Zinc(II) coordination polymers with mixed ligands: Synthesis, structures and evaluation on metal sensing

Two Water-Stable Zn(II) Coordination Polymers as Luminescent Sensors for Detection of Uric Acid in Serum, MnO4–, and Cr(VI) Oxo-Anions in Tap Water

“…Hence, the excess of ligands may be beneficial for the growth of the crystals. As per our previous successful experience for the synthesis of NDS-based CPs, 25 because the disodium salt of the 1,5-naphthalenedisulfonate acid was used in the synthesis, the pH value of the reaction solution is alkaline, the crystals could not be obtained, and only some powder mixtures could be found in the container; but when the pH values were adjusted to near neutral, the crystals could be obtained successfully, so two drops of acetic acid were added to adjust the pH values to near neutral in this synthesis. In addition, parallel experiments using zinc nitrate or zinc sulfate were performed at the same time as using zinc acetate salt in our synthesis, but the crystals could only be obtained successfully when using the zinc acetate salt.…”

“…Recently, the construction of CPs via rigid mixed with flexible ligands has been well documented. − 1,5-Naphthalenedisulfonate (1,5-NDS) is a rigid O-donor ligand with a naphthalene ring as the conjugate system, which has the benefits of construction of CPs with excellent luminescence properties. , Also, its two sulfonate groups can coordinate to metal centers with various modes (Scheme S1), which can help to generate CPs with diverse structures. In addition, 1,4-bis­(2-methyl-1 H -imidazole-1-yl)­butane (Mbimb) and 1,4-bis­(1 H -benzimidazol-1-yl)­butane (bbimb) are two flexible N-donor ligands containing –(CH 2 ) 4 – with good conformational freedom, , thus forming unpredictable intriguing topologies and properties.…”

Trans-Catena-Poly[[(Bis-(μ-N,N’-Bis[(Pyridin-3-yl)Methyl]Ethanediamide))-Diaqua-Cadmium(II)] Bis(Nitrate) Tetrahydrate)]

“…Oxalyl diamides (oxalamides), i.e., oxalic acid diamides, have been widely employed in synthetic organic chemistry [7,8] and coordination chemistry [9,10]. In particular, N,N'-bis(pyridin-3-ylmethyl)oxalamide (L) was isolated in two polymorphs [11], as a hydrate [12], and it was structurally characterized in about fifteen different cocrystals and about thirty coordination compounds, where the pyridine N-atoms were directly involved in the coordination of transition metal ions as varied as Cu II [13], Zn II [14], Ni II [15], Ag I [16], Au I [17], Co II [18,19], and Pd II [20]. In addition, four Cd II complexes bearing the L oxalamide ligand in combination with carboxylate and dithiophosphato ancillary ligands have been reported to date [18,21].…”