Results 151 to 160 of about 121,467 (287)

Hydrogen Isotope Exchange in Pyridine Catalyzed by an Iron(II) Imido Complex: Counterion‐Directed Regioselectivity

Angewandte Chemie, EarlyView.
Anionic high‐spin iron(II) imido complexes are catalysts for the hydrogen isotope exchange (HIE) reaction with pyridine as the substrate. The alkali metal counter‐cation plays critical roles in activating the substrate and facilitating deuteration. These complexes catalyze site‐selective α‐, α,β,γ‐, and β,γ‐deuteration of pyridine, where the counter ...
Bin Feng, Guorong Li, Yafei Gao, Nobuyuki Yamamoto, Maren Pink, Qian Peng, Jeremy M. Smith   +6 more
wiley   +2 more sources

Programming Palladium Cage Geometry through Ligand Redox Modulation

Angewandte Chemie, EarlyView.
A neutral redox‐active exTTF ligand (L) forms a Pd2L4 cage, whereas its oxidized form (Lox) yields a Pd2(Lox)2 macrocycle. Lox further assembles with a dibenzothiophene derivative (L′) into Pd2(Lox)(L′)2 and Pd4(Lox)4(L′)4 architectures. Reduction of Pd2(Lox)2 and Pd2(Lox)(L′)2 restores the parent Pd2L4 cage, enabling redox controlled nuclearity ...
Jennifer Bou Zeid, Jean Nicolas, Maksym Dekhtiarenko, David Canevet, Magali Allain, Vincent Carré, Frédéric Aubriet, Laura Neukirch, Elie Benchimol, Marc Sallé, Guido H. Clever, Sébastien Goeb   +11 more
wiley   +2 more sources

Wrinkled Strain‐Enriched High‐Entropy Metallene Enables Cross‐Site Tandem Nitrate‐to‐Ammonia

Angewandte Chemie, EarlyView.
A wrinkled 2D PdFeCoNiCuIn high‐entropy metallene overcomes the low atom utilization of high‐entropy alloys. Indium‐induced strain and p‐d hybridization enable a cross‐site tandem pathway for nitrate reduction to ammonia. It achieves 99.3% Faradaic efficiency and an NH3 yield rate of 4.55 mmol h−1 mgcat−1.
Tianfang Yang, Yang Liu, Menghao Kong, Shilong Li, Shizhe Liu, Guanjie He, Shuyan Gao   +6 more
wiley   +2 more sources

Room‐Temperature Gas‐Phase CO2‐to‐C3 Coupling by a 4f‐Aromatic Cluster

Angewandte Chemie, EarlyView.
We engineered a 4f metalla aromatic cluster, PrB2C2−, that enables efficient sequential C−C coupling with CO2 at room temperature, yielding a linear C3 backbone. This system provides a complete theoretical catalytic cycle and establishes a new design principle for lanthanide mediated CO2 activation.
Feng‐Xiang Zhang, Xiao‐Wang Li, Ning‐Zheng Li, Sheng‐Gui He, Yu‐Chen Zhang, Li‐Li Xing, Donald G. Truhlar, Jia‐Bi Ma   +7 more
wiley   +2 more sources

A Revised Model for Muscarine Biosynthesis Involving Lysine Trimethylation

Angewandte Chemie, EarlyView.
The fatal mushroom toxin l‐(+)‐muscarine is one of the most prominent natural products. We elucidated its biosynthetic origin in the sweating mushroom Collybia rivulosa based on incorporation of stable isotope‐labeled compounds and extensive mass spectrometric analyses.
Sebastian Dörner, Kai Rogge, Felix Trottmann, Christian Hertweck, Dirk Hoffmeister   +4 more
wiley   +2 more sources

DETECTION OF NITROGEN FIXATION WITH ISOTOPIC NITROGEN

Journal of Biological Chemistry, 1943
R.H. Burris, F.J. Eppling, H.B. Wahlin, P.W. Wilson   +3 more
openaire   +1 more source

Isotopes of nitrogen on Mars: Atmospheric measurements by Curiosity's mass spectrometer. [PDF]

Geophys Res Lett, 2013
Wong MH, Atreya SK, Mahaffy PN, Franz HB, Malespin C, Trainer MG, Stern JC, Conrad PG, Manning HL, Pepin RO, Becker RH, McKay CP, Owen TC, Navarro-González R, Jones JH, Jakosky BM, Steele A.   +16 more
europepmc   +1 more source

Solar‐Driven Ammonia Synthesis From Nitrate Reduction Paired With CO2 Capture for Sustainable Agriculture via a Robust CuPd Heterojunction

Angewandte Chemie, EarlyView.
Laser‐assisted synthesis of CuPd amorphous/crystalline heterojunction demonstrates >80% Faradaic efficiency for nitrate‐to‐ammonia electroreduction across wide potential windows. The integrated solar‐powered electrolyzer achieves 6% solar‐to‐ammonia energy efficiency at 0.4 sun, 6–20 mg h−1 CO2 capture rate, and stability exceeding 100 h.
Weihua Guo, Xiaofeng Huang, Yangbo Ma, Yun Song, Zihao Li, Qiang Zhang, Yinger Xin, Jianjun Su, Mingming He, Ruixuan Wang, Rui Xue, Xing Li, Shibo Xi, Jian Wang, Shenlong Zhao, Siwei Zhang, Ben Zhong Tang, Alex K. Y. Jen, Ruquan Ye   +18 more
wiley   +2 more sources

Noble Gas Isotopes and Nitrogen Isotopologues Reveal Deep Sources and Subsurface Fractionation in Yellowstone Gases. [PDF]

ACS Earth Space Chem
Broadley MW, Barry PH, Tyne RL, Bekaert DV, Karolyte R, Hudak MR, McPaul K, Ramirez CJ, Curtice J, Lloyd KG, Ballentine CJ, Marty B, Young ED, Seltzer AM.   +13 more
europepmc   +1 more source

Mixotrophy emerges as an optimal strategy in mature waters of the Amazon River plume. [PDF]

Commun Biol
Fernández-Carrera A, Choisnard N, Wodarg D, Liskow I, Subramaniam A, Montoya JP, Voss M, Loick-Wilde N.   +7 more
europepmc   +1 more source