Photooxygenation of alkenes by molecular oxygen in the presence of porphyrins and chlorin sensitizers under visible light irradiation

2010 ◽  
Vol 14 (07) ◽  
pp. 639-645 ◽  
Author(s):  
Mahdi Hajimohammadi ◽  
Nasser Safari
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Visible Light Irradiation ◽  
Oxidation Products ◽  
Light Irradiation ◽  
Free Base ◽  
Alkene Oxidation ◽  
Conversion Rates

Photooxidation of alkenes by molecular oxygen and visible light in the presence of tetraphenylporphyrin (H2TPP) , tetramesitylporphyrin (H2TMP) , tetrakis pentafluorophenylporphyrin (H2TPFPP) and tetrakis(2,3-dimetoxyphenyl)porphyrin T(2,3-OMeP)P and metalloporphyrins such as ClFeTPP , ClMnTMP , ClMnTPP , ClMnTPFPP , ClCoTPP and ZnTPP has been performed. Photooxidation of alkenes with tetraphenylchlorin (H2TPC) as the sensitizer with visible light has also been studied. The conversion rates for alkene oxidation were in the order of free-base porphyrins > chlorin > metalloporphyrins. In the presence of NaN3/Na2SO3 the yield of oxidation products and conversion percentage is considerably reduced, confirming involvement of 1O2 in the mechanism.

scholarly journals Singlet oxygen generation properties of an inclusion complex of cyclic free-base porphyrin dimer and fullerene C60

RSC Advances ◽  
2017 ◽  
Vol 7 (30) ◽  
pp. 18690-18695 ◽  
Author(s):  
Yousuke Ooyama ◽  
Toshiaki Enoki ◽  
Joji Ohshita ◽  
Takuya Kamimura ◽  
Shuwa Ozako ◽  
...  
Keyword(s):  
Inclusion Complex ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Visible Light Irradiation ◽  
Fullerene C60 ◽  
Light Irradiation ◽  
Free Base ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Porphyrin Dimer

We demonstrate that a cyclic free-base porphyrin dimer and its inclusion complex with fullerene C60 possess the ability to generate singlet oxygen (1O2) under visible light irradiation.

Visible light-promoted copper catalyzed regioselective acetamidation of terminal alkynes by arylamines

2020 ◽  
Vol 22 (4) ◽  
pp. 1164-1170 ◽  
Author(s):  
V. Kishore Kumar Pampana ◽  
Arunachalam Sagadevan ◽  
Ayyakkannu Ragupathi ◽  
Kuo Chu Hwang
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Light Irradiation ◽  
Terminal Alkynes

Herein, we describe a copper photoredox catalyzed synthesis of acetamide via regioselective C–N coupling of arylamines with terminal alkynes using molecular oxygen (O2) as an oxidant at room temperature under visible light irradiation (47 examples).

Photopolymerization of OCDMA Dimetacrylate Initiated by 3,5-Di-tert-Butyl-o- Quinone and its Bis-O-Benzoquinone

2020 ◽  
Vol 869 ◽  
pp. 129-134
Author(s):  
Elnara Zhiganshina ◽  
Maxim Arsenyev ◽  
Alexey Konev ◽  
Yuri Chechet ◽  
Sergey Chesnokov
Keyword(s):  
Visible Light ◽  
Kinetic Parameters ◽  
Molecular Oxygen ◽  
Visible Light Irradiation ◽  
High Stability ◽  
Spectral Characteristics ◽  
Argon Atmosphere ◽  
Light Irradiation ◽  
Long Time

The reactivity of 3,5-di-tert-butyl-o-benzoquinone and its bis-o-benzoquinone derivative in photoreduction reaction and polymerization of dimethacrylate (OCDMA) (in bulk and in the presence of 1-butanol) with using of them as photoinitiators under visible light irradiation under argon atmosphere or air were investigated. It was found that the kinetic parameters of the bis-o-quinone photoreactions have low sensitive to the presence of molecular oxygen. The high stability of the spectral characteristics of resulting polymers based on bis-o-quinones compositions for the long time was established.

Metal chlorides-catalyzed selective oxidation of cyclohexane by molecular oxygen under visible light irradiation

2012 ◽  
Vol 286 ◽  
pp. 6-12 ◽  
Author(s):  
Wenfeng Wu ◽  
Xiangling He ◽  
Zaihui Fu ◽  
Yachun Liu ◽  
Yanlong Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Metal Chlorides

Metal-Free Epoxidation of Alkenes with Molecular Oxygen and Benzaldehyde under Visible Light Irradiation

Synlett ◽  
2009 ◽  
Vol 2009 (18) ◽  
pp. 3024-3026 ◽  
Author(s):  
Akichika Itoh ◽  
Norihiro Tada ◽  
Hiroaki Okubo ◽  
Tsuyoshi Miura
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Metal Free ◽  
Epoxidation Of Alkenes

ChemInform Abstract: Photooxidative Cleavage of Aromatic Alkenes into Aldehydes Using Catalytic Iodine and Molecular Oxygen under Visible Light Irradiation.

ChemInform ◽  
2014 ◽  
Vol 45 (38) ◽  
pp. no-no
Author(s):  
Akitoshi Fujiya ◽  
Atsumasa Kariya ◽  
Tomoya Nobuta ◽  
Norihiro Tada ◽  
Tsuyoshi Miura ◽  
...  
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Visible Light Irradiation ◽  
Light Irradiation

Synergistic cooperative effect of CF3SO2Na and bis(2-butoxyethyl)ether towards selective oxygenation of sulfides with molecular oxygen under visible-light irradiation

2021 ◽  
Author(s):  
Kai-Jian Liu ◽  
Zheng Wang ◽  
Ling-Hui Lu ◽  
Jin-Yang Chen ◽  
Fei Zeng ◽  
...  
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Visible Light Irradiation ◽  
Practical Method ◽  
Cooperative Effect ◽  
Light Irradiation

A practical method for the switchable synthesis of sulfoxides and sulfones through visible-light-initiated CF3SO2Na/2-butoxyethyl ether synergistic catalyzed oxygenation of sulfides was developed.

Aerobic photooxidative synthesis of 2-aryl-4-quinazolinones from aromatic aldehydes and aminobenzamide using catalytic amounts of molecular iodine

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63952-63954 ◽  
Author(s):  
Y. Nagasawa ◽  
Y. Matsusaki ◽  
T. Nobuta ◽  
N. Tada ◽  
T. Miura ◽  
...  
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Visible Light Irradiation ◽  
Aromatic Aldehydes ◽  
Catalytic Amount ◽  
Molecular Iodine ◽  
Light Irradiation ◽  
Environmentally Benign ◽  
Synthetic Method

This study reports a safe, mild, and environmentally benign synthetic method toward 2-aryl-4-quinazolinones through a cyclization–oxidation sequence using a catalytic amount of iodine, harmless visible light irradiation, and molecular oxygen.

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