Browsing Τμήμα Χημείας / Department of Chemistry by Title
Now showing items 1193-1212 of 1302
-
Article
Three different types of quasi-model networks: Synthesis by group transfer polymerization and characterization
(2007)Group transfer polymerization (GTP) chemistry was employed for the preparation of polymethacrylate networks of controlled structure (quasi-model networks) of three different types: (a) regular quasi-model networks, in which ...
-
Article
Three-step synthesis of ethyl canthinone-3-carboxylates from ethyl 4-bromo-6-methoxy-1,5-naphthyridine-3-carboxylate via a Pd-catalyzed Suzuki-Miyaura coupling and a Cu-catalyzed amidation reaction
(2011)Ethyl canthin-6-one-1-carboxylate (1b) and nine analogues 1c-k were prepared from readily prepared ethyl 4-bromo-6-methoxy-1,5-naphthyridine-3- carboxylate (2b) via a three-step non-classical approach that focused on ...
-
Article
Time resolved infrared absorption studies of geminate recombination and vibrational relaxation in OCIO photochemistry
(2004)The first ultrafast time-resolved infrared absorption studies of the geminate recombination and vibrational relaxation dynamics of aqueous chlorine dioxide (OCIO) were presented. The rapid increase in optical density ...
-
Article
Time-Resolved Resonance Raman and Time-Resolved Step-Scan FTIR Studies of Nitric Oxide Reductase from Paracoccus denitrificans: Comparison of the Heme b3-FeB Site to That of the Heme-CuB in Oxidases
(2003)Time-resolved resonance Raman (TR3) and time-resolved step-scan (TRS2) FTIR spectroscopies have been used to probe the structural dynamics at the heme b3 proximal and distal sites after carbon monoxide photolysis from fully ...
-
Article
Time-resolved resonance Raman studies of halooxide photoisomerization kinetics
(2003)The condensed-phase photoisomerization dynamics of chlorine dioxide and dichlorine monoxide are investigated using femtosecond pump-probe and time-resolved resonance Raman. These studies demonstrate that photoisomerization ...
-
Article
A Time-Resolved Resonance Raman Study of Chlorine Dioxide Photochemistry in Water and Acetonitrile
(1999)The photochemistry of chlorine dioxide (OClO) in water and acetonitrile is investigated using time-resolved resonance Raman spectroscopy. Stokes and anti-Stokes spectra are measured as a function of time following ...
-
Article
Time-resolved step-scan Fourier transform infrared investigation of heme-copper oxidases: Implications for O2 input and H 2O/H+ output channels
(2004)We have applied FTIR and time-resolved step-scan Fourier transform infrared (TRS2-FTIR) spectroscopy to investigate the dynamics of the heme-CuB binuclear center and the protein dynamics of mammalian aa3, Pseudomonas ...
-
Article
Topochemical transformations of substituted cyclopentanone transition metal adducts
(2002)The application of chelation to transition metal ions as a means of controlling the packing motifs of substituted catechols and of substituted malonates has been studied. Substituted malonates have been shown to be capable ...
-
Article
Total synthesis of psammaplysenes A and B, naturally occurring inhibitors of FOXO1a nuclear export
(2005)(Chemical Equation Presented) Two inhibitors of FOXO1a-mediated nuclear export, psammaplysenes A and B, have been synthesized by a flexible and efficient route. A common starting material, 4-iodophenol, was used to prepare ...
-
Article
Trace detection of endogenous human volatile organic compounds for search, rescue and emergency applications
(2015)Since Pauling's paper in the 1970s, interest has increased in volatile organic compounds (VOCs) released from different bio-fluids, such as blood and urine. A number of VOCs reflect internal biochemical pathways occurring ...
-
Article
Tranilast-induced stress alleviation in solid tumors improves the efficacy of chemo- and nanotherapeutics in a size-independent manner
(2017)Accumulation of mechanical stresses during cancer progression can induce blood and lymphatic vessel compression, creating hypo-perfusion, hypoxia and interstitial hypertension which decrease the efficacy of chemo- and ...
-
Book
Transatlantic relations and modern diplomacy : an interdisciplinary examination
(Routledge/Taylor & Francis Group, 2014)
-
Book
Transatlantic Relations and Modern Diplomacy : An interdisciplinary examination
(Taylor and Francis, 2013)
-
Article
Transformation of 2-(4-chloro-5H-1,2,3-dithiazol-5-ylideneamino)-6-ethoxy-4-phenylpyridine-3,5-dicarbonitrile into 4-aminopyrido[2,3-d]pyrimidines and 2-(pyrid-2-yl)guanidines
(2015)The reactions of 2-(4-chloro-5H-1,2,3-dithiazol-5-ylideneamino)-6-ethoxy-4-phenylpyridine-3,5-dicarbonitrile (14) with a range of primary and secondary amines are investigated. Treatment with n-BuNH2 and BnNH2 gave ...
-
Article
Transient diffusion, desorption, and reaction studies of cyclopropane and propylene with NaX and Eu/NaX zeolites
(1992)The exchange of Eu3+ for Na+ cations into the sodalite cages of X zeolite (Eu25Na11X) leads selectively to the isomerization reaction of cyclopropane to propylene. The latter reaction is catalyzed by Brønsted acid sites ...
-
Article
Transient diffusion, sorption, and desorption of cyclopropane in NaX zeolite
(1991)Transient diffusion, sorption, and desorption experiments of cyclopropane in Nax zeolite at 1 bar in a flow microreactor reveal that the nature of the diluent gas used in the sorbate mixture affects the kinetics of ...
-
Article
Transient isotopic kinetic study of the NO/H2/O2 (lean de-NOx) reaction on Pt/SiO2 and Pt/La-Ce-Mn-O catalysts
(2004)Steady-state isotopic transient kinetic analysis (SSITKA) coupled with temperature-programmed surface reaction (TPSR) methods and using in situ mass spectroscopy and DRIFTS have been applied for the first time to study ...
-
Article
A Transient Kinetic Study of the Co/H2 Reaction on Rh/Al2O3 Using FTIR and Mass Spectroscopy
(1994)The evolution of surface species (their chemical composition and surface coverage) formed during the CO/H2 reaction at 220°C on 1 wt% Rh/Al2O3 catalyst was studied by transient isotopic and various hydrogen titration ...
-
Article
Transient kinetic study of the oxidation and hydrogenation of carbon species formed during CH4/He, CO2/He, and CH4/CO2 reactions over Rh/Al2O3 catalyst
(1996)The dissociation of CH4 and CO2 on 0.5 wt% Rh/Al2O3 catalyst has been investigated at 650°C using transient techniques with on-line mass spectrometry. The dissociation of CH4 results in the formation of large amounts of ...
-
Article
Transient kinetic study of the reaction of C2H4 and C2H6 with the lattice and adsorbed oxygen species of Li+-doped TiO2 catalysts
(1994)A transient kinetic study of the reactions of C2H4 and C2H6 with lattice oxygen, O2- (in the absence of gaseous oxygen), and "adsorbed" oxygen (in the presence of gaseous oxygen) species over undoped and Li+-doped TiO2 OCM ...