標題: | Facile rhodamine-based colorimetric sensors for sequential detections of Cu(II) ions and pyrophosphate (P2O74-) anions |
作者: | Arumugaperumal, Reguram Srinivasadesikan, Venkatesan Lin, Ming-Chang Shellaiah, Muthaiah Shukla, Tarun Lin, Hong-Cheu 材料科學與工程學系 應用化學系 Department of Materials Science and Engineering Department of Applied Chemistry |
公開日期: | 1-一月-2016 |
摘要: | Two rhodamine hydrazine derivatives Rh1 and Rh2 with catechol and ether functionalities have been synthesized and utilized towards sequential colorimetric detections of Cu(II) and pyrophosphate (PPi) ions in CH3CN-H2O (v/v = 9 : 1, 5 mM Tris-HCl, pH 7.4) semi-aqueous medium. Notably, Rh1 and Rh2 are the first example of colorimetric rhodamine-based probes for the sequential detections of Cu2+ ion and PPi anion. Based on the significant colorimetric responses (from colorless to pink) of Rh1 and Rh2 to Cu2+ ions, the detection limits were estimated as low as 1.22 x 10(-8) M and 8.0 x 10(-7) M, respectively, which signified the utilities of designed probes towards facile detections of Cu2+ ions. Furthermore, upon the successive addition of PPi ion to Rh1-Cu2+ and Rh2-Cu2+ complexes, it has been altered and restored to its origin of Rh1 and Rh2 via re-coordination of PPi to Cu2+ ion, which was confirmed by color changes from pink to colorless. Moreover, computational DFT calculations provided more insights into HOMO-LUMO structures of rhodamine derivatives and their copper complexes. Additionally, the solid state strip-based colorimetric detections of Cu2+ ion were supplemented as a real time application. |
URI: | http://dx.doi.org/10.1039/c6ra24472f http://hdl.handle.net/11536/132907 |
ISSN: | 2046-2069 |
DOI: | 10.1039/c6ra24472f |
期刊: | RSC ADVANCES |
Volume: | 6 |
Issue: | 108 |
起始頁: | 106631 |
結束頁: | 106640 |
顯示於類別: | 期刊論文 |