Naked‐eye detection of Cu (II) and Fe (III) based on a Schiff Base Ruthenium complex with nicotinohydrazide

Abstract

A cyclometalated ruthenium (II) complex 1 [(Ru (Phen)2(Pbznh)]+ PF6− (Phen = 1,10‐phenanthroline and Pbznh = N‐(4‐(pyridine‐2‐yl)benzylidene) nicotinohydrazide) with nicotinohydrazide as a functional group was synthesized and characterized. Changes of its absorption spectra and color induced by Cu2+ and Fe3+ were systematic investigated. The results demonstrated that complex 1 could be served as a colorimetric probe to fast, selective and sensitive detection of Cu2+ and Fe3+ both in acetonitrile and filter paper based strips. Upon addition of Cu2+ and Fe3+ to solution of probe 1, solution color changed from pink to colorless and light yellow respectively, and their corresponding detection limit were calculated to be 3.26 × 10−8 M and 3.12 × 10−7 M. Moreover, color of test papers with 1 changed from pink to colorless/yellow when Cu2+/Fe3+ were dropwise added. Therefore, it can be used as a desirable ‘naked‐eye’ indicator candidate for Cu2+ and Fe3+.

8-Hydroxyquinoline-modified ruthenium(ii) polypyridyl complexes for JMJD inhibition and photodynamic antitumor therapy

“…3B) also showed that the emission intensities of Ru1 and Ru2 decreased with an increase of Fe 2+ concentration, which means that Ru1 and Ru2 can chelate Fe 2+ . The binding assays using Job's method 50 showed that Ru1 or Ru2 formed a 1 : 1 complex with Fe 2+ (Fig. S8 †).…”

A cycloruthenated complex: Detecting Hg2+ by Hg2+‐promoted coordination switch and Cu2+ by coordination

“…[19] Therefore, to avoid a serious impact on human beings, the determination of these heavy metal ions is a very attractive research topic. Generally, interactions between probes and these metal ions mostly are based on coordinative interactions, [15,16,[20][21][22][23][24][25] or thus induced chemical reactions. [17,[26][27][28][29] According to the strong affinity of Hg 2+ with S atom, [30,31] we have synthesized several cycloruthenated 2-thienyl complexes that have been used to detect Hg 2+ with high sensitivity and selectivity.…”