Karbazol Esaslı Polimerlerin Bazı İyon Seçici ve Su İtici Özelliklerinin İncelenmesi

Öz

Yapısında bir karbazol ve tiyofen grubu içeren B2 olarak kısaltılan poli-9-bis[4-(tiyofen-3,4-iloksi)bifenil)]-9H-karbazol’den türetilen yeni bir polimer oksidan olarak FeCl3’ ün kullanılmasıyla oksidasyon metoduyla sentezlendi. İlave olarak, P(B2) sentezlendi ve elektrokimyasal oksidatif polimerizasyonla ITO cam yüzeyi üzerine kaplandı. Bu polimerlerin ve onların (Fe+2, Cd+2, Hg+2, Pb+2 gibi) metal komplekslerinin UV spektrumları DMSO çözeltilerinde kaydedildi, ve daha sonra onların konsantrasyona dayalı UV spektrumları kaydedildi. Sonuçlara göre B2 için konsantrasyon arttığında absorbans pik şiddeti kademeli olarak artmaktadır. Ayrıca, P(B2) için de absorbans piki dalgalı bir seyir izlemektedir. Bazı metal komplekslerinin fotoğraf görüntüleri UV ışığı altında kaydedildi. Sonuç olarak, B2 polimerinin Fe+2 iyonuna karşı seçici olduğu belirlendi ve B2’ nin floresan Fe+2 iyon probu olarak kullanılabileceği söylenebilir. Son olarak B2 ve P(B2)’ nin temas açısı (CA) ölçümleri yapılmış ve kaydedilen fotoğraf görüntülerine göre B2’nin P(B2)’den daha fazla hidrofobik özelliğe sahip olduğu söylenebilir.

Anahtar Kelimeler

• Elektrokimyasal polimerizasyon
• karbazol
• tiyofen
• kontak açısı
• metal kompleks

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

Öz

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 Fe2+, Cd2+, Hg2+, Pb2+) 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 Fe2+ ion and it can be said that B2 could be used as fluorescence Fe2+ 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).

Anahtar Kelimeler

• electrochemical polymerization
• carbazole
• thiophene
• contact angle
• metal complex

Kaynakça

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