Singlet molecular oxygen generation by water-soluble phthalocyanine dendrimers with different aggregation behavior

2011 ◽  
Vol 15 (01) ◽  
pp. 47-53 ◽  
Author(s):  
Masakazu Nishida ◽  
Hiroaki Horiuchi ◽  
Atsuya Momotake ◽  
Yoshinobu Nishimura ◽  
Hiroshi Hiratsuka ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Vertical Direction ◽  
Water Soluble ◽  
Aggregation Behavior ◽  
Central Metal ◽  
Aggregate Formation ◽  
Ring Plane ◽  
Singlet Molecular Oxygen ◽  
Oxygen Generation ◽  
Efficient Generation

Phthalocyanines having hydrophilic or lipophilic dendrons were synthesized to investigate the efficiencies of singlet molecular oxygen (1Δg) formation. The introduction of higher generation of dendrons to the central metal ( Si ) of phthalocyanine in vertical direction to their ring plane has resulted in the successful improvement in avoiding aggregate formation that resulted in efficient generation of 1Δg even in water.

Singlet Molecular Oxygen Generation by Oleic Acid Hydroperoxides with Nitronium Ion

2012 ◽  
Vol 53 ◽  
pp. S151
Author(s):  
Alexsandra Cristina Scalfo ◽  
Fernanda Manso Prado ◽  
Sayuri Miyamoto ◽  
Marisa Helena Gennari de Medeiros ◽  
Paolo Di Mascio
Keyword(s):  
Oleic Acid ◽  
Molecular Oxygen ◽  
Singlet Molecular Oxygen ◽  
Oxygen Generation

Acid-base and aggregation behavior of water soluble N-confused porphyrin

2014 ◽  
Vol 18 (03) ◽  
pp. 231-239 ◽  
Author(s):  
Janet L. Shaw ◽  
Jonathan L. McMurry ◽  
Pooya Salehi ◽  
Alexander Stovall
Keyword(s):  
Low Ph ◽  
Water Soluble ◽  
Aggregation Behavior ◽  
Aggregate Formation ◽  
Visible Spectroscopy ◽  
Acidic Media ◽  
Acid Base ◽  
Spectroscopic Evidence ◽  
Low Concentration ◽  
Uv Visible

The acid-base and aggregation behavior of water soluble meso-tetrakis(p-sulfonato-phenyl)N-confused porphyrin was explored using UV-visible spectroscopy. Stepwise protonation events were observed in acidic media with pK4 = 5.8 and pK3 = 7.7, and spectroscopic evidence suggests the formation of polymeric aggregates at low pH. meso-tetrakis(p-sulfonatophenyl)N-confused porphyrin was found to obey Beer's Law in dimethylformamide and methanol over the concentration range of 10-4 to 10-6 M and at low concentration in water. Deviations in water at higher concentration were analyzed to determine KD values for aggregate formation in the presence and absence of salt and buffer.

Singlet Molecular Oxygen Generation by the Reaction of Ozone with 8-Oxo-7,8-Dihydro-2′-Deoxyguanosine and Formation of Spiroiminodihydantoin Nucleoside

2010 ◽  
Vol 49 ◽  
pp. S213
Author(s):  
Flavia Daniela Motta ◽  
Sayuri Miyamoto ◽  
Alexsandra Cristina Scalfo ◽  
Glaucia Regina Martinez ◽  
Marisa Helena Gennari Medeiros ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Singlet Molecular Oxygen ◽  
Oxygen Generation

scholarly journals Biological hydroperoxides and singlet molecular oxygen generation

IUBMB Life ◽  
2007 ◽  
Vol 59 (4) ◽  
pp. 322-331 ◽  
Author(s):  
Sayuri Miyamoto ◽  
Graziella E. Ronsein ◽  
Fernanda M. Prado ◽  
Miriam Uemi ◽  
Thais C. Corrêa ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Singlet Molecular Oxygen ◽  
Oxygen Generation

Direct evidence of singlet molecular oxygen generation from peroxynitrate, a decomposition product of peroxynitrite

2009 ◽  
pp. 5720 ◽  
Author(s):  
Sayuri Miyamoto ◽  
Graziella E. Ronsein ◽  
Thaís C. Corrêa ◽  
Glaucia R. Martinez ◽  
Marisa H. G. Medeiros ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Decomposition Product ◽  
Direct Evidence ◽  
Singlet Molecular Oxygen ◽  
Oxygen Generation

Singlet molecular oxygen generation and quenching by the antiglaucoma ophthalmic drugs, Timolol and Pindolol

2002 ◽  
Vol 1 (10) ◽  
pp. 788-792 ◽  
Author(s):  
Susana Criado ◽  
Daniel Mártire ◽  
Patricia Allegretti ◽  
Jorge Furlong ◽  
Sonia G. Bertolotti ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Singlet Molecular Oxygen ◽  
Ophthalmic Drugs ◽  
Oxygen Generation
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