[Study on the synthesis and spectra of 2-thenoyl-2-carbazolyl-N-butyltrifluoroacetone].

In phene-50% NaOH medium, 1,4-dibromobutane reacts with carbazole (CZ) to form N-bromobutylcarbaole (BCZ) at 70-80 degrees C. The 2-thenoyl-2-carbazolyl-N-butyltrifluoroacetone (TCBTA) was synthesized by reaction of BCZ with 2-thenoyltrifluoroacetone (TTA) in acetone-K2CO3 medium at 50 degrees C. The TCBTA is a light brown crystal with m.p. of 211-214 degrees C. The structure of the synthesized TCBTA was characterized by UV, IR and GC/MS, and the UV and IR spectra of CZ, BCZ and TTA have been studied. In chloroform, TCBTA has three maximum absorptions at 241, 265 and 295 nm whose molar absorptivity is 1.88 x 10(5), 1.25 x 10(5) and 1.08 x 10(5) L x mol(-1) x cm(-1), respectively. Extraction rate of iron(III) and neodymium(III) by TCBTA in chloroform rises by 3 and 1.6 times compared with TTA. The fluorescence of TCBTA-Nd(III) complex is 5 times higher than TTA-Nd(III) complex. It was shown that TCBTA has excellent photosensitivity.