Results 81 to 90 of about 114,417 (310)

Thermodynamic interpretation of a dihedral angle in composite materials

Science of Sintering, 2004
The equilibrium between solid and 1iquid phases in sintered composite materials has been studied. It is shown that closed surfaces, which bound dispersed phases, influence the mechanical equilibrium between these phases. An expression is derived for a dihedral angle in composite materials, which includes values of surface tensions at the phase ...
A.F. Lisovsky
openalex   +4 more sources

Secondary Coordination Sphere‐Directed Design of Thermo‐Responsive and Bright Luminescent Manganese(II) Complexes

Advanced Optical Materials, EarlyView.
Luminescent manganese(II) complexes with modified secondary coordination spheres exhibit remarkably high emission quantum yields and distinct chromic behavior. The introduction of steric and functional groups enhances emission efficiency and enables temperature dependent emission color changes through reversible intramolecular interactions in the ...
Masaki Yoshida, Fuwenhan Zhang, Kaito Segawa, Kanon Komoda, Kodai Yuasa, Hiromu Obata, Nobuto Yoshinari, Masako Kato   +7 more
wiley   +1 more source

Diethyl 1-[(4-methyl-2-phenyl-4,5-dihydro-1,3-oxazol-4-yl)methyl]-1H-1,2,3-triazole-4,5-dicarboxylate

IUCrData, 2017
In the title compound, C19H22N4O5, the central triazole ring makes dihedral angles of 56.15 (8) and 43.25 (9)° with the oxazole and benzene rings, respectively. The mean planes of the two ethoxycarbonyl groups make dihedral angles of 24.16 (11) and 51.90 
Salaheddine Boukhssas, Younas Aouine, Hassane Faraj, Anouar Alami, Abdelilah El Hallaoui, Hafid Zouihri   +5 more
doaj   +1 more source

Rigid ball-polyhedra in Euclidean 3-space

, 2012
A ball-polyhedron is the intersection with non-empty interior of finitely many (closed) unit balls in Euclidean 3-space. One can represent the boundary of a ball-polyhedron as the union of vertices, edges, and faces defined in a rather natural way.
F Aurenhammer, H Edelsbrunner, I Izmestiev, J Matoušek, JJ Stoker, K Bezdek, K Bezdek, K Bezdek, Károly Bezdek, Márton Naszódi, R Connelly, R Mazzeo, YS Kupitz   +12 more
core   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Diisopropyl 1-(4-methoxyphenyl)-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate

Acta Crystallographica Section E, 2011
In the title compound, C28H32N2O7, the 1,4-dihydropyridine ring adopts a flattened boat conformation. The two benzene rings are approximately perpendicular to the dihydropyridine ring, forming dihedral angles of 84.29 (9) and 82.96 (9)
Kamini Kapoor, Vivek K. Gupta, Rajni Kant, Milind P. Pawar, Hitendra S. Joshi   +4 more
doaj   +1 more source

Effective Sampling in the Configurational Space by the Multicanonical-Multioverlap Algorithm

, 2006
We propose a new generalized-ensemble algorithm, which we refer to as the multicanonical-multioverlap algorithm. By utilizing a non-Boltzmann weight factor, this method realizes a random walk in the multi-dimensional, energy-overlap space and explores ...
B. A. Berg, M. H. Quenouille, R. G. Miller, Satoru G. Itoh, Y. Sugita, Yuko Okamoto   +5 more
core   +1 more source

Water‐Mediated 1,7‐Palladium Aryl‐to‐Aryl Migration in an Unusual Aryne Trimerization Enables the Synthesis of Multihelicenes with Profoundly Hindered Stereogenic Axes

Advanced Synthesis &Catalysis, EarlyView.
In the presence of a Pd0 catalyst, large π‐extended arynes trimerize in an unusual manner to forge extremely compact and strained chiral benzenoids. This new trimerization reaction involves a 1,7‐Pd isomerization, a rare and poorly understood process that is elucidated.
Albert Artigas, Manuel A. Ortuño, Jesús Castro‐Esteban, Michel Giorgi, Diego Peña, Dolores Pérez, Yoann Coquerel   +6 more
wiley   +1 more source

5-Hydroxy-2-nitrobenzaldehyde thiosemicarbazone (HNBATSC)

Acta Crystallographica Section E, 2014
The asymmetric unit of the title compound, C8H8N4O3S, consists of two independent molecules. Each molecule is approximately planar with dihedral angles of 8.71 (3) and 1.50 (2)° between the aromatic ring and the thiosemicarbazide moiety while the NO2 ...
M. Sivasankar Reddy, Y. Sarala, M. Jagadeesh, Samar K. Das, Varada Reddy Ammireddy   +4 more
doaj   +1 more source

CO2‐to‐Cyclic Carbonate Transformation at Ambient Pressure Using a Mechanochemically Prepared Ti(III) Catalyst

Advanced Synthesis &Catalysis, EarlyView.
A Ti(III) complex synthesized mechanochemically catalyzes the cycloaddition of CO2 (1 bar) with terminal, internal, and trisubstituted epoxides. Mechanistic studies by density functional theory calculations reveal that the superior activity of Ti(III) compared to Ti(IV) arises from its lower oxophilicity, facilitating CO2 insertion into Ti–O bonds, as ...
Elena Álvarez‐Ruiz, Marta Navarro, Ignacio Sancho, Israel Fernández, Cristina Santamaría, Alberto Hernán‐Gómez   +5 more
wiley   +1 more source