This review will focus on the synthesis and characterization of some polymers and polymeric complexes containing rhodanine as a moiety then, given light on its characterization. The force constant F_M–O (10⁻⁸ N/Ǻ) and the bond length R_M–O (Ǻ) of the M–O bond were calculated from the IR data and related to the electronic properties of the substituents. ESR spectral data provided information about their structure on the basis of Hamiltonian parameters and degree of covalency. The polyrhodanine was applied to remove heavy metal ions from aqueous solution because polyrhodanine could be coordinated with specific metal ions. Adsorption isotherms of heavy metals on the polyrhodanine were analyzed with Langmuir and Freundlich isotherm models. The kinetic data of adsorption of heavy metal ions on the synthesized polyrhodanine adsorbents were described