Ag-Conjugated graphene quantum dots with blue light-enhanced singlet oxygen generation for ternary-mode highly-efficient antimicrobial therapy

2020 ◽  
Vol 8 (7) ◽  
pp. 1371-1382 ◽  
Author(s):  
Yunjian Yu ◽  
Lin Mei ◽  
Yanmei Shi ◽  
Xinge Zhang ◽  
Kesong Cheng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Singlet Oxygen ◽  
Blue Light ◽  
Silver Nanoparticle ◽  
Broad Spectrum ◽  
Antimicrobial Therapy ◽  
Graphene Quantum Dots ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Highly Efficient

A broad-spectrum antibacterial system was produced in which silver nanoparticle-conjugated graphene quantum dots were utilised as a blue light-enhanced nanotherapeutic for efficient ternary-mode antimicrobial therapy.

Fluorine-containing graphene quantum dots with a high singlet oxygen generation applied for photodynamic therapy

2020 ◽  
Vol 8 (13) ◽  
pp. 2598-2606 ◽  
Author(s):  
Zhenzhen Li ◽  
Dong Wang ◽  
Mingsheng Xu ◽  
Jingmin Wang ◽  
Xiaolong Hu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Hepg2 Cells ◽  
Graphene Quantum Dots ◽  
Light Irradiation ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

Compared with graphene quantum dots (GQDs), fluorine-containing GQDs (F-GQDs) present higher 1O2 generation under light irradiation and thus cause obvious toxicity to HepG2 cells. F-GQDs can be used as a photosensitizer for photodynamic therapy.

Effective Singlet Oxygen Generation in Silica‐Coated CsPbBr 3 Quantum Dots through Energy Transfer for Photocatalysis

ChemSusChem ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 682-687 ◽  
Author(s):  
Kailun Gu ◽  
Yu Wang ◽  
Jianhua Shen ◽  
Jingrun Zhu ◽  
Yihua Zhu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Singlet Oxygen ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

scholarly journals Highly efficient singlet oxygen generation, two-photon photodynamic therapy and melanoma ablation by rationally designed mitochondria-specific near-infrared AIEgens

2020 ◽  
Vol 11 (9) ◽  
pp. 2494-2503 ◽  
Author(s):  
Zheng Zheng ◽  
Haixiang Liu ◽  
Shaodong Zhai ◽  
Haoke Zhang ◽  
Guogang Shan ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Molecular Engineering ◽  
Photon Absorption ◽  
Oxygen Generation ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Singlet Oxygen Generation ◽  
Highly Efficient

Mitochondria-targeted photosensitizers with highly efficient singlet oxygen generation, bright near-infrared AIE and good two-photon absorption are obtained through ingenious molecular engineering for cancer cell-selective photodynamic therapy.

Evaluation of metallophthalocyanine functionalized photocatalytic asymmetric polymer membranes for pollution control and antimicrobial activity

2021 ◽  
Author(s):  
◽  
Donovan Musizvinoda Chidyamurimi Mafukidze
Keyword(s):  
Water Treatment ◽  
Singlet Oxygen ◽  
Organic Pollutant ◽  
Graphene Quantum Dots ◽  
Polymer Membranes ◽  
Treatment Technology ◽  
Covalent Linkage ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Porphyrin Phthalocyanine

The conceptualisation of photosensitizing water treatment polymer membranes using phthalocyanine based photosensitizers is reported in this thesis. The key to successful preparation of stable photoactive polymer membranes was established as the covalent anchorage of the photosensitizer to a polymer, which was proven by singlet oxygen generation by the membranes without photosensitizer deterioration. Despite this limitation, the covalent linkage-incapable unsubstituted zinc (II) phthalocyanine (complex 2) was applied as a nanoconjugate of graphene quantum dots (2π(GQDs)). 2π(GQDs) was formed through π-π stacking, and was then covalently anchored, as a proof of concept. This concept was also applied to 2-(4-carboxyphenoxy) phthalocyaninato zinc (II) (complex 3) which is capable of covalent linkage but proved to deteriorate the efficiency of singlet oxygen formation with comparison to the covalent conjugates. Singlet oxygen generation by functionalized polymer membranes rendered them photocatalytic in the degradation of organic pollutants and microorganisms in water. Organic pollutant degradation capability was exemplified by 2π(GQDs) and a porphyrin-phthalocyanine heterodyad (complex 10) functionalized membranes (2π(GQDs)-memb and 10-memb respectively), where a MPc loading of approximately 0.139 μmol MPc/g of membrane was able to achieve a 4-chlorophenol degradation rate of 3.77 × 10−6 mol L−1 min−1 in a second order reaction with an initial 4-chlorophenol concentration of 3.24 × 10−4 mol L−1 for 2π(GQDs)-memb as an example. Antibacterial studies against S.aureus using a quaternized MPc and conjugates of silver triangular nanoprisms with zinc (II) and indium (III) MPcs showed note-worthy improvements in photodynamic antimicrobial chemotherapy (PACT) activity in comparison to the unquaternized MPc precursor, and the free zinc and indium MPcs respectively. Functionalization of polymer membranes with these higher activity photosensitizers translated to the formation of potentially superior biological fouling resistant membranes. The use of porphyrin-phthalocyanine polynuclei arrays (complex 10) in polymer membrane functionalization resulted in the use of a wider wavelength range (white light). The findings from this work as a whole, thus presents the potential applicability of phthalocyanine functionalized polymer membranes in water treatment technology.

PET-based bisBODIPY photosensitizers for highly efficient excited triplet state and singlet oxygen generation: tuning photosensitizing ability by dihedral angles

2017 ◽  
Vol 19 (36) ◽  
pp. 24792-24804 ◽  
Author(s):  
Xian-Fu Zhang ◽  
Xudong Yang ◽  
Baomin Xu
Keyword(s):  
Triplet State ◽  
Singlet Oxygen ◽  
Excited Triplet State ◽  
Dihedral Angles ◽  
Excited Triplet ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Highly Efficient

PET-based excited triplet state and singlet oxygen photosensitizers: covalent BODIPY dimers.

Phytofluene as a Highly Efficient UVA Photosensitizer of Singlet Oxygen Generation

2020 ◽  
Vol 85 (7) ◽  
pp. 773-780
Author(s):  
A. A. Ashikhmin ◽  
A. S. Benditkis ◽  
A. A. Moskalenko ◽  
A. A. Krasnovsky
Keyword(s):  
Singlet Oxygen ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Highly Efficient
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