Results 171 to 180 of about 1,254,309 (209)

Thionation-enhanced through-space electronic coupling and excited-state dynamics in helicene diimides.

Chem Commun (Camb)
D'Orazio-Colman A, T A, Saji S, Hariharan M, Ravat P.   +4 more
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

UV-Photoexcitation of Encounter Complexes of Oxygen O2–O2 as a Source of Singlet Oxygen O2(1Δg) in Gas Phase

Chemical Physics Letters, 2010
Abstract The photogeneration of singlet oxygen O 2 ( a 1 Δ g ) resulted from the photoexcitation at 248 nm of gaseous oxygen at elevated pressure (3–80 atm) has been investigated. Singlet oxygen monitored by its IR-luminescence at 1.27 μm was found to appear via two processes which are identified to be due to absorption of individual O 2 molecules ...
Alexey V Baklanov, Sergei A Kochubei
exaly   +2 more sources

Photoexcitation of Zinc Phthalocyanine in Mouse Myeloma Cells: The Observation of Triplet States but Not of Singlet Oxygen.

Photochemistry and Photobiology, 1988
Abstract— Liposomes were used to deliver zinc phthalocyanine (ZnPC) to cultured mouse myeloma cells. ZnPC triplets states were observed when such systems were photoexcited. Singlet oxygen luminescence was not observed in cellular media. Solutions of ZnPC in various organic solvents, sodium dodecyl sulfate micelles and dipalmitoyl phosphatidyl choline ...
Michael A J Rodgers, G Joří, T W Jones
exaly   +3 more sources

Inglet Oxygen Generaion via Silver Nanoparticles UV-Photoexcitation

Khimicheskaya Fizika
The NIR-luminescence of suspension of silver nanoparticles stabilized in distilled water has been investigated by photoexcitation of surface plasmon resonance (SPR). The observed short-living luminescence with the spectral maximum at 1300 nm is attributed to the singlet oxugen molecules luminescence.
K. S. Ershov, S. V. Valiulin, A. P. Pyryaeva   +2 more
exaly   +2 more sources

Selective Transformation and Removal of As(III) by Constructed Fe−N Bonds: The Generation of Singlet Oxygen From the Photoexcitation of MnPc Leads to Abundant ZnFe−LDH Interface OH Radical

Science of the Total Environment, 2023
In this study, MnPc intercalated Zn/Fe layered double hydroxides (MnPc/ZF-LDH) were synthesized by pillared intercalation modification with different MnPc intercalation amounts and used for the selective transformation and removal of As(III) from the arsenate-phosphate mixed solution.
Wenlei Wang, Yao Deng, Hongbo Xiao
exaly   +3 more sources

Photoexcited triplet state and singlet oxygen generation of quinine, an antimalarial drug

Photochemical & Photobiological Sciences, 2023
Energy transfer from the lowest excited triplet (T1) state of quinine (QN) to ground-state molecular oxygen produces singlet oxygen. In aqueous solutions, a neutral form QN, a singly protonated cation QNH+ and doubly protonated cation QNH22+ are present according to their pKa values. To the best of our knowledge, the pH dependence of QN-photosensitized
Yuta, Suzuki, Mikio, Yagi, Azusa, Kikuchi   +2 more
openaire   +2 more sources

EVIDENCE FOR THE PRODUCTION OF SINGLET OXYGEN BY PHOTOEXCITED ACRIDINE ORANGE

Photochemistry and Photobiology, 1984
Abstract In contrast to previous results obtained with the nitroxide radical detection technique, generation of the specific 1O2 oxidation product of cholesterol shows that photoexcited acridine orange produces singlet oxygen.
J. Decuyper, N. Houba‐Héin, C. M. Calberg‐Bacq, A. Van De Vorst   +3 more
openaire   +1 more source

Lack of singlet oxygen formation by photoexcited promazine derivatives in aqueous and ethanolic solutions

Radiation and Environmental Biophysics, 1983
The EPR detection of nitroxide formation and the observation by thin layer chromatography of the specific 1O2 oxidation product of cholesterol, have been used to appreciate singlet oxygen production by promazine and four of its derivatives during irradiation with near-UV light of ethanolic and aqueous solutions.
J, Decuyper, J, Piette, M P, Merville, C M, Calberg-Bacq, A, Van de Vorst   +4 more
openaire   +2 more sources

Detection of singlet oxygen in photoexcited porous silicon nanocrystals by photoluminescence measurements

Semiconductors, 2010
Luminescence of gas-phase singlet oxygen optically sensitized by microporous silicon at room temperature is detected for the first time. At the same time, a photoinduced increase in the photoluminescence intensity of defects at the sample surface in oxygen atmosphere is observed.
M. B. Gongalsky, E. A. Konstantinova, L. A. Osminkina, V. Yu. Timoshenko   +3 more
openaire   +1 more source