Harvesting Multicolor Photoluminescence in Nonaromatic Interpenetrated Metal–Organic Framework Nanocrystals via Pressure‐Modulated Carbonyls Aggregation

Abstract

Interpenetrated metal‐organic frameworks (MOFs) with non‐aromatic ligands provide a unique platform for adsorption, catalysis, and sensing applications. However, non‐emission and the lack of optical property tailoring make it challenging to fabricate smart responsive devices with non‐aromatic interpenetrated MOFs based on ligand‐centered emission. In this paper, we introduce the pressure‐induced aggregation effect in non‐aromatic interpenetrated Zn4O(ADC)4(Et3N)6 (IRMOF‐0) nanocrystals (NCs), where carbonyl groups aggregation results in O‐O distances smaller than the sum of the van der Waals radii (3.04 Å), triggering the photoluminescence turn‐on behavior. It is noteworthy that the IRMOF‐0 NCs display an ultra‐broad emission tunability of 130 nm from deep blue (440 nm) to yellow (570 nm) upon release to ambient conditions at different pressures. The eventual retention of through‐space n‐π* interactions in different degrees via pressure treatment is primarily responsible for achieving a controllable multi‐color emission behavior in initially non‐emissive IRMOF‐0 NCs. The fabricated multi‐color phosphor‐converted light‐emitting diodes based on the pressure‐treated IRMOF‐0 NCs exhibit excellent thermal, chromaticity, and fatigue stability. Our proposed strategy not only imparts new vitality to non‐aromatic interpenetrated MOFs but also offers new perspectives for advancements in the field of multi‐color displays and daylight illumination.This article is protected by copyright. All rights reserved

Halogen-Dependent Deep-Blue Circularly Polarized Emitters with Ultrahigh-Color-Purity Under High Pressure

“…[26][27][28][29][30][31][32][33][34][35][36] Currently, strengthening noncovalent interactions via the hydrostatic pressure effect is utilized to enhance luminescence, improve conductivity, narrow the band gap, and optimize chiroptical activity in perovskites, metal-organic frameworks, and organic molecules. [37][38][39][40][41][42][43][44][45] Thus, applying hydrostatic pressure to LDMHPs is expected to achieve FE emission through pressureenhanced halogen•••halogen interactions, thereby clarifying the structure-property relationship between structural distortion, noncovalent interactions, and FE emission behavior.…”