Results 11 to 20 of about 3,195 (187)

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents, Part I: Pyridine mono-carboxylic acids [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.
Marinković Aleksandar D., Drmanić Saša Ž., Jovanović Bratislav Ž., Mišić-Vuković Milica M.   +3 more
doaj   +1 more source

Post-modification of PLLA nanofiber nonwovens by various solvent treatments

Current Directions in Biomedical Engineering, 2023
Degradable polymeric Biomaterials, such as polylactic acid, are widely used in medical field as bioresorbable implant coatings. More recently, stent covers, implantable tubes or wound dressings made from electrospun nanofibers have been developed.
Götz Andreas, Reske Thomas, Oschatz Stefan, Grabow Niels, Illner Sabine   +4 more
doaj   +1 more source

Solvent effect on electronic absorption spectra of some 2-aminobenzimidazoles [PDF]

Acta Periodica Technologica, 2002
The effect of protic and aprotic solvents on electronic apsorption spectra of 1-(3-X-benzil)-2-aminobenzimidazoles (X=CH3;OCH3; Cl) was examined. UV-apsorption spectra (200-400 nm) were recorded in five protic and four aprotic solvents. Batochromic shift
Perušić-Janjić Nada U., Janjić Jevrem D., Podunavac-Kuzmanović Sanja O.   +2 more
doaj   +1 more source

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

The Role of Solvent on the Kinetics and Mechanism of the Hydrolysis of Salicylidene Benzoyl Hydrazone [PDF]

مجلة جامعة النجاح للأبحاث العلوم الطبيعية, 1988
The effect of various solvents on the kinetics and mechanism of the hydrolysis of Salicylidene Benzoyl hydrazone (SBH) has been studied at five different temperatures (17-45 C) using U.V. and visible spectrophotometry. In both protic and aprotic solvents,
Maher Abu-Eid
doaj   +1 more source

Poly(Pyridinium Salt)s Containing 2,7-Diamino-9,9′-Dioctylfluorene Moieties with Various Organic Counterions Exhibiting Both Lyotropic Liquid-Crystalline and Light-Emitting Properties

Molecules, 2021
A series of poly(pyridinium salt)s-fluorene main-chain ionic polymers with various organic counterions were synthesized by using ring-transmutation polymerization and metathesis reactions. Their chemical structures were characterized by Fourier Transform
Pradip K. Bhowmik, Tae S. Jo, Jung J. Koh, Jongwon Park, Bidyut Biswas, Ronald Carlo G. Principe, Haesook Han, András F. Wacha, Matti Knaapila   +8 more
doaj   +1 more source

Facile Synthesis of Functionalized Phenoxy Quinolines: Antibacterial Activities against ESBL Producing Escherichia coli and MRSA, Docking Studies, and Structural Features Determination through Computational Approach

Molecules, 2022
The synthesis of new 6-Bromoquinolin-4-ol derivatives (3a–3h) by Chan–Lam coupling utilizing different types of solvents (protic, aprotic, and mixed solvents) and bases was studied in the present manuscript.
Mahwish Arshad, Nasir Rasool, Muhammad Usman Qamar, Syed Adnan Ali Shah, Zainul Amiruddin Zakaria   +4 more
doaj   +1 more source

Thermal stability and photochromic properties of a fluorinated indolylfulgimide in a protic and aprotic solvent [PDF]

Journal of Photochemistry and Photobiology A: Chemistry, 2008
The photochromic properties and thermal stability of a newly synthesized fluorinated N-ethoxycarbonylmethyl indolylfulgimide substituted on the imide nitrogen were examined in a protic and aprotic environment. The absorption spectra and extinction coefficients of the Z- and C-forms of the fluorinated indolylfulgimide (open and closed, respectively ...
Nadezhda I, Islamova, Xi, Chen, Jessica A, Digirolamo, Yenia, Silva, Watson J, Lees   +4 more
openaire   +2 more sources

Theoretical Investigation of Solvation Effects on the Tautomerism of Maleic Hydrazide

E-Journal of Chemistry, 2012
A DFT study is used to calculate structural data of tautomers of maleic hydrazide (MH) in the gas phase and selected solvents such as benzene (non-polar solvent), tetrahydrofuran (polar aprotic solvent) and methanol (protic solvent), dimethyl sulfoxide ...
Meisam Shabanian, Hassan Moghanian, Mohsen Hajibeygi, Azin Mohamadi   +3 more
doaj   +1 more source

Investigation of solvent effects on electronic absorption spectra of some substituted 1,2,4-triazoline-3-thiones

Macedonian Journal of Chemistry and Chemical Engineering, 2010
The influence of the polarity of the solvent and hydrogen bonding on the electronic absorption spectra of some previously synthesized substituted 1,2,4-triazoline-3-thiones was studied.
Mirjana Jankulovska, Lidija Šoptrajanova, Ilinka Spirevska, Katica Čolančevska-Ragenoviќ, Saško Ristovski   +4 more
doaj   +1 more source