Emma Lupano
Radical Cation Salts of Tetramethyltetrathiafulvalene (TM-TTF) and Tetramethyltetraselenafulvalene (TM-TSF) with Chlorocyananilate-Based Anions
Ashoka Sahadevan S.Primo
;Monni N.;Mercuri M. L.
;Avarvari N.
2020-01-01
Abstract
Electrocrystallization of tetramethyltetrathiafulvalene (TM-TTF) and tetramethyltetraselenafulvalene (TM-TSF) with chlorocyananilate monoanion or/and tris(chlorocyananilato)ferrate(III) in THF/DCM solvent mixtures yielded a salt formulated as [TM-TTF]4[K(HClCNAn)4] (1) with the former and π-d hybrid systems, formulated as [TM-TTF]5[Fe(ClCNAn)3]·2CH2Cl2 (2) and [TM-TSF]3[Fe(ClCNAn)3]·0.5CH2Cl·2.5H2O (3), respectively, with the latter. Compound 1 shows segregation of TM-TTF donor molecules and K(HClCNAn)4 anionic clusters in the bc plane. The donor molecules are present as mixed-valence dimers and show a β′ packing arrangement. Compounds 2 and 3 consist of hybrid organic/inorganic structures with no segregation of [Fe(ClCNAn)3]3- anionic complexes and organic TM-TTF/TM-TSF donors. In the structure of compound 3, TM-TSF dimers are trapped between anilate units of metal complexes of opposite chirality. Furthermore, tetrameric donor motifs and solvent molecules of crystallization complete the structure. Single-crystal conductivity measurements on compounds 1 and 2 show semiconducting behavior with room-temperature conductivity values of 5 × 10-5 and 2 × 10-4 10 S cm-1 and activation energies of 1960 and 1900 K, respectively. Under high pressure, compound 2 remains a semiconductor, yet its room-temperature conductivity value strongly increases up to 0.2 S cm-1 at 9.8 GPa.File | Dimensione | Formato | |
---|---|---|---|
2020-CGD_mercuri_avarvari_.pdf Solo gestori archivio
Tipologia: versione editoriale
Dimensione 7.02 MB
Formato Adobe PDF
|
7.02 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.