SOLUBLE POLYSTYRENE DERIVATIVES OF METAL BIS(3,4-DICARBOXYBENZOYL)PHTHALOCYANINATES - SYNTHESIS, THERMAL-ANALYSIS, AND SENSITIVITY TOWARDS TOXIC GASES

Polystyrene-bound metal [2,9 or 2, 1 0 (or 2,16 or 2,17) bis(3,4-dicar boxybenzoyl)] phthalocyaninates were synthesized by Friedel-Crafts rea ction of polystyrene with the corresponding metal phthalocyaninates. C o(II) and Cu(II) [2,9 or 2,10 (or 2,16 or 2,17) bis(3,4-dicarboxybenzo yl)]phthalocyaninate (PS-CodaPc and PS-CudaPc) contained 0, 13 mmol . g-1 (12,4 wt.-%) and 0, 13 mmol . g-1 (12,8 wt.-%) of CodaPc and CudaP c, respectively. They were soluble in N,N'-dimethylformamide, but only partially soluble in chloroform, tetrahydrofuran (THF), dimethyl sulf oxide, N-methyl-2-pyrrolidone, and pyridine. The THF extracts containe d 0,12 mmol . g-1 (11,4 wt.-%) and 0,18 mmol . g-1 (17,2 wt.-%) of PS- CodaPc and PS-CudaPc, respectively. The thermal stability of the polym ers was studied using thermogravimetric and differential thermal analy sis in nitrogen and synthetic air atmosphere. The contents of MdaPc (M : metal) in THF-extracted polymers calculated from the data of residue in thermogravimetric analysis are 0, 12 mmol . g-1 for PS-CodaPc and 0, 19 mmol . g-1 for PS-CudaPc. In addition, the sensitive properties of the polymers towards toxic gases were also investigated by quartz m icrobalance transducers. The results show that the quartz microbalance sensors coated with both polymers were sensitive to NO2 and chlorinat ed hydrocarbons, i.e. chloroform and perchloroethylene.The sensitivity to NO2 was 6,53 . 10(-7) m3 . mL-1 . s-1 for PS-CodaPc and 1,90 . 10( -6) m3 . mL-1 . s-1 for PS-CudaPc, and that to chloroform and perchlor oethylene was 2,33 . 10(-8) and 4,60 . 10(-8) m3 . mL-1 . s-1, respect ively, for PS-CodaPc and 4,79 . 10(-8) and 9,51 . 10(-7) m3 . mL-1 . s -1 for PS-CudaPc.