Kinetic Studies of N2 Adsorption on Polymers of Intrinsic Microporosity (PIM-1) to Study the Effect of the C-N Functionalities


Polymers of Intrinsic Microporosity (PIM-1) (Figure 1) are a unique class of organic polymers which are porous because of the presence of a spiro centre that prevents rotation of polymer chain which causes them to possess internal free volume (IFV)1. PIM-1 are unique compared to other porous carbon nanostructures because of the presence of regular C-N surface functionalities. The permeability and selectivity of PIM-1 for gas separation can be tuned via chemical modification of the nitrile group or photochemical modification of the spirocentre2, 3, 4. Because of such structural attributes these polymers possess a high surface area and can be probed for N2 adsorption and entrapment. Here, we explore the role of the CN surface functionalities of PIM-1 in inhibiting gas diffusivity, by providing a comparative study of N2 and Ar diffusion rates. (Figure Presented).

Meeting Name

2016 American Institute of Chemical Engineers (AICHE) ANNUAL MEETING (2016, Nov. 13-Nov. 18, San Francisco, CA)


Chemical and Biochemical Engineering

Keywords and Phrases

Carbon; Chemical modification; Microporosity; Porous materials; Separation; Comparative studies; Gas diffusivity; Gas separations; High surface area; Nitrile groups; Photochemical modifications; Polymers of intrinsic microporosities; Surface functionalities; Organic polymers

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


File Type





© 2016 American Institute of Chemical Engineers (AIChE), All rights reserved.

Publication Date

01 Nov 2016