Results 91 to 100 of about 26,157 (280)

Ionic Liquid-Based Ultrasonic-Assisted Extraction of Alkaloids from Cacao (Theobroma cacao)

Chemical Engineering Transactions, 2018
Recent advances in the solid-liquid extraction have brought a large number of new techniques as ultrasonic assisted extraction (UAE). Different solvents such as alcohols, acetonitrile and chloroform are reported as extractors of added-value compounds ...
N.S. De Oliveira, A.S. Carlos, S. Mattedi, C.M.F. Soares, R. Lucena De Souza, A. Fricks, A. Silva Lima   +6 more
doaj   +1 more source

Chemical control of the viscoelastic properties of vinylogous urethane vitrimers [PDF]

, 2017
International ...
Denissen, Wim, Droesbeke, Martijn, Du Prez, Filip, Leibler, Ludwik, Nicolay, Renaud, Winne, Johan   +5 more
core   +3 more sources

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

Chemistry – A European Journal, EarlyView.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

Elucidating the Solvent-Dependent Solvation and Structural Stability of Irinotecan: A Molecular Simulation Study. [PDF]

Chemphyschem
The solvation preference of irinotecan is governed by a competition between cavity formation and electrostatic stabilization. Computations reveal that the high cost of breaking water's hydrogen bond network outweighs its electrostatic benefits. In contrast, polar aprotic solvents (e.g., pyridine) offer an optimal thermodynamic balance, providing strong
Bitabo MM, Mlowe S, Shadrack DM, Paluch AS, Paul L.   +4 more
europepmc   +2 more sources

Photoinduced Electron Transfer (PET) as Key to Accelerate the Cycloreversion Reaction of Arylquadricyclanes

Chemistry – A European Journal, EarlyView.
It is demonstrated that the photoinduced cycloreversion of a methoxynaphthylquadricyclane in the presence of suitable photocatalysts gives quantitatively the corresponding norbornadiene. As this photochromic norbornadiene‐quadricyclane cycle has favorable properties for light energy conversion, this method provides a useful tool for the targeted ...
Julian Felix Maria Hebborn, Heiko Ihmels, Marco Löcker, Thomas Paululat, Robin Schulte   +4 more
wiley   +1 more source

A Method of Calculating the Kamlet–Abboud–Taft Solvatochromic Parameters Using COSMO-RS

Molecules, 2019
There is demand for safer and bio-based solvents, brought on by legislation and sustainability objectives. The prediction of physical properties is highly desirable to help design new molecules.
James Sherwood, Joe Granelli, Con R. McElroy, James H. Clark   +3 more
doaj   +1 more source

Fluorescence, Absorption, Chromatography and Structural Transformation of Chelerythrine and Ethoxychelerythrine in Protic Solvents: A Comparative Study. [PDF]

Molecules, 2022
Cao J, Zheng Y, Liu T, Liu J, Liu J, Wang J, Sun Q, Li W, Wei Y.   +8 more
europepmc   +1 more source

Transitioning Formamide Solvothermal Syntheses of MOFs to Less Toxic Solvents

Chemistry – A European Journal, EarlyView.
Metal‐organic Frameworks (MOFs) are commonly synthesized in toxic formamide solvents. This study investigates the synthetic factors required for effective removal of formamides across various classes of MOFs, providing a foundation for designing new sustainable MOF syntheses.
Julia C. Donovan, Evelyn C. Peterson, Adam J. Matzger   +2 more
wiley   +1 more source

Synthesis and Characterization of Trivalent Cerium Complexes of p-tert-Butylcalix[4,6,8]Arenes: Effect of Organic Solvents

Journal of Chemistry, 2013
Reaction of Ce3+ with p-tert-butylcalix[n]arene (n=4,6,8) yields purple crystalline complexes structurally as [Ce(p-tert-butylcalix[4]arene-3H)2(NO3)(DMF)x](2 − x)DMF (1), [Ce(p-tert-butylcalix[6]arene-4H)2(NO3)(DMF)x](3 − x)DMF (2), and [Ce(p-tert ...
Md. Hasan Zahir
doaj   +1 more source

Room‐Temperature Helix‐to‐Disc Conversion of Thia[6]helicene S,S‐Dioxides to Coronene via In Situ Phenoxide Anion Generation

Chemistry – A European Journal, EarlyView.
In situ phenoxide formation at the benzene terminus triggers room‐temperature conversion of thia[6]helicene S,S‐dioxides to coronene. The solubility contrast drives product precipitation, enabling isolation by simple filtration. This pericyclic annulation between the helical termini provides direct access to coronene‐type planar architectures ...
Kaito Seino, Takashi Murase
wiley   +1 more source