**3. Conclusion**

In this short review, the different protocols available for the synthesis of nanostructured layered double hydroxides and metal phosphonates formulated as UCIM-n have been discussed with their applications in the removal of scale forming ions from aqueous solutions. Reports of the work done in our research laboratory on green chemistry involving the use of plant extracts and ionic liquids as solvent and stabilizing agents in the syntheses of metal nanoparticles along with their antimicrobial activities have been presented.
