Enhancement of two-photon absorption cross section and singlet-oxygen generation in porphyrin-cored star polymers

2009 ◽  
Vol 52 (1) ◽  
pp. 56-63 ◽  
Author(s):  
Yan Wan ◽  
Ke Jia ◽  
BinSong Li ◽  
ZhiShan Bo ◽  
AnDong Xia
Keyword(s):  
Singlet Oxygen ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Star Polymers ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Oxygen Generation ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Singlet Oxygen Generation

Enhancement of Two-Photon Absorption Cross-Section and Singlet-Oxygen Generation in Porphyrins upon β-Functionalization with Donor−Acceptor Substituents

2006 ◽  
Vol 8 (13) ◽  
pp. 2719-2722 ◽  
Author(s):  
Marika Morone ◽  
Luca Beverina ◽  
Alessandro Abbotto ◽  
Fabio Silvestri ◽  
Elisabetta Collini ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Oxygen Generation ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Singlet Oxygen Generation ◽  
Donor Acceptor

Two-Photon Singlet Oxygen Sensitizers:  Quantifying, Modeling, and Optimizing the Two-Photon Absorption Cross Section

2001 ◽  
Vol 105 (51) ◽  
pp. 11488-11495 ◽  
Author(s):  
Tina D. Poulsen ◽  
Peter K. Frederiksen ◽  
Mikkel Jørgensen ◽  
Kurt V. Mikkelsen ◽  
Peter R. Ogilby
Keyword(s):  
Singlet Oxygen ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon

Syntheses and properties of acetylene-linked bis- and trisporphyrins toward two-photon photodynamic therapy

2007 ◽  
Vol 11 (06) ◽  
pp. 406-417 ◽  
Author(s):  
Yusuke Inaba ◽  
Kazuya Ogawa ◽  
Yoshiaki Kobuke
Keyword(s):  
Photodynamic Therapy ◽  
Cross Section ◽  
Sodium Salt ◽  
Absorption Cross Section ◽  
Water Soluble ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Photon Irradiation ◽  
Two Photon

Acetylene-bridged bisporphyrins and trisporphyrins having branched bulky bis(carboxylethyl)methyl meso-substituents were synthesized. These compounds showed large effective two-photon absorption cross-section values at 890 nm measured by using a nanosecond Z-scan method. Sodium salt of hydrolyzed trisporphyrins showed broad and red-shifted Q-bands over 900 nm. Two-photon absorption cross-section values of water-soluble dimers in water were similar to, or slightly larger than, those of ester forms evaluated in toluene. Furthermore, the generation of singlet oxygen upon one-photon irradiation for dimers in water was confirmed.

scholarly journals Highly efficient singlet oxygen generation, two-photon photodynamic therapy and melanoma ablation by rationally designed mitochondria-specific near-infrared AIEgens

2020 ◽  
Vol 11 (9) ◽  
pp. 2494-2503 ◽  
Author(s):  
Zheng Zheng ◽  
Haixiang Liu ◽  
Shaodong Zhai ◽  
Haoke Zhang ◽  
Guogang Shan ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Molecular Engineering ◽  
Photon Absorption ◽  
Oxygen Generation ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Singlet Oxygen Generation ◽  
Highly Efficient

Mitochondria-targeted photosensitizers with highly efficient singlet oxygen generation, bright near-infrared AIE and good two-photon absorption are obtained through ingenious molecular engineering for cancer cell-selective photodynamic therapy.

scholarly journals Ultrafast processes triggered by one- and two-photon excitation of a photochromic and luminescent hydrazone

2019 ◽  
Vol 15 ◽  
pp. 2438-2446 ◽  
Author(s):  
Alessandro Iagatti ◽  
Baihao Shao ◽  
Alberto Credi ◽  
Barbara Ventura ◽  
Ivan Aprahamian ◽  
...  
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Transient Absorption ◽  
Solvent Polarity ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Time Resolved ◽  
Two Photon Absorption ◽  
Two Photon

In this work we apply a combination of steady state and time resolved luminescence and absorption spectroscopies to investigate the excited-state dynamics of a recently developed molecular photoswitch, belonging to the hydrazone family. The outstanding properties of this molecule, involving fluorescence toggling, bistability, high isomerization quantum yield and non-negligible two-photon absorption cross section, make it very promising for numerous applications. Here we show that the light induced Z/E isomerization occurs on a fast <1 ps timescale in both toluene and acetonitrile, while the excited state lifetime of the Z-form depends on solvent polarity, suggesting a partial charge transfer nature of its low lying excited state. Time-resolved luminescence measurements evidence the presence of a main emission component in the 500–520 nm spectral range, attributed to the Z-isomer, and a very short living blue-shifted emission, attributed to the E-isomer. Finally, transient absorption measurements performed upon far-red excitation are employed as an alternative method to determine the two-photon absorption cross-section of the molecule.

Measurement of two-photon absorption cross-section in organic molecular salt with linear and circular polarized radiation

2004 ◽  
Vol 79 (2) ◽  
pp. 235-238 ◽  
Author(s):  
A.K. Dharmadhikari ◽  
A.S. Sandhu ◽  
J.A. Dharmadhikari ◽  
A. Mishra ◽  
G.R. Kumar
Keyword(s):  
Cross Section ◽  
Absorption Cross Section ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Molecular Salt ◽  
Polarized Radiation
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