Influence of Charge Transfer Interactions on the Sensitization of Singlet Oxygen:  Formation of O2(1Σg+), O2(1Δg), and O2(3Σg-) during Oxygen Quenching of Triplet Excited Biphenyl Derivatives

2001 ◽  
Vol 105 (39) ◽  
pp. 8871-8877 ◽  
Author(s):  
Reinhard Schmidt ◽  
Farokh Shafii
Keyword(s):  
Charge Transfer ◽  
Singlet Oxygen ◽  
Oxygen Quenching ◽  
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
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