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: 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