scholarly journals Synthesis and investigation of singlet oxygen production efficiency of photosensitizers based on meso-phenyl-2,5-thienylene linked porphyrin oligomers and polymers

2015 ◽  
Vol 13 (42) ◽  
pp. 10496-10504 ◽  
Author(s):  
Rehan Khan ◽  
Muazzam Idris ◽  
Dönüs Tuncel
Keyword(s):  
Singlet Oxygen ◽  
Production Efficiency ◽  
Photophysical Properties ◽  
Triethylene Glycol ◽  
Oxygen Production ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

Three new Zn(ii)-, oligo- and poly(2,5-thienylene)-linked porphyrins, bearing multiple triethylene glycol (TEG) groups were synthesized and their photophysical properties as well as singlet oxygen generation efficiencies have been investigated to elucidate the possibility of their use as a photosensitizer.

The Photophysical Properties of Pyropheophorbide-a in Different Laser Light and PDT Efficiency for Eca-109 Cell In Vitro

2011 ◽  
Vol 393-395 ◽  
pp. 1029-1032
Author(s):  
Hui Jing Mao ◽  
Zhi Long Chen ◽  
Ying Ye
Keyword(s):  
Singlet Oxygen ◽  
Laser Light ◽  
Photophysical Properties ◽  
Oxygen Probe ◽  
Oxygen Production ◽  
Light Power ◽  
Oxygen Generation ◽  
Pyropheophorbide A ◽  
Single Oxygen

Pyropheophorbid-a (PyroPheo) is one of the well-known photosensitizers which can be useful for future clinical applications. This work is aimed to compare and measure generation rates of single oxygen through activation of pyropheophorbide-a by four different wavelength, and observe the sensitivity of pyropheophorbide-a mediated photodynamic therapy for eca-109 cell. Methods: UV-vis spectrophotometrics was used to measure decrease of singlet oxygen probe 9,10-dimethylanthracene(DPBF) so as to evaluate singlet oxygen production generation. The Eca-109 cells were were exposed to light (650nm) with a constant light power of 200mW/cm2, at a distance of 5cm, for 25 to 200 seconds. The results were measured by MTT assay. Results: pyropheophorbide-a in DMF solution irradiation by different light power can produce singlet oxygen quickly. Comparison of single oxygen generation rate has proved that photodynamic effect at 532nm is fastest, followed by 650nm, 635nm, 690nm which has correlation with absorbance of pyropheophorbide-a. The survival rate of cells dropped after irradiation by light what was significantly different from other groups. Conclusion: pyropheophorbide-a is an excellent photosensitizer and prooxidant. Through activated by different wavelength it could be apply to different disease

Photophysical Properties and Singlet Oxygen Generation of Three Sets of Halogenated Corroles

2012 ◽  
Vol 116 (49) ◽  
pp. 14228-14234 ◽  
Author(s):  
Wenli Shao ◽  
Hui Wang ◽  
Shuang He ◽  
Lei Shi ◽  
Kaimei Peng ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Photophysical Properties ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

Synthesis and functionalization of new polyhalogenated BODIPY dyes. Study of their photophysical properties and singlet oxygen generation

Tetrahedron ◽  
2012 ◽  
Vol 68 (4) ◽  
pp. 1153-1162 ◽  
Author(s):  
Maria J. Ortiz ◽  
Antonia R. Agarrabeitia ◽  
Gonzalo Duran-Sampedro ◽  
Jorge Bañuelos Prieto ◽  
Teresa Arbeloa Lopez ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Photophysical Properties ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

Porphyrin/Platinum(II) C^N^N Acetylide Complexes: Synthesis, Photophysical Properties, and Singlet Oxygen Generation

2016 ◽  
Vol 22 (12) ◽  
pp. 4164-4174 ◽  
Author(s):  
Atanu Jana ◽  
Luke McKenzie ◽  
Ashley B. Wragg ◽  
Masatoshi Ishida ◽  
Jonathan P. Hill ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Photophysical Properties ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

The Role of Gold Nanoparticles' Aspect Ratio in Plasmon-Enhanced Luminescence and Singlet Oxygen Generation Rate by Mo6 Clusters

2021 ◽  
Author(s):  
Evgeniya D. Novikova ◽  
Yuri A. Vorotnikov ◽  
Nazar A. Nikolaev ◽  
Alphiya R Tsygankova ◽  
Michael A. Shestopalov ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Aspect Ratio ◽  
Singlet Oxygen ◽  
Oxygen Production ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Oxygen Production Rate ◽  
Plasmon Enhanced Luminescence ◽  
Enhanced Luminescence

Here we present a study on the effect of the aspect ratio (AR) of gold nanoparticles on the emission intensity and singlet oxygen production rate of hexamolybdenum cluster-doped silica particles....

A quantitative structure–property relationship (QSPR) study of singlet oxygen generation by pteridines

2016 ◽  
Vol 15 (6) ◽  
pp. 801-811 ◽  
Author(s):  
Andrey A. Buglak ◽  
Taisiya A. Telegina ◽  
Mikhail S. Kritsky
Keyword(s):  
Dipole Moment ◽  
Singlet Oxygen ◽  
Quantum Yields ◽  
Quantitative Structure ◽  
Oxygen Production ◽  
Structure Property ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Structure Property Relationship ◽  
Qspr Study

Singlet oxygen production quantum yields of pteridine photosensitizers were analyzed with the QSPR method. The ability of pterins and flavins to generate1O2in D2O correlated withEHOMOand electronegativity, as well as with the dipole moment and some other parameters.

Photophysical properties and study of the singlet oxygen generation of tetraphenylporphyrinato palladium(II) complexes

2013 ◽  
Vol 17 (10) ◽  
pp. 964-971 ◽  
Author(s):  
Pınar Şen ◽  
Catherine Hirel ◽  
Ayşe-Gül Gürek ◽  
Chantal Andraud ◽  
Yann Bretonnière ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Room Temperature ◽  
Singlet State ◽  
Photophysical Properties ◽  
Spin Transfer ◽  
Excited Singlet ◽  
Excitation Spectra ◽  
X Ray ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

Three differently substituted Pd-tetraphenyl-porphyrins complexes were synthesized and their X-ray crystal and photophysical properties were studied. All compounds display intense phosphorescence in de-aerated solutions at room temperature with decay time in the μs range. An efficient spin transfer to oxygen in aerated solutions was monitored using singlet oxygen (1 O 2) luminescence at 1275 nm. For all compounds, the quantum efficiency for generating singlet oxygen was found to be close to unity. Interesting differences in the pathways from the excited singlet state to singlet oxygen via the intermediate triplet state were observed. The excitation spectra obtained while recording the phosphorescence at 1275 nm closely matched the absorption spectra with two bands: the Soret (or B) band near 410–420 nm and a split Q-band at 510–520 nm. Noticeable differences in the B/Q intensity ratio between the absorption and excitation spectra (for both phosphorescence and singlet oxygen luminescence) were determined, indicating different Sx → T1 pathways.

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