Polymeric Silver(I) Benzisothiazolinone Complex: Synthesis, Characterization and $\text{H}_2$ Gas Storage Capacity

Abstract

Treatment of silver(I) nitrate with sodium benzisothiazolinone (Nabit) affords $[\text{Ag(bit)}]_n$ complex. The produced silver coordination complex was characterized by infrared spectroscopy, elemental analysis, nuclear magnetic resonance ($\text{}^1\text{H-NMR}$ and $\text{}^{13}\text{C-}\lbrace\text{}^1\text{H}\rbrace\text{-NMR}$). These measurements showed that the bit anion behaves as a bidentate bridge linking two silver (I) ions through the oxygen and nitrogen atoms. The prepared $[\text{Ag(bit)}]_n$ has a high stability, didn't melt up to 320 °C and non-soluble in water in addition to a number of organic solvents except hot DMSO solvent. Therefore a polymeric structure was proposed, the polymeric structure has a high porosity showing thereby that an overall $\text{H}_2$ uptake of 5.5 mmol/g at 77 K and 10 bar.