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Table 1 Uptake of O2 by the Co(II)–l-α-amino acid–imidazole systems (duration time of uptake, final value of pH, number of mmoles of O2 bound, percentage of reversibility)

From: Reversible uptake of molecular oxygen by heteroligand Co(II)–l-α-amino acid–imidazole systems: equilibrium models at full mass balance

Amac Co(II): amac:Himid (mmole ratio) Time (min) pH mmoles O2 % revers
Alanine 0.3: 0.15:0.3 90 9.882 0.0515 30.33
0.3:0.225:0.3 105 9.557 0.0559 31.25
0.3:0.3:0.3 210 9.751 0.0918 31.80
0.3:0.375:0.3 215 9.629 0.0936 46.76
0.3:0.5:0.3 215 9.562 0.1193 57.71
0.3:0.6:0.3 270 9.603 0.1343 49.68
0.3:0.75:0.3 195 9.418 0.1457 45.56
0.3:0.9:0.3 270 9.422 0.1661 46.65
0.3:1.05:0.3 200 9.276 0.1690 48.97
0.3:1.2:0.3 120 9.247 0.1704 57.72
Asparagine 0.3:0.15:0.3 210 9.498 0.0352 43.37
0.3:0.225:0.3 150 9.752 0.0567 45.04
0.3:0.3:0.3 270 9.634 0.0600 44.37
0.3:0.375:0.3 190 9.656 0.0936 49.77
0.3:0.45:0.3 150 9.543 0.0901 53.55
0.3:0.6:0.3 120 9.152 0.1219 60.78
0.3:0.75:0.3 120 8.919 0.1237 57.84
0.3:0.9:0.3 200 9.022 0.1304 65.27
0.3:1.2:0.3 180 8.616 0.1275 67.67
Histidine 0.3:0.15:0.3 90 9.668 0.0373 51.16
0.3:0.225:0.3 70 9.687 0.0565 52.85
0.3:0.3:0.3 150 9.535 0.0755 72.99
0.3:0.375:0.3 70 9.412 0.0932 68.98
0.3:0.45:0.3 150 9.732 0.1123 69.81
0.3:0.6:0.3 90 9.193 0.1496 82.63
0.3:0.75:0.3 105 9.526 0.1513 86.69
0.3:0.9:0.3 90 9.345 0.1502 85.06
0.3:1.2:0.3 90 9.234 0.1507 84.81