کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10564441 970753 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Infrared spectra of phthalocyanine and naphthalocyanine in sandwich-type (na)phthalocyaninato and porphyrinato rare earth complexes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Infrared spectra of phthalocyanine and naphthalocyanine in sandwich-type (na)phthalocyaninato and porphyrinato rare earth complexes
چکیده انگلیسی
The infra-red (IR) spectroscopic data for a series of 13 heteroleptic bis(phthalocyaninato) rare earth complexes M(Pc)[Pc(OC8H17)8] [M = Y, Pr, …, Lu except Pm; H2Pc = phthalocyanine; H2Pc(OC8H17)8 = 2,3,9,10,16,17,24,25-octakis(octyloxy)phthalocyanine] have been collected with resolution of 2 cm−1. The IR spectra for M(Pc)[Pc(OC8H17)8] are more complicated than those of homoleptic bis(phthalocyaninato) rare earth counterparts M(Pc)2 and M[Pc(OC8H17)8]2 due to the decreased molecular symmetry of these double-decker compounds, C4v. For this series of heteroleptic bis(phthalocyaninato) rare earth compounds, the Pc− marker band at 1315-1322 cm−1, attributed to the pyrrole stretching, is found to be dependent on the central rare earth size, shifting slightly to the higher energy along with the decrease of rare earth radius. The coupling of isoindole deformation and aza stretching at 1057-1063 cm−1 and the coupling of pyrrole and aza stretching at 1497-1504 cm−1 are also metal-sensitive. The frequency of the vibration at 880-884 cm−1 is also dependent on the rare earth ionic size. The assignments of the vibration bands for these compounds have been made by comparison with the IR spectra of unsubstituted and in particular the 2,3,9,10,16,17,23,24-octakis(octyloxy)-substituted bis(phthalocyaninato) rare earth analogues M(Pc)2 and M[Pc(OC8H17)8]2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 39, Issue 2, 31 October 2005, Pages 186-190
نویسندگان
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