Photochemical Properties of Water-soluble Fluorinated Zinc Phthalocyanines and their Photocytotoxicity Against HeLa Cells

1998 ◽  
Vol 02 (03) ◽  
pp. 219-222 ◽  
Author(s):  
KAORU FUKUSHIMA ◽  
KENJI TABATA ◽  
ICHIRO OKURA
Keyword(s):  
Penetration Depth ◽  
Hela Cells ◽  
Water Soluble ◽  
Absorption Bands ◽  
Long Wavelength ◽  
Zinc Phthalocyanines ◽  
Photodynamic Activity ◽  
Photochemical Properties

Three types of amphiphilic water-soluble fluorinated zinc phthalocyanines are characterized. They have absorption bands at long wavelength, which cause greater penetration depth of a tissue. The uptake and photodynamic activity of the phthalocyanines against HeLa cells were measured, showing that the phthalocyanines exhibited higher photodynamic activities than zinc tetrasulfonated phthalocyanine.

Upconversion nanocomposites for photo-based cancer theranostics

2016 ◽  
Vol 4 (32) ◽  
pp. 5331-5348 ◽  
Author(s):  
Shuailiang Wang ◽  
Anyao Bi ◽  
Wenbin Zeng ◽  
Zhen Cheng
Keyword(s):  
Penetration Depth ◽  
High Energy ◽  
Upconversion Nanoparticles ◽  
Tissue Penetration ◽  
Excitation Light ◽  
Long Wavelength ◽  
Photochemical Properties ◽  
Cancer Theranostics ◽  
Significant Attention

Upconversion nanoparticles (UCNPs) are able to convert long wavelength excitation light into high energy ultraviolet (UV) or visible emissions, and they have attracted significant attention because of their distinct photochemical properties including sharp emission bands, low autofluorescence, high tissue penetration depth and minimal photodamage to tissues.

Synthesis, photophysical and photochemical properties of crown ether substituted zinc phthalocyanines

2009 ◽  
Vol 159 (15-16) ◽  
pp. 1563-1571 ◽  
Author(s):  
Mahmut Durmuş ◽  
Zekeriya Bıyıklıoğlu ◽  
Halit Kantekin
Keyword(s):  
Crown Ether ◽  
Zinc Phthalocyanines ◽  
Photochemical Properties

Photocytotoxicity of Anthracyclines upon Laser Excitation in Their Long-Wavelength Absorption Bands

1991 ◽  
Vol 127 (1) ◽  
pp. 24 ◽  
Author(s):  
Alessandra Andreoni ◽  
Alberto Colasanti ◽  
Vincenzo Malatesta ◽  
Giuseppe Roberti
Keyword(s):  
Laser Excitation ◽  
Absorption Bands ◽  
Long Wavelength ◽  
Wavelength Absorption

Phosphine-Free, Highly Emissive, Water-Soluble Mn:ZnSe/ZnS Core–Shell Nanorods: Synthesis, Characterization, and in Vitro Bioimaging of HEK293 and HeLa Cells

2017 ◽  
Vol 1 (1) ◽  
pp. 371-383 ◽  
Author(s):  
Joicy Selvaraj ◽  
Arun Mahesh ◽  
Vijayshankar Asokan ◽  
Vaseeharan Baskaralingam ◽  
Arunkumar Dhayalan ◽  
...  
Keyword(s):  
Hela Cells ◽  
Water Soluble ◽  
Core Shell

scholarly journals THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA

1940 ◽  
Vol 23 (4) ◽  
pp. 483-494 ◽  
Author(s):  
C. S. French
Keyword(s):  
Spectral Region ◽  
Photosynthetic Bacteria ◽  
Water Soluble ◽  
Absorption Curve ◽  
Absorption Bands ◽  
Soluble Cell

Absorption curves have been obtained in the spectral region of 450 to 900 mµ for the water soluble cell juice of four species of photosynthetic bacteria, Spirillum rubrum (strain S1), Rhodovibrio sp. (strain Gaffron), Phaeomonas sp. (strain Delft), and Streptococcus varians (strains C11 and orig.). These curves all show maxima at 790 and 590 mµ due to bacteriochlorophyll, whose highest band, however, occurs at 875, 855, or 840 mµ depending on the species. The bacteria that appear red rather than brown have a band at 550 mµ due to a carotinoid pigment. An absolute absorption curve of bacteriophaeophytin has maxima at 530 and 750 mµ. The extraction of cell juice by supersonic vibration does not change the position of the absorption bands or of the light absorbing capacity of the pigment.

scholarly journals Red and Near-Infrared Absorbing Dicyanomethylene Squaraine Cyanine Dyes: Photophysicochemical Properties and Anti-Tumor Photosensitizing Effects

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2083
Author(s):  
Tiago D. Martins ◽  
Eurico Lima ◽  
Renato E. Boto ◽  
Diana Ferreira ◽  
José R. Fernandes ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Near Infrared ◽  
Cyanine Dyes ◽  
Quantum Yields ◽  
Squaraine Dyes ◽  
Photodynamic Activity ◽  
Photochemical Properties ◽  
Radiation Treatments ◽  
Species Production

Photodynamic therapy is a medical modality developed for the treatment of several diseases of oncological and non-oncological etiology that requires the presence of a photosensitizer, light and molecular oxygen, which combined will trigger physicochemical reactions responsible for reactive oxygen species production. Given the scarcity of photosensitizers that exhibit desirable characteristics for its potential application in this therapeutic strategy, the main aims of this work were the study of the photophysical and photochemical properties and the photobiological activity of several dicyanomethylene squaraine cyanine dyes. Thus, herein, the study of their aggregation character, photobleaching and singlet oxygen production ability, and the further application of the previously synthesized dyes in Caco-2 and HepG2 cancer cell lines, to evaluate their phototherapeutic effects, are described. Dicyanomethylene squaraine dyes exhibited moderate light-stability and, despite the low singlet oxygen quantum yields, were a core of dyes that exhibited relevant in vitro photodynamic activity, as there was an evident increase in the toxicity of some of the tested dyes exclusive to radiation treatments.

Spectral, photophysical and photochemical properties of tetra- and octaglycosylated zinc phthalocyanines

2012 ◽  
Vol 11 (4) ◽  
pp. 679 ◽  
Author(s):  
Zafar Iqbal ◽  
Nkosiphile Masilela ◽  
Tebello Nyokong ◽  
Alexey Lyubimtsev ◽  
Michael Hanack ◽  
...  
Keyword(s):  
Zinc Phthalocyanines ◽  
Photochemical Properties

Synthesis and studies on photodynamic activity of new water-soluble azaphthalocyanines

2003 ◽  
Vol 155 (1-3) ◽  
pp. 127-131 ◽  
Author(s):  
Petr Zimcik ◽  
Miroslav Miletin ◽  
Jan Ponec ◽  
Miroslav Kostka ◽  
Zdenek Fiedler
Keyword(s):  
Water Soluble ◽  
Photodynamic Activity
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