The effect of protonation on the spectra and stabilities of alkoxyl substituted phthalocyaninatometals
摘要:
The protonation abilities of phthalocyaninatometals (MPcs) increase but their stabilities reduce by the introduction of alkoxyl substituents at alpha position. In the toluene, the order of mono-protonation rate for the tetra-alpha-(2, 2, 4-trimethyl-3-pentoxy)phthalocyaninatometals sorts with the center metals is Zn > Co > Cu > Ni > Fe, which is opposite to the order of their wavelength difference between the Q bands and X bands. However, their mono-protonated species can be decomposed easily at the rate order FePc > CoPc > CuPc > NiPc > ZnPc, analogous to their decomposition abilities in the benzoylperoxide (BPO) oxidation. In addition, it is interesting that a more remarkable decomposition is found when partial CuPc was mono-protonated. (C) 2008 Elsevier B.V. All rights reserved.
Spectra and stabilities of α-substituted phthalocyaninatoirons
摘要:
Three aryloxy (alkoxy) alpha-substituted phthalocyaninatoirons (FePcs) were prepared and their UV-vis spectra in air or by adding of peroxide showed a new band at the red side of the Q band which can be assigned to a complexes of phthalocyaninatoirons with oxygen or peroxide. The appearance of this band related to the instability of these FePcs so their decomposition was also studied, by the benzoylperoxide oxidation. (c) 2006 Elsevier B.V. All rights reserved.