Results 191 to 200 of about 59,325 (262)

Benzo[1,2-<i>b</i>:3,4-b':5,6-<i>b</i>″]trithieno[3,2-<i>b</i>:6,5-<i>b</i>':9,8-<i>b</i>″]trithiophene: A Thiophene-Rich 3-Fold Symmetric Building Block for π-Extended Materials. [PDF]

Org Lett
Pal P, Bulgarevich K, Takimiya K.
europepmc   +1 more source

Selective Nitrate Transmembrane Transport Through Adaptive Weak C─H Bonding Cyanostilbene Water Channels

Angewandte Chemie, EarlyView.
Here we demonstrate that weak HB CH donor cyanostilbenes promote water/ion transport through their ability to form less‐ordered transient water channels within the lipid bilayer with increased water permeability and NO3−/ Cl− selectivity. ABSTRACT Transmembrane water transport strongly depends on how dynamic, translocating water clusters are stabilized
Ioan Stroia, Dan‐Dan Su, Yuhao Li, Niculina Hadade, Ion Grosu, Arie van der Lee, Mihail Barboiu   +6 more
wiley   +1 more source

Can Entropically Unfavorable Topological Hydrogen-Bonded Networks Form From Tetrakis- or Pentakis(4-Carboxyphenyl)benzene Derivative? [PDF]

Small
Maeda R, Oketani R, Shiga K, Tohnai N, Hisaki I.   +4 more
europepmc   +1 more source

Pyridine C─N Transposition via Cycloaddition–Cycloreversion

Angewandte Chemie, EarlyView.
Transposition of pyridine nitrogen from the 4‐ to the 3‐position is described using two open and shut sequences: a nucleophile addition ring‐open ring‐closure, followed by a nitrile Diels–Alder cycloaddition cycloreversion. The nitrogen swap is particularly effective for tertiary alkyl substituents, transforming easily accessible para‐alkylated ...
Aífe Conboy, Michael F. Greaney
wiley   +1 more source

Substituent and Ring-Number Effects on the Kinetics of PAH + OH Reactions: A QSAR-DOE Approach with Tunneling Corrections. [PDF]

Molecules
Parzych C, Baradyn M, Ratkiewicz A.
europepmc   +1 more source

Direct δ‐Lactone Synthesis From Free Alcohols via Photoinduced δ‐C(sp3)–H Carbonylation in Flow

Angewandte Chemie, EarlyView.
Herein, we have developed a photo‐flow platform for the δ‐C(sp3)─H carbonylative lactonization of free alcohols with carbon monoxide. The transformation integrates alkoxyl radical generation, selective 1,5‐HAT, CO incorporation, and radical–polar crossover to enable direct access to δ‐lactones from simple alcohol precursors.
Prakash Chandra Tiwari, Runkang Liu, Timothy Noël   +2 more
wiley   +1 more source

Use of a Zwitterionic Isoquinolinium Dye as a Solvatochromic Indicator: Structure of the Microsphere of Solvation and Explicit Solvation Modeling. [PDF]

J Phys Chem B
Avadanei OG, Dorohoi DO, Avadanei MI.
europepmc   +1 more source

Isolation of a Highly Reactive CBNC Heterocumulene via Azidoborylene Photolysis: Facile Access to a Crystalline Dioxaborirane

Angewandte Chemie, EarlyView.
Azidoborylene photolysis results in the isolation of a reactive C═B═N═C heterocumulene bearing an ambiphilic boron centre. Addition of 3O2 to this species results in the clean conversion to a unique example of a dioxaborirane. ABSTRACT Oxidation of the formal boron(0) complex MeCAAC2B in the presence of tetrabutylammonium azide leads to the formation ...
Hayley King, Vignesh Pattathil, William Kennedy, Robert K. Szilagyi, Conor Pranckevicius   +4 more
wiley   +1 more source

Sulfonic-acid functionalized hypercrosslinked porous organic polymer as a highly efficient heterogeneous catalyst for synthesis of 2<i>H</i>-chromene derivatives. [PDF]

RSC Adv
Somprasong S, Ratvijitvech T, Tiyawarakul T, Rujirasereesakul C, Sitthasakul T, Luanphaisarnnont T.   +5 more
europepmc   +1 more source

Ketazine‐Linked Covalent Organic Framework for Metal‐Free Electrocatalytic Nitrate‐to‐Ammonia Conversion

Angewandte Chemie, EarlyView.
A metal‐free fluorinated ketazine‐linked COF is introduced as an efficient electrocatalyst for nitrate reduction to ammonia under neutral conditions. Fluorine substitution enhances π–π stacking and crystallinity, enabling a Faradaic efficiency of 59.9% and an NH3 yield rate of 1639.9 µmol h−1 mgCOF−1 at −0.9 V versus RHE. This establishes an unexplored
Islam E. Khalil, Ashadul Adalder, Badr Elkamash, Narad Barman, Darosch Asgari, Luoxing Xiang, Warisha Tahir, Franziska Hess, Ranjit Thapa, Adisak Boonchun, Uttam Kumar Ghorai, Prasenjit Das, Arne Thomas   +12 more
wiley   +1 more source