Boron-Oxo Cluster-Based Hydrogen-Bonded Framework for Luminescent Tuning
A zinc boron-oxo cluster-based structure ({Zn<sub>2</sub>(μ<sub>2</sub>-OH)(Dmg)<sub>4</sub>[B<sub>3</sub>O<sub>3</sub>(OH)] [B<sub>6</sub>O<sub>7</sub>(OH)<sub>2</sub>]}, <b>BOC-23</b>) was synthesized solvothermally using a dioxime (DmgH<sub>2</sub>) ligand. Two polyboroxole units ([B<sub>3</sub>O<sub>7</sub>(OH)] and [B<sub>6</sub>O<sub>11</sub>(OH)<sub>2</sub>]) are linked to Dmg via oxygen-sharing, forming an organic-inorganic hybrid macrocyclic cluster coordinating two Zn<sup>2+</sup> ions. Peripheral hydroxyl groups of the cluster facilitate the formation of a 3D hydrogen-bonded network in <b>BOC-23</b> through intermolecular O-H···O interactions, forming a rigid framework that enhances stability and modulates guest luminescence via confinement. Systematic studies on host-guest interactions via <i>in situ</i> encapsulation of distinct luminescent guests reveal luminescence tuning from blue to cyan and red, alongside distinct synergistic luminescence enhancement in specific host-guest pairs. Notably, <b>BOC-23</b> is a crystalline boron-oxo cluster host that enables in situ encapsulation of multiple luminescent guests─a feature not observed in prior boron-oxo clusters. This capability is exemplified by <b>DEAC@BOC-23</b>, which exhibits a quantum yield of 18.8% and a lifetime of 2.99 ns, representing 25 times and 6 times enhancements over pristine DEAC, respectively.
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2026-03-23
- DOI
- https://doi.org/10.1021/acs.inorgchem.6c00431
- Primary Topic
- Metal-Organic Frameworks: Synthesis and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00