Results 51 to 60 of about 643,193 (264)

Bioguided Identification of Active Antimicrobial Compounds from Asphodelus bento-rainhae and Asphodelus macrocarpus Root Tubers

open access: yesPharmaceuticals, 2023
Root tubers of Asphodelus bento-rainhae subsp. bento-rainhae (AbR), a vulnerable endemic species, and Asphodelus macrocarpus subsp. macrocarpus (AmR) have traditionally been used in Portugal to treat inflammatory and infectious skin disorders.
Maryam Malmir   +10 more
doaj   +1 more source

Structural and Compositional Effects on the Scintillation Properties of Fast Emitting Metal‐Organic Frameworks

open access: yesAdvanced Science, EarlyView.
The crystalline structure, the atomic numbers of the constituent elementsand the size of MOF crystals each influence their photoluminescence and scintillation properties in distinct ways. Together, these factors provide valuable guidelines for designing systems with optimized performance and tunable timing characteristics, arising from the synergistic ...
Francesca Cova   +8 more
wiley   +1 more source

Introducing Diradicaloid Thiele's Hydrocarbon Derivatives as Ligand in Transition Metal Chemistry

open access: yesAngewandte Chemie, EarlyView.
N‐doped Thiele's hydrocarbon derivative is introduced as a ligand for the synthesis of mono‐ and bimetallic rhodium complexes as well as cyclometalated iridium complexes. These compounds constitute the first metal complexes based on a Thiele's hydrocarbon (or p‐quinodimethane) derivative and, to the best of our knowledge, the first cyclometalated ...
Alok Mahata   +2 more
wiley   +2 more sources

Hidrocarbonetos policíclicos aromáticos (HPAS) em cachaça, rum, uísque e álcool combustível Polycyclic aromatic hydrocarbons (PAHS) in cachaça, rum, whiskey and alcohol fuel

open access: yesQuímica Nova, 2009
The concentration of 15 polycyclic aromatic hydrocarbons (PAHs) in 57 samples of distillates (cachaça, rum, whiskey, and alcohol fuel) has been determined by HPLC-Fluorescence detection.
Carlos Alexandre Galinaro   +1 more
doaj   +1 more source

Computation‐Guided Control of Excited‐State Deactivation through Modulation of Conical‐Intersection Accessibility by Donor–Acceptor Asymmetry in Bridged Stilbene AIE Luminogens

open access: yesAdvanced Science, EarlyView.
Donor–acceptor asymmetry modulates conical‐intersection accessibility and topology in bridged stilbenes, providing mechanistic insight into excited‐state deactivation and aggregation‐induced emission (AIE). ABSTRACT A computation‐guided investigation of asymmetric donor–acceptor bridged stilbenes reveals structure–property relationships governing ...
Takuya Tanaka   +8 more
wiley   +1 more source

Monolithic Porous Polymer Architectures for Visible‐to‐UV Upconversion‐Driven Photochemical Reactions

open access: yesAngewandte Chemie, EarlyView.
Porous polymer monoliths embedded with sensitizer–annihilator dye pairs enable efficient solid‐state visible‐to‐ultraviolet triplet–triplet annihilation‐based photon upconversion under low‐intensity blue and green light. Their co‐continuous porous architectures balance chromophore interactions with substrate accessibility, providing robust and tunable ...
Sakura Nakagawa   +5 more
wiley   +2 more sources

Triplet–triplet upconversion enhanced by spin–orbit coupling in organic light-emitting diodes

open access: yesNature Communications, 2019
Though triplet-triplet upconversion is a promising strategy for designing new deep blue-emitting organic materials, maximizing the efficiency of this process remains difficult.
Ryota Ieuji   +2 more
doaj   +1 more source

Furfuryl Alcohol‐Driven Proton Supply Enables Efficient Photocatalytic H2O2 Production Beyond Water‐Based Systems

open access: yesAdvanced Science, EarlyView.
A ZnIn2S4–carbon dot heterojunction enables photocatalytic H2O2 production coupled with furfuryl alcohol oxidation. In this redox system, furfuryl alcohol acts as both the electron donor and oxidation substrate, producing furoic acid with 100% selectivity and 98% conversion while supporting efficient H2O2 generation with a solar‐to‐chemical conversion (
Pengfei Bai   +9 more
wiley   +1 more source

Non‐Covalent PL, CD, and CPL Activation of Linear Aromatic Oligomers within Axially Chiral Aromatic Capsules

open access: yesAngewandte Chemie, EarlyView.
Linear aromatic oligomers display intense photoluminescence (PL), circular dichroism (CD), and circularly polarized luminescence (CPL) properties upon non‐covalent encapsulation by axially‐chiral aromatic capsules under ambient aqueous conditions.
Yoshihisa Hashimoto   +4 more
wiley   +2 more sources

The Chromatographic Behaviors of Anthracene Derivatives.

open access: yesThe Journal of the Society of Chemical Industry, Japan, 1961
α-メチル-,β-メチル-,1,2-ジメチル-,2,6-ジメチル-等メチルナフタリン類,1-(2',3',4',5'-テトラヒドロフェニル)ナフタリン(HφN),1-フェニルナフタリン(φN),1,1'-ナフチル(BN),1,2-および1,4-ナフトキノン(NQ)について, おもにヘキサン- アルミナ系で吸着等温式を測定し, 先に提案した成長率R g および固有展開比E を求めて,クロマトグラフ特性と化学構造との関係を考察した。メチル基の導入は,影響が余り現われなかったが,HφN,φN,BNは,いずれも,そのUVスペクトルはナフタリン(N)のそれに近いが,α 位の置換基が,HφN,φN,BNの順に,分子の平面性に関する共鳴構造にかなりの寄与を示すことが, そのスペクトルから認められ ...
Toshikazu NAGAI, Eiichi FUNAKUBO
openaire   +2 more sources

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