scholarly journals Platinum(ii)–porphyrin as a sensitizer for visible-light driven water oxidation in neutral phosphate buffer

2015 ◽  
Vol 8 (3) ◽  
pp. 975-982 ◽  
Author(s):  
Hung-Cheng Chen ◽  
Dennis G. H. Hetterscheid ◽  
René M. Williams ◽  
Jarl Ivar van der Vlugt ◽  
Joost N. H. Reek ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
High Potential ◽  
Water Soluble ◽  
Buffer Solution ◽  
Visible Light Driven

A water-soluble Pt(ii)–porphyrin with a high potential for one-electron oxidation (∼1.42 V vs. NHE) proves very suitable for visible-light driven water oxidation in neutral phosphate buffer solution in combination with a variety of WOCs.

scholarly journals Halogenated earth abundant metalloporphyrins as photostable sensitizers for visible-light-driven water oxidation in a neutral phosphate buffer solution

2016 ◽  
Vol 18 (22) ◽  
pp. 15191-15198 ◽  
Author(s):  
Hung-Cheng Chen ◽  
Joost N. H. Reek ◽  
René M. Williams ◽  
Albert M. Brouwer
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Oxidation Catalysts ◽  
Buffer Solution ◽  
Earth Abundant ◽  
Visible Light Driven

Chlorinated porphyrins containing earth abundant Cu(ii) and Ni(ii) are powerful and photostable photosensitizers for water oxidation catalysts.

scholarly journals Tunneling in the Hydrogen-Transfer Reaction from a Vitamin E Analog to an Inclusion Complex of 2,2-Diphenyl-1-picrylhydrazyl Radical with β-Cyclodextrin in an Aqueous Buffer Solution at Ambient Temperature

Antioxidants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1966
Author(s):  
Ikuo Nakanishi ◽  
Yoshimi Shoji ◽  
Kei Ohkubo ◽  
Shunichi Fukuzumi
Keyword(s):  
Vitamin E ◽  
Phosphate Buffer ◽  
Hydrogen Transfer ◽  
Transfer Reaction ◽  
Phosphate Buffer Solution ◽  
Water Soluble ◽  
Quantum Mechanical ◽  
Buffer Solution ◽  
Quantum Mechanical Tunneling ◽  
Hydrogen Transfer Reaction

Recently, increasing attention has been paid to quantum mechanical behavior in biology. In this study, we investigated the involvement of quantum mechanical tunneling in the hydrogen-transfer reaction from Trolox, a water-soluble analog of vitamin E (α-tocopherol), to 2,2-diphenyl-1-picrylhydrazyl radical (DPPH•) in a phosphate buffer solution (0.05 M, pH 7.0). DPPH• was used as a reactivity model of reactive oxygen species and solubilized in water using β-cyclodextrin (β-CD). The second-order rate constants, kH and kD, in 0.05 M phosphate buffer solutions prepared with H2O (pH 7.0) and D2O (pD 7.0), respectively, were determined for the reaction between Trolox and DPPH•, using a stopped-flow technique at various temperatures (283–303 K). Large kinetic isotope effects (KIE, kH/kD) were observed for the hydrogen-transfer reaction from Trolox to the β-CD-solubilized DPPH• in the whole temperature range. The isotopic ratio of the Arrhenius prefactor (AH/AD = 0.003), as well as the isotopic difference in the activation energies (19 kJ mol−1), indicated that quantum mechanical tunneling plays a role in the reaction.

An aqueous, organic dye derivatized SnO2/TiO2 core/shell photoanode

2016 ◽  
Vol 4 (8) ◽  
pp. 2969-2975 ◽  
Author(s):  
Kyung-Ryang Wee ◽  
Benjamin D. Sherman ◽  
M. Kyle Brennaman ◽  
Matthew V. Sheridan ◽  
Animesh Nayak ◽  
...  
Keyword(s):  
Water Splitting ◽  
Phosphonic Acid ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Organic Dye ◽  
Photoelectrochemical Cell ◽  
Core Shell ◽  
Buffer Solution ◽  
Dye Sensitized ◽  
Visible Light Driven

Visible light driven water splitting in a dye-sensitized photoelectrochemical cell (DSPEC) based on a phosphonic acid-derivatized donor–π–acceptor (D–π–A) organic dye (P–A–π–D) is described with the dye anchored to an FTO|SnO2/TiO2 core/shell photoanode in a pH 7 phosphate buffer solution.

