Synthesis and Effectively Reversible Oxygenation of Some "Picket Fence" Type Porphyrinatocobalt(II) Complexes
Some "picket fence" type meso -tetrakis(2-substitu-ted phenyl)porphyrinatocobalt(II) complexes were newly synthesized, which had different peripheral substituents in their numbers and/or geometrical dispositions to form "cavity" on the porphyrin plane. Their O 2 affinities were d...
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| Veröffentlicht in: | Synthesis and reactivity in inorganic and metal-organic chemistry 1983-01, Vol.13 (6), p.761-780 |
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| container_issue | 6 |
| container_start_page | 761 |
| container_title | Synthesis and reactivity in inorganic and metal-organic chemistry |
| container_volume | 13 |
| creator | Imai, Hiroyasu Nakata, Keiko Nakatsubo, Akiko Nakagawa, Shigeo Uemori, Yoshio Kyuno, Eishin |
| description | Some "picket fence" type
meso
-tetrakis(2-substitu-ted phenyl)porphyrinatocobalt(II) complexes were newly synthesized, which had different peripheral substituents in their numbers and/or geometrical dispositions to form "cavity" on the porphyrin plane. Their O
2
affinities were determined with 1-methylimidazole as an axial base at various temperatures in solution, by visible spectral measurements. On the basis of thermodynamic quantities, four neopentylcarbonylamino groups were the most effective as a picket fence, and the thermodynamic values of the complex were nearly comparable to those of cobalt(II)myoglobin. It was found that O
2
affinity decreased with an increase in ΔH°, regardless of ΔS°. In the case of using various amines as an axial base, imidazoles were effective to enhance O
2
affinity rather than pyridines. |
| doi_str_mv | 10.1080/00945718308055883 |
| format | Article |
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meso
-tetrakis(2-substitu-ted phenyl)porphyrinatocobalt(II) complexes were newly synthesized, which had different peripheral substituents in their numbers and/or geometrical dispositions to form "cavity" on the porphyrin plane. Their O
2
affinities were determined with 1-methylimidazole as an axial base at various temperatures in solution, by visible spectral measurements. On the basis of thermodynamic quantities, four neopentylcarbonylamino groups were the most effective as a picket fence, and the thermodynamic values of the complex were nearly comparable to those of cobalt(II)myoglobin. It was found that O
2
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2
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meso
-tetrakis(2-substitu-ted phenyl)porphyrinatocobalt(II) complexes were newly synthesized, which had different peripheral substituents in their numbers and/or geometrical dispositions to form "cavity" on the porphyrin plane. Their O
2
affinities were determined with 1-methylimidazole as an axial base at various temperatures in solution, by visible spectral measurements. On the basis of thermodynamic quantities, four neopentylcarbonylamino groups were the most effective as a picket fence, and the thermodynamic values of the complex were nearly comparable to those of cobalt(II)myoglobin. It was found that O
2
affinity decreased with an increase in ΔH°, regardless of ΔS°. In the case of using various amines as an axial base, imidazoles were effective to enhance O
2
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meso
-tetrakis(2-substitu-ted phenyl)porphyrinatocobalt(II) complexes were newly synthesized, which had different peripheral substituents in their numbers and/or geometrical dispositions to form "cavity" on the porphyrin plane. Their O
2
affinities were determined with 1-methylimidazole as an axial base at various temperatures in solution, by visible spectral measurements. On the basis of thermodynamic quantities, four neopentylcarbonylamino groups were the most effective as a picket fence, and the thermodynamic values of the complex were nearly comparable to those of cobalt(II)myoglobin. It was found that O
2
affinity decreased with an increase in ΔH°, regardless of ΔS°. In the case of using various amines as an axial base, imidazoles were effective to enhance O
2
affinity rather than pyridines.</abstract><pub>Taylor & Francis Group</pub><doi>10.1080/00945718308055883</doi><tpages>20</tpages></addata></record> |
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| source | Taylor & Francis:Master (3349 titles) |
| title | Synthesis and Effectively Reversible Oxygenation of Some "Picket Fence" Type Porphyrinatocobalt(II) Complexes |
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