Results 61 to 70 of about 148,723 (205)

Crystal structure of the pyridine–diiodine (1/1) adduct

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title adduct, C5H5N·I2, the N—I distance [2.424 (8) Å] is remarkably shorter than the sum of the van der Waals radii. The line through the I atoms forms an angle of 78.39 (16)° with the normal to the pyridine ring.
Matti Tuikka, Matti Haukka
doaj   +1 more source

Origin of Enhanced Efficiency and Reduced Roll‐Off in Organic Light‐Emitting Diodes Based on Pt(II) Complexes

Advanced Science, EarlyView.
Controlled Pt–Pt fine structure in square‐planar Pt(II) complexes governs metal–metal‐to‐ligand charge‐transfer (MMLCT) state formation, exciton dynamics, and organic light‐emitting diode performance. Short Pt–Pt contacts in Pt(fppz)2 enable coherent metal–metal coupling, sub‐microsecond emission and an external quantum efficiency of 29%, whereas ...
Atul Shukla, Sarah K. M. McGregor, Julian A. Steele, Innes K. Gale, Kiyoshi Miyata, Monirul Hassan, Christian McDonald, Romain J. Lepage, Eduardo Solano, Pilankatta K. Ramya, Cherumuttathu H. Suresh, Takumi Ehara, Chihaya Adachi, Ken Onda, Shih‐Chun Lo, Ebinazar B. Namdas   +15 more
wiley   +1 more source

Crystal structure, Hirshfeld surface analysis and interaction energy and DFT studies of 4-[(prop-2-en-1-yloxy)methyl]-3,6-bis(pyridin-2-yl)pyridazine

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compound, C18H16N4O, consists of a 3,6-bis(pyridin-2-yl)pyridazine moiety linked to a 4-[(prop-2-en-1-yloxy)methyl] group. The pyridine-2-yl rings are oriented at a dihedral angle of 17.34 (4)° and are rotated slightly out of the plane of the ...
Mouad Filali, Nada Kheira Sebbar, Tuncer Hökelek, Joel T. Mague, Said Chakroune, Abdessalam Ben-Tama, El Mestafa El Hadrami   +6 more
doaj   +1 more source

Dual Nickel/Photoredox‐Catalyzed Regio‐ and Enantioselective Alkenylation of Epoxides

Advanced Science, EarlyView.
Ni/photoredox‐catalyzed stereoconvergent cross‐electrophile coupling of racemic epoxides with alkenyl bromides is described, affording β‐alkenyl products with up to 95% ee, excellent E‐selectivity, and complete regiocontrol. These versatile intermediates enable diverse chiral synthons; mechanistic studies suggest a halide ring‐opening followed by ...
Hongyan Lan, Shengzhou Jin, Zhao‐Dong Xu, Guigen Li, Dingyi Wang   +4 more
wiley   +1 more source

The crystal structures of three pyrazine-2,5-dicarboxamides: three-dimensional supramolecular structures

Acta Crystallographica Section E: Crystallographic Communications, 2017
The complete molecules of the title compounds, N2,N5-bis(pyridin-2-ylmethyl)pyrazine-2,5-dicarboxamide, C18H16N6O2 (I), 3,6-dimethyl-N2,N5-bis(pyridin-2-ylmethyl)pyrazine-2,5-dicarboxamide, C20H20N6O2 (II), and N2,N5-bis(pyridin-4-ylmethyl)pyrazine-2,5 ...
Dilovan S. Cati, Helen Stoeckli-Evans
doaj   +1 more source

Heteroatom‐Mediated Covalent Organic Framework Membranes With Nitrogen‐Enriched Nanochannels for Efficient Desalination

Advanced Science, EarlyView.
Heteroatom precursor engineering serves as a molecular‐level strategy to tailor hydrazide monomer reactivity and diffusion kinetics, enabling controlled assembly of highly crystalline COF membranes with ultramicroporous channels. The nitrogen‐enriched nanochannels deliver high water/ion selectivity via simultaneous water transport acceleration and ion ...
Guishan Hu, Muning Chen, Yunqiu Zhou, Yu Zhen, Miaomiao Tian, Yatao Zhang, Jingwei Hou, Junyong Zhu, Yong Wang   +8 more
wiley   +1 more source

Chelation‐Driven Dual‐Interface Regulation for Long‐Life Aqueous Zn–I2 Batteries

Advanced Science, EarlyView.
Zn2+–TPEN coordination generates TPEN‐derived coordination species (TCC) that contribute to the regulation of both electrode interfaces. At the Zn anode, it creates an interfacial environment with reduced water accessibility that suppresses HER and corrosion while promoting uniform deposition; at the I2 cathode, it captures polyiodide to inhibit ...
Dong Wook Kim, Seung Hwa Park, Tae Rim Kim, Gun Jang, Jun Su Kim, Myung‐Jun Kwak, Seokhwan Jin, Seongbin Ga, Chihyun Hwang, Ho Seok Park, Youngkwon Kim   +10 more
wiley   +1 more source

Indium-Catalyzed Annulation of o-Acylanilines with Alkoxyheteroarenes: Synthesis of Heteroaryl[b]quinolines and Subsequent Transformation to Cryptolepine Derivatives

Molecules, 2018
We disclose herein the first synthetic method that is capable of offering heteroaryl[b]quinolines (HA[b]Qs) with structural diversity, which include tricyclic and tetracyclic structures with (benzo)thienyl, (benzo)furanyl, and indolyl rings.
Kyohei Yonekura, Mika Shinoda, Yuko Yonekura, Teruhisa Tsuchimoto   +3 more
doaj   +1 more source

Autonomous Solar Metallurgy for High‐Purity Gold Recovery from Electronic Waste

Advanced Science, EarlyView.
Inspired by microbial strategies for metal uptake and biomineralization, defect‐rich copper sulfide (Cu31S16) functions as a solar metallurgical platform that unifies Au(III) capture, reduction, and self‐separation. The bioinspired design enables ultrafast gold recovery from electronic‐waste leachates and the spontaneous formation of millimeter‐scale ...
Chaopeng Liu, Jiajun Li, Jialin Ruan, Wei Zhang, Wei Sun, Hongmei Li, Lei Xie, Min Liu   +7 more
wiley   +1 more source

Crystal structure of 2,6-bis[(1H-pyrazol-1-yl)methyl]pyridine

Acta Crystallographica Section E, 2014
In the title compound, C13H13N5, the planes of the pyrazolyl groups are nearly perpendicular to that of the central pyridine ring, making dihedral angles of 87.77 (8) and 85.73 (7)°.
Kyung-sun Son, Jeong Oh Woo, Daeyoung Kim, Sung Kwon Kang   +3 more
doaj   +1 more source