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Donor-Acceptor MOF Enabling Efficient Electrochemiluminescence Based on TSCT-TADF. | LitMetric

Donor-Acceptor MOF Enabling Efficient Electrochemiluminescence Based on TSCT-TADF.

J Phys Chem Lett

College of Chemistry, Chemical Engineering and Environment, Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou, China 363000.

Published: November 2024

AI Article Synopsis

  • Electrochemiluminescence (ECL) is a valuable technique for studying surface energy states and understanding charge transfer mechanisms in new luminescent materials.
  • The research focuses on thermally activated delayed fluorescence (TADF) using donor-acceptor metal-organic frameworks (D-A MOFs), which improve ECL intensity through the incorporation of phenyl-carbazole derivatives.
  • Computational analysis shows that efficient charge transfer is achieved by optimizing the arrangement of donor and acceptor molecules, which enhances ECL performance in these hybrid structures.

Article Abstract

Electrochemiluminescence (ECL) is an extensively studied luminescence technique recognized for its efficacy in investigating surface energy states. Effective utilization of ECL to explore and probe the charge transfer mechanisms facilitated by novel luminescent materials is crucial. In this study, we demonstrate thermally activated delayed fluorescence (TADF) based on spatial charge transfer through the precisely controlled synthesis of luminescent materials, which is achieved by incorporating phenyl-carbazole derivatives as donor guests within acceptor-hosted metal-organic frameworks (D-A MOFs). These hybrid structures exhibit superior ECL intensities compared with their monomeric counterparts. Mechanistic investigation by DFT calculation reveals that the physically separated yet spatially closed D-A configuration induces efficient intermolecular through-spatial charge transfer (TSCT), leading to efficient ECL through tuning of the dihedral angle of the guest molecules to enhance π-π interactions. This study introduces a strategy for precise modulation of spatial charge transfer at the molecular level in the programmable synthesis of ECL luminophores.

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Source
http://dx.doi.org/10.1021/acs.jpclett.4c01967DOI Listing

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