Phthalocyanine functionalized poly(glycidyl methacrylate) nano-assemblies for photodynamic inactivation of bacteria

2019 ◽  
Vol 7 (5) ◽  
pp. 1905-1918 ◽  
Author(s):  
Wei Tong ◽  
Yanhua Xiong ◽  
Shun Duan ◽  
Xiaokang Ding ◽  
Fu-Jian Xu
Keyword(s):  
Reactive Oxygen Species ◽  
Aqueous Solution ◽  
Glycidyl Methacrylate ◽  
Bacterial Infections ◽  
Reactive Oxygen ◽  
Photodynamic Inactivation ◽  
Oxygen Species ◽  
Self Assembled ◽  
Inactivation Of Bacteria

Self-assembled PGED-Pc nanoparticles are able to inactivate bacteria via the generation of reactive oxygen species in aqueous solution, while a facile immobilization strategy sheds light on the engineering of self-sterilizing surfaces to combat bacterial infections.

scholarly journals Generation of reactive oxygen species by promoting the Cu(II)/Cu(I) redox cycle with reducing agents in aerobic aqueous solution

2018 ◽  
Vol 78 (6) ◽  
pp. 1390-1399 ◽  
Author(s):  
Wenshu Li ◽  
Peng Zhou ◽  
Jing Zhang ◽  
Yongli Zhang ◽  
Gucheng Zhang ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Aqueous Solution ◽  
Superoxide Radical ◽  
Reactive Oxygen ◽  
Reducing Agents ◽  
Oxygen Species ◽  
Redox Cycle ◽  
Copper Species ◽  
Chain Reactions ◽  
H2o2 Generation

Abstract This study investigated the generation of reactive oxygen species (ROS) (O2−•, H2O2, and HO•) by promoting the Cu(II)/Cu(I) redox cycle with certain reducing agents (RAs) in aerobic aqueous solution, and benzoic acid (BA) was employed as indicator for the hydroxyl radical (HO•). Hydroxylamine (HA) can reduce Cu(II) to Cu(I) to induce chain reactions of copper species resulting in the generation of the superoxide radical (O2−•) and hydrogen peroxide (H2O2), and the intermediate Cu(I) can further activate H2O2 via a Fenton-like reaction to produce HO•, creating the remarkable BA degradation. O2 is indispensable, and unprotonated HA is the motive power in the O2/Cu/HA system. Moreover, pH is a crucial factor of the O2/Cu/HA system due to the protonated HA not being able to reduce Cu(II) into Cu(I). The oxidation of HA can be effectively induced by trace amounts of Cu(II), and both a higher HA dosage and a higher Cu(II) dosage can enhance H2O2 generation and BA degradation. In addition, some other RAs that can reduce Cu(II) into Cu(I) could replace HA in the O2/Cu/HA system to induce the generation of these ROS in aerobic aqueous solution.

Colorimetric and Fluorescent Probe for Hypochlorite with High Selectivity

2013 ◽  
Vol 295-298 ◽  
pp. 475-478 ◽  
Author(s):  
Zhi Xiang Han ◽  
Ming Hui Du ◽  
Guo Xi Liang ◽  
Xiang Yang Wu
Keyword(s):  
Reactive Oxygen Species ◽  
Aqueous Solution ◽  
Detection Limit ◽  
Fluorescent Probe ◽  
Rhodamine B ◽  
High Selectivity ◽  
Reactive Oxygen ◽  
Living Cells ◽  
Oxygen Species ◽  
Turn On

Rhodamine B thiohydrazide (RBS) was firstly employed as turn-on fluorescent probe for hypochlorite in aqueous solution and living cells. It exhibits a stable response to hypochlorite from 1.0×10-6to 1.0×10-5M with a detection limit of 3.3×10-7M. The response of this probe to hypochlorite is fast and highly selective compared with other reactive oxygen species (such as.OH,1O2, H2O2) and other common anions (such as X-, ClO2-, ClO4-, NO3-, NO2-, OH-, Ac-, CO32-, SO42-).

Toxic Reactive Oxygen Species Enhanced Synergistic Combination Therapy by Self-Assembled Metal-Phenolic Network Nanoparticles

2018 ◽  
Vol 30 (8) ◽  
pp. 1704877 ◽  
Author(s):  
Yunlu Dai ◽  
Zhen Yang ◽  
Siyuan Cheng ◽  
Zhongliang Wang ◽  
Ruili Zhang ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Combination Therapy ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Synergistic Combination ◽  
Self Assembled

Role of in situ electrogenerated reactive oxygen species towards degradation of organic dye in aqueous solution

2020 ◽  
Vol 344 ◽  
pp. 136146 ◽  
Author(s):  
Md. Saddam Hossain ◽  
M. Yousuf A. Mollah ◽  
Md. Abu Bin Hasan Susan ◽  
Md. Mominul Islam
Keyword(s):  
Reactive Oxygen Species ◽  
Aqueous Solution ◽  
Reactive Oxygen ◽  
Organic Dye ◽  
Oxygen Species

Photosensitization mechanism of Cu(ii) porphyrins

2017 ◽  
Vol 19 (31) ◽  
pp. 20533-20540 ◽  
Author(s):  
Jon Uranga ◽  
Jon M. Matxain ◽  
Xabier Lopez ◽  
Jesus M. Ugalde ◽  
David Casanova
Keyword(s):  
Reactive Oxygen Species ◽  
Aqueous Solution ◽  
Reactive Oxygen ◽  
Oxygen Species

This work presents the mechanism of the photoinduced generation of reactive oxygen species (ROS) by paramagnetic copper porphyrins in aqueous solution.

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