ABSTRACT This 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. Graphical Abstract

中文翻译：

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一种在溶液中合成自立柱[5]芳烃基二维共价有机单层的简便方法

摘要本报告描述了一种简便的方法，通过该方法，在不使用任何表面辅助生长或预组织的情况下，通过平面三醛与 A1/ A2-二氨基取代的柱[5]芳烃(DAP5)。在形成的单层（DAP5-COM-1 和 DAP5-COM-2）中，位于二维聚合物平面外的管状五边形柱[5]芳烃单元有效地抑制了层间 π-π 堆积相互作用。DAP5-COM-1 和 DAP5-COM-2 都可以转移到固体表面上进行进一步表征，并且发现它们具有不寻常的荧光上转换特性。图形概要