Decoupling anion-ordering and spin-Peierls transitions in a strongly one-dimensional organic conductor with a chessboard structure, (o-Me₂TTF)₂NO₃.

ABSTRACT: A mixed-valence conducting cation radical salt of the unsymmetrically substituted o-Me₂TTF donor molecule (TTF is tetrathiafulvalene) was obtained upon electrocrystallization in the presence of the non-centrosymmetric NO₃^- anion. It crystallizes at room temperature in the monoclinic P2₁/c space group, with the anion disordered on an inversion centre. The donor molecules are stacked along the a axis. A 90° rotation of the longest molecular axis of o-Me₂TTF generates a chessboard-like structure, preventing lateral S⋯S contacts between stacks and providing a strongly one-dimensional electronic system, as confirmed by overlap interaction energies and band structure calculations. A strong dimerization with

SUBMITTER: Jeannin O 

PROVIDER: S-EPMC5929382 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature