Raman spectroscopic characteristics of phthalocyanine and naphthalocyaninein sandwich-type (na)phthalocyaninato and porphyrinato rare earth complexes - Part 2. The effects of different excitation wavelengths

The resonance or near-resonance Raman spectroscopic data in the range of 50 0-1800 cm(-1) of a series of nineteen naphthalocyaninato (Nc). phthalocyani nato (Pc) and/or porphyrinato (Por) rare earth sandwich complexes including double-deckers M[Pc(OC8H17)(8)](2) (M = Nd, Ce, Eu, Er), M(Nc*)(2) [M = Pr , Nd. Eu: Nc* = Nc(Bu-t)(4), Nc(SC12H25)(s)]. M(Por)(Nc) {M = La. Pr, Eu, G d; Por = meso-tetrakis(4-t-butylphenyl)porphyrin [T(4-Bu-t)PP], meso-tetrak is(4-chlorophenyl)porphyrin [T(4-Cl)PP]}, Ce(Por)(Pc) [Por = meso-tetrakis( 4-pqridyl)porphyrin (TPyP)], and triple-deckers Eu(Pc)Eu(Pc*)Eu(Pc*) [Pc* = Pc(OC8H17)(8)]. M-2(Por)(2)(Pc) [M = Ce, Sm, Eu, Por = meso-tetraphenylpor phyrin (TPP), TPyP. T(4-'Bu)PP], and Eu-2(Por)(Pc)(2) [Por = T(4-Cl)PP, T(4 -'Bu)PP] have been studied systematically using laser excitation sources em itting at 457.9, 488.0, 514.5 or 647.1 nm, The resonance Raman characterist ics for unsubstituted and substituted (na)phthalocyaninato mono-radical ani ons Pc.-. Nc*(.-) and dianions Pc2- are thus described comparatively under a variety of conditions. The intense band at ca. 1491-1524 cm(-1) attribute d to both pyrrole C=C and C=N aza group stretches was confirmed to be the m arker band fur Pc.- and Pc2- anions. (C) 2001 Elsevier Science B.V, All rig hts reserved.