<p dir="ltr">This dataset belong to my PhD thesis which aims at enhancing the membrane permeance through the manipulation of amine monomers in terms of their structure and their distribution. Both polyamide-based TFC membranes (the current material for desalination membranes) and COF membranes (emerging novel materials) were investigated. To provide a comprehensive description of membranes, their physicochemical properties, morphological features, as well as their filtration performance, were studied and discussed. Chapter 3 investigated the structure of aromatic diamine monomers on the polyamide membrane properties. Chapter 4 explored the distribution of MPD monomers on the morphologies and separation performance of the resulting membranes. Chapter 5 adopted end-capping amine monomers to modify the structure and improve the permeance of COF membranes.</p>