Results 151 to 160 of about 7,201 (251)

Nonextensive Statistics in Nanoscopic Quantum Dots. [PDF]

Nanomaterials (Basel)
Gil-Corrales JA, Morales AL, Duque CA.
europepmc   +1 more source

Influence of the Arabic Mathematics to Western Culture through the Geometry of the Pyramids [PDF]

أوراق کلاسیکیة, 2008
openaire   +1 more source

Great Pyramid Equinox Shadow Geometry as Long‑Term Astronomical Encoding

Core Claim The Great Pyramid’s equinox shadow patterns are so stable — across years and even across millions of years — that they must represent deliberate astronomical encoding, not architectural coincidence.
openaire   +2 more sources

Coordination Chemistry of Boron Subphthalocyanine With BINOL Derivatives: Unexpected Oxidation to Oxa[4]Helicene and Properties of the Resulting Axially Coordinated Complexes Containing Oxa[4]Helicene and/or BINOL Derivatives

Chemistry – A European Journal, EarlyView.
Treatment of BINOL with a boron subphthalocyanine derivative resulted in the formation of a complex coordinated to an oxa[4]helicene derivative, which is generated via a ring‐closure reaction of BINOL. In contrast, treatment of the monomethyl ether of 1,1′‐bi‐2‐naphthol (BINOL) afforded the expected axially coordinated complex.
Shafikul Islam, Kazuyuki Asahi, Hiroyuki Nishikawa, Daiki Tauchi, Masashi Hasegawa, Ken‐ichi Sugiura   +5 more
wiley   +1 more source

Multiscale-structured miniaturized 3D force sensors. [PDF]

Nat Mater
Yun G, Chen Z, Chen Z, Chen J, Zhou B, Xiao M, Stevens M, Chhowalla M, Hasan T.   +8 more
europepmc   +1 more source

Bis(2‐Adamantyl)Magnesium: Synthesis, Structure, and Applications of a Versatile and Shelf‐Stable 2‐Adamantyl Anion Equivalent

Chemistry – A European Journal, EarlyView.
At last, the long‐sought bis(2‐adamantyl)magnesium reagent has been prepared in high yield as a stable tetrahydrofuran/dioxane adduct and fully characterized by x‐ray crystallography. This potent nucleophile outperforms the corresponding Grignard in transmetallation and carbonyl addition reactions, opening new avenues in adamantyl organometallic and ...
Matthew V. DaCosta, Fioralba Taullaj, Jack H. Lin, Ulrich Fekl   +3 more
wiley   +1 more source

Atomistic Simulation-Driven Design of STM Tips for NiCp₂ Adsorption and Spin-State Modulation. [PDF]

Small
Dongfang N, Totti F, Iannuzzi M.
europepmc   +1 more source

Dioxygen Reduction at a Cu(I) Complex Supported by a Macrocyclic N3O Ligand System

Chemistry – A European Journal, EarlyView.
A non‐reactive [CuI(14‐TMC)]+ complex is transformed to an efficient catalyst [CuI(14‐TMCO)]+ (TMCO = 4,8,12‐trimethyl‐1‐oxa‐4,8,12‐triazacyclotetradecane) for 4e−/4H+ reduction of O2 by N → O substitution. ABSTRACT CuI(14 TMCO) (1), involving a N3O‐macrocycle, reacts with O2 at cryogenic temperatures to yield an end‐on peroxodicopper(II) species.
Maximilian Schütze, Dibya Jyoti Barman, Christian Lorent, Kallol Ray   +3 more
wiley   +1 more source

Chemical bonding concepts emerge naturally from maximally entangled atomic orbitals. [PDF]

Nat Commun
Ding L, Matito E, Schilling C.
europepmc   +1 more source

N‐Sulfonyl Azalevoglucosan: A Versatile Platform for the Synthesis of Polysubstituted Piperidines

Chemistry – A European Journal, EarlyView.
Gain by strain: The synthesis of a levoglucosan analog, in which the pyranose oxygen has been replaced by a nitrogen, allows navigation on the piperidine ring to iteratively install functional groups at C1, C2, C3, C4, and C6 positions using simple experimental protocols with minimal protecting group manipulation.
Dylan Yorga, Jérôme Marrot, Ana Poveda, Nicolas Auberger, Jesús Jiménez‐Barbero, Jérôme Désiré, Yves Blériot   +6 more
wiley   +1 more source