2001年8月
Molecularly imprinted polymers with metalloporphyrin-based molecular recognition sites coassembled with methacrylic acid
ANALYTICAL CHEMISTRY
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- 巻
- 73
- 号
- 16
- 開始ページ
- 3869
- 終了ページ
- 3874
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1021/ac010278p
- 出版者・発行元
- AMER CHEMICAL SOC
A diastereoselective molecularly imprinted polymer (MIP) for (-)-cinchonidine, PPM(CD), was prepared by the combined use of methacrylic acid and vinyl-substituted zinc(II) porphyrin as functional monomers. Compared to MIPS using only methacrylic acid or zinc porphyrin as a functional monomer, PM(CD) and PP(CD), respectively, PPM(CD) showed higher binding ability for (-)-cinchonidine in chromatographic tests using the MIP-packed columns. Scatchard analysis gave a higher association constant of PPM(CD) for (-)-cinchonidine (1.14 x 10(7) M-1) than those of PP(CD) (1.45 x 10(6) M-1) and PM(CD) (6.78 x 106 M-1). The affinity distribution of binding sites estimated by affinity spectrum analysis showed a higher percentage of high-affinity sites and a lower percentage of low-affinity sites in PPM(CD). The MIPs containing a zinc(II) porphyrin in the binding sites, PPM(CD) and PP(CD), showed fluorescence quenching according to the binding of (-)-cinchonidine, and the quenching was significant in the low-concentration range, suggesting that the high-affinity binding sites contain the porphyrin residue. The correlation of the relative fluorescence intensity against log of (-)-cinchonidine concentrations showed a linear relationship. These results revealed that the MIP having highly specific binding sites was assembled by the two functional monomers, vinyl-substituted zinc(II) porphyrin and methacrylic acid, and they cooperatively worked to yield the specific binding. In addition, the zinc(II) porphyrin-based MIPs appeared to act as fluorescence sensor selectively responded by binding events of the template molecule.
- リンク情報
- ID情報
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- DOI : 10.1021/ac010278p
- ISSN : 0003-2700
- Web of Science ID : WOS:000170482800011