Crystal structure of 5,7,12,14-tetrahydro-5,14:7,12-bis([1,2]benzeno)pentacene-6,13-dione

Abstract

5,7,12,14-Tetra­hydro-5,14:7,12-bis­([1,2]benzeno)­penta­cene-6,13-dione, used as a precursor in the synthesis of polymers of intrinsic microporosity (PIM) membranes, recrystallizes from DMF.

A New Pentiptycene‐Based Dianhydride and Its High‐Free‐Volume Polymer for Carbon Dioxide Removal

“…Pentiptycene is a well‐known member of the iptycene family and consists of five benzene rings hinged with a regular pattern to form an H‐shaped core block . Figure shows the structures of the pentiptycene building blocks that are based on single‐crystal structures of pentiptycene quinone (PPQn) and pentiptycene‐6,13‐diol (PPDo) . The dimensions of the pentiptycene moiety reported in Refs.…”

“…[37,39,40] Figure 1s hows the structures of the pentiptycene building blocks that are based on single-crystal structures of pentiptycene quinone (PPQn) and pentiptycene-6,13-diol (PPDo). [41,42] The dimensions of the pentiptycene moietyr eportedi nR efs. [41,42] are closet ot he-oretical values calculated by molecular simulations.…”

“…[41,42] The dimensions of the pentiptycene moietyr eportedi nR efs. [41,42] are closet ot he-oretical values calculated by molecular simulations. [37] The bulky structure (which impedes chain packing), the large molecular space between arene rings, and open clefts of pentiptycene endow pentiptycene-based membranes with high internal free volumes (IFVs), which are three times highert han those of membranes with the Trip moiety.T he IFVs have sizes equivalent to the kinetic diameters of light gases.…”