This invention is directed to perylene-diimide aromatic dianion compounds, process of preparation and uses thereof. The perylene-diimide aromatic dianion compounds of this invention are stable in aqueous solution and can be used for photofunctional and electron transfer systems in aqueous phase. This invention is also directed to supramolecular polymers derived from perylene-diimide compounds and mixtures thereof, and to uses thereof.

Described herein are facile, one-step initiated plasma enhanced chemical vapor deposition (iPECVD) methods of synthesizing hyper-thin (e.g., sub-100 nm) and flexible metal organic covalent network (MOCN) layers. As an example, the MOCN may be made from zinc tetraphenylporphyrin (ZnTPP) building units. When deposited on a membrane support, the MOCN layers demonstrate gas separation exceeding the upper bounds for multiple gas pairs while reducing the flux as compared to the support alone.

This invention is directed to separation, optimization and purification of nano-materials using self-assembled perylene diimide membranes, wherein said perylene diimide membrane is recyclable.