Related Experiment Video
Updated: Aug 3, 2026
08:58
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
Published on: May 4, 2011
Oxygen-insensitive phosphorescence in water from a Pt-doped supramolecular array
Laura Straub1, Darío González-Abradelo, Cristian A Strassert
1Physikalisches Institut and Center for Nanotechnology (CeNTech) Westfälische Wilhelms-Universität Münster, Heisenbergstraße 11, D-48149, Münster, Germany. ca.s@wwu.de.
Chemical Communications (Cambridge, England)
|October 17, 2017
Summary
Researchers created a self-assembled array using platinum(II) complexes. This array enables oxygen-insensitive phosphorescence in aqueous solutions by shielding light-emitting molecules.
Area of Science:
- Supramolecular chemistry
- Materials science
- Photochemistry
Background:
- Platinum(II) complexes are known for their luminescence properties.
- Achieving stable luminescence in aqueous environments can be challenging due to oxygen quenching.
- Supramolecular self-assembly offers strategies for controlling material properties.
Purpose of the Study:
- To develop a novel supramolecular array for enhanced luminescence.
- To achieve oxygen-insensitive phosphorescence in an aqueous phase.
- To investigate the role of self-assembly in protecting luminescent emitters.
Main Methods:
- Synthesis of polyvinylpyridine functionalized with adamantyl-substituted Pt(II) complexes.
- Formation of a supramolecular array through self-assembly.
- Complexation of adamantyl units with cyclodextrins for aqueous phase transfer.
- Characterization of phosphorescence properties, including oxygen sensitivity.
Main Results:
- A stable supramolecular array was successfully constructed.
- Complexation with cyclodextrins facilitated transfer into the aqueous phase.
- The array exhibited oxygen-insensitive phosphorescence.
- Diffusional shielding by the self-assembled structure protected the Pt(II) emitters.
Conclusions:
- The developed supramolecular array provides a robust platform for oxygen-insensitive luminescence.
- Self-assembly is a powerful tool for designing functional materials with tailored photophysical properties.
- This approach offers potential for applications requiring stable luminescence in aqueous media.
More Related Videos
Related Concept Videos
01:23Photoluminescence: Fluorescence and Phosphorescence
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...
01:26Variables Affecting Phosphorescence and Fluorescence
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...
01:14Photoluminescence: Applications
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...
01:25Fluorescence and Phosphorescence: Instrumentation
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.