Results 181 to 190 of about 1,023,840 (276)

Ground‐ and Excited‐State Mixed Valency in a 4,4′‐Bipyridine‐Bridged Bimetallic Di‐Ruthenium Complex

European Journal of Inorganic Chemistry, EarlyView.
Photoinduced mixed‐valence interactions across a 4,4′‐bpy bridge were studied. MLCT excited states in the bimetallic complex are longer‐lived than in the monometallic reference, thanks to metal–metal electronic coupling and hole delocalization, but are still shorter than the nanosecond timescale relevant for diffusional reactivity.
Ivana Ramírez‐Wierzbicki, Frank W. Heinemann, Leonardo D. Slep, Alejandro Cadranel   +3 more
wiley   +1 more source

Revista de Química: Volumen XXI –20 años de publicación continua

Revista de Química, 2007
Revista de Química Revista de Química
doaj  

A fluorescent probe under the microscope showing dual recognition of B-DNA and G-quadruplex DNA. [PDF]

Commun Chem
Gramolini L, López-Corbalán R, Marazzi M, García-Iriepa C.   +3 more
europepmc   +1 more source

Intramolecular Matere Bonds in Isostructural Rubidium (18‐Crown‐6) Pertechnetate and Perrhenate Dimers

European Journal of Inorganic Chemistry, EarlyView.
Two rubidium cations that are not fully encapsulated by 18‐crown‐6 are bridged by two pertechnetate units to form a dimer. These two pertechnetate units are nearly linearly aligned to each other to form Matere bonds (MaBs), a type of noncovalent σ‐hole interaction.
Clarence Yong, Sergi Burguera, Dennis Grödler, Christoph Lenting, Hakim Ibrahim, Mathias S. Wickleder, Antonio Frontera, Erik Strub   +7 more
wiley   +1 more source

Modulation of TSIL-Based Ciprofloxacin Structures with pH for the Selective Extraction of Rare Earth Metals, Uranium, Thorium, Titanium, and Zinc. [PDF]

ACS Omega
Lledó D, Grindlay G, Gunaratne HQN, de Cózar A, Sirvent A, Sansano JM.   +5 more
europepmc   +1 more source

Mechanistic Paths for the Gold(I)‐Catalyzed Heteroannulation of Salicylic Amides With Apolar Alkynes Explored With Density Functional Theory Calculations

European Journal of Organic Chemistry, EarlyView.
A manifold of catalytic reaction paths can operate in the Au(I)‐catalyzed heteroannulation of salicylic amides and alkynes. However, a subtle initial nucleophilic advantage of N versus O and a kinetic bottleneck at an advanced stage of the mechanistic machinery seems to suffice for the reaction to run on a single path and with exquisite selectivity. We
Ioannis Stylianakis, Evaggelia Vlachou, Carlos Silva López, Antonios Kolocouris   +3 more
wiley   +1 more source

Multimodal characterization of a pyrazolo[3,4-<i>b</i>]pyridine aldehyde: quantum chemical insights, NLO activity and VEGFR-2 docking/molecular dynamics. [PDF]

RSC Adv
Acosta-Quiroga K, Jiménez CA, Cobos-Montes K, Rodríguez-Núñez YA, López J, Guerra C, Calderón Orjuela DA, Gutierrez M, Polo-Cuadrado E.   +8 more
europepmc   +1 more source

1,1‐Disubstituted Vinylbromides: Versatile Building Blocks for the Synthesis of Nitrogen‐Containing Heterocycles

European Journal of Organic Chemistry, EarlyView.
1,1‐Disubstituted vinylbromides are key intermediates for constructing nitrogen‐containing heterocycles. This review provides an overview of the synthetic applications of 1,1‐disubstituted vinylbromides and summarizes recent developments in reaction methodologies, mechanistic insights, and the structural diversity of N‐heterocyclic compounds accessible
Anne Westermeyer, Jun Fang, Chonghuo Liu, Guillaume Lefèvre, Gérard Guillamot, Phannarath Phansavath, Virginie Ratovelomanana‐Vidal   +6 more
wiley   +1 more source

Identification of Secondary Metabolites from the Lichen <i>Hypotrachyna enderythraea</i> (Zahlbr.) Hale by HPLC-ESI-MS/MS. [PDF]

Molecules
Carrasco F, Hernández W, Castro N, Sivipaucar N, Bongiorno B, Chupayo O, Raposo C, Silva LA, Rodilla JM, Carrasco E, Dávalos JZ.   +10 more
europepmc   +1 more source

Investigating the Reactivity and Selectivity in Nucleophilic Fluorination of Secondary Alkyl Bromides and Mesylates: Assessment of the Effect of Counterion and Bulky Alcohols

European Journal of Organic Chemistry, EarlyView.
Hydrogen bonding provided by pinacol or 2‐trifluoromethyl‐2‐propanol enhances the selectivity of nucleophilic fluorination of several secondary alkyl bromides or mesylates. Synthesis of secondary alkyl fluorides via nucleophilic substitution faces the problem of high competition with E2 processes. This competition depends on the chemical environment of
Eloah P. Ávila, Luis F. Resende, Mauro V. de Almeida, Josefredo R. Pliego   +3 more
wiley   +1 more source