Three 3D Metal–Quinolone Complexes Based on Trimetallic or Rod‐Shaped Secondary Building Units

The self‐assembly of quinolones with metal salts in the presence of aromatic polycarboxylato ligands or chloride anions produced three novel 3D metal–quinolone coordination polymers, namely [Cu 3 (ppa) 2 (oba) 2 (H 2 O) 4 ] · H 2 O ( 1 ), [Cd 3 (ppa) 2 (bpdc) 2 (H 2 O) 2 ] · 5H 2 O ( 2 ), and [Cd 2 (sara) 2 (μ 2 ‐Cl) 2 ] · 5H 2 O ( 3 ) [ppaH = pipemidic acid, saraH = sarafloxacin, oba = 4,4′‐oxybis(benzoate), bpdc = 4,4′‐biphenyldicarboxylate]. Their structures were determined by single‐crystal X‐ray diffraction analyses, and they were further characterized by elemental analyses, IR spectra, X‐ray powder diffraction, and TG analyses. Compound 1 represents a novel 3D (3,4)‐connected network with a (6 · 8 2 ) 2 (6 · 8 2 ) 2 (6 2 · 8 2 · 10 2 ) topology constructed from Cu atoms and ppa ligands. Compound 2 represents the first example of a 3D metal–quinolone complex with a (3,4,6)‐connected (5 2 · 6) 2 (5 2 · 6 4 )(5 4 · 6 6 · 7 2 · 8 · 9 2 ) topology. Compound 3 is an unprecedented 3D metal–quinolone complex constructed from Cl – ions connecting the {Cd(sara)} n n + layers. Furthermore, the luminescent properties of compounds 2 and 3 are discussed.