Soret band

So·ret band

(sō-rā'),
the absorption band of all porphyrins at about 400 nm.

Soret,

Charles, French radiologist, 1854-1931.
Soret band - the absorption band of all porphyrins at about 400 nm.
Soret phenomenon - in a solution kept in a long, upright tube at room temperature, the upper part being the warmer, is also the more concentrated.
References in periodicals archive ?
The transition of S0 to S1 causes the weak Q bands in visible region, while the transition of S0 to S2 produces the strong Soret band in near UV region [49, 50].
It can be observed that the increase in [beta]-carotene concentration leads to the increase in the intensity of the absorption of the Soret band (Figure 6).
"The ultraviolet-vis spectra indicate no significant shifts in the Soret band during reduction or oxidation with a LiPF6 electrolyte, demonstrating that the heme chemical structure is not changed even in an O2-containing environment."
To simulate data set one have to construct bathochromic red shifts 15-20 nm and hypochromicities at [[lambda].sub.max] (60-70%) of the Soret band were observed during coordination TMPyP4 to G4.
for [C.sub.44][H.sub.28]Cl[N.sub.4]In: C, 69.26; H, 3.70; N, 7.34; Found: C, 69.40, H, 3.78, N, 7.23; IR (KBr, [cm.sup.-1]): 523 (In-N- stretching of metal and ligand coordination); [sup.1]H-NMR (500 MHz, CD[Cl.sub.3], [delta]/ppm): 9.07 (8H, s, pyrrole), 8.38 (4H, d, o-phenyl), 8.10 (4H, d, o'phenyl), 7.786 (12H, s, m-phenyl, p-phenyl); [sup.13]C-NMR (500 MHz, CD[Cl.sub.3], [delta]/ppm): 121.75 ([C.sub.meso]), 127.75 ([C.sub.3,5]), 127.99 ([C.sub.4]), 132.76 ([C.sub.[beta]]), 135.09 ([C.sub.2,6]), 141.96 ([C.sub.1]), 149.46 ([C.sub.[alpha]]); MS (m/z, (relative abundance, %)) for [C.sub.44][H.sub.28]Cl[N.sub.4]In UV-Vis (CH[Cl.sub.3]) ([[lambda].sub.max]/nm): 426 (Soret band), 560 and 599 (Q-bands).
In this spectrum, the wide band from 200 nm to 270 nm is due to acetone [14] while a narrow band appearing at 414 nm can be identified as the Soret band. Additionally, two smaller bands are clearly observed at 530 nm and 569 nm.
The oxidized c Cyts have a Soret band at 409 nm and a broad band at 528 nm (Figure 3).
Decrease in absorbance of the Soret band of hemin could be due to the addition of artemisinin or its derivatives.
The UV-visible spectrum of this species shows a bathochromic-shifted Soret band (20-40 nm); the [Q.sub.IV] and [Q.sub.III] bands disappear, while the [Q.sub.I] signal grows and masks the [Q.sub.II] band [2, 3, 53].
Opaque sunscreen containing titanium dioxide or zinc oxide, possibly with added iron oxide may be of limited value because of the pasty nature of the preparations, hence they are not practical for daily use.7 Moreover, use of amber window film on home or car window can reduce exposure to Soret band range.
The changes of the non-illuminated HPD Soret band in solutions of various pH show that, in a slightly acidic medium, the PS is more aggregated than in neutral or alkaline solution (Fig.
The Soret band energies of five porphyrins show significant correlations ([absolute val of r] = 0.98 to > 0.99) with respect to the Lorentz-Lorentz function of the refractive index of the solvent mixture for ethyl acetate - chlorobenzene and ether - anisole mixtures.