Frontispiece: Rigidly Tethered Bis-phosphoric Acids: Generation of Tunable Chiral Fluorescent Frameworks and Unexpected Selectivity for the Detection of Ferric Ions

2017 ◽  
Vol 23 (42) ◽  
Author(s):  
Frescilia Octa-Smolin ◽  
Raja Mitra ◽  
Maike Thiele ◽  
Constantin G. Daniliuc ◽  
Linda Stegemann ◽  
...  
Keyword(s):  
Ferric Ions ◽  
Phosphoric Acids

Rigidly Tethered Bis-phosphoric Acids: Generation of Tunable Chiral Fluorescent Frameworks and Unexpected Selectivity for the Detection of Ferric Ions

2017 ◽  
Vol 23 (42) ◽  
pp. 10058-10067 ◽  
Author(s):  
Frescilia Octa-Smolin ◽  
Raja Mitra ◽  
Maike Thiele ◽  
Constantin G. Daniliuc ◽  
Linda Stegemann ◽  
...  
Keyword(s):  
Ferric Ions ◽  
Phosphoric Acids

Photocatalytic Effect of Fe(III) on Oxidation of Two-Carbon Substrates Related to Natural Waters

1994 ◽  
Vol 59 (5) ◽  
pp. 1066-1076 ◽  
Author(s):  
Šárka Klementová ◽  
Dana M. Wagnerová
Keyword(s):  
Mathematical Model ◽  
Natural Waters ◽  
Substrate Oxidation ◽  
Quantum Yields ◽  
Ferric Ions ◽  
Photochemical Reduction ◽  
Photocatalytic Effect ◽  
Carbon Substrates ◽  
Glyoxalic Acid ◽  
The Common

The influence of ferric ions on photoinitiated reaction of dioxygen with two carbon organic acids, aldehydes and alcohols related to natural waters was demonstrated. Photocatalytic effect of ferric ions, i.e. photochemical reduction of Fe(III) as the catalyst generating step, has been found to be the common principal of these reactions. The overall quantum yields of the reactions are in the range from 0.3 to 1.2. A mathematical model designed for the mechanism of cyclic generation of catalyst in the singlet substrate oxidation by O2 was applied to the system glyoxalic acid + Fe(III); a fair agreement between the simulated and experimental kinetic curves was obtained. The experimental rate constant is 4.4 .10-4 s -1.

Adsorption of Vapours of Some Organic Compounds on Surface of Iron-Substituted Layered Vanadyl Phosphate

2000 ◽  
Vol 65 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Pavel Hradil ◽  
Jiří Votinský ◽  
Karel Komárek ◽  
Vítězslav Zima ◽  
Jaroslava Kalousová ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Organic Molecules ◽  
Ferric Ions ◽  
Vanadyl Phosphate ◽  
Enthalpy Of Adsorption ◽  
Adsorbent Surface ◽  
Specific Retention Volumes ◽  
Specific Retention ◽  
Retention Volumes ◽  
Chromatographic Measurement

Gas chromatographic measurement of specific retention volumes of vapours of selected groups of organic compounds has been used to determine differential molar enthalpy of adsorption of their molecules on the surface of layered vanadyl phosphate substituted with ferric ions having the composition of [Fe(H2O)]0.20(VO)0.80PO4. Various types of bonds of the molecules to the surface of the layered adsorbent including their probable orientation with respect to the layers have been discussed. It was observed a dependence of the specific peak elution volume and shape of chromatographic peak on the sample size in the cases of those compounds whose molecules are chemically bound to the adsorbent surface. A connection is pointed out between the adsorption strength of the organic molecules on the layered adsorbent and the tendency of the system to undergo intercalation reaction.

scholarly journals Dynamic Nanohybrid-Polysaccharide Hydrogels for Soft Wearable Strain Sensing

