Synthesis and fluorescence properties of novel squarylium–boron complexes

2017 ◽  
Vol 4 (8) ◽  
pp. 1522-1527 ◽  
Author(s):  
Yasuhiro Kubota ◽  
Masahiro Tsukamoto ◽  
Katsuhiro Ohnishi ◽  
Jiye Jin ◽  
Kazumasa Funabiki ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Fluorescence Properties ◽  
Enhanced Fluorescence ◽  
Boron Complexes ◽  
Squarylium Dyes

Novel squarylium–boron complexes showed a significantly enhanced fluorescence quantum yield compared to the corresponding uncomplexed squarylium dyes.

UV-Trained and Metal-Enhanced Fluorescence of Biliverdin and Biliverdin Nanoparticles

Nanoscale ◽  
2021 ◽  
Author(s):  
Parinaz Fathi ◽  
Ayman Roslend ◽  
Kritika Mehta ◽  
Parikshit Moitra ◽  
Kai Zhang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Biomedical Imaging ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence

Increasing the fluorescence quantum yield of fluorophores is of great interest for in vitro and in vivo biomedical imaging applications. At the same time, photobleaching and photodegradation resulting from continuous...

An exemplary relationship between the extent of cofacial aggregation and fluorescence quantum yield as exhibited by quaternized amphiphilic phthalocyanines

2014 ◽  
Vol 43 (15) ◽  
pp. 5886-5892 ◽  
Author(s):  
Thiago Teixeira Tasso ◽  
Yasuhiro Yamasaki ◽  
Taniyuki Furuyama ◽  
Nagao Kobayashi
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Fluorescence Properties

A good correlation between aggregation and fluorescence properties of amphiphilic phthalocyanines can be observed.

Synthesis of ZnO Quantum Dots with Enhanced Fluorescence Quantum Yield

2016 ◽  
Vol 16 (7) ◽  
pp. 7622-7629 ◽  
Author(s):  
Pospisilova Martina ◽  
Mrazek Jiri ◽  
Kettou Sofiane ◽  
Dusikova Monika ◽  
Matuska Vit ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Enhanced Fluorescence ◽  
Zno Quantum Dots

Ultrafast spectroscopy of biliverdin dimethyl ester in solution: pathways of excited-state depopulation

2020 ◽  
Vol 22 (35) ◽  
pp. 19903-19912
Author(s):  
Yangyi Liu ◽  
Zhuang Chen ◽  
Xueli Wang ◽  
Simin Cao ◽  
Jianhua Xu ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Yield ◽  
Quantum Efficiency ◽  
Fluorescence Quantum Yield ◽  
Ultrafast Spectroscopy ◽  
Fluorescent Proteins ◽  
Dimethyl Ester ◽  
Bile Pigments ◽  
Enhanced Fluorescence ◽  
Red Fluorescent Proteins

Biliverdin and its dimethyl ester derivatives are bile pigments with very low fluorescence quantum yield in solution, but naturally serve as chromophores in far-red fluorescent proteins with three orders of magnitude enhanced fluorescence quantum efficiency.

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.

THE EFFECT OF DIMETHYLSULFOXIDE ON THE FLUORESCENCE PROPERTIES OF SOME 4-HYDROXYQUINOLINES

2021 ◽  
Vol 55 (2 (255)) ◽  
pp. 112-117
Author(s):  
Karine R. Grigoryan ◽  
Hasmik A. Shilajyan ◽  
Iskuhi L. Aleksanyan ◽  
Zara L. Grigoryan ◽  
Lilit P. Hambardzumyan
Keyword(s):  
Charge Transfer ◽  
Quantum Yield ◽  
Aqueous Solutions ◽  
Electron Density ◽  
Aromatic Ring ◽  
Fluorescence Quantum Yield ◽  
Tautomeric Equilibrium ◽  
Fluorescence Properties ◽  
Fluorescence Efficiency ◽  
Dmso Concentration

Fluorescence properties of 4-hydroxy-2-methylquinoline (1) and 2-(5-mercapto-1,3,4-oxadiazol-2-yl)-6-methylquinoline-4-ol (2) were studied in dimethylsulfoxide (DMSO) aqueous solutions. The fluorescence properties of 1 and 2 exhibit substantial dependence on the DMSO concentration. The fluorescence quantum yield $(\Phi_f)$ of 1 decreases upon adding DMSO due to the shift in the keto-enol (E) tautomeric equilibrium toward E form․ On the contrary 2 demonstrates a tendency of increase of $\Phi_f$ upon adding DMSO due to intermolecular charge transfer from DMSO to the aromatic ring of quinoline, which increases the electron density on the ring and hence the fluorescence efficiency.

scholarly journals Synthesis of carbon nitride oligomer as a precursor of melon with improved fluorescence quantum yield

2021 ◽  
Vol 2 (18) ◽  
pp. 6083-6093
Author(s):  
Yuto Miyake ◽  
Goichiro Seo ◽  
Kotaro Matsuhashi ◽  
Noriyuki Takada ◽  
Kaname Kanai
Keyword(s):  
Optical Properties ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Carbon Nitride

Melem tetramer, the newly synthesized carbon nitride compound is composed of oligomers with four melem units, is stable in air, and has improved optical properties compared to melon.

Enhanced fluorescence of phthalimide compounds induced by the incorporation of electron-donating alicyclic amino groups

2018 ◽  
Vol 20 (23) ◽  
pp. 16033-16044 ◽  
Author(s):  
Ryoji Orita ◽  
Marius Franckevičius ◽  
Aurimas Vyšniauskas ◽  
Vidmantas Gulbinas ◽  
Haruki Sugiyama ◽  
...  
Keyword(s):  
Fluorescence Properties ◽  
Amino Groups ◽  
Enhanced Fluorescence ◽  
Significant Difference ◽  
Phthalimide Compounds

A significant difference in fluorescence properties between 3- and 4-substituted phthalimides demonstrates the formation of excited TICT and planar ICT states, respectively.

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