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Showing 1 to 20 of 22 for “"TCNQ"”.
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A study of zwitterionic adducts of TCNQ.
… The properties of picolinium and quinolinium TCNQ salts are introduced and the extension of this to the molecules studied in this work developed. Two current areas of interest - second harmonic generation and molecular rectification - are then reviewed and the potential applications of the …
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Electrical and magnetic characterisation of a series of TCNQ salts.
… properties of a series of 12 isostructural TCNQ salts of bis-pyridinium cations are reported and these properties are related to the structural characteristics. The role of the cation lattice in stabilising a regular TCNQ stack in these salts is discussed. For comparison with this series, …
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The synthesis and characterisation of Langmuir-Blodgett film forming TCNQ adducts.
Substitution reactions of TCNQ (7,7,8,8-tetracyanoquinodimethane) with suitable electron donor moieties extended the range of gamma-bridged adducts R(4)Q3CNQ and R(4)P3CNQ of which the short chain Z-beta-(l-butyl-4'-quinolinium)-alpha-cyano-4-styryldicyanomethanide (C[4]H[9](4)Q3CNQ) is a typical …
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Synthesis and molecular properties of zwitterionic adducts of TCNQ and other related compounds
… with the synthesis and characterisation of novel TCNQ (7,7,8,8-tetracyanoquinodimethane), TMTCNQ (2,3,5,6-tetramethyl-7,7,8,8-tetracyanoquinodimethane) and TCNQF4 (2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane) based zwitterionic D-1t-A materials (where D and A are electron donors and …
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Crystallographic studies of some tetracyaquidimethane complexes.
… 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 structure adopted in the solid state and to …
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Structure-Function Relationships in Organic Charge-Transfer Complexes
… 7,7,8,8-tetracyanoquinodimethane (perylene-TCNQ), dibenzotetrathiafulvalene-TCNQ (DBTTF-TCNQ), and stilbene-F4TCNQ.
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Nonohmic Electrical Conductivity and Giant Dielectric Constant in Methyltriphenyl Arsonium Ditetracyanoquino Dimethane
… well-formed single crystals of m(phi)(,3)As(TCNQ)(,2) crystals have been grown. The largest of these crystals are probably the largest TCNQ salt crystals ever grown; they may also be the most perfect.
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Optical absorption and electrical conductivity of electron acceptor doped poly-3-octylthiophene films
… (DDQ) and 7,7,8,8-tetracyanoquinodimethane (TCNQ); and with the inorganic electron acceptor, ferric chloride (FeCl{dollar}\sb3{dollar}). Charge transfer was observed in P3OT solutions doped with FeCl{dollar}\sb3{dollar} and DDQ. TCNQ-doped solutions showed no optical evidence of charge …
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Electrical and magnetic properties of organic semiconductors: Electrical conductivity and electron spin resonance studies of semiconducting, organic, charge transfer salts.
… transfer salts of Tetracyanoquinodimethane (TCNQ) were synthesised and their electrical and magnetic properties were investigated. These salts show unusual electrical and magnetic behaviour in contrast to conventional organic compounds. These salts have crystal structures which in general …
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Studies of the static magnetic susceptibility and microwave properties of tetrathiofulvalinium-tetracyanoquinodimethane
… etrathiofulvalinium-Tetracyanoquinodimethane (TTF-TCNQ) was measured using the Faraday method. Particular attention was paid to the region below 60 K in order to investigate the metal-to-insulator transformation this material undergoes. Anomalies in the susceptibility were apparent near 55 K and …
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Metal-organic nanowires
… (TTF) and tetracyanoquinodimethane (TCNQ) were focused in this thesis. Concerning the synthesis of metal-organic nanowires, microfluidics offers various benefits, e.g. laminar flow, reduced sample/reagent consumption and control of self-assembly of nanostructures. Therefore, …
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Electrochemical Studies of Reactions in Small Volumes Less Than 1 Femto Litres.
… contains 7,7,8,8-Teteracyanoquinodimethane (TCNQ), and be oxidized to form Ru(NH<sub>3</sub>)<sub>6</sub><sup>3+</sup> by giving electrons to TCNQ at the interface. Our results showed a positive shift in the E<sub>1/2</sub> comparing the reaction undertaken in the recessed cavity and the bulk …
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Density-functional theory and beyond for organic electronic materials
… Tetrathiafulvalen-(TTF)-Tetracyanoquinodimethan-(TCNQ)-Komplexes, dass beide Aspekte bei schwach wechselwirkenden Molekülen berücksichtigt werden müssen, weil ansonsten Artefakte in der Beschreibung des Elektronentransfers und der Bindungskurve auftreten. Um diese Beschränkungen zu überwinden, …
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Synthetic Approaches to Organaylselenium and Tellurium Semi-Conductors
… 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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Development and Construction of a new Photoelectron Imaging Spectrometer for Studying the Spectroscopy and Ultrafast Dynamics of Molecular Anions
… of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion. The photoelectron spectrum of TCNQ– is measured at 3.1 eV, which is used to gain insight into the electronic structure and geometries of both the anion and neutral states. Time-resolved photoelectron imaging experiments explore …
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Investigation on the Morphology of Charge-Transfer Complexes in Low Density Polyethylene
… (TTF) and 7,7,8,8-tetracyanoquinodimethane (TCNQ) CTC crystallites of various shapes and sizes on composite mechanical properties was investigated in an LDPE (low density polyethylene) polymer matrix. The CTC morphology was selectively controlled via the concentration, compression-molding …
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Scanning electron microscope technique for measuring electrical conductivity: Application to tetrathiafulvalene-tetracyanoquinodimethane
… tetrathiafulvalenetetracyanoquinodimethane (TTF-TCNQ) is reported. A movable current sour(:e provided by the electron beam of a scanning electron microscope is used to map out the potential distribution on crystal faces containing the a-b crystallographic axes. Silver paint contacts are used to …
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Electrical properties of some low-dimensional compounds
… compounds studied in this work are ethylated TTF-TCNQ, another pseudo-one-dimensional compound, . and IT-Til+x Se2, a two-dimensional compound. Electrical conductivity and heat capacity measurements on TTF-DETCNQ reveal a metal-insulator transition at III ± 1 K, a temperature higher than the …
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DETERMINATION OF CO AND MN IN MARINE WATERS USING FLOW INJECTION WITH CHEMILUMINESCENCE DETECTION
… oxidation of 7,7,8,8- tetracyanoquinodimethane (TCNQ) by dissolved O2. The weak chemiluminescence of TCNQ is effectively sensitised by Eosin Y in DDAB. In Chapter Five the application of the FI-CL method to the shipboard determination of Co in the western North Sea is presented together with …
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SPECTROSCOPIC, IMAGING, AND DOPING STUDIES OF PUSH-PULL CONJUGATED POLYMER SOLAR CELLS
… tetracyanoquinodimethane (F4-TCNQ) allows devices based on these blends to show improved power conversion efficiencies (PCEs), as well as improvements in other solar cell operating parameters and figures of merit. Blends of PCPDTBT with the electron acceptors …
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