TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): The preparation (I) comprises adding diamine and dialdehyde monomers in a mol ratio of 1:0.99-1.01 in to three-necked bottle provided with stirrer, adding anhydrous calcium chloride or anhydrous lithium chloride catalyst, where mass ratio of catalyst and monomer is 0.023:1, adding anhydrous N-methylpyrrolidone, dimethylformamide or dimethylacetamide solvent, where the solid content is 10-15 wt.%, stirring, boiling to 20 degrees C and reacting under nitrogen gas protection for 24-48 hours, discharging into absolute ethanol, extracting the obtained solid for 12-24 hours with ethanol, vacuum drying at 50-70 degrees C for 7-9 hours. Preferred Components: (I) is N-(4-(iminomethyl)benzylidene)-N'-(4-methoxyphenyl)-N'-phenylbenzene-1,4-diamine compound of formula (II), N-(3-(iminomethyl)benzylidene)-N'-(4-methoxyphenyl)-N'-phenylbenzene-1,4-diamine compound of formula (III), N-((5-(iminomethyl)thiophen-2-yl)methylene)-N'-(4-methoxyphenyl)-N'-phenylbenzene-1,4-diamine compound of formula (IV), N-(3,5-bis(trifluoromethyl)phenyl)-N'-(4-(iminomethyl)benzylidene)-N-phenylbenzene-1,4-diamine compound of formula (V), N-(3,5-bis(trifluoromethyl)phenyl)-N'-(3-(iminomethyl)benzylidene)-N-phenylbenzene-1,4-diamine compound of formula (VI), N-(3,5-bis(trifluoromethyl)phenyl)-N'-((5-(iminomethyl)thiophen-2-yl)methylene)-N-phenylbenzene-1,4-diamine compound of formula (VII), N-(4-(9H-carbazol-9-yl)phenyl)-N'-(4-(iminomethyl)benzylidene)-N-phenylbenzene-1,4-diamine compound of formula (VIII) or N-(4-(9H-carbazol-9-yl)phenyl)-N'-((5-(iminomethyl)thiophen-2-yl)methylene)-N-phenylbenzene-1,4-diamine compound of formula (IX). (I) to prepared into single layer device and hole mobility is measured by using time-of-flight method. The hole mobility is 1.09 x 10-4 to 4.77 x 10-4 cm2V-1second-1. The diamine monomer is N,N-bis(4-aminophenyl)-4 methoxy aniline, N,N-bis(4-aminophenyl)-3,5-bis(trifluoromethyl)aniline or 4,4'- diamino-4''-N-carbazolyl triarylamine. The dialdehyde monomer is terephthalaldehyde, isophthalic aldehyde or thiophene-2,5-dicarbaldehyde. The reaction temperature is 20-60 degrees C.