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¸÷λ´óÉñ£¬£¬Ë±È½Ï¶®EPR²âÊÔÖеÄÎÊÌâÄØ£¿ÎÄÕÂÉó¸åÒâ¼û»ØÀ´ÁË£¬Ìá³öÁ˼¸¸öÌØ±ðÄѲøµÄÎÊÌ⣬ϣÍû°ïÎÒ¿´Ò»Ï£¬£¬Õâ¸öÄÑÌâÈçºÎ½â£¬Ð»Ð»ÄØ£¬£¬½ð±Ò½ð±ÒºóÐø»¹ÓÐŶ£¬1. About EPR spectra. A weak and broad EPR signal (g =2.12) may be attributed to generation of NH radicals and synergetic effect of copper ions, which seems to be incorrect. Firstly, EPR signal for radicals were always around g = 2.00 with small linewidth (about 20 Gauss). Secondly, radicals may be generated in N atoms of pyridine, such as viologen redical (Angew. Chem. Int. Ed. 2007, 46, 3249 ¨C3251). Thirdly, no evidence for appearance of mixed copper valence of 1P was found. Fourthly, whether impurities or vacancy factor lead to unusual EPR signal. |
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