Results 101 to 110 of about 131,197 (331)

Wind tunnel investigation of an unpowered helicopter fuselage model with a V-type empennage [PDF]

The applicability of a V-type empennage on an unpowered semiscale helicopter fuselage is considered as design criteria for improved directional control devices.
Freeman, C. E., Yeager, W. T., Jr.
core   +1 more source

Ultrahigh High‐temperature Capacitive Energy Storage Via Proton Irradiation

Advanced Science, EarlyView.
Proton irradiation concurrently induces enhanced dielectric constant and breakdown field in aromatic polymers with ether bonds, which enables an ultrahigh discharged energy density of 6.9 J cm−3 at above the efficiency of 95% at 150 °C, exceeding current dielectric polymers and nanocomposites.
Chenyi Li, Hanxiao Gao, Yutie Gong, Yen‐Ting Lin, Yuquan Liu, Yuanqi Wang, Lan Chen, Hangyao Wu, Ling Cheng, Yang Li, Yang Liu, Huamin Zhou   +11 more
wiley   +1 more source

Hidden Diradical: Conformational Switch for Solvatochromic NIR Emission With Unity Quantum Yield in Thiele's Hydrocarbon

Angewandte Chemie, EarlyView.
Halogen substitution controls a conformational switch between a folded closed‐shell and a flat singlet‐diradical conformer in an air‐stable Thiele‐diradical. This conformational switch allows for near‐unity photoluminescence quantum yield with a large Stokes shift, solvatochromism, and a long‐lived excited state.
Matteo Bevilacqua, Mattia Reato, Federico Cilento, Claudia Graiff, Sabrina Antonello, Luca Schio, Alessandro Aliprandi, Cristina Tubaro, Lorenzo Franco, Martina Dell'Angela, Dominik Munz, Marco Baron   +11 more
wiley   +2 more sources

(2E)-3-(3-Bromo-4-methoxyphenyl)-1-(4-fluorophenyl)prop-2-en-1-one

Acta Crystallographica Section E, 2011
In the title compound, C16H12BrFO2, the dihedral angle between the aromatic rings is 23.75 (12)° and the dihedral angle between the prop-2-en-1-one fragment and the fluorobenzene ring is 20.9 (2)°.
Grzegorz Dutkiewicz, B. P. Siddaraju, H. S. Yathirajan, B. Narayana, Maciej Kubicki   +4 more
doaj   +1 more source

Amiloride hydro­chloride methanol disolvate [PDF]

, 2010
In the crystal of the title compound [systematic name: 2-(3,5-diamino-6-chloro­pyrazin-2-ylcarbon­yl)guanidinium chloride methanol disolvate], C6H9ClN7O+·Cl-·2CH3OH , the components are connected by N—H ... N, N—H ... Cl, N—H ... O, O—H ...
Bolte, Michael, Cuong, Ton Quoc
core  

Halogen‐Bond Coupled Halogenated‐π‐Conjugation Enables Giant Birefringence in Hydrogen‐Bonded Organic Frameworks

Advanced Science, EarlyView.
The perfect crystal packing achieved via the halogen‐bond (XB) coupled halogenated‐π‐conjugation strategy effectively induces an ultrahigh birefringence (Δn = 0.97), which exhibits promising potential in polarization control and phase modulation.
Miao‐Bin Xu, Yun‐Xia Hu, Ming‐Chang Wang, Jia‐Jia Li, Jia‐Min Lian, Jin Chen, Ke‐Zhao Du   +6 more
wiley   +1 more source

Tellurophene‐Induced Triplet–Singlet Spin‐Flip Acceleration: An Advanced Design for Narrowband Organoboron Emitters with Fast Reverse Intersystem Crossing

Angewandte Chemie, EarlyView.
Linking an auxiliary dibenzo[b,d]tellurophene unit markedly accelerates exciton spin conversion in multi‐resonance‐type thermally activated delayed fluorescence emitters. Owing to the heavy‐atom effect of tellurium, the corresponding OLEDs retain remarkably high external electroluminescence quantum efficiencies exceeding 25% even at an exceptionally ...
Peiyuan Yang, Jun Hyeon Lee, Kotone Urano, Takuma Yasuda   +3 more
wiley   +2 more sources

Crystal structure of 4-(2,2-dimethylpropanamido)pyridin-3-yl N,N-diisopropyldithiocarbamate

Acta Crystallographica Section E, 2014
In the title compound, C17H27N3OS2, the amide group is approximately coplanar with the pyridine ring [dihedral angle = 1.6 (1)°], whereas the dithiocarbamate group is nearly perpendicular to the pyridine ring [dihedral angle = 76.7 (1)°]. In the crystal,
Gamal A. El-Hiti, Keith Smith, Amany S. Hegazy, Mohammed Baashen, Benson M. Kariuki   +4 more
doaj   +1 more source

High-resolution NMR structure of an RNA model system : the 14-mer cUUCGg tetraloop hairpin RNA [PDF]

, 2010
We present a high-resolution nuclear magnetic resonance (NMR) solution structure of a 14-mer RNA hairpin capped by cUUCGg tetraloop. This short and very stable RNA presents an important model system for the study of RNA structure and dynamics using NMR ...
Fürtig, Boris, Jonker, Hendrik R. A., Nozinovic, Senada, Richter, Christian, Schwalbe, Harald (Prof. Dr.)   +4 more
core  

Interplay of Backbone Conformation, Morphology and Thermoelectric Properties of Benzodifuranone‐Isatin Acceptor Polymers

Advanced Electronic Materials, EarlyView.
Modification of polymer backbone via halogenation and comonomer selection leads to conjugated backbones of different stereoelectronic properties, thin film morphologies, and electrical characteristics. The interplay of conformational isomerism, coplanarity, backbone curvature, backbone orientation, and ordering in thin films, electrical conductivity ...
Diego R. Hinojosa, Nathan J. Pataki, Francesca Pallini, Guillaume Freychet, Andreas Erhardt, Kevin Schuller, Selina Olthof, Klaus Meerholz, Christopher R. McNeill, Mario Caironi, Florian Günther, Michael Sommer   +11 more
wiley   +1 more source