Abstract: This invention relates to compounds of general formula (R?)xZny(L)z(A)n(XR)m, where L is a bi- or multifunctional organic neutral ligand or its deprotonated form, containing at least two heteroatoms selected from N, O, S, wherein at least one of the functional groups of the ligand is selected from —OH, —SH, —NH2, —NHR, —COOH, —CONH2, —CONRH or their deprotonated equivalents; A is an inorganic anion, X is oxygen or sulfur, R? is C1-C10 alkyl, straight or branched, benzyl, phenyl cyclohexyl or halogen, R is hydrogen, alkyl or aryl, x is a number from 0 to 6, y is a number from 1 to 12, z is a number from 1 to 12, n is a number from 0 to 6, m is a number from 0 to 6, wherein x?0, n?0 and m?0 at the same time and if n and m=0, then x?z. The invention also relates to the method of preparation of these compounds and applications thereof.