Results 71 to 80 of about 430,530 (226)

Recent Advances in the Synthesis and Applications of Nitrogen-Containing Macrocyclic Arenes

Molecules
Macrocyclic arenes are rich-electron macrocycles bridged by methylene or methyl groups from aromatic rings substituted by hydroxyl or alkoxy groups. It has attracted great interest in host–guest chemistry and supramolecular self-assembly due to its clear
Jianhang Hu, Wanhua Wu, Cheng Yang
doaj   +1 more source

Potentiometric Carboxylate Sensors Based on Carbazole-Derived Acyclic and Macrocyclic Ionophores

Chemosensors, 2020
Solid-contact ion-selective electrodes with carbazole-derived ionophores were prepared. They were characterized as acetate sensors, but can be used to determine a number of carboxylates. The potentiometric response characteristics (slope, detection limit,
Ville Yrjänä, Indrek Saar, Mihkel Ilisson, Sandip A. Kadam, Ivo Leito, Johan Bobacka   +5 more
doaj   +1 more source

Experimental and Computational Investigation of an “Open” Transonic Cavity Flow [PDF]

, 2009
This paper presents an investigation of a transonic flow (M∞ = 0.85) over a rectangular cavity having a length-to-depth ratio of 5. Velocities were measured inside the cavity on the central plane and two off-centre planes using a two-component particle ...
Knowles, Kevin, Atvars, K., Ritchie, S. A., Lawson, Nicholas J.   +3 more
core   +4 more sources

Crystal structure of tetraaqua(dimethylformamide)tetrakis(μ-N,2-dioxidobenzene-1-carboximidato)tetrakis(μ-trimethylacetato)tetramanganese(III)sodiumyttrium–dimethylformamide–water (1/8.04/0.62)

Acta Crystallographica Section E: Crystallographic Communications, 2015
The synthesis and crystal structure for the title compound, [YNaMn4(C7H4NO3)4(C5H9O2)4(H2O)3.76(C3H7NO)0.24]·8.04C3H7NO·0.62H2O or [YIIINa(OTMA)4[12-MCMn(III)N(shi)-4](H2O)3.76(DMF)0.24·8.04DMF·0.62H2O, where OTMA is trimethylacetate, MC is metallacrown,
Jordan R. Travis, Matthias Zeller, Curtis M. Zaleski   +2 more
doaj   +1 more source

Atroposelective Access to Bicyclic Peptides via an Amide Photocaging Strategy

Angewandte Chemie International Edition, EarlyView.
Ansamers are an atypical class of atropisomers (Pansa/Mansa) and stereoselective synthesis of its two conformational isomers is challenging. We introduce a photocaged amide protection strategy: photolabile groups in monocycles reversibly modulate amide geometry, biasing macrolactamization to selectively give Pansa or Mansa.
Haijian Yang, Joseph De Luna, Hui Pan, Jiyong Park, Wu Su, Mu‐Hyun Baik, Roderich D. Süssmuth, Guiyang Yao   +7 more
wiley   +1 more source

A dodecamethoxy[6]cycloparaphenylene consisting entirely of hydroquinone ethers: unveiling in-plane aromaticity through a rotaxane structure

Nature Communications, 2023
[n]Cycloparaphenylenes ([n]CPPs, where n is the number of phenylene groups), consisting of 1,4-linked phenylene unit, have attracted much attention due to their cyclic π-conjugated structures and physical properties.
Naoki Narita, Yusuke Kurita, Kohtaro Osakada, Tomohito Ide, Hidetoshi Kawai, Yoshitaka Tsuchido   +5 more
doaj   +1 more source

Synthesis and host-guest chemistry of a thiophene-extended pillar[6]arene: toward applications in nitroaromatics removal and cell imaging

Frontiers in Chemistry
Over the past decade, significant progress has been made in the study of pillar [n]arenes; however, the development of their analogs remains underexplored, offering new opportunities for the discovery of functional materials.
Tingting Chen, Fengqin Wang
doaj   +1 more source

Macrocycle-assembled membranes for high-salinity organic wastewater treatment

Nature Communications
Membrane processes offer a promising pathway for selectively separating organics and salts to enable water reuse and resource recovery. While polymeric membranes incorporating macrocyclic molecules that feature amphiphilic nature and tunable cavities are
Yizhuo Li, Yanghua Duan, Jingsi Yuan, Lei Ge, Xiang Zhang, Jingwei Hou, Yatao Zhang, Bart Van der Bruggen, Junyong Zhu, Menachem Elimelech   +9 more
doaj   +1 more source

Crystal structure and supramolecular features of a host–guest inclusion complex based on A1/A2-hetero-difunctionalized pillar[5]arene

Acta Crystallographica Section E: Crystallographic Communications
A host–guest supramolecular inclusion complex was obtained from the co-crystallization of A1/A2-bromobutoxy-hydroxy difunctionalized pillar[5]arene (PilButBrOH) with adiponitrile (ADN), C47H53.18Br0.82O10·C6H8N2.
Mickey Vinodh, Talal F. Al-Azemi
doaj   +1 more source

Tetraphenylethylene-Architected Macrocyclic Arene: A Large Language Model-Enabled Förster Resonance Energy Transfer-Optimized System for Advanced Anti-Counterfeiting Applications

A novel macrocyclic arene (TPE-arene) featuring a rhombic Biphen[n]arenes-like cavity and two tetraphenylethylene units was successfully synthesized.
Jiacheng Yang, Yan-Qing Fan, Shicheng Chen, Hongyue Gao, Jingya Wang, Qian Zhang, Ke Li, Abudu Rexit Abulikemu, Xiaoming Wang, Jing Zeng   +9 more
core   +1 more source