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Showing 1 to 18 of 18 for “"Charge-Transfer Complexes"”.
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Charge-Transfer Complexes for Amine Synthesis
… to generate α-amino radicals, via a photoinduced charge-transfer complex, is reported. A multicomponent radical fragmentation-cyclization reaction was developed, combining secondary amines, cyclopropyl carboxaldehydes and alkenes, to generate cyclopentyl methylamines. To initiate the fragmentation …
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Structure-Function Relationships in Organic Charge-Transfer Complexes
Organic charge-transfer complexes are ordered combinations of charge-donating (D) and charge-accepting (A) compounds. The proximity of the D and A units results in a partial degree of ionicity and a band structure that is a hybrid of the parent compounds, allowing the complex to exhibit interesting …
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Investigation on the Morphology of Charge-Transfer Complexes in Low Density Polyethylene
… in particle reinforced polymer composites. Charge-transfer complexes (CTCs) can assemble <em>in situ</em> into various needle and dendritic shapes via simple fabrication processes and at low loading levels. In this study, the effect of tetrathiafulvalene (TTF) and …
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High Pressure Optical Studies of the Thallous Halides and of Charge-Transfer Complexes (Insulator, Metal, Sulfur, Infrared)
… and to study the intermolecular interactions in charge-transfer complexes. The approach to the band overlap insulator-to-metal transition was studied in three thallous halides and sulfur by optical absorption measurements of the band gap as a function of pressure. The band gap of sulfur …
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Part I: Circular dichroism studies of optically active charge transfer complexes. Part II: vapor phase and solvent dependence circular dichroism studies of some terpenes, α-phenylethanol, and α-phenylethylamine
<p>The circular dichroism charge transfer (CT) spectra of the achiral acceptors TCNE, DDQ, and Vitamin K<sub>3</sub> with chiral donors such as terpenes, steroids and β-phenylethylamine derivatives in methylene chloride at 27° were investigated. A new transition not attributable to either component …
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Synthetic Approaches to Organaylselenium and Tellurium Semi-Conductors
… some electron acceptors to form donor-acceptor complexes. 7,7,8,8-Tetracyano-p-quinodimethane (TCNQ), Chloranil (TCQ) and pdinitrobenzene (DNB) were chosen as acceptors. Solid state conductivity measurements have been employed for the charge-transfer complexes...
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Theory and Simulations of Charge Transfer in Engineered Chemical Systems
<p>Electron transfer is an essential process for life to exist and is the working principle of electronics. Fundamental knowledge of electron transfer is crucial for understanding biological processes and developing future devices. Here, we present our theoretical and experimental efforts to …
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The investigation of novel charge transfer systems.
… with a view to preparing a new type of charge transfer polymer system having a structure based on that of side chain liquid crystal polymers, in that the hoped for polymer was composed of charge transfer acceptors connected to a polymer backbone via a flexible alkyl spacer linkage. As …
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Azoto heterociklinių darinių fluorescencinių savybių valdymas poliniais pakaitais /
… with polar substituents form the intramolecular charge transfer complexes and their fluorescence properties are sensitive to the polarity changes of the surrounding media and the substituents, as well as variation of their morphology and intramolecular twisting. This dissertation is also aimed at …
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Tuning of the fluorescence properties of nitrogen heterocyclic compounds by polar substituents /
… with polar substituents form the intramolecular charge transfer complexes and their fluorescence properties are sensitive to the polarity changes of the surrounding media and the substituents, as well as variation of their morphology and intramolecular twisting. This dissertation is also aimed at …
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Synthesis and Coordination of the Arylazo Ligands 1-(2-pyridylazo)-2-phenanthrol and 1-(8-quinolynazo)-2-phenanthrol
… has afforded twelve new complexes that feature many different structural, mag- netic, and electronic properties. Chapter one deals with the aspects of materials chemistry which are pertinent to the material presented in this thesis. This includes inorganic chemistry, mag- …
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Crystallographic studies of some tetracyaquidimethane complexes.
The solid state structures of charge-transfer complexes of 7,7,8,8-tetracyanoquinodimethane, TCNQ, have been reviewed and classified into three main structural types viz homosoric (pseudosoric), heterosoric, and nonsoric. In an attempt to more fully understand the factors influencing the type of …
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Interactions of halogens with amines
… via the nitrogen lone pair to form molecular complexes (CHARGE-TRANSFER COMPLEXES). Several of these have been isolated and some of their properties studied in detail. It was thus determined that these complexes can undergo further chemical change during which the hydrogen iodide which is …
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Dipole moments and Kerr effect of poly(n-vinylcarbazole) and its complexes with trinitrofluorenone
… effect studies have also been carried out on complexes formed between 2,4,7-trinitro-9-fluorenone (TNF) and different stereoregular forms of poly(N-vinylcarbazole) in solution in 1,4-dioxane. The differences in the molar Kerr constants between pure (uncomplexed) and complexed …
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The chemistry of some organotellurium compounds
… addition which involves the preformation of a charge transfer complex of alkyl halide and diphenyltelluride.The first step is the formation of a charge transfer complex, and the initial product of the oxidative addition is a "covalent" form of the tellurium(IV)compound. When the radical R is …
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Enhancing the cooperative binding properties of1,1'-bis(1,2,3,4-tetrahydroisoquinolines)
… was used to analyse the structures of these complexes in the solid state. Preliminary physicochemical investigations were conducted with a view to determining the conformation of the molecules about the bisisoquinoline C1-C1' bond. The interaction of intermolecular N-aryl π-excessive …
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Spectroscopic exploration of conformal heterogeneity in an amorphous polyphenylene-vinylene derivative
… and thus molecular planarity. Ground state charge transfer complexes of MDMO-PPV and several electron acceptors were studied using linear absorption and Resonant Raman spectroscopy to better understand the nuclear rearrangements that the polymer undergoes upon loss of an electron. Any bonds …
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ΔΙΕΡΕΥΝΗΣΗ ΤΗΣ ΔΙΠΛΩΣΗΣ ΤΟΥ ΠΕΠΤΙΔΙΚΟΥ ΣΚΕΛΕΤΟΥ. ΣΥΝΘΕΣΗ ΚΑΙ ΑΝΑΛΥΣΗ ΤΗΣ ΔΙΑΜΟΡΦΩΣΗΣ ΑΝΑΛΟΓΩΝ ΤΟΥ ΚΕΝΤΡΙΚΟΥ ΤΜΗΜΑΤΟΣ ΤΗΣ ΑΓΓΕΙΟΤΕΝΣΙΝΗΣ ΙΙ. ΦΑΣΜΑΤΟΣΚΟΠΙΕΣ UV-VIS ΚΑΙ NMR
… HAVE BEENSUCCESSFULLY VISUALIZED BY APPLYING CHARGE TRANSFER MARKERS IN THE LRF MOLECULE (P-GLU-HIS-TRP-SER-TYR-GLY- LEU-ARG-PRO-GLY-NH2) AND ANALOGUES OF ITS CENTRALSEQUENCE, ACCORDING TO THE PROBABILITY OF B-TURN FORMATION. ON THE OTHER HAND,SIDE CHAIN-SIDE CHAIN INTERACITONS BETWEEN TYR4 …