Results 151 to 160 of about 454,598 (214)

Structural and Functional Characterisation of a Metagenome‐Derived CYP108D18 Reveals an Unusual Dioxygen‐Bound State and Selective Hydrocarbon Hydroxylation

Microbial Biotechnology, Volume 19, Issue 10, October 2026.
CYP108D18, identified from a hot spring metagenome, catalyses selective phenylcyclohexane hydroxylation. This P450 has an exceptionally low substrate‐bound heme redox potential. Crystal structures revealed an unusual dioxygen‐bound substrate‐free form and a persistent open active site upon substrate binding.
Simran Kundral, Peter D. Giang, Alicia M. Kirk, Julia B. Buczynski, Kasun S. A. Arachchige, Sunil K. Khare, Paul V. Bernhardt, Paul N. Evans, Luke W. Guddat, Stephen G. Bell, James J. De Voss   +10 more
wiley   +1 more source

Linearly Expanded Azulenes in the S0$$ {\mathrm{S}}_0 $$, T1$$ {\mathrm{T}}_1 $$, and Qu1$$ {\mathrm{Qu}}_1 $$ States: A Unified View of Electronic Structure and Aromaticity

Journal of Computational Chemistry, Volume 47, Issue 25, September 30, 2026.
Linear expansion of azulene leads to markedly different electronic behavior from that of the corresponding acenes, including an earlier emergence of open‐shell character. Simple resonance structures provide an intuitive framework for understanding these trends and their evolution with molecular size.
Pallavi Sarkar, Itay Almog, Renana Gershoni‐Poranne   +2 more
wiley   +1 more source

Machine‐Learning‐Guided Discovery of Boron‐Free Narrowband Blue Thermally Activated Delayed Fluorescence Emitters

Angewandte Chemie, Volume 138, Issue 39, 21 September 2026.
A data‐driven discovery engine—exhaustive enumeration of carbazole‐containing polycyclic aromatic hydrocarbons (Cz‐PAHs) followed by machine learning—identifies boron‐free, narrowband blue thermally activated delayed fluorescence emitters for organic light‐emitting diodes (OLEDs).
Masaya Hagai, Jie Sun, Jun Hyeon Lee, Kazuhiro J. Fujimoto, Shigehiro Yamaguchi, Takuma Yasuda, Takeshi Yanai   +6 more
wiley   +2 more sources

Exogenous NADH enhances polycyclic aromatic hydrocarbon degradation in <i>Novosphingobium pentaromativorans</i> US6-1 by boosting energy metabolism and reducing oxidative stress. [PDF]

Appl Environ Microbiol
Meng Q, Lv F, Huang J, Chen H, Cao F, Yu Z.   +5 more
europepmc   +1 more source

Photochemical Aging of Atmospheric Black Carbon Promotes Nitrate Coating in a Chinese Megacity

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Black carbon (BC) aerosol critically influences climate and haze, yet the mechanisms driving its coating and light absorption enhancement remain poorly understood. Here, we show that BC in Beijing is coated by ammonium nitrate via photochemistry.
Yonghong Wang, Yiqun Cao, Zixiao Wu, Shuying Li, Zhanyu Su, Peng Zhang, Quan Liu, Jun Liu, Tianzeng Chen, Hao Li, Xinghua Zhang, Biwu Chu, Qingxin Ma, Yujing Mu, Guangzhi He, Hong He   +15 more
wiley   +1 more source

Post‐Modification of Tripyrenylenes to Enantiopure π‐Extended D3‐Symmetric Propellers

Chemistry – A European Journal, Volume 32, Issue 36, 24 September 2026.
The post‐modification of tripyrenylenes to π‐extended enantiopure propellers with tris‐phenanthrophenazines is presented and the chiroptical properties as well as the solid‐state packings investigated in comparison to the corresponding racemic mixtures.
Dennis Popp, Melanie Bruttel, Sebastian Möbert, Anusha Sounder Rajan, Christoph Keck, Darius Boehm, Frank Rominger, Sven M. Elbert, Michael Mastalerz   +8 more
wiley   +1 more source

Comparative Carcinogenic Risk Assessment of Polycyclic Aromatic Hydrocarbons Accumulation in Normal and Cancerous Lung Tissues of Patients from Northern Thailand. [PDF]

Toxics
Yabueng N, Samakarn Y, Pairojtanachai K, Kraisitnitikul P, Kabao J, Tajarernmuang P, Supphapipat A, Siwachat S, Saeteng S, Chantara S, Tantraworasin A.   +10 more
europepmc   +1 more source

Modular π‐Extended IF‐TTF Systems: Tuning Redox and Optical Properties in Donor–Acceptor and Donor–Donor Frameworks

European Journal of Organic Chemistry, Volume 29, Issue 36, 24 September 2026.
Donor–acceptor and donor–donor systems incorporating an indeno[1,2‐b]fluorene‐extended tetrathiafulvalene (IF‐TTF) donor motif were prepared by Suzuki coupling reactions. The compounds were studied for their optical and redox properties. The compounds showed multiredox behavior with several accessible redox states. A series of π‐extended donor–acceptor
Cecilie Rindom, Mogens Brøndsted Nielsen   +1 more
wiley   +1 more source

Chemical Distribution Kinetics of Five Polycyclic Aromatic Hydrocarbons in a Microphysiological System. [PDF]

Toxics
Nitsche KS, Proença S, Bakker W, Carmichael PL, Bouwmeester H, Kramer NI.   +5 more
europepmc   +1 more source

Confinement‐Induced Enhancement of Solid‐State Emission Quantum Yield in Rubrene@MOF Hybrid Materials

Zeitschrift für anorganische und allgemeine Chemie, Volume 652, Issue 14, 23 September 2026.
Pore‐size‐controlled nanoconfinement of rubrene within UiO‐66 and UiO‐67 suppresses aggregation‐caused quenching and restores bright solid‐state emission. Geometric exclusion and energetic destabilization prevent parallel stacking, yielding solution‐like absorption and fluorescence quantum yields up to 25%.
Julia Larcher, Viktoria Kiefer, Manuel Ott, Armin Penz, Thomas S. Hofer, Gregor Jung, Heidi A. Reichl   +6 more
wiley   +1 more source