scholarly journals Small water-soluble pyrimidine hexafluorophosphate derivatives with high two-photon absorption activities in the near-IR region and their biological applications

RSC Advances ◽  
2017 ◽  
Vol 7 (32) ◽  
pp. 20068-20075 ◽  
Author(s):  
Qiong Zhang ◽  
Rongting Guan ◽  
Xiaohe Tian ◽  
Lei Luo ◽  
Hongping Zhou ◽  
...  
Keyword(s):  
Cross Section ◽  
Living Cells ◽  
Water Soluble ◽  
Photon Absorption ◽  
Biological Applications ◽  
Two Photon Absorption ◽  
Small Water ◽  
Two Photon ◽  
Near Ir ◽  
Fluorescence Methods

Two imidazole–pyrimidine hexafluorophosphate derivatives (6P and 10P) are synthesized. The 2PA cross-section values (σ) were obtained by Z-scan and two-photon excited fluorescence methods. 6P and 10P can be used to quantify and image organelles in living cells and tissues.

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.

Water-Soluble Paracyclophane Fluorophores with Large Two-Photon Action Cross Sections

2005 ◽  
Vol 871 ◽  
Author(s):  
Han Young Woo ◽  
Dmitry Korystov ◽  
Alexander Mikhailovsky ◽  
Guillermo C. Bazan
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Solvent Polarity ◽  
Water Soluble ◽  
Photon Absorption ◽  
Significant Drop ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Ability ◽  
Fine Tune

AbstractA series of tetradonor substituted [2.2]paracyclophane-based two-photon absorption (TPA) fluorophores were designed, synthesized and characterized. Different substituents were chosen to modulate the conjugation and the donor strength and to allow the molecules to be neutral (N series, organic-soluble) or charged (C series, water-soluble). The overall set of compounds series allows us to examine the correlation among the solvent polarity, donor ability of the substituents, and TPA action cross section (ηδd, where δ is the TPA cross section and η is the quantum yield). In water, a significant drop of both δ and η is observed, approximately one-third relative to those in toluene. Weaker donors and/or weaker acceptors with enhanced conjugation are a better choice due to a minimized quenching related to strong charge transfer (CT) upon excitation. One thus needs to fine-tune the magnitude of CT and find an optimal balance among CT,δ and η.

scholarly journals Two-Photon Photodynamic Therapy by Water-Soluble Self-Assembled Conjugated Porphyrins

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Kazuya Ogawa ◽  
Yoshiaki Kobuke
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Cross Section ◽  
Water Soluble ◽  
Photon Absorption ◽  
Time Resolved ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Luminescence Measurement ◽  
Water Soluble Porphyrin

Studies on two-photon absorption (2PA) photodynamic therapy (PDT) by using three water-soluble porphyrin self-assemblies consisting of ethynylene-linked conjugatedbis(imidazolylporphyrin) are reviewed. 2PA cross-section values in water were obtained by an open aperture Z-scan measurement, and values were extremely large compared with those of monomeric porphyrins such as hematoporphyrin. These compounds were found to generate singlet oxygen efficiently upon one- as well as two-photon absorption as demonstrated by the time-resolved luminescence measurement at the characteristic band of singlet oxygen at 1270 nm and by using its scavenger. Photocytotoxicities for HeLa cancer cells were examined and found to be as high as those of hematoporphyrin, demonstrating that these compounds are potential candidates for 2PA-photodynamic therapy agents.

scholarly journals Probe for simultaneous membrane and nucleus labeling in living cells and in vivo bioimaging using a two-photon absorption water-soluble Zn(ii) terpyridine complex with a reduced π-conjugation system

2017 ◽  
Vol 8 (1) ◽  
pp. 142-149 ◽  
Author(s):  
Xiaohe Tian ◽  
Qiong Zhang ◽  
Mingzhu Zhang ◽  
Kajsa Uvdal ◽  
Qin Wang ◽  
...  
Keyword(s):  
Live Cell Imaging ◽  
Cell Imaging ◽  
Living Cells ◽  
Water Soluble ◽  
Photon Absorption ◽  
Conjugation System ◽  
Two Photon Absorption ◽  
Two Photon ◽  
System P

A two-photon absorption water-soluble Zn(ii) probe for simultaneous membrane nucleus live cell imaging and its potential for blood-brain barrier staining.

Styrylpyridine salts-based red emissive two-photon turn-on probe for imaging the plasma membrane in living cells and tissues

The Analyst ◽  
2016 ◽  
Vol 141 (11) ◽  
pp. 3228-3232 ◽  
Author(s):  
Lifang Guo ◽  
Ruoyao Zhang ◽  
Yuming Sun ◽  
Minggang Tian ◽  
Ge Zhang ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Cross Section ◽  
Living Cells ◽  
Photon Absorption ◽  
Tissue Imaging ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Turn On ◽  
Membrane Probe

Based on styrylpyridine salts, a small-molecule far-red emissive turn-on membrane probe with large two-photon absorption cross-section has been developed for tissue-imaging.

A Quadruply Azulene-Fused Porphyrin with Intense Near-IR Absorption and a Large Two-Photon Absorption Cross Section

2006 ◽  
Vol 118 (24) ◽  
pp. 4048-4051 ◽  
Author(s):  
Kei Kurotobi ◽  
Kil Suk Kim ◽  
Su Bum Noh ◽  
Dongho Kim ◽  
Atsuhiro Osuka
Keyword(s):  
Cross Section ◽  
Absorption Cross Section ◽  
Photon Absorption ◽  
Ir Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Near Ir
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