化学
抗磁性
辐照
热稳定性
分子
吸收(声学)
金属
结晶学
酞菁
吸收光谱法
顺磁性
电子顺磁共振
谱线
离子
红外光谱学
核磁共振
材料科学
物理
有机化学
量子力学
天文
磁场
核物理学
复合材料
作者
JF Boas,P. E. Fielding,AG MacKay
摘要
The phthalocyanine (pc) complexes of a number of metals have been prepared. The e.p.r. spectra of the paramagnetic pc complexes (VO2+, Cr2+, Mn2+, Co2+, Cu2+, Mo2+) show metal ion resonances, while those of the diamagnetic pc complexes (H22+, Na22+, Mg2+, Ni2+, Zn2+, Pd2+, Cd2+, Sn2+, Pt2+ and Pb2+) generally give free spin resonances with g ≈ 2.003 and line widths less than 1 mT. The preparative conditions have been shown to affect the free spin concentration in H2(pc). Irradiation also affects the e.p.r. signal intensity in H2(pc), Zn(pc) and Ni(pc), and there are also changes in the near-infrared spectra of most pc complexes. The results are due to the presence of two types of defect, the first arising from decomposition during crystal growth and the second arising from a possible local disorder in the crystals which is produced by γ-irradiation. The latter may be due to a cross-linking of adjacent pc molecules. Oxygen absorption does not seem to be the major factor in the origin of the free spin resonances.
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