scholarly journals Quantum Chemistry Based Arguments about Singlet Oxygen Formation Trends from Fluorescent Proteins

2016 ◽  
Vol 5 (2) ◽  
pp. 18-20
Author(s):  
Jae Woo Park ◽  
Young Min Rhee
Keyword(s):  
Quantum Chemistry ◽  
Singlet Oxygen ◽  
Fluorescent Proteins ◽  
Oxygen Formation ◽  
Singlet Oxygen Formation

Singlet Oxygen Formation and Scavenging in Cytochromeb6fComplex from Spinach

2012 ◽  
Vol 28 (10) ◽  
pp. 848
Author(s):  
Min SANG ◽  
Xiaochun QIN ◽  
Wenda WANG ◽  
Xiaobo CHEN ◽  
Jie XIE ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Oxygen Formation ◽  
Singlet Oxygen Formation

scholarly journals Synthesis and Physicochemical Properties of [(1R,2S,5R)-2-isopropyl-5-methylcyclohexyloxy]-thiophen-5-yl-substituted Tetrapyrazinoporphyrazine with Magnesium(II) Ion

2021 ◽  
Vol 11 (6) ◽  
pp. 2576
Author(s):  
Sebastian Lijewski ◽  
Jiří Tydlitát ◽  
Beata Czarczynska-Goslinska ◽  
Milan Klikar ◽  
Jadwiga Mielcarek ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Singlet Oxygen ◽  
2D Nmr ◽  
Nmr Studies ◽  
Oxygen Formation ◽  
Nmr Techniques ◽  
Flash Column Chromatography ◽  
Photochemical Stability ◽  
Singlet Oxygen Formation ◽  
Very High

Tetrapyrazinoporphyrazine with peripheral menthol-thiophenyl substituents was synthesized using Linstead conditions and purified by flash column chromatography. The optimized synthetic and purification procedures allowed us to obtain a new macrocycle with 36% yield. Tetrapyrazinoporphyrazine derivative was characterized by UV–Vis and NMR spectroscopy, as well as MS spectrometry. Complex NMR studies using 1D and 2D NMR techniques allowed the analysis of the bulky menthol-thiophenyl substituted periphery of the new macrocycle. Further, photochemical stability and singlet oxygen quantum yield were determined by indirect method with diphenylisobenzofuran. The new tetrapyrazinoporphyrazine revealed low generation of singlet oxygen with a quantum yield of singlet oxygen formation at 2.3% in dimethylformamide. In turn, the macrocycle under irradiation with visible light presented very high stability with quantum yield for photostability of 9.59 × 10−6 in dimethylformamide, which figures significantly exceed the border for its classification as a stable porphyrinoid (10−4–10−5).

scholarly journals Sequence-Specific Cargo Release from DNA Block Copolymers-Lipid Vesicles by Singlet Oxygen Formation

2012 ◽  
Vol 102 (3) ◽  
pp. 290a
Author(s):  
Alberto Rodriguez-Pulido ◽  
Alina I. Kondrachuk ◽  
Deepak K. Prusty ◽  
Andreas Herrmann
Keyword(s):  
Block Copolymers ◽  
Singlet Oxygen ◽  
Lipid Vesicles ◽  
Oxygen Formation ◽  
Singlet Oxygen Formation

Singlet oxygen formation and photostability of meso-tetraarylporphyrin derivatives and their copper complexes

2001 ◽  
Vol 144 (2-3) ◽  
pp. 131-140 ◽  
Author(s):  
José A.S. Cavaleiro ◽  
Helmut Görner ◽  
Paula S.S. Lacerda ◽  
J.Gavin MacDonald ◽  
Gertraud Mark ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Copper Complexes ◽  
Oxygen Formation ◽  
Singlet Oxygen Formation

scholarly journals New polymeric photosensitizers

2001 ◽  
Vol 73 (3) ◽  
pp. 491-495 ◽  
Author(s):  
Maria Nowakowska ◽  
Mariusz Kepczynski ◽  
Krzysztof Szczubialka
Keyword(s):  
Singlet Oxygen ◽  
Polymer Chain ◽  
Rose Bengal ◽  
Quantum Yields ◽  
Oxygen Production ◽  
Oxygen Formation ◽  
Singlet Oxygen Formation

Novel polymeric photosensitizers for singlet oxygen production in water are described. The polymers contain rose bengal (4,5,6,7-tetrachloro-2',4',5',7'­tetraiodo-fluorescein) chromophores covalently attached to the polymer chain. The quantum yields of singlet oxygen formation and photooxidation of phenol in water have been determined. The methods of separation of photosensitizer from the reactants after completion of reaction have been established.

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