Synthesis, properties and photo-responsive behavior of luminescent side chain polymers containing D–π-A α-cyanostilbene units

2019 ◽  
Vol 10 (21) ◽  
pp. 2706-2715 ◽  
Author(s):  
Yongjie Yuan ◽  
Lifang He ◽  
Jindi Li ◽  
Hailiang Zhang
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Side Chain ◽  
Aggregation Induced Emission ◽  
High Solid ◽  
Emission Enhancement ◽  
Synthesis Properties ◽  
Responsive Behavior ◽  
Solid Fluorescence

A series of luminescent side chain polymers with aggregation-induced emission enhancement characteristics, high solid fluorescence quantum yield, and reversible fluorescence photo-responsive properties were prepared.

scholarly journals Flavanone-Based Fluorophores with Aggregation-Induced Emission Enhancement Characteristics for Mitochondria-Imaging and Zebrafish-Imaging

Molecules ◽  
2020 ◽  
Vol 25 (14) ◽  
pp. 3298
Author(s):  
Na Li ◽  
Liyan Liu ◽  
Huiqing Luo ◽  
Huaqiao Wang ◽  
Depo Yang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Fluorescent Dyes ◽  
Fluorescence Emission ◽  
In Vivo Studies ◽  
Aggregation Induced Emission ◽  
Emission Enhancement ◽  
High Fluorescence ◽  
Potential Use

Fluorophores with aggregation-induced emission enhancement (AIEE) characteristics applied in bioimaging have attracted more and more attention in recent years. In this work, a series of flavanone compounds with AIEE characteristics was developed and applied to fluorescence imaging of mitochondria and zebrafish. The compounds were readily prepared by the thermal dehydration of chalcone that was obtained by the reaction of o-hydroxyacetophenone and benzaldehyde. Two of these compounds showed significant AIEE characteristics by fluorescence performance experiments, including optical spectra, fluorescence spectra, fluorescence quantum yield (φF), fluorescence lifetime, and scanning electron microscopy (SEM). Compared with traditional organic fluorescent dyes, these compounds have high fluorescence emission and high fluorescence quantum yield in solid or aggregated state, which overcomes the shortcoming of aggregation-caused quenching (ACQ). More importantly, the two compounds exhibited low cytotoxicity and good cytocompatibility in A549 lung cells at the experimental concentration range and they specifically targeted mitochondria, which make it of great potential use in mitochondria labeling. In addition, they were embryonic membrane permeable and had different affinities for different tissues and organs of zebrafish, but mainly distributed in the digestive system, providing a basis for the application of such compounds in bioimaging. These AIEE compounds with superior properties could be of great potential use in mitochondria imaging and other in vivo studies.

scholarly journals Achieving remarkable and reversible mechanochromism from a bright ionic AIEgen with high specificity for mitochondrial imaging and secondary aggregation emission enhancement for long-term tracking of tumors

2020 ◽  
Vol 4 (3) ◽  
pp. 941-949 ◽  
Author(s):  
Xinzhe Yang ◽  
Qian Wang ◽  
Peiyu Hu ◽  
Chao Xu ◽  
Wenjing Guo ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Cancer Cells ◽  
Fluorescence Quantum Yield ◽  
High Specificity ◽  
Emission Enhancement ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

An ionic AIEgen with high fluorescence quantum yield shows remarkable and reversible mechanochromism as well as excellent mitochondrial imaging of cancer cells and long-term tracking of tumors.

Halogenated tetraphenylethene with enhanced aggregation-induced emission: an anomalous anti-heavy-atom effect and self-reversible mechanochromism

2019 ◽  
Vol 55 (99) ◽  
pp. 14938-14941 ◽  
Author(s):  
Pengfei Xu ◽  
Qianqian Qiu ◽  
Xinru Ye ◽  
Mengru Wei ◽  
Wenbin Xi ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Heavy Atom ◽  
Aggregation Induced Emission ◽  
Heavy Atom Effect ◽  
Atom Effect

Halogenated tetraphenylethene derivatives show an anomalous anti-heavy-atom effect where introducing heavy halogens into the typical AIEgen greatly improves the fluorescence quantum yield upon aggregation, and a self-reversible mechanochromism.

Preparation and properties of side chain liquid crystalline polymers with aggregation-induced emission enhancement characteristics

2018 ◽  
Vol 6 (26) ◽  
pp. 7119-7127 ◽  
Author(s):  
Yongjie Yuan ◽  
Jindi Li ◽  
Lifang He ◽  
Yiwu Liu ◽  
Hailiang Zhang
Keyword(s):  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Aggregation Induced Emission ◽  
Crystalline Polymers ◽  
Emission Enhancement

A series of polymers with aggregation-induced emission enhancement characteristics and stable liquid crystalline properties were prepared.

scholarly journals Solid-State Highly Efficient DR Mono and Poly-Dicyano-Phenylenevinylene Fluorophores

2018 ◽  
Author(s):  
Barbara Panunzi ◽  
Rosita Diana ◽  
Simona Concilio ◽  
Lucia Sessa ◽  
Rafi Shikler ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Spectroscopic Properties ◽  
Crystallographic Data ◽  
Time Dependent ◽  
Aggregation Induced Emission ◽  
Solid Films ◽  
Highly Efficient ◽  
Organic Solid

