dihydroxy-2,2-dimethyl-12-(3-methylbut-2-enyl)pyrano[3,2-b]xanthen-6-one (brasixanthone B)
IUCrData, 2023 The title compound (trivial name brasixanthone B), C23H22O5, isolated from Calophyllum gracilentum, is characterized by a xanthone skeleton of three fused six-membered rings plus an additional fused pyrano ring and one 3-methylbut-2-enyl side chain.
Nurr Maria Ulfa Binti Seruji +6 more
doaj +1 more source
The Thermal degradation of Bisphenol A Polycarbonate in Air [PDF]
, 2005 The thermal degradation of polycarbonate in air was studied as a function of mass loss using TGA/FTIR, GC/MS and LC/MS. In the main degradation region, 480–560 °C, the assigned structures of smaller molecules and linear molecules that evolved in air were
Jang, Bok Nam, Wilkie, Charles A.
core +2 more sources
Donor–Acceptor Pentacene Analogues With Near‐Infrared Emission and Tunable Aromaticity
Angewandte Chemie, EarlyView.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
Xanthones with Antiproliferative Effects on Prostate Cancer Cells from the Stem Bark of
Natural Product Communications, 2012 Investigations of the constituents of the stem barks of Garcinia xanthochymus have yielded two new compounds, garcinenones X (1) and Y (2), along with five known xanthones, 1,4,5,6-tetrahydroxy-7-(3-methylbut-2-enyl)xanthone (3), 1,4,6-trihydroxy-5 ...
Feng Ji +6 more
doaj +1 more source
High fidelity sorting of remarkably similar components via metal-mediated assembly. [PDF]
, 2015 Subtle differences in ligand coordination angle and rigidity lead to high fidelity sorting between individual components displaying identical coordination motifs upon metal-mediated self-assembly.
Beran, Gregory JO +3 more
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Hydrogen Atom Transfer Induces Photodegradation in Carbonyl‐Based Multi‐Resonance TADF Emitters
Angewandte Chemie, EarlyView.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
Cytotoxic Xanthones from the Leaves of
Natural Product Communications, 2007 Two new xanthones, 7-hydroxydesoxymorellin ( 1 ) and isocaledonixanthone D ( 2 ), and four known ones, gaudichaudione H, 1,7-dihydroxy-3-methoxy-2-(3-methyl-2-butenyl)xanthone, 1,5-dihydroxy-3-methoxy-2-(3-methyl-2-butenyl)xanthone, and 1,3,7-trihydroxy ...
Rozida Mohd Khalid +5 more
doaj +1 more source
Chemical Constituents From the Bark of
Natural Product Communications, 2020 The phytochemical investigation of the methanol extract of bark of Garcinia oblongifolia yielded a new xanthone derivative 1,3,8-trihydroxy-6’,6’-dimethylpyrano (2’,3’:5,6) xanthone ( 5 ) along with 8 known compounds, including 1,2,5-trihydroxy-6 ...
Yutong Han +5 more
doaj +1 more source