Novel Amino-pillar[5]arene as a Fluorescent Probe for Highly Selective Detection of Au³⁺ Ions

Abstract

A novel fluorescent probe, amino-pillar[5]arene (APA), was prepared via a green, effective, and convenient synthetic method, which was characterized by nuclear magnetic resonance (NMR), infrared (IR), and high-resolution mass spectrometry. The fluorescence sensing behavior of the APA probe toward 22 metal ions in aqueous solutions were studied by fluorescence spectroscopy. The results showed that APA could be used as a selective fluorescent probe for the specificity detection of Au3+ ions. Moreover, the detection characteristics were investigated by fluorescence spectral titration, pH effect, fluorescence competitive experiments, Job’s plot analysis, 1H NMR, and IR. The results indicated that detection of Au3+ ions by the APA probe could be achieved in the range of pH 1–13.5 and that other coexisting metal ions did not cause any marked interference. The titration analysis results indicated that the fluorescence intensity decreased as the concentration of Au3+ ions increased, with an excellent correlation (R2 = 0.9942). The detection limit was as low as 7.59 × 10–8 mol·L–1, and the binding ratio of the APA probe with Au3+ ions was 2:1. Therefore, the APA probe has potential applications for detecting Au3+ ions in the environment and in living organisms.

Selective Detection of Fe3+, F–, and Cysteine by a Novel Triazole-Linked Decaamine Derivative of Pillar[5]arene and Its Metal Ion Complex in Water

“…A minimal or no change in chemical shift was observed for the other protons of APA during the titration with Fe 3+ . A similar kind of chemical shift was reported in the literature for the interaction of pillar­[ n ]­arene conjugates with metal ions during complexation . Hence, in addition to the fluorescence and UV–visible titrations, 1 H NMR studies further supported the interaction of Fe 3+ with APA .…”

“…A similar kind of chemical shift was reported in the literature for the interaction of pillar[n]arene conjugates with metal ions during complexation. 47 Hence, in addition to the fluorescence and UV−visible titrations, 1 H NMR studies further supported the interaction of Fe 3+ with APA. Further, we explored the secondary sensing properties of an in situ prepared Fe 3+ complex of APA (FeAPA) with anions and amino acids.…”

Sensor heavy metal from natural resources for a green environment: A review relation between synthesis method and luminescence properties of carbon dots

“…[ 37 ] Lately the fluorescent test is the best technique in the particle‐identification, functional effortlessness, and high affectability. [ 38 ] The various experiments on CDs for fluorescence sensors [ 39 ] show the same optical properties with UV absorption. Most of the CDs exhibiting fluorescence wavelength emission properties depend on the excitation wavelength, red driven CDs by growing excitation frequency.…”

Pillar[5]arene‐Modified Gold Nanorods as Nanocarriers for Multi‐Modal Imaging‐Guided Synergistic Photodynamic‐Photothermal Therapy

“…[52][53][54][55] Appropriate substitutions of the substituent groups at the rims endowed pillar[n]arenes with the ability to incorporate with inorganic nanomaterials, resulting in pillar[n]arene-based supramolecular nanovalves and pillar[n]arene-stabilized Au nanoparticles, CuS nanoparticles, etc. [56][57][58] Besides, pillar[n]arenes can be designed to bind with AIE-active photosensitizers containing binding sites via host-guest interactions. [59][60][61][62] For example, Huang, Liu, and co-workers constructed some AIEgen photosensitizers based on the supramolecular complex of water-soluble pillar [5]arene and AIEgen.…”