and Andrei S. Batsanov

New tetrathiafulvalene derivatives bearing thioamide substituents

The synthesis of compounds 2b-e are described. The single crystal X-ray structures of compounds 2b and 2c are reported.

Conducting langmuir-blodgett films of new amphiphilic tetrathiafulvalene derivatives

Abstract New mono-functionalised, amphiphilic tetrathiafulvalene (TTF) derivatives have been synthesised and shown to form Langmuir-Blodgettt films, some of which are semiconducting ( δ rt = 10 −5 -10 −2 Scm −1 after iodine doping. These layers have been characterised by UV-Visible and IR spectroscopy in the undoped and doped states. X-ray crystal structures of related TTF derivatives substituted with a thioester and a thioamide group are presented.

Structural and electrical studies on nickel(dmit)2 complexes

Abstract Studies on Langmuir-Blodgett films of Ni(dmit)2 anions complexed with N-octadecylpyridinium and tetrabutylammonium cations are reported. The single crystal X-ray structure of a 2:1 complex (N-octadecylpyridinium)2-Ni(dmit)2 is presented.

A novel modification of trans-p,p'-dibromoazobenzene

The X-ray crystal structure of the second polymorphic modification of the title compound, C 12 H 8 Br 2 N 2 , was studied at 150 K, revealing essentially the same molecular geometry but different crystal packing, similar to that in the chloro and methyl analogues

New materials based on highly-functionalised tetrathiafulvalene derivatives

Tetrathiafulvalene (TTF) 1 is famous as a π-electron donor molecule that forms low-dimensional organic metals and organic semiconductors upon complexation with a range of π—electron acceptor species, e.g tetracyano-p-quinodimethane (TCNQ) and inorganic and organometallic anions, e.g halogens and metal (dmit)2 [1]. Some derivatives of TTF, notably bis(ethylenedithio)-TTF (BEDT-TTF) form cation radical salts which are organic superconductors, with current Tc values as high as 12K [2]. The significance of functionalised electroactive molecules [e.g quinone, metal(bipyridyl) and ferrocene derivatives] in the wider context of supramolecular chemistry [3] and molecular electronics [4] is well recognised and TTF offers tremendous potential as a versatile building block in this respect [5]. The relevant properties of the TTF ring system are: (i) oxidation of TTF to the radical cation species occurs reversibly at a relatively low potential (ca. +0.34 V, vs. Ag/AgCI for unsubstituted TTF 1) which can be finely tuned by the attachment of substituents; (ii) TTF+ is thermodynamically a very stable species; (iii) oxidised TTF units readily form highly ordered arrays with close intermolecular interactions involving both π—π overlap and non-bonded S--S contacts.