Investigation of Some Ion Selective and Water Repellent Properties of Carbazole Based Polymers

Abstract

A polymer derived from poly-9-bis [4-(thiophen-3,4-yloxy)biphenyl)]-9H-carbazole containing a carbazole and thiophene group, abbreviated as B2, was synthesized via the oxidation method by using FeCl3 as an oxidant. Additionally, P(B2) was synthesized and coated onto an ITO-glass surface via electrochemical oxidative polymerization. UV spectra of these polymers and their metal complexes (like Fe 2+ , Cd 2+ , Hg 2+ , Pb 2+ ) were recorded in DMSO solutions, and then their UV spectra depending on the concentration were recorded. According to the results, when the concentration was rising, the absorbance peak intensity increased gradually for B2. Also, for P(B2), the absorbance peak followed a fluctuating course. The photo images of its some metal complexes were recorded under UV light. Resultantly, B2 polymer was determined to be selective against Fe 2+ ion and it can be said that B2 could be used as fluorescence Fe 2+ ion probe. Finally, contact angle (CA) measurements of B2 and P(B2) were realized and, according to the recorded photo images it can be said that B2 had more hydrophobic property than P(B2).