gsch_a_1711906_sm9610.docx (16.6 MB)
A facile method for the synthesis of free-standing pillar[5]arene-based two-dimensional covalent organic monolayers in solution
journal contribution
posted on 2020-01-07, 16:28 authored by Hui Qiang, Wei-Bo Hu, Tao Chen, Yahu A. Liu, Xue-Shun Jia, Biao Jiang, Ke WenThis report describes a facile method by which, without using any surface-assisted growth or pre-organisation, free-standing two-dimensional (2D) covalent organic monolayers (COMs) were synthesised through condensation reactions of planar tri-aldehydes with A1/A2-diamino-substituted pillar[5]arene (DAP5). In the as-formed monolayers (DAP5-COM-1 and DAP5-COM-2), the tubular pentagonal pillar[5]arene units positioned out of the 2D polymer planes suppress efficiently the interlayer π-π stacking interactions. Both DAP5-COM-1 and DAP5-COM-2 can be transferred onto solid surfaces for further characterisation and were found to possess unusual fluorescence up-conversion property.