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Triaxially Woven Hydrogen‐Bonded Chicken Wires of a Tetrakis(carboxybiphenyl)ethene
Author(s) -
Suzuki Yuto,
Tohnai Norimitsu,
Hisaki Ichiro
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202002546
Subject(s) - biphenyl , thermal stability , phenylene , porosity , materials science , hydrogen bond , hydrogen , reticular connective tissue , molecule , polymer chemistry , crystallography , polymer , chemistry , composite material , organic chemistry , medicine , pathology
Interpenetration of low‐dimensional networked structural motifs crucially affects porosity, stability, and properties of the whole reticular framework. However, varying and controlling the manner of interpenetration is still challenging. Herein, a porous hydrogen‐bonded organic framework (HOF) with wvm ‐like weave constructed by triaxially woven chicken wires of X‐shaped tetra‐armed tetrakis(carboxybiphenyl)ethene CBPE , formally 4′,4′′′,4,4‐(ethene‐1,1,2,2‐tetrayl)tetrakis(1,1′‐biphenyl‐4‐carboxylic acid), is reported. The structure is a contrast to a non‐interpenetrated layered framework composed of tetrakis(4‐carboxyphenyl)ethene CPE . This exotic framework of CBPE is due to the disproportionate conformation of the outer four phenylene rings in the peripheral biphenyl arms. The activated framework CBPE‐1a exhibits thermal stability up to 220 °C and a BET surface area of 555 m 2 g −1 . Additionally, the HOF shows mechanochromic behavior in terms of fluorescence color and quantum efficiency. The achievement of the present HOFs can provide insight into constructing a new type of functional porous organic materials with interwoven network structures.