A Series of Coordination Polymers Based on 4,8-Disulfo-2,6-Naphthalenedicarboxylic Acid

Five new metal-organic frameworks based on 4,8-disulfo-2,6-naphthalenedicarboxylic acid (H4dsndc) are obtained: [Cd2(dsndc)(dmf)6] (1), [Mn2(dsndc)(dmf)6] (2), [Zn2(dsndc)(dmf)6] (3), [Co2(dsndc)(dmf)6] (4), and [Cd2(dsndc)(dma)6] (5) (DMF = N,N-dimethylformamide, DMA = N,N-dimethylacetamide). The four of them (1–4) are isostructural layered coordination polymers. The structures of all compounds are determined by the single crystal X-ray diffraction analysis. Compounds 1–3 and 5 are obtained as chemically and phase-pure and are characterized by the standard complex of physicochemical techniques (powder XRD, IR, TGA, and CHN). Photoluminescence excitation and emission spectra are recorded for compound 3, and a quantum yield of 18% is obtained.