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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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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, â¦, 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 cmâ1. 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 Pcâ marker band at 1315-1322 cmâ1, 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 cmâ1 and the coupling of pyrrole and aza stretching at 1497-1504 cmâ1 are also metal-sensitive. The frequency of the vibration at 880-884 cmâ1 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
Journal: Vibrational Spectroscopy - Volume 39, Issue 2, 31 October 2005, Pages 186-190
نویسندگان
Wei Su, Meng Bao, Jianzhuang Jiang,