Results 11 to 20 of about 4,840 (219)

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents. [PDF]

Journal of the Serbian Chemical Society, 2005
Rate constants for the reaction of diazodiphenylmethane with isomeric pyridine carboxylic acids were determined in chosen protic and aprotic solvents at 30 °C, using the well known UV spectrophotometric method.
ALEKSANDAR D. MARINKOVIC, SASA Z. DRMANIC, BRATISLAV Z. JOVANOVIC, MILICA MISIC-VUKOVIC   +3 more
doaj   +2 more sources

Cellulose swelling by aprotic and protic solvents: What are the similarities and differences?

Macromolecular Chemistry and Physics, 2008
The swelling of microcrystalline, native and mercerized cotton and eucalyptus celluloses by 16 aprotic solvents was investigated. The number of moles of solvent/anhydroglucose unit, nSw, correlates well with solvent molar volume, basicity and dipolarity ...
FIDALE, Ludmila C., RUIZ, Naiara, SEOUD, Omar A. El, HEINZE, Thomas   +3 more
core   +2 more sources

Universal Trends between Acid Dissociation Constants in Protic and Aprotic Solvents. [PDF]

Chemistry, 2022
AbstractpKa values in non‐aqueous solvents are of critical importance in many areas of chemistry. Our knowledge is, despite their relevance, still limited to the most fundamental properties and few pKa values in the most common solvents. Taking advantage of a recently introduced computationally efficient procedure we computed the pKa values of 182 ...
Busch M, Ahlberg E, Laasonen K.
europepmc   +5 more sources

Spectroscopic behavior of pyrrolanthrone and its derivative in aprotic and protic solvents [PDF]

International Conference on Atomic and Molecular Pulsed Lasers XIII, 2018
Recently synthesized pyrrolanthrone, naphtho[1,2,3-cd]indole-6(2H)-one (PyAn), and its water-soluble derivative, 3(naphtho[1,2,3-cd]indole-6(2H)-one-2-yl) sodium propylsulfonate, are very promising for anticancer therapy due to both the fluorescent and ...
Slyusareva, E. A., Герасимова, M. A., Merezhko, A. G., Gerasimova, M. A., Gornostaev, L. M., Tropina, D. A., Alena Merezhko, Evgenia Slyusareva, Leonid Gornostaev, Marina Gerasimova, Darya Tropina   +10 more
core   +6 more sources

Broadband fluorescence reveals mechanistic differences in excited-state proton transfer to protic and aprotic solvents. [PDF]

Chem Sci, 2020
Excited-state proton transfer (ESPT) to solvent is often explained according to the two-step Eigen-Weller model including a contact ion pair (CIP*) as an intermediate, but general applicability of the model has not been thoroughly examined.
Verma P, Rosspeintner A, Dereka B, Vauthey E, Kumpulainen T.   +4 more
europepmc   +2 more sources

Solvent-Free Synthesis of Ultrabright Carbon Dots With Near-Unity Quantum Yield for High-Performance Light-Emitting Diodes. [PDF]

Adv Sci (Weinh)
A rational, solvent‐free synthesis utilizing 2,6‐diaminonaphthalene produces ultrabright green‐emissive carbon dots. Regulated by a self‐limiting oxidative capping mechanism, excitons undergo ultrafast intra‐particle funneling from the nitrogen‐doped carbon core to emissive surface traps.
Park H, Lee SH, Seo S, Park S, Ji SM, Jo H, Park S, Kim YH, Kwon W.   +8 more
europepmc   +2 more sources

Linker-Locking Strategy for the Rigidification of Flexible Metal-Organic Framework: Structural Stabilization and Controlled ESIPT for H₂O/D₂O Sensing. [PDF]

Adv Sci (Weinh)
A linker‐locking strategy rigidifies the flexible metal–organic framework (MOF) MIL‐53‐(OH)2 via the cooperative encapsulation of ligands and structural water. This network significantly enhances the framework's aqueous stability. Crucially, rigidification suppresses enol emission to yield a single keto tautomer state with an extended lifetime ...
Sharma A, Lee S, Park SI, Nho HW, Seong J, Lee E, Kwon OH, Lah MS, Lim J.   +8 more
europepmc   +2 more sources

Photooxidative cleavage of oxazoline-2-thione in protic and aprotic solvents

Bulletin of the Chemical Society of Ethiopia, 1999
Indra Sen Singh
doaj   +4 more sources

Solubility and Dissolution Thermodynamic Data of Mefenamic Acid Crystals in Different Classes of Organic Solvents [PDF]

, 2013
Different classes of solvents provide different polarity values, which influence the solubility of pharmaceutical solids. In this article, the solubility of mefenamic acid in different classes of organic solvents, including polar protic, dipolar aprotic ...
Parveen, Jamal, Siti Kholijah, Abdul Mudalip, Fatmawati, Adam, Mohd R., Abu Bakar, Adam, Fatmawati, Jamal, Parveen, Abdul Mudalip, Siti Kholijah, Abu Bakar, Mohd Rushdi   +7 more
core   +2 more sources

Effects of solvent and structure on the reactivity of 6-substituted nicotinic acids with diazodiphenylmethane in aprotic solvents [PDF]

Journal of the Serbian Chemical Society, 2009
The rate constants for the reactions of diazodiphenylmethane (DDM) with 6-substituted nicotinic acids in aprotic solvents at 30°C were determined. The obtained second order rate constants in aprotic solvents, together with literature data for benzoic and
Drmanić Saša Ž., Marinković Aleksandar D., Jovanović Bratislav Ž.   +2 more
doaj   +3 more sources