A Dynamic Chemical Clip in Supramolecular Framework for Sorting Alkylaromatic Isomers using Thermodynamic and Kinetic Preferences. Issue 36 (26th July 2021)

• Record Type: Journal Article
• Authors: Laha, Subhajit; Haldar, Ritesh; Dwarkanath, Nimish; Bonakala, Satyanarayana; Sharma, Abhishek; Hazra, Arpan; Balasubramanian, Sundaram; Maji, Tapas Kumar
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 36(2021)
• Page Start: 19921
• Page End: 19927
• Publication Date: 2021-07-26
• Subjects: BTEX selectivity -- coordination polymers -- dynamic space -- liquid-phase separation -- supramolecular frameworks; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202106784
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Adsorptive chemical separation is at the forefront of future technologies, for use in chemical and petrochemical industries. In this process, a porous adsorbent selectively allows a single component from a mixture of three or more chemical components to be adsorbed or permeate. To separate the unsorted chemicals, a different adsorbent is needed. A unique adsorbent which can recognize and separate each of the chemicals from a mixture of three or more components is the necessity for the next generation porous materials. In this regard, we demonstrate a "dynamic chemical clip" in a supramolecular framework capable of thermodynamic and kinetics‐based chemical separation. The dynamic space, featuring a strong preference for aromatic guests through π‐π and C‐H⋅⋅⋅π interactions and adaptability, can recognize the individual chemical isomers from mixtures and separate those based on thermodynamic and kinetic factors. The liquid‐phase selectivity and separation of the aromatic isomers are possible by the adaptability of the "chemical clip" and here we elucidate the prime factors in a combinatorial approach involving crystallographic evidence and detailed computational studies. Abstract : A dynamic adsorbent that acts like a chemical clip was realized, which sorts alkylaromatic isomers with high selectivity. The design of the chemical clip is based on a supramolecular coordination polymer, and the thermodynamic and kinetic preferences towards the isomers are unveiled by a combinatorial experimental and computational approach.