Magnetic behavior of polycarbosilazane ?FeII, ?FeIII and mixed‐valence ?FeII–III chloride metallopolymers |
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| Authors: | Yaqoub Ali Hamam Hasan Moh'd El Ghanem Issam Mahmoud Arafa Moh'd Rida Said Ibrahim Abo aljarayish |
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| Affiliation: | 1. Physics Department, Yarmouk University, 211‐63 Irbid, Jordan;2. Department of Physics, Faculty of Science and Arts, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, JordanDepartment of Physics, Faculty of Science and Arts, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan;3. Department of Applied Chemistry, Faculty of Science and Arts, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan |
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| Abstract: | FeII, FeIII and mixed‐valence FeII–III chlorides were reacted with poly[N,N′‐bis(dimethylsilyl)ethylenedi‐ amine], [? Si(CH3)2NHCH2CH2NH? ]n, to form the corresponding Fe‐polycarbosilazane macromolecular complexes. The average chain–chain spacing in these materials was estimated from X‐ray diffraction data and found to be 6.94, 7.29, 7.30 and 7.45 Å in metal‐free and FeII? , FeIII? and FeII–III‐containing polycarbosilazanes, respectively. This demonstrates that FeII, FeIII and FeII–III chlorides are encapsulated between the polycarbosilazane chains. The chain–chain expansions in the divalent FeII and trivalent FeIII chloride macromolecular complexes are comparable, but less than that in the FeII–III chloride analog, which suggests that different chain–chain packings exist in the mixed‐valence macromolecular complex. The magnetic properties of the resulting complexes were investigated by measuring the magnetization in magnetic fields up to 8 kOe and in the temperature range from liquid nitrogen temperature to room temperature. Copyright © 2007 Society of Chemical Industry |
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| Keywords: | magnetization magnetic polymer iron‐polycarbosilazane complex organosilicon polymer metallopolymer macromolecular iron complex |
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