A Cooperative Pillar–Template Strategy as a Generalized Synthetic Method for Flexible Homochiral Porous Frameworks. (1st March 2018)

• Record Type: Journal Article
• Authors: Jin, Jing; Zhao, Xiang; Feng, Pingyun; Bu, Xianhui
• Is Part Of: Angewandte Chemie. Volume 130:Number 14(2018)
• Page Start: 3799
• Page End: 3803
• Publication Date: 2018-03-01
• Subjects: Chiralität -- Kristall-Engineering -- Homochirale Gerüste -- Metall-organische Gerüste -- Poröse Materialien; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201801116
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: A new strategy for creating homochiral metal–organic frameworks through a fusion of pillaring and templating concepts is demonstrated. This strategy makes use of the synergy among various chemical interactions during self‐assembly processes, and leads to the synthesis of a series of homochiral frameworks. In the presence of only pillar‐to‐pillar π–π interactions, inter‐pillar forces compete against metal–pillar interactions, resulting in mismatch between pillar‐to‐pillar and metal‐to‐metal separations and consequently 2D materials without pillaring. To create 3D materials, a method was developed to use various aromatic molecules, polycyclic aromatic hydrocarbons in particular, as templates to modulate the inter‐pillar interaction and separation, leading to the formation of 3D homochiral frameworks. The use of aromatic molecules, especially hydrocarbons, as structure‐directing agents, represents a new approach in the development of crystalline porous materials. Aromatic templates can be post‐synthetically extracted to yield flexible porous homochiral materials with gate‐opening gas sorption behaviors for both N2 and CO2 at partial pressures tunable by temperature.