A highly efficient deep red (DR) emitting organic solid based on a dicyano-phenylenevinylene derivative was reported. The structural and spectroscopic properties of the solid have been described in terms of crystallographic data and time dependent DFT analysis. A noteworthy fluorescence quantum yield of 53% was observed for the brightest emitter cast into solid films. This result can be explained in terms of aggregation-induced emission (AIE) effect.

scholarly journals Synthesis, enantioseparation and photophysical properties of planar-chiral pillar[5]arene derivatives bearing fluorophore fragments

2019 ◽  
Vol 15 ◽  
pp. 1601-1611 ◽  
Author(s):  
Guojuan Li ◽  
Chunying Fan ◽  
Guo Cheng ◽  
Wanhua Wu ◽  
Cheng Yang
Keyword(s):  
Quantum Yield ◽  
Click Reaction ◽  
Photophysical Properties ◽  
High Yield ◽  
Mixed Solution ◽  
Aggregation Induced Emission ◽  
Emission Enhancement ◽  
Emission Quenching ◽  
High Fluorescence ◽  
Induced Aggregation

Planar chiral pillar[5]arene derivatives (P5A-DPA and P5A-Py) bearing bulky fluorophores were obtained in high yield by click reaction. The photophysical properties of both compounds were investigated in detail. P5A-DPA with two 9,10-diphenylanthracene (DPA) pigments grafted on the pillar[5]arene showed a high fluorescence quantum yield of 89.5%. This is comparable to the monomer DPA-6, while P5A-Py with two perylene (Py) pigments grafted on the pillar[5]arene showed a significantly reduced quantum yield of 46.4% vs 78.2% for the monomer Py-6. The oxygen-through-annulus rotation of the phenolic units was inhibited for both compounds due to the bulky chromophore introduced, and the resolution of the enantiomers was achieved due to the bulky size of the fluorophores. The absolute configuration of the enantiomers was determined by circular dichroism (CD) spectra. The solvent-induced aggregation behavior was investigated with the enantiopure P5A-DPA and P5A-Py. It was found that the CD signals were enhanced by aggregation. P5A-DPA showed aggregation-induced emission enhancement, while P5A-Py showed aggregation-induced emission quenching, accompanied by excimer emission when aggregating in water and THF mixed solution.

Synthesis and Aggregation-Induced Emission Feature of Series of Polysiloxanes Containing Triphenylpyrrole Side-Chain

2020 ◽  
Vol 842 ◽  
pp. 47-52
Author(s):  
Yin Yin ◽  
Li Chao Dong ◽  
Na Jin ◽  
Yan Guan ◽  
Jun Ge Zhi ◽  
...  
Keyword(s):  
Fluorescence Intensity ◽  
Vinyl Monomer ◽  
Emission Feature ◽  
Side Chain ◽  
Thermal Stabilities ◽  
Aggregation Induced Emission ◽  
Water Fraction ◽  
Chiral Polymers ◽  
Emission Enhancement ◽  
Optical Rotations

A series of aggregation-induced emission (AIE) active polysiloxanes (P7-1~P7-2, P29-1~P29-6) were prepared through hydrosilylation between polymethylhydrosiloxane (PMHS, DP=7 or 29) and AIE-active vinyl monomer 1-(4'-allyloxy-biphenyl)-2,5-diphenyl pyrrole (M-TPP), or with optical active monomer cholesteryl allyloxy ether (M-Chol*). Monomer M-TPP and all of the polymers exhibits aggeragation-induced emission enhancement properties. The fluorescence intensity of M-TPP in THF/H2O mixtures increases when the water fraction is higher than 60%, while is over 20% for polysiloxanes, which mainly because the entanglement of the flexible polysiloxane main-chain can restrict the molecular motion of triphenylpyrrole (TPP) derivates and induce the increasing of the fluorescence intensity. Moreover, the maximum relative fluorescence intensity (I/I0) is equal to 4 for M-TPP and 1.4~4.9 for polysiloxanes, and the grafted degree of the TPP derivative has effect on the AIE properties of polymers. The specific optical rotations of the chiral polymers increase with increasing the content of chiral cholesteryl ether moieties. All the target polymers possess good thermal stabilities and their decomposition points (Td) are greater than 320°C.

Enhanced fluorescence quantum yield of syndiotactic side-chain TPE polymers via Rh-catalyzed carbene polymerization: influence of the substitution density and spacer length

2019 ◽  
Vol 10 (13) ◽  
pp. 1575-1584 ◽  
Author(s):  
Xiao Li ◽  
Yuhao Sun ◽  
Jian Chen ◽  
Zhongying Wu ◽  
Pin Cheng ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Quantum Yields ◽  
Side Chain ◽  
Enhanced Fluorescence ◽  
Spacer Length ◽  
Fluorescence Quantum Yields

The fluorescence quantum yields of the TPE-based C1 polymers also increase with the shortened spacer lengths and further improve by about 20% as compared with the corresponding C2 polyacrylate counterparts.

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