Role of Active Complexes of Selected Thiopurine Derivatives …
529
Tables 1 a, b
Potential of zero-charge E
z versus Ag/AgCl electrode and surface tension
γ z for E
z of 2 mol
: dm −3
chlorates(VII) solutions
+ 1
: 10 −3
mol
: dm −3
thiopurines
+ different surfactants concentration systems
a
1
: 10 −3
mol
: dm −3
thiopurine
+
10 6
c
TritonX-100 /mol
: dm −3
0
6-mercaptopurine
6-thioguanine
Azathioprine
−E z /V
γ z /mN · m −1
−E z /V
γ z /mN · m −1
−E z /V
γ z /mN · m −1
−E z /V
γ z /mN · m −1
0
0.483
478.8
0.478
462.8
0.516
470.1
0.291
465.5
10
0.484
475.9
0.473
446.9
0.469
467.3
0.291
465.0
20
0.483
470.0
0.472
426.3
0.463
463.0
0.291
464.7
50
0.482
460.9
0.470
402.0
0.430
440.7
0.290
464.0
100
0.473
419.8
0.463
396.4
0.415
418.0
0.290
463.5
b
1
: 10 −3
mol
: dm −3
thiopurine
+
10 6
c
Tween80 /mol
: dm −3
0
6-mercaptopurine
6-thioguanine
Azathioprine
−E z /V
γ z /mN · m −1
−E z /V
γ z /mN · m −1
−E z /V
γ z /mN · m −1
−E z /V
γ z /mN · m −1
0
0.483
478.8
0.478
462.8
0.516
470.1
0.291
465.5
10
0.484
475.9
0.469
463.6
0.438
450.8
0.290
464.0
20
0.483
470.0
0.466
458.0
0.425
447.8
0.285
463.0
50
0.482
460.9
0.466
434.7
0.388
430.6
0.282
462.0
100
0.473
419.8
0.460
399.2
0.379
425.0
0.273
460.0