Infrared spectroscopic characteristics of octa-substituted bis(phthalocyaninato) rare earth complexes peripherally substituted with (4-methoxy)phenoxy derivatives.
The infrared (IR) spectroscopic data for a series of 15 rare earth double-deckers M[Pc(MeOPhO)(8)](2) [M=Y, La, ..., Lu, except Pm; H(2)Pc=2, 3, 9, 10, 16, 17, 23, 24-octakis(4-methoxyphenoxy)phthalocyanine] with tervalent rare earths M(III)[Pc(MeOPhO)(8)](2) (M=Y, La, ..., Lu except Ce and Pm) and intermediate-valent cerium Ce[Pc(MeOPhO)(8)](2) have been collected with resolution of 2cm(-1). For M(III)[Pc(MeOPhO)(8)](2), typical IR marker band of the monoradical anion Pc(MeOPhO)(8)(-) shows characteristic absorption band whose frequency linearly varies in the range from 1,313 cm(-1) as a weak band for La[Pc(MeOPhO)(8)](2) to 1,324 cm(-1) as a medium band for Lu[Pc(MeOPhO)(8)](2) along with the decrease of rare earth ionic size. For Ce[Pc(MeOPhO)(8)](2), a weak band at 1,324 cm(-1) with contribution from pyrrole stretching was the marker IR band of phthalocyanine dianion Pc(2-). In conclusion, all the metal size-dependent IR absorptions should be contributed primarily from the vibrations of pyrrole, isoindole stretching, breathing or deformation or aza stretching of the Pc ring.
Lu
Fanli
F
Department of Chemistry, School of Sciences, Tianjin University, Tianjin 300072, PR China. fanlilu@tju.edu.cn
Cui
Jianzhong
J
Yan
Xiuru
X
D000042:Absorption; D001965:Bromides / Q000737:chemistry; D019281:Dimerization; D004583:Electrons; D007211:Indoles / Q000737:chemistry*; D007477:Ions; D054833:Isoindoles; D008670:Metals; D008674:Metals, Rare Earth / Q000737:chemistry*; D008956:Models, Chemical; D017680:Potassium Compounds / Q000737:chemistry; D011758:Pyrroles / Q000737:chemistry; D013053:Spectrophotometry; D013055:Spectrophotometry, Infrared / Q000379:methods*
D001965:Bromides; D007211:Indoles; D007477:Ions; D054833:Isoindoles; D008670:Metals; D008674:Metals, Rare Earth; D017680:Potassium Compounds; D011758:Pyrroles; C039004:potassium bromide; C013647:phthalocyanine