完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | Ho, I-Ting | en_US |
dc.contributor.author | Haung, Kuan-Chang | en_US |
dc.contributor.author | Chung, Wen-Sheng | en_US |
dc.date.accessioned | 2014-12-08T15:20:43Z | - |
dc.date.available | 2014-12-08T15:20:43Z | - |
dc.date.issued | 2011-10-04 | en_US |
dc.identifier.issn | 1861-4728 | en_US |
dc.identifier.uri | http://dx.doi.org/10.1002/asia.201100023 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/14747 | - |
dc.description.abstract | A novel 1,3-alternate calix[4]arene L, containing two different cationic binding sites of bis-triazoles and bis-enaminone groups, was synthesized and shown to be a homobinuclear ditopic fluorescent chemosensor for Ag(+) ions. The fluorescence intensity of L was selectively enhanced by binding with Ag(+) ions in methanol/chloroform (49:1, v/v) cosolvent. In the presence of most competing metal ions, L retains its selectivity toward Ag(+) ion. The binding constants K(1) and K(2) of the successive complexation of L with the first and second Ag(+) ions were calculated to be 4.46 x 10(3) and 9.20 x 10(4)M(-1), respectively. The higher K(2) value revealed that a positive allosteric effect participated in the complexation of L with the second equivalent of Ag(+). Based on (1)H NMR titration results, we inferred that the two distal bis-enaminone and bis-triazole groups on L cooperatively coordinated to Ag(+) ions with the help of cation-pi interactions from the phenoxy rings. Furthermore, the ESI-MS spectrometry clearly proved the formation of the homobinuclear complex L center dot(Ag(+))(2), because a base peak at m/z of 750.1701 was detected and its isotope pattern was in excellent agreement with the calculated one. | en_US |
dc.language.iso | en_US | en_US |
dc.title | 1,3-Alternate Calix[4]arene as a Homobinuclear Ditopic Fluorescent Chemosensor for Ag(+) Ions | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1002/asia.201100023 | en_US |
dc.identifier.journal | CHEMISTRY-AN ASIAN JOURNAL | en_US |
dc.citation.volume | 6 | en_US |
dc.citation.issue | 10 | en_US |
dc.citation.spage | 2738 | en_US |
dc.citation.epage | 2746 | en_US |
dc.contributor.department | 應用化學系 | zh_TW |
dc.contributor.department | Department of Applied Chemistry | en_US |
顯示於類別: | 期刊論文 |