Synergistic Binding Sites in a Hybrid Ultramicroporous Material for One-step Ethylene Purification from Ternary C Hydrocarbon Mixtures

Overview

Journal Sci Adv

Specialties Biology
Science

Date 2022 Jun 8

PMID 35675397

Authors

Peixin Zhang

Yao Zhong

Yan Zhang

Zhenliang Zhu

Yuan Liu

Yun Su

Jingwen Chen

Shixia Chen

Zheling Zeng

Huabin Xing

Shuguang Deng

Jun Wang

Affiliations

Soon will be listed here.

Abstract

One-step separation of CH from ternary CH/CH/CH hydrocarbon mixtures is of great significance in the industry but is challenging due to the similar sizes and physical properties of CH, CH, and CH. Here, we report an anion-pillared hybrid ultramicroporous material, CuTiF-TPPY, that has the ability of selective recognition of CH over CH and CH. The 4,6-connected framework of CuTiF-TPPY exhibits semi-cage-like one-dimensional channels sustained by porphyrin rings and TiF pillars, which demonstrates the noticeably enhanced adsorption of CH and CH over CH. Dynamic breakthrough experiments confirm the direct and facile high-purity CH (>99.9%) production from a ternary gas mixture of CH/CH/CH (1/9/90, v/v/v) under ambient conditions. Computational studies and in situ infrared reveal that the porphyrin moieties with large π-surfaces form multiple van der Waals interactions with CH; meanwhile, the polar TiF pillars form C-H•••F hydrogen bonding with CH. In contrast, the recognition sites for CH in the framework are less marked.

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