Results 101 to 110 of about 4,840 (219)

Specific naked eye sensing of cyanide by chromogenic host: Studies on the effect of solvents

, 2020
We have synthesized receptor 1, which showed high selectivity toward CN- over other competitive anions in protic solvents. In addition, it distinguished CN- from other anions by color changes.
김영미, 김성진
core   +1 more source

Nitrogen‐Doped Mesoporous Carbon Loaded With Zn Single Atoms as a Catalyst for the Synthesis of 2,4(5)‐Diarylimidazoles

ChemistryOpen, Volume 15, Issue 11, November 2026.
A zinc single‐atom catalyst anchored on nitrogen‐doped mesoporous carbon (Zn@NMC) was synthesized via an evaporation‐induced self‐assembly method and applied in the one‐pot synthesis of 2,4(5)‐diarylimidazoles. The catalyst was fully characterized using FT‐IR, XRD, SEM, EDX, BET, and TGA analyses.
Maryam Shojaei‐Asl, Mohsen Moradian
wiley   +1 more source

Microwave-assisted extraction of Garcinia × mangostana L. and its ‘Mesta’ cultivar rinds: Physicochemical and antioxidant properties analyzed using multiple chemometric algorithms

Food Chemistry Advances
Mangosteen rind is an underutilized by-product rich in bioactive compounds. This study assessed the effect of microwave-assisted extraction (MAE) using different protic and aprotic solvents on the rinds of common mangosteen (Garcinia × mangostana L.) and
Peir Shinn Hew, Wen Jie Ng, Pei Jun Loh, Jiayang Ching, Kah Yaw Ee   +4 more
doaj   +1 more source

A Tale of Two Heterocycles: How Oxygen and Sulfur Shape Divergent Kemp Reactivity

Journal of Physical Organic Chemistry, Volume 39, Issue 11, November 2026.
Like benzisoxazoles, benzisothiazoles also undergo Kemp elimination, with rates accelerated by aprotic polar solvents and electron‐withdrawing groups. Oxygen‐containing heterocycles exhibit more localized negative charges than sulfur analogs, resulting in a more pronounced catalytic response to these environmental factors. ABSTRACT The Kemp elimination
Ella R. Jennings, Hannah S. Todd, Emilie Perelman, Courtney B. Limehouse, Hunter J. Savage, Marcello Forconi   +5 more
wiley   +1 more source

Bromination of Alkenes and Related Compounds by Use of Benzyltrimethylammonium Tribromide in Aprotic and Protic Solvents

The reaction of alkenes and related compounds (1) with benzyltrimethyl-ammonium tribromide (BTMA Br_3) in aprotic solvents such as dichloromethane and chloroform gave 1, 2-dibromo adducts in fairly good yields.
柿並, 孝明, Tashiro, Masashi, カジガエシ, ショウジ, Moriwaki, Masayuki, フジサキ, シズオ, タシロ, マサシ, 藤崎, 静男, カキナミ, タカアキ, Fujisaki, Shizuo, 梶返, 昭二, 田代, 昌士, Kajigaeshi, Shoji, Kakinami, Takaaki   +12 more
core  

Solvent effects and mechanism for a nucleophilic aromatic substitution from QM/MM simulations

, 2004
The nucleophilic aromatic substitution (SNAr) reaction between azide ion and 4-fluoronitrobenzene has been investigated using QM/MM and DFT/PCM calculations in protic and dipolar aprotic solvents.
Acevedo, Orlando, Jorgensen, William L
core   +1 more source

Challenges and Perspectives for an Extended Use of the Dye‐Sensitized Solar Cells

Solar RRL, Volume 10, Issue 20, 28 October 2026.
DSSC is a photoelectrochemical technology that will support the energy transition. DSSCs initiated the building‐integrated photovoltaics sector and are now proposed in agrivoltaics, archaeophotovoltaics and as indoor solution for powering the Internet of Things. The wavelength selectivity for photoconversion renders DSSCs unique in photovoltaics ambit.
Danilo Dini, Paolo Mariani, Erica Magliano, Daniele Franchi, Lorenzo Baldini, Marina Freitag, Marilena Carbone   +6 more
wiley   +1 more source

Molecular structural, vibrational spectra, dual descriptor, electronic transition and biological evaluations of ethyl 4‑hydroxy-3-methoxycinnamate using density functional theory

Chemical Physics Impact
Quantum chemical, spectroscopic and bioactivity studies of pharmacologically active Ethyl 4‑hydroxy 3‑methoxy ethyl cinnamate (EHMC) were investigated.
G. Bharathy, Johanan Christian Prasana, V.S. Jeba Reeda, M. Prasath, A. Manikandan   +4 more
doaj   +1 more source

Synthesis, crystal structure and physico-chemical properties of 3,3’-[(4-hydroxyphenyl)methyl] bis-(4-hydroxy-2H-chromen-2-one)

Acta Chimica Slovenica, 2014
The compound 3,3’-[(4-Hydroxyphenyl)methyl]bis-(4-hydroxy-2H-chromen-2-one) was synthesized by the Knoevenagel reaction. Crystals, suitable for X-ray data collection were grown by slow evaporation from an ethanol solution.
Denitsa Elenkova, Bernd Morgenstern, Ilia Manolov, Maria Milanova   +3 more
doaj  

A novel DHP-NH2 fluorescent dye for the determination of water content in organic solvents, rice, and aspirin: DFT calculations

Sensors International
A novel aminodihydropyridine derivative (DHP-NH2) was synthesized from hydrazine via a tandem cyclotrimerization of methyl propiolate. DHP-NH2 distinguishably exhibited either strong fluorescence in aprotic solvents or weak fluorescence in protic ...
Kittiporn Nakprasit, Panyakorn Taweechat, Pornthep Sompornpisut, Mongkol Sukwattanasinitt, Waroton Paisuwan, Anawat Ajavakom   +5 more
doaj   +1 more source