摘要
A bis-propargyl-appended rhodamine B-based receptor BPRB has been synthesised that exhibits pronounced fluorescence enhancement in the presence of Pd2+ ions. The addition of Pd2+ enhanced the fluorescence intensity of BPRB by 113-fold (Φf = 0.37) and BPRB was found to exhibit high selectivity towards Pd2+ compared to a range of other metal ions. The enhancement of fluorescence was triggered by spirolactam ring opening followed by depropargylation of BPRB in the presence of Pd2+, as evidenced by FTIR and NMR analyses. BPRB was able to detect Pd0 without the addition of a reducing agent, and the emission intensity of BPRB-Pd0 was almost identical to that of BPRB-Pd2+; however, a rapid fluorescence response was observed in the presence of PPh 3. To explore the efficiency of the rhodamine unit, a bispropargyl derivative of cyclohexane (BPCH) was synthesised and the fluorescence response towards Pd2+ was examined and compared with BPRB, revealing that the rhodamine unit enhanced the fluorescence intensity by 500-fold. The fluorescence images of BPRB and BPRB-Pd2+ samples indicate that BPRB could be useful for imaging Pd2+ in living cells.
原文 | English |
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頁(從 - 到) | 1564-1569 |
頁數 | 6 |
期刊 | Analyst |
卷 | 138 |
發行號 | 5 |
DOIs | |
出版狀態 | Published - 2013 3月 7 |
All Science Journal Classification (ASJC) codes
- 分析化學
- 生物化學
- 環境化學
- 光譜
- 電化學