Use of the fluorogenic Al3+–quinolinyl-azo-naphtholato complex for the determination of F− in aqueous medium by visible light excitation and application in ground water fluoride analysis

2019 ◽  
Vol 11 (35) ◽  
pp. 4440-4449
Author(s):  
Chandana Sen ◽  
Sunanda Dey ◽  
Chiranjit Patra ◽  
Debashis Mallick ◽  
Chittaranjan Sinha
Keyword(s):  
Visible Light ◽  
Ground Water ◽  
Aqueous Medium ◽  
Turn On ◽  
Light Excitation ◽  
Water Fluoride

Quinolinyl-azo-naphthol (HL) is a selective turn-on chemosensor for Al3+ in the presence of other ions and the excitation at visible light (537 nm) shows a 750 fold enhancement of emission at 612 nm.

Design of Ratiometric Emission Probe with Visible Light Excitation for Determination of Ca2+in Living Cells

2014 ◽  
Vol 86 (16) ◽  
pp. 8025-8030 ◽  
Author(s):  
Qiaoling Liu ◽  
Huizhi Du ◽  
Xiaoze Ren ◽  
Wei Bian ◽  
Li Fan ◽  
...  
Keyword(s):  
Visible Light ◽  
Living Cells ◽  
Light Excitation

Turn-on fluorescent probe with visible light excitation for labeling of hexahistidine tagged protein

2009 ◽  
Vol 19 (8) ◽  
pp. 2285-2288 ◽  
Author(s):  
Mie Kamoto ◽  
Naoki Umezawa ◽  
Nobuki Kato ◽  
Tsunehiko Higuchi
Keyword(s):  
Visible Light ◽  
Fluorescent Probe ◽  
Turn On ◽  
Light Excitation

Photoassisted Production of O2-• and H2 in Aqueous Medium Stimulated by Polythiophene in ZSM-5 Zeolite Channels

1999 ◽  
Vol 64 (1) ◽  
pp. 149-156 ◽  
Author(s):  
Gabriel Čík ◽  
František Šeršeň ◽  
Alena Bumbálová
Keyword(s):  
Reactive Oxygen Species ◽  
Ion Exchange ◽  
Visible Light ◽  
Aqueous Medium ◽  
Exchange Reaction ◽  
Epr Spectroscopy ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Water Reduction ◽  
Ion Exchange Reaction

The formation of reactive oxygen species due to irradiation by a visible light of the polythiophene deposited in ZSM-5 zeolite channels in aqueous medium has been studied. Polymerization of thiophene was carried out in zeolite channels after the ion-exchange reaction of Na+ for Fe3+. By means of EPR spectroscopy, the temporarily generated 1O2 in irradiated aqueous medium was proved. The formation of O2-• was confirmed by the reduction of Fe3+-cytochrome c. Irradiation led to the water reduction to hydrogen.

scholarly journals Elemental composition control of gold-titania nanocomposites by site-specific mineralization using artificial peptides and DNA

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Makoto Ozaki ◽  
Takahito Imai ◽  
Takaaki Tsuruoka ◽  
Shungo Sakashita ◽  
Kin-ya Tomizaki ◽  
...  
Keyword(s):  
Visible Light ◽  
Elemental Composition ◽  
Inorganic Compounds ◽  
Medical Science ◽  
Induction Effect ◽  
Site Specific ◽  
Composition Control ◽  
Light Excitation ◽  
Titania Photocatalyst ◽  
Scale Control

AbstractBiomineralization, the precipitation of various inorganic compounds in biological systems, can be regulated in terms of the size, morphology, and crystal structure of these compounds by biomolecules such as proteins and peptides. However, it is difficult to construct complex inorganic nanostructures because they precipitate randomly in solution. Here, we report that the elemental composition of inorganic nanocomposites can be controlled by site-specific mineralization by changing the number of two inorganic-precipitating peptides bound to DNA. With a focus on gold and titania, we constructed a gold-titania photocatalyst that responds to visible light excitation. Both microscale and macroscale observations revealed that the elemental composition of this gold-titania nanocomposite can be controlled in several ten nm by changing the DNA length and the number of peptide binding sites on the DNA. Furthermore, photocatalytic activity and cell death induction effect under visible light (>450 nm) irradiation of the manufactured gold-titania nanocomposite was higher than that of commercial gold-titania and titania. Thus, we have succeeded in forming titania precipitates on a DNA terminus and gold precipitates site-specifically on double-stranded DNA as intended. Such nanometer-scale control of biomineralization represent a powerful and efficient tool for use in nanotechnology, electronics, ecology, medical science, and biotechnology.

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