Anion Effect of Zinc Source on Chemically Deposited ZnS(O,OH) Films

Table 1

Instability constants pK of Zn complexes [15].

Decomplexation reactions of Zn(L)1	Calculation of equilibrium constant (K1) for the reaction	Instability constant of Zn complex ion pK1 = −logK1 (at 25°C)
Zn(OH)^+⟷ Zn^2+ + OH	[Zn^2+]⋅[OH^−]/[Zn(OH)^+]	4.4
Zn(NH3)^2+⟷ Zn^2+ + NH3	[Zn^2+]⋅[NH3]/[Zn(NH3)^2+]	2.2
Zn(TU)^2+⟷ Zn^2+ + TU	[Zn^2+]⋅[TU]/[Zn(TU)^2+]	0.5
Zn(SO4)^0⟷ Zn^2+ + SO4^2−	[Zn^2+]⋅[SO4^2−]/[Zn(SO4)^0]	2.3
Zn(Ac)^+⟷ Zn^2+ + Ac^−	[Zn^2+]⋅[Ac^−]/[Zn(Ac)^+]	1.6
Zn(Cl)^+⟷ Zn^2+ + CI^−	[Zn^2+]⋅[Cl^−]/[Zn(Cl)^−]	−0.5
Zn(I)^+⟷ Zn^2+ + I^−	[Zn^2+]⋅[I^−]/[Zn(l)^−]	−2.9
Zn(NO3)2⟷ Zn^2+ + 2NO^−3		Unstable compound