Mechanism of Singlet Oxygen Generation in Visible-Light-Induced Photocatalysis of Gold-Nanoparticle-Deposited Titanium Dioxide

2014 ◽  
Vol 118 (29) ◽  
pp. 15656-15663 ◽  
Author(s):  
Hironobu Saito ◽  
Yoshio Nosaka
Keyword(s):  
Titanium Dioxide ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Gold Nanoparticle ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

scholarly journals Singlet oxygen generation properties of an inclusion complex of cyclic free-base porphyrin dimer and fullerene C60

RSC Advances ◽  
2017 ◽  
Vol 7 (30) ◽  
pp. 18690-18695 ◽  
Author(s):  
Yousuke Ooyama ◽  
Toshiaki Enoki ◽  
Joji Ohshita ◽  
Takuya Kamimura ◽  
Shuwa Ozako ◽  
...  
Keyword(s):  
Inclusion Complex ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Visible Light Irradiation ◽  
Fullerene C60 ◽  
Light Irradiation ◽  
Free Base ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Porphyrin Dimer

We demonstrate that a cyclic free-base porphyrin dimer and its inclusion complex with fullerene C60 possess the ability to generate singlet oxygen (1O2) under visible light irradiation.

Singlet oxygen generation in the presence of titanium dioxide materials used as sunscreens in suntan lotions

2010 ◽  
Vol 213 (2-3) ◽  
pp. 158-163 ◽  
Author(s):  
Marta Buchalska ◽  
Gabriela Kras ◽  
Marcin Oszajca ◽  
Wiesław Łasocha ◽  
Wojciech Macyk
Keyword(s):  
Titanium Dioxide ◽  
Singlet Oxygen ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Materials Used

scholarly journals C60@lysozyme: a new photosensitizing agent for photodynamic therapy

2017 ◽  
Vol 5 (32) ◽  
pp. 6608-6615 ◽  
Author(s):  
A. Soldà ◽  
A. Cantelli ◽  
M. Di Giosia ◽  
M. Montalti ◽  
F. Zerbetto ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Photosensitizing Agent

C60@lysozyme showed significant visible light-induced singlet oxygen generation in a physiological environment, indicating the potential of this hybrid as an agent for photodynamic therapy.

Acid–base controllable singlet oxygen generation in supramolecular porphyrin–gold nanoparticle composites tethered by rotaxane linkers

2020 ◽  
Vol 24 (01n03) ◽  
pp. 171-180
Author(s):  
Akira Shinohara ◽  
Chengjun Pan ◽  
Lei Wang ◽  
Hideyuki Shinmori
Keyword(s):  
Singlet Oxygen ◽  
Gold Nanoparticle ◽  
Energy Transfer Efficiency ◽  
Quantum Yields ◽  
Free Base ◽  
Text Generation ◽  
Acid Base ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Nanoparticle Composites

Mechanically-interlocked photosensitizer–quencher systems based on free-base tetraphenylporphyrin (H2TPP)–gold nanoparticle (AuNP) composites has been designed and synthesized by utilizing a rotaxane architecture comprised of secondary ammonium and crown ether subunit. The H2TPP-substituted 24-crown-8 was able to shuttle along the alkanethiolate axle, triggered by deprotonation/protonation at the ammonium station, altering the H2TPP–AuNP distance and the photoexcitation energy transfer efficiency. Upon switching, quantum yields for photosensitized singlet oxygen (1O[Formula: see text] generation and fluorescence after deprotonation were quenched by 46% and 42%, respectively. External environment-responsive 1O2 generation based on such a protonation/deprotonation-driven molecular switch is potentially advantageous for a variety of applications including photodynamic therapies.

Visible Light Promotes Decyanation Esterification Reaction of β-Ketonitriles with Dioxygen and Alcohols to α-Ketoesters

Synlett ◽  
2018 ◽  
Vol 29 (08) ◽  
pp. 1065-1070 ◽  
Author(s):  
Cheng Guo ◽  
Chen Xu ◽  
Nan-Nan Zhang ◽  
Xiao-ji Li ◽  
Yan-qin Ge ◽  
...  
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Bond Cleavage ◽  
Esterification Reaction ◽  
Bond Functionalization ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Catalyst Free ◽  
Plausible Mechanism

A green and mild method has been developed for the conversion of β-ketonitriles into α-ketoesters under catalyst-free conditions. A plausible mechanism is that visible light promotes singlet oxygen generation to form the products through oxidative C–H bond functionalization and C–C σ-bond cleavage.

Heterogeneous singlet oxygen generation: in-operando visible light EPR spectroscopy

2019 ◽  
Author(s):  
Carlos Mendoza ◽  
Anthony Désert ◽  
Lhoussain Khrouz ◽  
Carlos A. Páez ◽  
Stéphane Parola ◽  
...  
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Epr Spectroscopy ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
In Operando

Conjugated copolymer–photosensitizer molecular hybrids with broadband visible light absorption for efficient light-harvesting and enhanced singlet oxygen generation

2015 ◽  
Vol 3 (5) ◽  
pp. 973-976 ◽  
Author(s):  
Rongkun He ◽  
Ming Hu ◽  
Ting Xu ◽  
Chunxiang Li ◽  
Chuanliu Wu ◽  
...  
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Light Absorption ◽  
Light Harvesting ◽  
Visible Absorption ◽  
Visible Light Absorption ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Molecular Hybrids ◽  
Conjugated Copolymer

We have developed conjugated copolymer–photosensitizer molecular hybrids (PFBDBP–IPBP) with a strong, broad (from <400 nm to ∼700 nm) and continuous visible absorption.

Singlet oxygen generation under NIR light and visible light excitations of photosensitizers on upconversion nanoparticle surface

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 67892-67895 ◽  
Author(s):  
Padmanabh Joshi ◽  
Tevhide Ozkaya Ahmadov ◽  
Peng Wang ◽  
Peng Zhang
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Nir Light ◽  
Nanoparticle Surface

Effects of beef tissue on singlet oxygen generation under both near-infrared and visible light excitations are investigated and compared.

Sign in / Sign up

Export Citation Format

Share Document