Tuning of azine derivatives for selective recognition of Ag⁺ with the in vitro tracking of endophytic bacteria in rice root tissue

Abstract

Several azine derivatives have been prepared and structurally characterized by spectroscopic and single-crystal X-ray diffraction analysis. Two of them, viz. naphthalene based (A10) and anthracene based (A11) show fluorescence enhancement in the presence of Ag in aqueous-methanol. Moreover, A11 efficiently tracks Agin vitro endophytic bacteria infected rice root tissue. Experimental results have been substantiated by theoretical DFT calculations.

A multi-functional chemosensor for highly selective ratiometric fluorescent detection of silver(I) ion and dual turn-on fluorescent and colorimetric detection of sulfide

“…For example, Ag + which has a strong interaction with amino and sulfhydryl groups can easily form hazardous complexes with nucleic acids, amino acids and so on [ 23 , 24 ]. Therefore, it is an acute environmental pollutant owing to a large consumption of silver [ 25 – 27 ]. These facts led us to consider that it is of importance to determine silver(I) in the surrounding environment.…”

Aggregation-induced emission-active azines for chemosensing applications: a five-year update

“…40 In previous years, several AIE-active azines have been designed for the selective detection of metal ions, especially Cu 2+ , Zn 2+ and Al 3+ , mostly by complexation through the azine -N atoms. 22,24,[41][42][43][44][45] In general, a 2 : 1 or a 1 : 1 binding between the azine and the metal ion is preferred wherein the analyte binds through the oxygen atom of the attached phenol moiety and an azine nitrogen atom. A snapshot of the azine-based probes, the sensing mechanism, the limit of detection and applications are presented in Table 1.…”

Tetraphenylethylene-Based Tetradentate Azolium Salts: Synthesis and Selective Recognition for Ions

“…Based on the relationship between fluorescence intensity and c Ag ＋ , the detection limit was calculated as 1.3 × 10 -8 mol/L (Figure S11), which was lower than known values in the literatures (from 4.1×10 -6 to 8.74× 10 -7 mol/L). [41][42][43][44] In ultraviolet titration (Figure 7), the absorption band around 240～360 nm gradually enhanced upon adding Ag ＋ to the solution of 2 (1.0×10 -6 mol/L). The stability constant K' of 1.42×10 10 (mol•L -1 ) -2 (R＝0.994) for 2•2Ag ＋ was obtained as shown in Figure S12, [28] which was analogous to K' from fluorescent method.…”