Synthesis and magnetic properties of an annulated dinuclear copper(II) phthalocyanine peripherally having 2,6-dimethylphenoxy substituents
| Autor: | Masahiro Mikuriya, Takahisa Ikeue, Makoto Handa, Masayuki Koikawa, Naomi Matsumoto, Ichiro Hiromitsu, Yusuke Kataoka, Naoko Sawada, Tamotsu Sugimori, Ayaka Miyazaki, Katsumi Yoshino |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Journal of Porphyrins and Phthalocyanines. 18:708-714 |
| ISSN: | 1099-1409 1088-4246 |
| Popis: | A dinuclear copper(II) phthalocyanine complex with 12 2,6-dimethylphenoxyl groups at the peripheral positions of the [ CuPc ]2 framework, where [ CuPc ] units are linked by a common annulated benzene ring to give the planar dinuclear structure, was prepared and characterized. The introduced bulky 2,6-dimethylphenoxyl groups were revealed to effectively suppress the aggregation of the dinuclear complex in the toluene solution, showing a considerably red-shifted Q-band at 838 nm. The EPR spectrum (measured in the frozen toluene solution at 15 K) and temperature-dependent magnetic moment indicated the existence of antiferromagnetic interaction between the copper(II) ions. The exchange integral J was estimated to be -1.8 cm-1 using Bleaney Bowers equation for the S1 = S2 = 1/2 system. The long-range interaction ( Cu – Cu distance = 10.7 Å) through the common annulated benzene ring between two [ CuPc ] units was confirmed by the DFT calculation result. |
| Databáze: | OpenAIRE |
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