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Manipulation of the heme electronic structure by external stimuli and ligand field |
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| Authors: | Yoshiki Ohgo Masashi Takahashi Kazuyuki Takahashi Yukiko Namatame Hisashi Konaka Hatsumi Mori Saburo Neya Shinya Hayami Daisuke Hashizume Mikio Nakamura |
| Affiliation: | 1. Department of Chemistry, School of Medicine, Toho University, Ota-ku, Tokyo, 143-8540, Japan 2. Toho University Advanced Medical Research Center, Ota-ku, Tokyo, 143-8540, Japan 3. Division of Chemistry, Graduate School of Science, Toho University, Funabashi, Chiba, 274-8510, Japan 4. Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan 5. Rigaku Corporation, Akishima, Tokyo, 196-8666, Japan 6. Department of Physical Chemistry, Graduate School of Pharmaceutical Sciences, Chuoh-Inohana, Chiba, Chiba, 260-8675, Japan 7. Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, Kurokami, Kumamoto, 860-8555, Japan 8. Advanced Technology Support Division, RIKEN-Advanced Science Institute, Wako, Saitama, 351-0198, Japan |
| Abstract: | This review describes the switching behaviors of the electronic structure, which were observed in iron(III) porphyrinoids, by the addition of external stimuli. The combined analysis by various methods, such as EPR, M?ssbauer, SQUID, single crystal X-ray structure analysis, revealed a wide variety of electronic structures of the heme related complexes. This paper focuses in particular on the spin-crossover phenomenon in the solid state. An overview of spin-crossover phenomena found in iron(III) porphyrinoids between (i) S?= 5/2 and S?= 1/2, (ii) S?= 3/2 and S?= 1/2, (iii) S?= 5/2 and S?= 3/2, will be described. |
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