Distinguishing polymorphs of the semiconducting pigment copper phthalocyanine by solid-state NMR and Raman spectroscopy.
Distinguishing polymorphs of the semiconducting pigment copper phthalocyanine by solid-state NMR and Raman spectroscopy.
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DOI:
10.1021/jp9061412
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发表时间:
2010-04-08
期刊:
影响因子:
--
通讯作者:
Ishii Y
中科院分区:
文献类型:
--
作者:
Shaibat MA;Casabianca LB;Siberio-Pérez DY;Matzger AJ;Ishii Y
Cu(II)(phthalocyanine) (CuPc) is broadly utilized as an archetypal molecular semiconductor and is the most widely used blue printing pigment. CuPc crystallizes in six different forms; the chemical and physical properties are substantially modulated by its molecular packing among these polymorphs. Despite the growing importance of this system, spectroscopic identification of different polymorphs for CuPc has posed difficulties. This study presents the first example of spectroscopic distinction of α- and β-forms of CuPc, the most widely used polymorphs, by solid-state NMR (SSNMR) and Raman spectroscopy. 13C high-resolution SSNMR spectra of α- and β-CuPc using very-fast magic angle spinning (VFMAS) at 20 kHz show that hyperfine shifts sensitively reflect polymorphs of CuPc. The experimental results were confirmed by ab initio chemical shift calculations. 13C and 1H SSNMR relaxation times of α- and β-CuPc under VFMAS also showed marked differences, presumably because of the difference in electronic spin correlation times in the two forms. Raman spectroscopy also provided another reliable method of differentiation between the two polymorphs.
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影响因子:
15
作者:
Middleton, DA;Le Duff, CS;Saunders, D
通讯作者:
Saunders, D
影响因子:
15
作者:
Shaibat, Medhat A.;Casabianca, Leah B.;Ishii, Yoshitaka
通讯作者:
Ishii, Yoshitaka
影响因子:
15
作者:
Ishii, Y;Wickramasinghe, NP;Chimon, S
通讯作者:
Chimon, S
DOI:
10.1039/j19680002488
发表时间:
1968-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY A -INORGANIC PHYSICAL THEORETICAL
影响因子:
--
作者:
BROWN, CJ
通讯作者:
BROWN, CJ
影响因子:
--
作者:
GREINER, SP;ROWLANDS, DL;KREILICK, RW
通讯作者:
KREILICK, RW