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Park, Yun-Heum;Lee, Min-Koo;Kim, Yong-Kweon
- Textile Coloration and Finishing
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- v.2 no.2
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- pp.7-13
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- 1990
The polyacrylonitrile (PAN)/polypyrrole (PPy) composite films have been prepaxed by exposing the PAN films containing oxidizing agent such as ferric chloride or cupric chloride to pyrrole vapor. The formation of PPy in PAN was confirmed by means of IR spectroscopy and scanning electron microscopy and the X-ray differaction study showed the amorphous structure of PPy. The breaking strength of PAN/PPy composite films was 3-5 times lower but the breaking elongation of them was 4-5 times higher than that of PAN film.
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Park, Gyeong Sun;Jeong, Seong Uk;Lee, Sim Seong;Kim, Jae Sang
- Bulletin of the Korean Chemical Society
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- v.21 no.9
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- pp.909-912
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- 2000
Thallium(I) selective electrodes based on meso-alkyl substituted calix[4]pyrroles such as, meso-octamethyl-calix[4]pyrrole (L1), meso-octaethylcalix[4]pyrrole (L2) and meso-tetraspirocyclohexylcalix[4]pyrrole (L3) as sensor molecules have been pre pared and tested. The conditioned electrode (E4) incorporating L3gave best results with a wide working concentration range of 10-5.5 ~10-1 M near-Nernstian slope of 56.0 mV/decade of activity and detection limit of 10-6.0 M. This electrode exhibited a fast response time of 30 s and high selectivity over Na+ , K+ and other metal ions with only Ag+ interfering. The electrode works well in the pH range 2.0-11.0 and can be successfully employed for the determination of Tl+.This proposed electrode was also used as an indicator electrode in potentiometric titration of Tl+.
https://doi.org/10.5012/bkcs.2000.21.9.909 인용 PDF

Oh, Ju Hyun;Lee, Joon Hwa;Kim, Sung Kuk
- Journal of the Korean Magnetic Resonance Society
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- v.25 no.4
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- pp.45-50
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- 2021
A calix[4]pyrrole (1) bearing a quaternary ammonium pendant via its meso phenoxy linker has been synthesized as the bromide salt form. It was revealed by ¹H NMR spectroscopic analyses performed in DMSO-d₆ that receptor 1 binds F^- with high affinity and selectivity over other halide anions. The binding of receptor 1•Br^- with F^- and Cltakes place by anion metathesis with the anions including F^- and Cl^-.
https://doi.org/10.6564/JKMRS.2021.25.4.045 인용 PDF KSCI

Bae, Ki-Hwan;Seo, Won-Jun
- YAKHAK HOEJI
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- v.38 no.1
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- pp.86-90
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- 1994
7,8-Dioxo-A-norerythrinan (A) was synthesized from acid catalyzed cyclization of 6a-hydroxv-1-(2-phenylethyl)-octahydrocyclo-penta[b] pyrrole-3a-carboxylic acid ethyl ester (B) with concomitant deethoxycarbonylation. The intermediate (B) was a hydroxylated compound of N-acyliminium (C). The unstable pyrrolinium (C) was prepared from oxalylation of the enamine of phenethylamine and ethyl 2-oxocyclopentanecarboxylate.
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