Abstract
The emergence and development of aggregation induced emission (AIE) have attracted worldwide attention due to its unique photophysical phenomenon and for removing the obstacle of aggregation-caused quenching (ACQ) which is the most detrimental process thereby making AIE an important and promising aspect in various fields of fluorescent material, sensing, bioimaging, optoelectronics, drug delivery system, and theranostics. In this review, we have discussed insights and explored recent advances that are being made in AIE active materials and their application in sensing, biological cell imaging, and drug delivery systems, and, furthermore, we explored AIE active fluorescent material as a building block in supramolecular chemistry. Herein, we focus on various AIE active molecules such as tetraphenylethylene, AIE-active polymer, quantum dots, AIE active metal-organic framework and triphenylamine, not only in terms of their synthetic routes but also we outline their applications. Finally, we summarize our view of the construction and application of AIE-active molecules, which thus inspiring young researchers to explore new ideas, innovations, and develop the field of supramolecular chemistry in years to come.
Highlights
Academic Editors: Youhong TangThe recent development in the field of supramolecular chemistry, especially in chemo/biosensing, biological cell imaging, and drug delivery systems, has gained a lot of attention due to its high quantum yield and good photostability [1,2,3]
Hao and co-workers synthesized an amphiphilic conjugated polymeric micelle with 1H-pyrrole-1-propionic acid (MAL)-poly(ethylene glycol) (PEG)-Tripp-bearing comprising of aggregation induced emission (AIE) imaging and Forster resonance energy transfer (FRET) which self assembles itself to micelle further loaded with DOX drug
To overcome the aggregation caused quenching (ACQ) process, the Tang group developed another phenomenon known as AIE which is commonly and widely used in many fields
Summary
The recent development in the field of supramolecular chemistry, especially in chemo/biosensing, biological cell imaging, and drug delivery systems, has gained a lot of attention due to its high quantum yield and good photostability [1,2,3]. Hexaphenylsilole (HPS) is the common example of the AIE active molecule which exhibits enhancement in fluorescence in an aggregate state The motions involved, such as restriction of intramolecular motion along with rotation and vibration mechanisms in the AIE active phenomenon, are well explained and accepted [21,22]. Due to the unique photophysical phenomenon of AIE activity, the AIE active luminogens shows different “turn-on” sensing mechanism via various interactions involving electrostatic interactions, hydrogen bonding, van der Waals interactions, and metal-ligand interactions Another approach is through recognition of analyte with “turn-on” fluorescence via restriction of intramolecular rotation. Reprinted from reference [13](b) with the permission of the Royal carboxylic diimide) molecule with increasing water content and showing the aggregation-caused aggregation-caused quenching (ACQ) phenomenon.
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