Fine Pore‐Structure Engineering by Ligand Conformational Control of Naphthalene Diimide‐Based Semiconducting Porous Coordination Polymers for Efficient Chemiresistive Gas Sensing

作者：Ziqian Xue, Jia‐Jia Zheng, Yusuke Nishiyama, Ming‐Shui Yao, Yoshitaka Aoyama, Zeyu Fan, Ping Wang, T. Kajiwara, Yoshiki Kubota, Satoshi Horike, Ken‐ichi Otake, Susumu Kitagawa · 发表于：Angewandte Chemie International Edition · 年份：2022 · DOI：10.1002/anie.202215234 · 被引用次数：36 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Covalent Organic Framework Applications、Gas Sensing Nanomaterials and Sensors

Exploring new porous coordination polymers (PCPs) that have tunable structure and conductivity is attractive but remains challenging. Herein, fine pore structure engineering by ligand conformation control of naphthalene diimide (NDI)-based semiconducting PCPs with π stacking-dependent conductivity tunability is achieved. The π stacking distances and ligand conformation in these isoreticular PCPs were modulated by employing metal centers with different coordination geometries. As a result, three conjugated PCPs (Co-pyNDI, Ni-pyNDI, and Zn-pyNDI) with varying pore structure and conductivity were obtained. Their crystal structures were determined by three-dimensional electron diffraction. The through-space charge transfer and tunable pore structure in these PCPs result in modulated selectivity and sensitivity in gas sensing. Zn-pyNDI can serve as a room-temperature operable chemiresistive sensor selective to acetone.