Syntheses and solid state structures of hybrid d10 metal–organic frameworks based on methylenediisophthalic acid (H4MDIP)

Abstract

Four novel hybrid d¹⁰ metal complexes [Zn(H₂MDIP)(4,4′-bpy)_0.5]_n1 (4,4′-bpy = 4,4′-bipyridine, H₄MDIP = methylenediisophthalic acid), [Zn₂(MDIP)(bix)·H₂O]_n2 [bix = 1,4-bis(imidazol-1-ylmethyl)-benzene], {[Cd(H₂MDIP)(H₂O)]₂·H₂O}_n3, {[Cd₂(MDIP)(H₂O)₂(en)₂]·2H₂O}_n4 (en = ethylenediamine) based on tetracarboxylate acid were synthesized and their structures were determined by X-ray single-crystal diffraction. Complexes 1–2 are 2D grid and undulated structures with four-coordinated Zn²⁺ ions, respectively; 3–4 are 2D grid and double-sheet structures with six-coordinated Cd²⁺ ions, respectively. MDIP in complexes 1 and 3 act as V-shaped and Y-shaped ligands, respectively, yet in 2 and 4 MDIP act as similar X-shaped ligands. Diverse topologies, thermal and luminescent properties of complexes 1–4 have also been investigated.