A new kind of metal-organic framework (MOF) thin film were prepared by using aggregation-induced emission (AIE) based ligand through a liquid-phase epitaxial (LPE) layer-by-layer (LBL) spraying method, which is named AIE surface-coordinated metal-organic frameworks thin film (AIE-SURMOF). The obtained AIE-SURMOF has highly growth orientation and homogeneous thin film, showing strong fluorescent property. Furthermore, by loading chiral guest in the MOF pore, the formed chiral encapsulated AIE-SURMOF can clearly indicate obvious circularly polarized luminescence performance.

Abstract

The development of new metal-organic frameworks (MOFs) thin films is important for expanding their functions and applications. Herein, we first report a new kind of MOF thin film by using aggregation-induced emission (AIE) dicarboxyl ligand through a liquid-phase epitaxial (LPE) layer-by-layer (LBL) spraying method (named AIE surface-coordinated metal-organic frameworks thin film, AIE-SURMOF). The obtained AIE-SURMOF Zn₄O(TPE)₃ (ZnTPE) has highly growth orientation and homogeneous thin film, showing strong fluorescent property. Furthermore, by loading chiral guest in the MOF pore, the formed chiral encapsulated AIE-SURMOF can clearly indicate obvious circularly polarized luminescence performance with g_lum of 0.01. This study provides new MOF thin film and new strategy for expanding function and application of MOF materials.