A new triazene-1-oxide derivative, immobilized on the triacetyl cellulose membrane as an optical Ni2+ sensor

A New Optical Sensor for Selective Monitoring of Nickel Ion Based on A Hydrazone Derivative Immobilized on the Triacetyl Cellulose Membrane

“…They were produced from waste photographic film tapes, which were previously treated with commercial sodium hypochlorite for several seconds in order to remove the colored gelationous layers [26,32]. The triacetyl cellulose transparent film was hydrolyzed in order to deesterify the acetyl groups and to increase the porosity of the membrane by treating the membrane into 0.10 M NaOH solution for 24 h. The films were treated with a solution of 0.007 g of the compound L, in 10 ml ethylene diamine for 2 min at ambient temperature.…”

“…It is evident that the membrane absorbance at 337 nm decrease by increasing Ni 2+ concentration as a result of the complex formation in the optode. During the titration, no measurable spectral shift was observed, which is typical for an absorption process involving a strong complex formation [26].…”

“…The absorbance maximum of L showed a blue shift from 417 nm to about 337 nm upon the immobilization as is obvious from Figure 3. This can suggest that the structured conformation of the immobilized 1-acenaphthoquinone 1-thiosemicarbazone compound is less flat than that of its soluble analogue [26]. Furthermore, it is evident that the first region of spectra at about 200-300 nm for the membrane sensor in compare to the dissolved form of L, in methanol was disappeared too.…”

“…The compounds contain some donor atoms have been frequently used as ionophores in construction of membrane sensors because of their ability to form stable complexes with transition metal ions. They produce remarkable selectivity, sensitivity and stability for a specific ion [23][24][25][26].…”

Electrochemical biosensor for Ni 2+ detection based on a DNAzyme-CdSe nanocomposite

“…The detectable concentration range was much wider than those of 10-50 μM (Ghosh et al, 2014) for PL detection and 1.18 nM-73.4 μM for optical method (Alizadeh et al, 2014). Meanwhile, an LOD of 6.67 nM was much lower than the 0.1 μM of colorimetric method (Diecenia et al, 2014).…”