Related Experiment Video
Updated: Feb 18, 2026
07:14
Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
3.8K
Modulating Room-Temperature Phosphorescence by Coordination Interactions and Structural Rigidity in Dual-Ligand MOFs
Xiaolin Yu1, Zixuan Zhou1, Dmitry I Pavlov1,2
1China-Russia Belt and Road Joint Laboratory for Intelligent Chemistry and Advanced Materials of Liaoning Province, School of Chemistry, Dalian University of Technology, Dalian116024, China.
Inorganic Chemistry
|February 17, 2026
Summary
Researchers developed new metal-organic frameworks (MOFs) with tunable room-temperature phosphorescence (RTP). This breakthrough enhances information security through advanced anticounterfeiting strategies and provides insights into MOF design for RTP materials.
Area of Science:
- Materials Science
- Photochemistry
- Coordination Chemistry
Background:
- Room-temperature phosphorescence (RTP) in metal-organic frameworks (MOFs) is crucial for data security and anti-counterfeiting.
- Understanding the interplay between coordination interactions and framework rigidity is key to controlling RTP properties.
Purpose of the Study:
- To investigate the impact of coordination interactions and structural rigidity on RTP behavior in MOFs.
- To design and synthesize novel MOFs with precisely controlled RTP performance.
- To develop a time-resolved information encryption and anticounterfeiting strategy.
Main Methods:
- Dual-ligand cooperative design strategy (M + LC + LX) to modulate ligand coordination and framework rigidity.
- Construction and characterization of four novel Cadmium-based MOFs (Cd-MOFs).
- Single-crystal X-ray diffraction (SCXRD) analysis and Density Functional Theory (DFT) calculations.
Main Results:
- Precise control over RTP performance was achieved in the synthesized Cd-MOFs.
- Direct coordination of the carboxylate ligand (LC) is essential for RTP activation.
- Framework dimensionality and suppression of vibrational relaxation by auxiliary ligands extended triplet-state lifetimes up to 153 ms.
- A time-resolved encryption strategy was developed using distinct afterglow and color evolution.
Conclusions:
- The study elucidates the synergistic mechanism of coordination interactions and structural rigidity on RTP behavior in MOFs.
- Provides a rational design approach for high-performance RTP functional materials.
- Demonstrates a novel strategy for information encryption and anticounterfeiting with enhanced security.
Related Concept Videos
01:26Variables Affecting Phosphorescence and Fluorescence
1.5K
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
1.5K
01:14Photoluminescence: Applications
1.1K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
1.1K
01:25Fluorescence and Phosphorescence: Instrumentation
1.6K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
1.6K
01:23Photoluminescence: Fluorescence and Phosphorescence
4.0K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
4.0K
03:02Colors and Magnetism
14.2K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.2K
02:58Crystal Field Theory - Octahedral Complexes
31.1K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
31.1K