STRUCTURE AND POLYMERIZATION BEHAVIOR OF CADMIUM 10,12-PENTACOSADIYNOATE LANGMUIR-BLODGETT-FILMS

Two different types of Y-films (a Y-film from Z-type deposition and a Y-film from Y-type deposition) have been observed during the Langmuir- Blodgett (LB) film deposition of metal diynoates, but their structural characterisation has not received much attention. In the present work , a study of LB film deposition of cadmium 10,12-pentacosadiynoate, fo r evaluating the effects of monolayer aging and concentration of sprea ding solution, has been carried out and three different types of Y-fil ms of cadmium 10,12-pentacosadiynoate have been obtained. Structural c haracterisation and study of the topochemical polymerisation of differ ent types of films show remarkably large differences in their bilayer spacing and diacetylene polymerisation behaviour. This study shows tha t Y-films obtained by overturning in the Z-type buildup process are st ructurally quite different from the Y-films obtained from the Y-type b uild-up process.