Spin exchange interaction through phenylene-ethynylene bridge in diradicals based on iminonitroxide and nitronylnitroxide radical derivatives. 1. Experimental …

P Wautelet, J Le Moigne, V Videva…

文献索引：Wautelet, Pascale; Le Moigne, Jacques; Videva, Vladimira; Turek, Philippe Journal of Organic Chemistry, 2003 , vol. 68, # 21 p. 8025 - 8036

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被引用次数: 77

摘要

A series of bis-iminonitroxide diradical derivatives of different lengths and geometry have been prepared that incorporate a conjugated phenylene-ethynylene bridge as a rigid spacer. This paper describes the synthesis of these new components and their main characterizations. An unexpected singlet ground state and substituent effects on the singlet- triplet gap have been found for substituted “m-phenylene”-based diradicals. The effects of ...