[WS4Cu3I2]− and [WS4Cu4]2+ secondary building units formed a metal–organic framework: Large tubes in a highly interpenetrated system

Abstract

A 3D metal–organic framework, {[WS₄Cu₄(dpbp)₄]²⁺·[WS₄Cu₃(dpbp)₂I₂]⁻·I⁻}_n·xSolvent, [dpbp = 4,4′-di(4-pyridyl)biphenyl] with an unprecedent 8-fold non-equivalent interpenetration mode is presented, which contains four anionic and four cationic frameworks formed by tetranuclear [WS₄Cu₃I₂]⁻ and pentanuclear [WS₄Cu₄]²⁺ SBUs with long dpbp ligands. Large rhombus-shaped tubes with diagonal dimensions of ∼20 × 10 Å are formed in spite of high interpenetration.