Search results
Results From The WOW.Com Content Network
Phthalocyanine (H 2 Pc) is a large, aromatic, macrocyclic, organic compound with the formula (C 8 H 4 N 2) 4 H 2 and is of theoretical or specialized interest in chemical dyes and photoelectricity. It is composed of four isoindole units [ a ] linked by a ring of nitrogen atoms.
The 15th and 16th chlorides are difficult to install. The chemical formula usually ranges from C 32 H 3 Cl 13 CuN 8 to C 32 HCl 15 CuN 8. Due to the presence of strongly electronegative chlorine substituents, the absorption spectrum is shifted from that of the parent copper phthalocyanine.
Water is a critical component since its concentration is high in human tissue. The absorption spectrum of water in the range from 250 to 1000 nm is shown in Figure 2. Although absorption is rather low in this spectral range, it still contributes to the overall attenuation of tissue.
The substance, IUPAC name (29H,31H-phthalocyaninato(2−)-N29,N30,N31,N32)copper(II), is known by many names [2] such as monastral blue, phthalo blue, helio blue, [3] thalo blue, Winsor blue, [4] phthalocyanine blue, C.I. Pigment Blue 15:2, [5] [6] copper phthalocyanine blue, [7] copper tetrabenzoporphyrazine, [8] Cu-phthaloblue, [9] P.B.15.2, [10] [11] [12] C.I. 74160, [13] [14] [15] and ...
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
When cells that have absorbed photosensitizers are exposed to a specific wavelength of light, the photosensitizer produces a form of oxygen, called an oxygen radical, that kills them. Photodynamic therapy (PDT) may also damage blood vessels in the tumor, which prevents it from receiving the blood it needs to keep growing.
Electronic absorption spectra for porphyrazines are similar to those of phthalocyanines, [9] with an intense Soret band (λ ≈ 300 - 400 nm) and Q-band (λ > 600 nm). [ 8 ] [ 10 ] Porphyrazines exhibit fluorescence from the first excited singlet state (S 1 → S 0 ) [ 11 ] at visible and NIR wavelengths which is typical of tetrapyrrole ...
The SI unit of molar absorption coefficient is the square metre per mole (m 2 /mol), but in practice, quantities are usually expressed in terms of M −1 ⋅cm −1 or L⋅mol −1 ⋅cm −1 (the latter two units are both equal to 0.1 m 2 /mol).