Investigation into Enhanced Catalytic Performance for Epoxidation of Styrene over LaSrCoxFe2–xO6 Double Perovskites: The Role of Singlet Oxygen Species Promoted by the Photothermal Effect

ACS Catalysis ◽  
2021 ◽  
pp. 11855-11866
Author(s):  
Fengfeng Li ◽  
Jun Tang ◽  
Qingping Ke ◽  
Yun Guo ◽  
Minh Ngoc Ha ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Catalytic Performance ◽  
Photothermal Effect ◽  
Double Perovskites ◽  
Oxygen Species ◽  
Singlet Oxygen Species

Synthesis of pH-Responsive Glycopolymer with End Group Zinc(II) Phthalocyanines as Potential Photosensitizer

2020 ◽  
Vol 996 ◽  
pp. 82-87
Author(s):  
Shu Guo Dong ◽  
Gui Hua Cui ◽  
Qian Duan
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Raft Polymerization ◽  
Photophysical Properties ◽  
Water Soluble ◽  
Quantum Yields ◽  
Oxygen Species ◽  
Ph Responsive ◽  
Reversible Addition ◽  
Singlet Oxygen Species

A novel end-functionalized glycopolymer poly (3-O-methacryloyl-D-glucofuranose) -b-poly (2-Diethylaminoethyl Methacrylate) (PMAGlc-b-PDEA-ZnTAPc) with zinc (II) teraamaninophthalocyanine was synthesized. First, a pH-responsive copolymer PMAIpG-b-PDEA was synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization. Then PMAIpG-b-PDEA reacted with ZnTAPc and deprotected to form a water-soluble and pH-responsive photosensitizer. The structure of the PMAGlc-b-PDEA-ZnTAPc was characterized by 1H NMR and GPC. The photophysical properties were evaluated by UV-Vis and fluorescence spectra. The PMAGlc-b-PDEA-ZnTAPc can generate singlet oxygen species with good singlet oxygen quantum yields (Φ△=0.38), which is believed to be the major cytotoxic reactive oxygen species (ROS) for photodynamic therapy. The ZnPc functionalized glycopolymer will be used as a potential photosensitizer in the fields of photodynamic therapy.

First Evidence of Singlet Oxygen Species Mechanism in Silicate Clay for Antimicrobial Behavior

2013 ◽  
Vol 1569 ◽  
pp. 67-72
Author(s):  
Jiun-Chiou Wei ◽  
Yi-Ting Wang ◽  
Jiang-Jen Lin
Keyword(s):  
Singlet Oxygen ◽  
Methicillin Resistance ◽  
Antimicrobial Property ◽  
Multilayered Structure ◽  
Chemical Mechanism ◽  
Oxygen Species ◽  
Property A ◽  
E Coli ◽  
Resistant Species ◽  
Singlet Oxygen Species

ABSTRACTThin silicate nanoplatelets, derived from the exfoliation of natural Sodium montmorillonite (Na+-MMT) clays, show an unexpected antimicrobial property. A physical trapping mechanism has been proposed because the clay nanoplatelets can indiscriminately inhibit the growth of a broad spectrum of bacteria, including drug-resistant species such as methicillin-resistance S. aureus (MRSA) and silver ion-resistant E. coli. The ability to generate singlet oxygen species was first observed for the clay platelets that showed a high-aspect-ratio geometric shape and the presence of surface ionic charges. By comparison, the pristine clay with a multilayered structure failed to generate any singlet oxygen species. The ability to emit singlet oxygen species provides direct evidence for the antimicrobial ability of clay through a non-chemical mechanism, which opens the potential for medical use.

Selective photooxidation of sulfides mediated by singlet oxygen using visible-light-responsive coordination polymers

2018 ◽  
Vol 54 (92) ◽  
pp. 13002-13005 ◽  
Author(s):  
Xiao Liang ◽  
Zhifen Guo ◽  
Hongxia Wei ◽  
Xin Liu ◽  
Hui Lv ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Coordination Polymers ◽  
Oxygen Species ◽  
Singlet Oxygen Species

A novel visible-light-responsive coordination polymer for highly selective photooxidation of sulfides to produce sulfoxides through singlet oxygen species.

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