What type of organic molecules can be summarised as derivatives formed when TPE is replaced by different electronic properties such as carboxyl, aldehyde, methyl, hydroxyl, amino and other groups, for example, electron-rich or electron-deficient?
The organic molecules formed by substituting groups onto the tetraphenylethylene (TPE) core are classified as AIEgens (Aggregation-Induced Emission Luminogens).
These TPE derivatives are created by replacing hydrogens with:
Electron-donor groups (e.g., -NPh₂, -OMe), which push electron density toward the core.
Electron-acceptor groups (e.g., -CN, -C=O, -NO₂), which pull electron density away.
This substitution strategy creates several key classes of functional materials:
D-π-A Systems: Combining donor and acceptor groups enables Intramolecular Charge Transfer (ICT), leading to tunable emission colors and properties like solvatochromism (color change with solvent polarity).
Mechanochromic Materials: The altered electronic structure allows emission color to change upon mechanical grinding or pressure.
TPE-based MOFs and Polymers: Functionalizing TPE with metal-binding or polymerizable groups allows creation of porous frameworks and processable materials for sensing and optoelectronics.
In essence, TPE derivatives are a versatile family of luminescent materials whose properties—including color, sensitivity, and function—are precisely engineered through strategic substitution with electron-rich or electron-deficient groups. Their primary value lies in their intense emission in the solid or aggregated state (the AIE effect).
Zhuo Linfeng , I really don't understand your question.
Derivatives of PTE are described in
https://www.sciencedirect.com/science/article/abs/pii/S0143720822002492
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