Schiff base derived Fe³⁺-selective fluorescence turn-off chemsensors based on triphenylamine and indole: synthesis, properties and application in living cells

Abstract

A Schiff base with an AIE effect could act as a turn-off fluorescent chemosensor for Fe3+in living cells.

Retracted: A new 3D pillar‐layered Cd(II) compound: Luminescence sensing property for detection of Fe3+ ions and treatment activity on focal cerebral ischemia/reperfusion

“…Fe 3+ is an indispensable trace component existing in biological systems, which plays a key role in organism and metabolism. [4,5] The excess or deficiency in organism will cause serious diseases, such as heart/liver damage, stomach pain, anemia, etc. [6] As a new kind of functional substances, metal-organic frameworks (MOFs) have been widely employed in gas preservation and separation, Zhi Wang and Ming Ye contributed equally to this work.…”

Triphenylamine-based small-molecule fluorescent probes

“…11a) for the detection of Fe 3+ by a turn-off method. 75 Interestingly, the compound shows AIE behaviour in the free environment, but shows fluorescence-off behaviour with the incorporation of Fe 3+ . The mechanism involved here is PET through the formation of a stoichiometric 2 : 1 complex.…”

“…A variety of metal ions, such as Cu 2+ , Al 3+ , Mg 2+ , Fe 3+ , and Zn 2+ , play important roles in living organisms, but excessive or insufficient amounts can cause a variety of diseases. 56–67 For instance, copper plays a vital role in various biological processes. However, Cu 2+ has a good redox property and can cause different health issues by accelerating the production of reactive oxygen species (ROSs).…”

Fluorescence study of 5-nitroisatin Schiff base immobilized on SBA-15 for sensing Fe3+

“…For example, several analytical techniques for detecting iron ions have been generally developed using instrumental techniques such as Voltammetry, Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES), and Flame Atomic Absorption Spectrometry (FAAS) [4,5]. However, these techniques become inaccessible because of some inherent limitations such as being expensive, complicated sample pretreatments and due to usage of harmful solvents [2,6]. Recently, fluorescent chemosensors have significantly became an interest because these compounds or materials can be used in environmental research with high sensing capabilities such as easy detection, quick response, good selectivity, high sensitivity, and low costs [7,8].…”