Results 51 to 60 of about 2,396 (173)

Metal‐Free Ligand‐Centered Radical Scavenging in Pyridine‐Modified Tetraaza Macrocycles

European Journal of Organic Chemistry, EarlyView.
Ligand‐centered hydrogen‐atom transfer in pyridinophane macrocycles generates delocalized radicals, with Py2N2 enabling cooperative captodative stabilization and enhanced DPPH• quenching. Pyridine‐modified tetraaza macrocycles are widely studied as ligand platforms for metal coordination, yet their intrinsic redox and radical reactivity in the absence ...
Christina Mantsorov, Hannah K. Pyle, Tahmina Afroz, Caden‐Jack N. Walls, Nora Del Bosque, Timothy M. Schwartz, Chelsea N. Miller, Kristof Pota, Benjamin G. Janesko, Kayla N. Green   +9 more
wiley   +1 more source

Using a social‐ecological macrosystems framework to understand how human activities alter ecological synchrony

People and Nature, EarlyView.
Abstract Different aspects of ecological systems, biotic or abiotic, often fluctuate in coordinated patterns over space and time. Such high concordance between ecological processes is often referred to as ecological synchrony. Human activities, including and beyond climate change, have the potential to alter ecological synchrony by disrupting or ...
Yiluan Song, Mallory Barnes, K. Ann Bybee‐Finley, Kyla M. Dahlin, Travis McDevitt‐Galles, Stephan B. Munch, Guillermo E. Ponce‐Campos, Casey Youngflesh, Benjamin Zuckerberg, Kai Zhu   +9 more
wiley   +1 more source

Equilibrium constants and protonation site for N-methylbenzenesulfonamides

Beilstein Journal of Organic Chemistry, 2011
The protonation equilibria of four substituted N-methylbenzenesulfonamides, X-MBS: X = 4-MeO (3a), 4-Me (3b), 4-Cl (3c) and 4-NO2 (3d), in aqueous sulfuric acid were studied at 25 °C by UV–vis spectroscopy.
José A. Moreira, Ana M. Rosa da Costa, Luis García-Río, Márcia Pessêgo   +3 more
doaj   +1 more source

Computational design of poly(p‐phenylene vinylene)‐based gas sensors: tunable reactivity and selectivity via side‐group functionalization

Polymer International, EarlyView.
Side‐group functionalization enhances the reactivity and optoelectronic properties of poly(p‐phenylene vinylene) (PPV) derivatives for chemical sensing. PPV‐CN and PPV‐NO2 display strong interactions and pronounced responses, providing molecular‐level insights for designing high‐performance polymer‐based sensors.
Bruno Hori Barboza, Rosangela A Maia, João Paulo Cachaneski‐Lopes, Augusto Batagin‐Neto   +3 more
wiley   +1 more source

Outer‐Sphere Tuning of Synthetic Iron–Sulfur Clusters Within Nanoscale Cage Frameworks

Small, EarlyView.
Noncovalent encapsulation of a synthetic iron–sulfur cluster within hydrophobic, naphthalenediimide (NDI)‐paneled cages is shown to lead to dramatic changes in the electronic structure and covalency of the Fe─S core. ABSTRACT As atomic‐scale archetypes for multi‐electron transfer, iron–sulfur clusters are compelling candidates for the design of redox ...
Rupal Baliyan, Shelby T. Davis, Jan‐Niklas Boyn, Gwendolyn A. Bailey   +3 more
wiley   +1 more source

Creating a Masterpiece. The Road to (and Beyond) Woodward and Hoffmann's 1969 Angewandte Chemie Treatise

The Chemical Record, EarlyView.
This publication describes how R. B. Woodward and Roald Hoffmann crafted their masterpiece publications. Illustrations include Woodward's first draft of the famous “Violations There are none. Nor can violations be expected of so fundamental a principle of maximum bonding.” Original but discarded text shows the stepwise paths toward the W‐H masterpieces.
Jeffrey I. Seeman
wiley   +1 more source

The Internal Relation between Quantum Chemical Descriptors and Empirical Constants of Polychlorinated Compounds

Molecules, 2018
Quantum chemical descriptors and empirical parameters are two different types of chemical parameters that play the fundamental roles in chemical reactivity and model development.
Jiangchi Fei, Qiming Mao, Lu Peng, Tiantian Ye, Yuan Yang, Shuang Luo   +5 more
doaj   +1 more source

Premarital Cohabitation and Intimate Partner Violence in Urban China: Evidence From Beijing

Journal of Marriage and Family, Volume 88, Issue 4, Page 1004-1022, August 2026.
ABSTRACT Objective This study contributes to the emerging literature on cohabitation and marital outcomes in urban China by examining the associations between premarital cohabitation and six types of intimate partner violence (IPV). Background Premarital cohabitation has been on the rise, yet its evolving meanings and long‐term implications for post ...
Yexin Zheng, Zheng Mu, Ting Li
wiley   +1 more source

A Ruthenium‐(Ph‐BPE) Catalyst for Asymmetric Alkynylation of Fluoral: Enantioselection From 1 of 12 Fluxional Stereogenic‐at‐Ruthenium Complexes

Angewandte Chemie International Edition, Volume 65, Issue 30, 20 July 2026.
The first enantioselective alkynylations of aqueous fluoral are described. These processes are catalyzed by an iodide‐bound ruthenium‐(Ph‐BPE)‐catalyst; an octahedral metal complex that can exist as 12 diastereomeric‐at‐metal isomers. Calculations reveal that 2 of 12 stereoisomeric complexes account for 99.9% of the Boltzmann population and that ...
Weijia Shen, Sebastian Höthker, Colin E. Hayter, Nicholas K. Bowers, Andrea Pellegrini, Stefan Grimme, Michael J. Krische   +6 more
wiley   +1 more source

Probing 5‐Nitroimidazole‐Triazole Hybrids as Potential Anti‐Kinetoplastid Agents: Synthesis and In Vitro Efficacy

ChemMedChem, Volume 21, Issue 13, 14 July 2026.
A series of 5‐nitroimidazole‐1,2,3‐triazole hybrids was synthesised and evaluated for antitrypanosomatid activity to assess their potential as treatments against leishmaniasis and trypanosomiasis. No notable in vitro activity against Leishmania was detected.
Liandi Ferreira, Gideon D. Badenhorst, Janine Aucamp, Keisuke Suganuma, David D. N’Da   +4 more
wiley   +1 more source