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journal article·2026-05Open access

Enhanced Energy Transfer from a Metal–Organic Framework to a Highly Confined Organic Phosphorescent Dye

Bahram Hosseini Monjezi, Thomas Kasper, Gloria Hong, Changfeng Si, Robert Oestreich, Oliver Weingart, Peter G. Weidler, Christof Wöll, Eli Zysman‐Colman, Christoph Janiak, Stefan Bräse, Klaus Müller‐Buschbaum, Alexander Knebel

Advanced Science· Volume 13· Issue 30
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Abstract

ABSTRACT Three‐Dimensional Metal–Organic Frameworks (MOFs) are crystalline, porous hybrid materials with well‐defined pore structures, offering isotropic adsorption of molecules in their pore system. We designed and synthesized an organic, phosphorescent di‐ tert ‐butyl‐carbazole dibenzophenazine chromophore, 11‐DTCz‐BP , with an appropriate size for a tight hand‐to‐glove fit into the 1D pore channels of MIL‐68(In). MOF particles are synthesized, and homogeneous films are prepared on Au‐substrates through electrochemical deposition. The steric demand of 11‐DTz‐BP yields a crystallographic ordered confinement inside the pores of MIL‐68(In), proven by XRD and DFT calculations. Through this approach, it was possible to obtain controlled packing of the chromophore and lower emission quenching factors. Detailed spectroscopic analysis was performed using (cryo)fluorescence spectroscopy on powders and thin films. We consider Förster Resonance Energy Transfer (FRET) as a process of energy transfer between the pore walls of MIL‐68 and 11‐DTCz‐BP . The aggregation control leads to a quantum yield enhancement, while FRET enables long lifetimes of phosphorescence at room‐temperature.
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Research context

Materials processing

OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Nanocluster Synthesis and Applications · Luminescence and Fluorescent Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Functional Interfaces (IFG) Karlsruhe Institute of Technology (KIT) Karlsruhe Germany

Institute for Nuclear Waste Disposal (INE) Karlsruhe Institute of Technology (KIT) Karlsruhe Germany

Institute of Inorganic and Analytical Chemistry Justus Liebig University Giessen Giessen Germany

Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Karlsruhe Germany

Organic Semiconductor Centre EaStCHEM School of Chemistry University of St Andrews St Andrews UK

Institute of Inorganic and Structural Chemistry Heinrich Heine University Düsseldorf Düsseldorf Germany

Institute of Theoretical and Computational Chemistry Heinrich Heine University Düsseldorf Düsseldorf Germany

Institute of Biological and Chemical Systems – Functional Molecular Systems (IBCS‐FMS) Karlsruhe Institute of Technology (KIT) Karlsruhe Germany

Center of Materials Research (LAMA) Justus Liebig University Giessen Giessen Germany

Otto Schott Institute for Materials Research Center of Energy and Environmental Chemistry II Friedrich Schiller University Jena Jena Germany

Funding

Deutsche Forschungsgemeinschaft · China Scholarship Council · Engineering and Physical Sciences Research Council · Bundesministerium für Umwelt, Naturschutz, Bau und Reaktorsicherheit

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