A solvent-dependent chemosensor for fluorimetric detection of Hg²⁺ and colorimetric detection of Cu²⁺ based on a new diarylethene with a rhodamine B unit

Abstract

A novel solvent-dependent chemosensor based on a diarylethene derivative for fluorescent “turn-on” recognition of Hg2+ and colorimetric detection of Cu2+ was synthesized, its multi-controllable photoswitchable behaviors with light and chemical stimuli were investigated.

A Highly Selective Fluorescent Probe for Hg2+ Based on a 1,8-Naphthalimide Derivative

“…Therefore, most fluorescent probes for the determination of mercury ions are designed by the inspiration of the fluorescence quenching mechanism − and their sensitivity is lower than that of enhanced probes. However, only part of the measurement is based on the fluorescence enhancement principle for mercury ions. − Therefore, the design of a fluorescence-enhanced Hg 2+ probe with high selectivity and sensitivity has great prospects and challenges.…”

Non‐Conjugated Bis‐(Dithienylethene)‐Naphthalenediimide as a Dynamic Anti‐Counterfeiting Agent: Driving the Wheel of Photoswitching Enactment

“…After gradual irradiation of 254 nm UV light, decrease of the 264 nm absorption band was noticed along with the generation of a new absorption band at 577 nm (ϵ=2.44×10 4 M −1 cm −1 ), characteristic of the formation of closed isomer (Figure 1b). A distinct isosbestic point at 290 nm was observed, indicating two component photochromic behavior of the molecule [45] . Complete conversion of open isomer to closed isomer was achieved in just 44 s, beyond which no significant change was observed in UV‐vis spectra (Figure 1a, inset).…”

“…A distinct isosbestic point at 290 nm was observed, indicating two component photochromic behavior of the molecule. [45] Complete conversion of open isomer to closed isomer was achieved in just 44 s, beyond which no significant change was observed in UV-vis spectra (Figure 1a, inset). Subsequently the 5 c to 5 o cycloreversion process was also monitored by UV-vis absorption spectra with gradual irradiation of > 450 nm visible light, which leads to almost complete conversion of 5 c to 5 o in 160 s (Figure 1b, inset) with steady decrease of absorption band at 577 nm and increase of 264 nm absorption band.…”

Preparation and performance study of rhodamine B naphthylamide, a fluorescent probe, for the detection of Fe3+

“…[24][25][26][27] Rhodamine-based uorescent probes contain spirolactam structures; when subjected to an acidic environment or the action of metal ions, their amide structure undergoes a ring-opening reaction, thus displaying uorescence that can be applied to the corresponding assay. [28][29][30] This study introduces a method for the preparation of a Fe 3+ uorescent probe based on rhodamine B. The novel Fe 3+ uorescent probe based on rhodamine B was synthesized via amide condensation reaction with hexanediamine as the bridge molecule, rhodamine B as the uorescent group, and 1,8naphthalenedicarboxylic anhydride as the recognition group.…”