Hybridization of Triphenylamine and Salicylaldehyde: A Facile Strategy to Construct Aggregation‐Induced Emission Luminogens with Excited‐State Intramolecular Proton Transfer for Specific Lipid Droplets and Gram‐Positive Bacteria Imaging

2020 ◽  
Vol 8 (14) ◽  
pp. 1902027 ◽  
Author(s):  
Wei Yin ◽  
Yue Li ◽  
Nan Li ◽  
Weiyao Yang ◽  
Hao An ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Lipid Droplets ◽  
Intramolecular Proton Transfer ◽  
Gram Positive ◽  
Aggregation Induced Emission ◽  
Gram Positive Bacteria ◽  
Specific Lipid

Fluorescence turn-on detection of cysteine over homocysteine and glutathione based on “ESIPT” and “AIE”

2015 ◽  
Vol 7 (12) ◽  
pp. 5028-5033 ◽  
Author(s):  
Hualong Liu ◽  
Xiaoyan Wang ◽  
Yu Xiang ◽  
Aijun Tong
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Aggregation Induced Emission ◽  
Emission Properties ◽  
Turn On ◽  
Fluorescence Turn On

A turn-on detection of cysteine (Cys) based on excited-state intramolecular proton transfer and aggregation-induced emission properties of a salicylaldehyde azine derivative has been established.

scholarly journals Molecular and Crystalline Requirements for Solid State Fluorescence Exploiting Excited State Intramolecular Proton Transfer

2019 ◽  
Author(s):  
Michael Dommett ◽  
Miguel Rivera ◽  
Matthew T. H. Smith ◽  
Rachel Crespo Otero
Keyword(s):  
Excited State ◽  
Solid State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Extensive Study ◽  
Structure Property ◽  
Aggregation Induced Emission ◽  
Organic Systems ◽  
Structure Property Relationships ◽  
Formidable Challenge

Aggregation induced emission offers a route to the development of emissive technologies based on solely organic systems. However, maximising fluorescence quantum efficiencies (QE) is a formidable challenge in attaining first-principles materials design, due to the interplay between the electronic structure of the chromophore and the molecular crystal. The identification of radiative and nonradiative channels, and how these are affected by aggregation, can rationalise the emissive properties of materials and aid in the design of yet more efficient fluorophores. In the current work, we examine the mechanism behind aggregation induced emission in two related families of compounds with lasing properties, which undergo excited state intramolecular proton transfer (ESIPT). We systematically investigate competing excited state decay channels in a total of eleven crystals to evaluate the factors needed for efficient ESIPT fluorophores, aided by a full evaluation of the crystal structures, exciton coupling, and exciton hopping rates. We show that in addition to the restriction of nonradiative pathways, an efficient ESIPT is essential to maximise the QE in the solid state. This extensive study of structure-property relationships for fluorophores based on the ESIPT mechanism bridges the understanding of molecular photophysics with crystal structure, accelerating the development of highly efficient solid state emitters.

A multi-binding site hydrazone-based chemosensor for Zn(II) and Cd(II): A new strategy for detection of metal ions in aqueous media based on aggregation-induced emission

2021 ◽  
Author(s):  
Min Wu ◽  
Dong-Dong Yang ◽  
Han-Wen Zheng ◽  
Qiong-Fang Liang ◽  
Jia-Bin Li ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Metal Ions ◽  
Binding Site ◽  
Aqueous Media ◽  
Intramolecular Proton Transfer ◽  
Aggregation Induced Emission ◽  
New Strategy

A multi-binding site chemosensor, N-(3-methoxy-2-hydroxybenzylidene)-3-hydroxy-2-naphthahydrazone (H3L) with excited-state intramolecular proton transfer (ESIPT) behaviour was prepared and characterized. It possesses no aggregation-induced emission (AIE) characteristic, but can detect Cd2+ and Zn2+...

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