Long-distance energy transfer photosensitizers arising in hybrid nanoparticles leading to fluorescence emission and singlet oxygen luminescence quenching

2012 ◽  
Vol 11 (5) ◽  
pp. 803 ◽  
Author(s):  
Aymeric Sève ◽  
Pierre Couleaud ◽  
François Lux ◽  
Olivier Tillement ◽  
Philippe Arnoux ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Singlet Oxygen ◽  
Fluorescence Emission ◽  
Luminescence Quenching ◽  
Hybrid Nanoparticles ◽  
Long Distance

scholarly journals Regulation of bi-color fluorescence changes of AIE supramolecular self-assembly gels by the interaction with Al3+ and energy transfer

2021 ◽  
Author(s):  
Xinxian Ma ◽  
Jinlong Yue ◽  
Bo Qiao ◽  
LIli Zhou ◽  
Yang Gao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Self Assembly ◽  
Fluorescence Emission ◽  
Fluorescent Materials

Supramolecular fluorescent materials have attracted considerable attention in recent years since they endow specific and unique properties to materials. Nevertheless, the utilization of photo-responsive characteristics to modulate their fluorescence emission...

From photosensitizers to light harvesters adapting the molecular structure in all-BODIPY assemblies

2021 ◽  
Author(s):  
Edurne Avellanal Zaballa ◽  
Alejandro Prieto ◽  
Carolina Diaz Norambuena ◽  
Jorge Bañuelos ◽  
Antonia R Agarrabeitia ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Energy Transfer ◽  
Singlet Oxygen ◽  
Halogen Free

Herein we detail a protocol to design dyads and triads based solely on BODIPY dyes as halogen-free singlet oxygen photosensitizers or energy transfer molecular cassettes. The conducted photonic characterization reveals...

scholarly journals Photophysical Properties of Protoporphyrin IX, Pyropheophorbide-a, and Photofrin® in Different Conditions

2021 ◽  
Vol 14 (2) ◽  
pp. 138
Author(s):  
Bauyrzhan Myrzakhmetov ◽  
Philippe Arnoux ◽  
Serge Mordon ◽  
Samir Acherar ◽  
Irina Tsoy ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Photophysical Properties ◽  
Protoporphyrin Ix ◽  
Fluorescence Emission ◽  
Solvent Polarity ◽  
Visible Absorption ◽  
Light Dosimetry ◽  
Time Resolved ◽  
Pyropheophorbide A ◽  
Influence Of Solvent

Photodynamic therapy (PDT) is an innovative treatment of malignant or diseased tissues. The effectiveness of PDT depends on light dosimetry, oxygen availability, and properties of the photosensitizer (PS). Depending on the medium, photophysical properties of the PS can change leading to increase or decrease in fluorescence emission and formation of reactive oxygen species (ROS) especially singlet oxygen (1O2). In this study, the influence of solvent polarity, viscosity, concentration, temperature, and pH medium on the photophysical properties of protoporphyrin IX, pyropheophorbide-a, and Photofrin® were investigated by UV-visible absorption, fluorescence emission, singlet oxygen emission, and time-resolved fluorescence spectroscopies.

scholarly journals Contribution of resonance energy transfer to the luminescence quenching of upconversion nanoparticles with graphene oxide

2020 ◽  
Vol 575 ◽  
pp. 119-129 ◽  
Author(s):  
Diego Mendez-Gonzalez ◽  
Oscar G. Calderón ◽  
Sonia Melle ◽  
Jesús González-Izquierdo ◽  
Luis Bañares ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Luminescence Quenching ◽  
Upconversion Nanoparticles

Effective Singlet Oxygen Generation in Silica‐Coated CsPbBr 3 Quantum Dots through Energy Transfer for Photocatalysis

ChemSusChem ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 682-687 ◽  
Author(s):  
Kailun Gu ◽  
Yu Wang ◽  
Jianhua Shen ◽  
Jingrun Zhu ◽  
Yihua Zhu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Singlet Oxygen ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

CHEMILUMINESCENCE AND ENERGY TRANSFER FROM SINGLET OXYGEN PAIRS

1969 ◽  
Vol 10 (6) ◽  
pp. 375-382 ◽  
Author(s):  
Claude Balny ◽  
Jennifer Canva ◽  
Pierre Douzou ◽  
Jean Bourdon
Keyword(s):  
Energy Transfer ◽  
Singlet Oxygen

Energy transfer processes in luminescence quenching and in photolysis of clathrates

1978 ◽  
Vol 9 (2) ◽  
pp. 272-273
Author(s):  
A. Guarino ◽  
G. Occhiucci ◽  
E. Possagno ◽  
R. Bassanelli ◽  
A. Patacchiola
Keyword(s):  
Energy Transfer ◽  
Luminescence Quenching ◽  
Transfer Processes

PEGylated AIEgen Molecular Probe for Hypoxia-Mediated Tumor Imaging and Photodynamic Therapy

2021 ◽  
Author(s):  
Jun Li ◽  
Wei Liu ◽  
Zhuhao Li ◽  
Yingcai Hu ◽  
Jinfeng Yang ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Tumor Imaging ◽  
Fluorescence Emission ◽  
Molecular Probe ◽  
Enhanced Fluorescence ◽  
High Concentrations

Unlike the aggregation caused quenching (ACQ) and reduced singlet oxygen (1O2) production of traditional photosensitizers at high concentrations, AIEgen photosensitizers show enhanced fluorescence emission and photosensitization ability in the aggregated...

Sensitizing effect of Yb3+ on near-infrared fluorescence emission of Cr4+-doped calcium aluminate glasses

2000 ◽  
Vol 15 (2) ◽  
pp. 278-281 ◽  
Author(s):  
Yong Gyu Choi ◽  
Kyong Hon Kim ◽  
Yong Seop Han ◽  
Jong Heo
Keyword(s):  
Energy Transfer ◽  
Calcium Aluminate ◽  
Near Infrared ◽  
Fluorescence Emission ◽  
Dipole Interaction ◽  
Energy Transfer Mechanism ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
Sensitizing Effect ◽  
Decay Behavior

We have demonstrated that an efficient energy transfer takes place from Yb3+ to Cr4+ in calcium aluminate glasses. Yb3+ improves excitation efficiency at around 980 nm, enhancing emission intensity of Cr4+ fluorescence at 1.2–1.6 μm. Nonradiative energy transfer via electric dipole–dipole interaction between ytterbium and chromium ions was found to be dominant over radiative Yb3+ → Cr4+ energy transfer. A diffusionlimited energy transfer mechanism well explains the decay behavior of Yb3+/Cr4+- codoped glasses. This codoping scheme may be applicable to other Cr4+-containing crystals and glasses.

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