Results 81 to 90 of about 9,469,736 (295)
A new look at the substituent effect [PDF]
, 2017 Classical view on the substituent effect (SE) is associated with an empiric approach presented 80-years ago by Hammett [1]. He proposed a simple formula to represent the effect of a substituent upon the rate or equilibrium constants of a reaction in ...
Krygowski, T. M., Szatyłowicz, H.
core
Substituent-Dependent Magnetic Behavior of Discotic Benzo[e][1,2,4]triazinyls
, 2016 Discotic mesogens containing the benzo[e][1,2,4]triazinyl radical as the central unit exhibit a Colh phase below 80 °C. Depending on the substituent at the N(1) position, they show different modes of thermal expansion and magnetic behavior ...
Marcin Jasiński (1732258) +4 more
core +1 more source
Advanced Materials, EarlyView.Alkoxy chain length drives a continuous transition from eclipsed AA to a serrated, slipped AA* configuration over Co‐porphyrin COFs. A moderate slip both contracts the pore channel to enrich CO2 and suppress hydrogen evolution, and enhances collective high‐spin of Co sites, which delivers a record CO production rate with high selectivity.
Jie He +8 more
wiley +1 more source
Decoding Synergistic Pathways in Bimetallic MOFs for Advanced Oxidation Processes
Advanced Materials, EarlyView.This review presents a unified framework linking metal pairing and framework design with electronic structure, redox cycling, oxidant activation, reactive‐species generation, and catalytic performance across photocatalytic and oxidant‐based BMOF‐AOPs. The resulting design principles guide the development of hydrolytically stable and efficient BMOFs for
Karim El‐Naggar +2 more
wiley +1 more source
Advanced Materials, EarlyView.Stepwise dual‐side functionalization creates covalent Janus graphene with chemically and electrostatically asymmetric interfaces. The resulting nonadditive surface‐potential response and pronounced charge‐transport modulation demonstrate a versatile route for tailoring the electronic properties of graphene.
Shishi Liu +14 more
wiley +1 more source
Structural Analysis of 3,5-Bistrifluoromethylhydrocinnamic Acid
CrystalsThe crystal structure of 3,5-bistrifluoromethylhydrocinnamic acid [systematic name: 3-[3,5-bis(trifluoromethyl)phenyl]propanoic acid], C11H8F6O2, has been determined and described.
Piotr F. J. Lipiński, Krzysztof Łyczko
doaj +1 more source
Advanced Optical Materials, EarlyView.Light‐emitting Electrochemical Cells (LECs) are appealing electroluminescent devices with potential application in low‐cost, large‐area display technology and disposable devices. In the manuscript, a novel family of bright photo‐ and electro‐active heteroleptic silver(I) is presented and comprehensively investigated.
Valerio Giuso +5 more
wiley +1 more source
Substituent Effects in Ugi–Smiles Reactions
The Journal of Physical Chemistry A, 2013 In a recent communication, we described the mechanism of the well-known Ugi-type reactions with a model system (J. Org. Chem. 2012, 77, 1361-1366). Herein, focusing on the Ugi-Smiles coupling, we study the effects of each of the four reactants on the energy profile to further explain the experimental results.
Chéron, Nicolas +4 more
openaire +3 more sources
On relation between substituent effect and aromaticity in monocyclic systems [PDF]
, 2019 Aromaticity/aromatic and substituent/substituent effects belong to the most commonly used terms in organic chemistry and related fields. They are used for more than a century, and so far are the subject of thousands publications a year.
Krygowski, Tadeusz Marek +1 more
core
Advanced Optical Materials, EarlyView.The unique combination of photophysical properties for π‐expanded 1,4‐dihydropyrrolo[3,2‐b]pyrroles (DHPPs) can be reached via a new synthetic approach. π‐Expanded DHPPs possessing electron‐withdrawing functionalities with emission reaching 700 nm, as well as large double helical systems were prepared and investigated.
Damian Kusy +10 more
wiley +1 more source