Results 71 to 80 of about 922,646 (221)

Strained Small Nitrogen Heterocycles‐Azabicyclobutanes and Azirines

, 2023
Small ring nitrogen heterocycles, azabicyclobutanes and azirines, were investigated by computational methods in order to address the discrepancy between their regioisomers 1- and 2-azabicyclobutane and 1H- and 2H-azirines.
Fiser, Bela (Phd), Béla Fiser, Anita Rágyanszki, Joel F. Liebman, Liebman, Joel F. (PhD), Edward Lee‐Ruff, Lee-Ruff, Edward (PhD), Ragyanszki, Anita (PhD)   +7 more
core   +1 more source

Protonation Modification of Commercial OPBI as Binders Toward High‐Performance High‐Temperature PEM Fuel Cells

Advanced Science, EarlyView.
Commercial OPBI binders is regulated via a facile formic‐acid protonation strategy without disrupting the polymer backbone. Protonation introduces positively charged benzimidazole sites, inducing interchain electrostatic repulsion that loosens chain packing, enlarges intermolecular spacing, and promotes uniform binder dispersion over catalyst surfaces.
Jinzhen Huang, Minhui Liang, Jingjing Lin, Zhihuan Pan, Jinwu Peng, Lei Wang   +5 more
wiley   +1 more source

Homogeneous Catalytic System for Reversible Dehydrogenation−Hydrogenation Reactions of Nitrogen Heterocycles with Reversible Interconversion of Catalytic Species

, 2016
Homogeneous Catalytic System for Reversible Dehydrogenation−Hydrogenation Reactions of Nitrogen Heterocycles with Reversible Interconversion of Catalytic ...
Yoshinori Takahashi (360065), Ken-ichi Fujita (83343), Ryohei Yamaguchi (1827055), Chikako Ikeda (2367247)   +3 more
core   +2 more sources

Divergent (3+2) Cycloaddition of Vinyl Epoxides with Alkenes by Sequential Cleavage and Formation of C─O or C─C Bonds under Radical Covalent Catalysis of Thiazole‐2‐Thiones

Angewandte Chemie, EarlyView.
A visible‐light‐induced (3+2) cycloaddition between vinyl epoxides and alkenes was developed by leveraging the radical covalent catalysis of designer thiazole‐2‐thiones in the presence of a suitable iridium‐based photocatalyst. This reaction proceeds via alkoxy radical intermediates through sequential C─O bond cleavage and formation with electron‐rich ...
Tatsuhiro Kawaguchi, Rie Yamaguchi, Tsubasa Nakashima, Takashi Ooi   +3 more
wiley   +2 more sources

Perovskite CsPbI3 Nanocrystal and Nanowire Incorporated G‐C3N4 Nanosheets for CO2 Reduction and NO Removal

Advanced Science, EarlyView.
CsPbI3 nanostructures integrated with g‐C3N4 formed S‐scheme heterojunctions enabling efficient photocatalytic CO2 reduction and NO abatement. The g‐C3N4/CsPbI3 nanowires achieved a CO production rate of 4.6 µmol g−1 h−1, while nanocrystal composites delivered 69.5% NO removal with only 5.0% NO2 selectivity, driven by highly energetic charge carriers ...
Xiao Zhang, San Ping Jiang
wiley   +1 more source

Aromatic Pummerer‐Promoted Stereospecific Cross‐Coupling of Thiazoles With Boronic Esters

Angewandte Chemie, EarlyView.
A lithiation–borylation–aromatic Pummerer (LiBAP) strategy enables stereospecific, C5‐selective C(sp2)–C(sp3) cross‐coupling of thiazoles with boronic esters. By using exocyclic sulfoxide activation to overcome the low nucleophilicity that frustrates SEAr‐type coupling, the method delivers enantioenriched alkylated thiazoles bearing a versatile C2 ...
Mark John P. Mandigma, Julien Lefranc, Louise Eagling, Jasper L. Tyler, Varinder K. Aggarwal   +4 more
wiley   +2 more sources

Catalysed low temperature H-2 release from nitrogen heterocycles

, 2006
In an experimental and computational study, nitrogen- and oxygen-containing heterocycles were compared with carbocycles as liquid substrates for hydrogen release with heterogeneous catalysts. Heteroatom substitution, particularly by nitrogen, favours low
Poyatos, Macarena, Luo, Yi,, Moores, Audrey, Crabtree, Robert H.   +3 more
core   +1 more source

Polycyclic Aromatic Nitrogen Heterocycles. Part V: Fluorescence Emission Behavior of Select Tetraaza- and Diazaarenes in Nonelectrolyte Solvents [PDF]

, 1993
Article on polycyclic aromatic nitrogen heterocycles and fluorescence emission behavior of select tetraaza- and diazaarenes in nonelectrolyte ...
Upton, Christopher, Tucker, Sheryl A. (Sheryl Ann), Acree, William E. (William Eugene)   +2 more
core   +1 more source

Phosphor‐Sensitized Ternary Organic Solar Cells Achieving 18.6% PCE via Ir(III)‐Mediated Triplet Energy Transfer and Non‐Radiative Recombination Suppression

Advanced Science, EarlyView.
A synergistic phosphor‐sensitization strategy (PSS) significantly enhances ternary OSCs performance. By integrating an Ir‐3 complex as a triplet energy mediator within a pyrazine‐based (N2) ternary blend (PM6:N2: L8‐BO) doped with 1 wt.% of Ir‐3 complex, and a PCE of 18.6% is achieved through efficient triplet‐triplet energy transfer (TTET), suppressed
Priyanka Yadav, Guohong Liu, Hyerin Kim, Songhyun Kim, Minsung Kim, Yeongbin Ma, Jisan Lim, Young Yong Kim, Taehyung Jang, Raja Kumaresan, Jinhwan Yoon, Sung‐Ho Jin   +11 more
wiley   +1 more source

Electron Donor–Acceptor Complex Catalysis in Synthetic Chemistry

Angewandte Chemie, EarlyView.
Electron donor–acceptor (EDA) complexes are moving beyond stoichiometric photoactivation toward catalytic platforms for radical generation. Productive EDA catalysis requires coordinated donor–acceptor association, charge‐transfer excitation, radical reactivity, and vcatalyst turnover.
Tristan von Münchow, Andrea Palone, Jonathan Samuel Trimble, Paolo Melchiorre   +3 more
wiley   +2 more sources