Highly efficient electrocatalytic hydrogen evolution from neutral aqueous solution by a water-soluble anionic cobalt(ii) porphyrin

2015 ◽  
Vol 51 (81) ◽  
pp. 15067-15070 ◽  
Author(s):  
Belete B. Beyene ◽  
Sandeep B. Mane ◽  
Chen-Hsiung Hung
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Evolution ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Water Soluble ◽  
Applied Potential ◽  
Buffer Solution ◽  
Faradaic Efficiency ◽  
Highly Efficient ◽  
Neutral Aqueous Solution

CoTPPS is an efficient electrocatalyst for H2 generation from neutral phosphate buffer solution. It features quantitative Faradaic efficiency with a TOF of ∼1.83 s−1 and a TON of 1.9 × 104 mol of H2 per mole of catalyst at an applied potential of −1.29 V (vs. SHE).

scholarly journals Au decorated BiVO4 inverse opal for efficient visible light driven water oxidation

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8751-8758
Author(s):  
Xiaonong Wang ◽  
Xiaoxia Li ◽  
Jingxiang Low
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Water Oxidation ◽  
Inverse Opal ◽  
Photocatalytic Water Splitting ◽  
Visible Light Driven

Photocatalytic water splitting provides an effective way to prepare hydrogen and oxygen.

Visible‐Light‐Driven Water Oxidation with a Polyoxometalate‐Complexed Hematite Core of 275 Iron Atoms

2019 ◽  
Vol 131 (20) ◽  
pp. 6656-6661 ◽  
Author(s):  
Biswarup Chakraborty ◽  
Gal Gan‐Or ◽  
Yan Duan ◽  
Manoj Raula ◽  
Ira A. Weinstock
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Visible Light Driven

Visible light-driven novel g-C3N4/NiFe-LDH composite photocatalyst with enhanced photocatalytic activity towards water oxidation and reduction reaction

2015 ◽  
Vol 3 (36) ◽  
pp. 18622-18635 ◽  
Author(s):  
Susanginee Nayak ◽  
Lagnamayee Mohapatra ◽  
Kulamani Parida
Keyword(s):  
Photocatalytic Activity ◽  
Composite Materials ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Reduction Reaction ◽  
Light Irradiation ◽  
Composite Photocatalyst ◽  
Visible Light Driven

Dispersion of exfoliated CN over the surface of exfoliated LDH composite materials, and its photocatalytic water splitting under visible-light irradiation.

Bioceramic Hydroxyapatite Granules for Purification of Biotechnological Products

2011 ◽  
Vol 284-286 ◽  
pp. 1764-1769 ◽  
Author(s):  
Vitalijs Lakevics ◽  
Janis Locs ◽  
Dagnija Loca ◽  
Valentina Stepanova ◽  
Liga Berzina-Cimdina ◽  
...  
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Phosphate Buffer ◽  
Bovine Serum ◽  
Phosphate Buffer Solution ◽  
Sorption Process ◽  
Buffer Solution ◽  
Ph Values ◽  
Bovine Serum Albumin Adsorption ◽  
Albumin Adsorption

Sorption experiments of bovine serum albumin (BSA) on hydroxyapatite (HAp) ceramic granules, prepared at three temperatures 900°C, 1000°C and 1150°C were performed at room temperature 18,6 °C and phosphate buffer, pH 5,83; 6.38 and 7,39. Thermal treatment contributed to the decrease of bovine serum albumin immobilization indicating that sorption process depended on HAp ceramics specific surface area and pH values of phosphate buffer solution. However, it was confirmed that granule size was also an important parameter for bovine serum albumin adsorption. As a result of these experiments, the most appropriate adsorption conditions and phosphate buffer pH values influence on to BSA sorption were analyzed.

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