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3574
Author(s):  
Pejman Heidarian ◽  
Hossein Yousefi ◽  
Akif Kaynak ◽  
Mariana Paulino ◽  
Saleh Gharaie ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Strain Sensors ◽  
Self Healing ◽  
Nano Materials ◽  
Strain Sensing ◽  
Ferric Ions ◽  
Research Activity ◽  
Adhesion Properties ◽  
High Mechanical Strength ◽  
The Moment

Electroconductive hydrogels with stimuli-free self-healing and self-recovery (SELF) properties and high mechanical strength for wearable strain sensors is an area of intensive research activity at the moment. Most electroconductive hydrogels, however, consist of static bonds for mechanical strength and dynamic bonds for SELF performance, presenting a challenge to improve both properties into one single hydrogel. An alternative strategy to successfully incorporate both properties into one system is via the use of stiff or rigid, yet dynamic nano-materials. In this work, a nano-hybrid modifier derived from nano-chitin coated with ferric ions and tannic acid (TA/Fe@ChNFs) is blended into a starch/polyvinyl alcohol/polyacrylic acid (St/PVA/PAA) hydrogel. It is hypothesized that the TA/Fe@ChNFs nanohybrid imparts both mechanical strength and stimuli-free SELF properties to the hydrogel via dynamic catecholato-metal coordination bonds. Additionally, the catechol groups of TA provide mussel-inspired adhesion properties to the hydrogel. Due to its electroconductivity, toughness, stimuli-free SELF properties, and self-adhesiveness, a prototype soft wearable strain sensor is created using this hydrogel and subsequently tested.

scholarly journals Dual-emission ratio fluorescence for selective and sensitive detection of ferric ions and ascorbic acid based on one-pot synthesis of glutathione protected gold nanoclusters

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17283-17290
Author(s):  
Shuai Zhang ◽  
Cong Zhang ◽  
Xiaodong Shao ◽  
Rentian Guan ◽  
Yingying Hu ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Gold Nanoclusters ◽  
Sensitive Detection ◽  
Dual Fluorescence ◽  
Ferric Ions ◽  
Fluorometric Method ◽  
One Pot ◽  
Dual Emission ◽  
One Pot Synthesis

A fluorometric method was proposed for the determination of Fe3+ and ascorbic acid (AA) based on blue and red dual fluorescence emissions of glutathione (GSH) stabilized-gold nanoclusters (AuNCs).

Facile access to benzofuran-fused tetrahydropyridines via catalytic asymmetric [4 + 2] cycloaddition of aurone-derived 1-azadienes with 3-vinylindoles

2021 ◽  
Author(s):  
Wai Lean Koay ◽  
Guang-Jian Mei ◽  
Yixin Lu
Keyword(s):  
Cycloaddition Reaction ◽  
Wide Range ◽  
Catalytic Asymmetric ◽  
Phosphoric Acids

A highly enantioselective [4 + 2] cycloaddition reaction of aurone-derived 1-azadienes with 3-vinylindoles has been developed. In the presence of chiral phosphoric acids, a wide range of benzofuran-fused tetrahydropyridines with...

scholarly journals Tagetes erecta as an organic precursor: synthesis of highly fluorescent CQDs for the micromolar tracing of ferric ions in human blood serum

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19924-19934
Author(s):  
Pinky Sagar ◽  
Gopal Krishna Gupta ◽  
Monika Srivastava ◽  
Amit Srivastava ◽  
S. K. Srivastava
Keyword(s):  
Blood Serum ◽  
Hydrothermal Method ◽  
Human Blood ◽  
Human Blood Serum ◽  
Tagetes Erecta ◽  
Ferric Ions ◽  
Organic Precursor ◽  
Precursor Synthesis

TE-CQDs synthesized via the hydrothermal method for the detection of Fe3+ in HBS.

Involvement of 101F6, a Homologue of Cytochrome b561, in the Reduction of Ferric Ions

2007 ◽  
Vol 142 (6) ◽  
pp. 699-705 ◽  
Author(s):  
A. Mizutani ◽  
R. Sanuki ◽  
K. Kakimoto ◽  
S. Kojo ◽  
S. Taketani
Keyword(s):  
Ferric Ions ◽  
Cytochrome B561
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