Rhodamine–naphthalene conjugate as a novel ratiometric fluorescent probe for recognition of Al3+

Abstract

In this study, a novel chemosensor (HL) for Al 3+ which contain rhodamine and naphthalene moieties has been designed and synthesized. In the presence of Al 3+ , the receptor exhibited a strong, increasing fluorescent emission centered at 550 nm at the expense of the fluorescent emission of HL centered at 520 nm. We proposed that the addition of Al 3+ triggered intramolecular fluorescence resonance energy transfer (FRET) from naphthalene to Rhodamine 6G.

Naphthalimide‐Benzothiazole Conjugate: A Dosimetric Probe for Colorimetric and Fluorometric Detection of Palladium

“…Compounds 1 and 2 were synthesised according to the Scheme . The precursors 3 and 4 , as used in the Scheme, were prepared according to the reported procedures …”

Controllable Photodynamic Therapy Implemented by Regulating Singlet Oxygen Efficiency

“…FRET was used for the structural analysis of DNA, protein, targeted therapy, fluorescent probe, biosensors etc . When there is a spectral overlap between energy donor (D, emission spectrum) and energy acceptor (A, acceptor absorption), the fluorescence of the donor will be quenched, and the fluorescence of the energy acceptor will be observed ( Figure ) .…”

A Benzothiazole-Based Fluorescent Probe for Ratiometric Detection of Al3+ and Its Application in Water Samples and Cell Imaging

“…The development of fluorescent probes for detection and special analysis has attracted many researchers, and numerous excellent probes for Al 3+ have been reported [11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]. Among them, the ratiometric probe is one of the most popular types of sensors due to the inherent advantage that it can eliminate the interference of the external environment through self-calibration of its response signals either in emission or absorbance intensities at two different wavelengths.…”

“…Among them, the ratiometric probe is one of the most popular types of sensors due to the inherent advantage that it can eliminate the interference of the external environment through self-calibration of its response signals either in emission or absorbance intensities at two different wavelengths. Some ratiometric Al 3+ probes were developed using different fluorophores, including rhodamine–naphthalene [17], rhodamine-benzothiazole [18], 4′-methyl-3-hydroxyflavone [19], coumarin-quinoline [20], rhodamine-chromone [21], carbazole-rhodamine [22], imidazoquinazoline [23], benzothiazole [24], benzimidazole [25], naphthalimide [26], and quinoline–coumarin [27]. However, only a few of these were benzothiazole-based fluorescent probes for the ratiometric detection of Al 3+ [24].…”