Photo-curable 3D Printing of Circularly Polarized Afterglow Metal-Organic Framework Monoliths.

Developing coordination complexes (such as metal-organic frameworks, MOFs) with circularly polarized luminescence (CPL) is currently attracting tremendous attention and remains a significant challenge on achieving MOF with circularly polarized afterglow. Herein, we first reported MOFs based circularly polarized afterglow by combining chiral induction approach and turned the afterglow times by using the auxiliary ligands regulation strategy. The obtained chiral R/S-ZnIDC, R/S-ZnIDC(bpy) and R/S-ZnIDC(bpe) containing a similar structure unit display different afterglow times with 3 s, 1 s and < 0.1 s respectively which attribute to that the longer auxiliary ligand hinders the energy transfer through the hydrogen bonding. The obtained chiral complexes reveal strong CD signal, obvious PL afterglow feature and strong CPL performance (g lum up to 3.7 × 10 -2 ). Furthermore, we first proposed the photo-curing 3D printing method to prepare various chiral MOFs based monoliths from 2D patterns to 3D scaffolds for anti-counterfeiting and information encryption applications. This work not only develops chiral complexes monoliths by photo-curing 3D printing technique, but opens a new strategy to achieve tunable CPL afterglow in the optical applications. This article is protected by copyright. All rights reserved.