Journal
INORGANIC CHEMISTRY
Volume 52, Issue 7, Pages 3627-3633Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic3019953
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- UGC-DAE-CRS-Kolkata
- CSIR, New Delhi
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Rhodamine-diformyl p-cresol conjugate (L) has been developed as a novel Al3+-selective fluorometric and colorimetric sensor based on the FRET mechanism for the first time. L can selectively detect Al3+ through time-dependent PET-CHEF and FRET processes. This phenomenon is nicely reflected from H-1 NMR, fluorescence lifetime, and fluorescence cell imaging studies. The probe can detect Al3+ as low as 5 x 10(-9) M in HEPES-buffered EtOH:water (0.1 M, 4:1, v/v, pH 7.4). The probe shows pH-dependent emission properties viz. an intense red emission (585 nm) at acidic pH and an intense green fluorescence (535 nm) at basic pH. Thus, L can also be used as a pH sensor via tunable wavelength.
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