Results 121 to 130 of about 78,578 (289)

Polycyclic Spiro Lignans and Biphenyl Tetrahydrofuranone Lignans from Gymnotheca involucrata

, 2016
Four rare polycyclic spiro lignans (1-4) and four new biphenyl tetrahydrofuranone lignans (5-8) were isolated from the whole plant of Gymnotheca involucrata.
Xia, B, Gu, YC, Xiao, SJ, Zhou, Y (reprint author), Chinese Acad Sci, Chengdu Inst Biol, Key Lab Mt Ecol Restorat & Bioresource Utilizat, 9 Sect 4,Renmin Nan Rd, Chengdu 610041, Peoples R China., Ding, LS, Zhou, Y, Guo, DL, Allen, S, Chen, F   +8 more
core   +1 more source

A Fluorine‐Free, Low Ion Pair Electrolyte for Transition Metal‐Free and Halogen‐Free Sodium Batteries

Advanced Energy Materials, EarlyView.
Fluorine‐containing electrolytes dominate modern rechargeable batteries, yet the fundamental design principles for fluorine‐free systems remain largely unexplored. We demonstrate that fluorine‐free electrolyte chemistry can simultaneously achieve long cycle life, fast charging, and stable interphase formation in sodium‐ion batteries.
Dawei Xia, Pengcheng Li, He Zhou, Xu Feng, Dennis Nordlund, Weibo Huang, Ge Li, Feng Lin   +7 more
wiley   +1 more source

Molecular Engineering of a Mixed‐Spacer System Toward High‐Performance Polycarbazole Anion‐Exchange Membranes

Angewandte Chemie, EarlyView.
Mixed‐spacer polycarbazole membranes balance conductivity, swelling, and stability by tuning hydration and ionic connectivity. The optimized membrane reaches 184 mS cm−1 hydroxide conductivity and 2.51 W cm−2 peak power density, offering a promising strategy for high‐performance ether‐free AEMs.
Hao Liu, Yingdan Cui, Chanikya D. Jayawardana, Mohammed Al Murisi, Hai Zhao, Md Waliullah Hossain, Zhitao Hu, Cem Arkun, Iftikhar Ahmad, Qi Wang, Sophya Garashchuk, William Mustain, Chuanbing Tang   +12 more
wiley   +2 more sources

Beyond Radical Emitters: Hot‐Exciton Electroluminescence From Singlet Diradicaloids

Angewandte Chemie, EarlyView.
The first hot‐exciton mechanism in a singlet diradicaloid is demonstrated in a polychlorinated Thiele hydrocarbon‐based organic light‐emitting transistor. Reverse intersystem crossing involving the T2 and bright singly excited states enables electroluminescence beyond the 25% spin‐statistical limit, leading to remarkable external quantum efficiency ...
Mario Prosa, Eugenio Lunedei, Michele Orza, Davide Mesto, Roberto Cantoni, Francesco Reginato, Angela Punzi, Arthur R. J. Barreto, Yasi Dai, Benedetta Carlotti, Fabrizia Negri, Stefano Toffanin, Davide Blasi   +12 more
wiley   +2 more sources

Double winding vine-shaped biphenyl with molecular asymmetry. Synthesis, structure, and properties [PDF]

A biphenyl derivative in which two benzene rings are strapped with two chains is prepared. The synthesized product shows molecular asymmetry, which was confirmed by HPLC analysis with chiral column and named as winding vine-shaped biphenyl. The synthesis
Atsunori, Mori, Masaki, Horie, Aruto, Maruka, Kohei, Tabuchi, Kentaro, Okano   +4 more
core   +2 more sources

Atroposelective Pd(0)‐Catalyzed Direct Intermolecular C─H Arylation of Thiazole N‐Oxides Provides Access to Heterobiaryls

Angewandte Chemie, EarlyView.
An enantioselective Pd(0)‐catalysed arylation at the C4‐position of thiazole N‐oxides directly forges the atropochiral heterobiaryl axis. A tailored point‐ and axially chiral monodentate phosphine ensures high reactivities along with a tight stereocontrol.
Vitalii Smal, Nicolai Cramer
wiley   +2 more sources

Metabolomic profiling of biphenyl-induced stress response of Brucella anthropi MAPB-9

Scientific Reports
The exposure of bacteria to toxic compounds such as polychlorinated biphenyl (PCB) and biphenyl induces an adaptive response at different levels of cell morphology, biochemistry, and physiology.
Monika Sandhu, Atish T. Paul, Prabhat N. Jha   +2 more
doaj   +1 more source

Durch einen stabilisierten Intermediatkomplex vermittelte Friedel‐Crafts‐Alkylierung auf Oberflächen

Angewandte Chemie, EarlyView.
Einblicke in eine Csp3${\rm C}_{sp^{3}}$‐Csp2${\rm C}_{sp^{2}}$‐Kupplung an Edelmetalloberflächen werden anhand einer oberflächenvermittelten Friedel‐Crafts‐Alkylierung auf Ag(111) gegeben. STM, XPS und DFT‐Rechnungen klären den Reaktionsmechanismus auf Einzelmolekülebene und die Stabilisierung des zentralen Intermediats auf.
Paul Schweer, Christoph J. Vonnemann, Nishanth Arumugam, Stefan M. Huber, Daniel P. Miller, Karina Morgenstern   +5 more
wiley   +1 more source

Radical, Not Ionic: The Mechanochemical Zincke Nitration of Phenols

Angewandte Chemie, EarlyView.
Mechanochemistry recasts the classical Zincke nitration as an open‐shell process. Liquid‐assisted vibrational milling of phenols with in situ HNO2 delivers direct and ipso nitration across 50 substrates, while atmosphere, NOx‐transfer, EPR and DFT evidence expose a phenoxyl‐radical/NO2 manifold underlying this historically ionic transformation ...
Roberto Scipione, Francesco Basoccu, Pietro Caboni, Francesca Sardu, Enrico Podda, Marco Lucarini, Massimiliano Arca, Andrea Porcheddu   +7 more
wiley   +2 more sources

1,2‐Bis(boronate) Arenes by Borylation Directed Borylation

Angewandte Chemie, EarlyView.
Boron electrophiles derived from tetrabromo‐pyrazaboles and AlCl3 affect the regioselective vicinal double C–H borylation of a range of arenes and polycyclic aromatic hydrocarbons (PAHs). A subsequent pinacol installation step then affords the vicinal bis‐boronate ester‐substituted arene/PAH.
Anna V. Schellbach, Mathew J. Cross, Emily Noone, Cate S. Anstöter, Michael J. Ingleson   +4 more
wiley   +2 more sources