Two new rhodamine-based fluorescent chemosensors for Fe3+ in aqueous solution.
Two new rhodamine-based fluorescent probes were synthesized and characterized by NMR, high resolution mass spectrometer (HR-MS) and IR. The probes displayed a high selectivity for Fe(3+) among environmentally and biologically relevant metal ions in aqueous solution (CH3OH-H2O = 3 : 2, v/v). The significant changes in the fluorescence color could be used for naked-eye detection. Job's plot, IR and (1)H NMR indicated the formation of 1: 1 complexes between sensor 1 and Fe(3+). The reversibility establishes the potential of both probes as chemosensors for Fe(3+) detection. The probe showed highly selectivity in aqueous solution and could be used over the pH range between 5 and 9. A simple paper test-strip system for the rapid monitoring of Fe(3+) was developed, indicating its convenient use in environmental samples.
Phosphorus Chemical Engineering Research Center of Henan Province, the College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, China.
Yaqi
Y
Liu
Zhanhui
Z
Xu
Jinhui
J
Wang
Di
D
Zhang
Yong
Y
Ye
Yufen
Y
Zhao
D005290:Ferric Compounds / Q000032:analysis*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D012235:Rhodamines / Q000138:chemical synthesis / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D014867:Water / Q000737:chemistry
D005290:Ferric Compounds; D005456:Fluorescent Dyes; D012235:Rhodamines; D012996:Solutions; D014867:Water
Fe3+; chemosensors; fluorescence; reversible; rhodamine