Simple admixture of 4-nitrobenzaldehyde and 2,4-dimethylpyrrole for efficient colorimetric sensing of copper(II) ions

Rajaswathi, Karnan; Jayanthi, Muruganandam; Rajmohan, Rajamani; Veerappan, Anbazhagan; Vairaprakash, Pothiappan

doi:10.1016/j.saa.2019.01.014

Cited by 18 publications

(7 citation statements)

References 39 publications

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“…A linear plot is obtained for the increase in the intensity of Cu(II) ions versus absorbance at 413 nm as shown in Figure 5. The limit of detection (LOD) of Schiff base for Cu 2+ ions is determined using the following equation [29]

true L O D = 3 \times \frac{S t a n d a r d d e v i a t i o n ((), σ)}{S l o p e o f t h e c a l i b r a t i o n c u r v e ((), s)}

…”

Section: Resultsmentioning

confidence: 99%

New Schiff Base as Selective and Sensitive Detection of Copper Ions in Aqueous Solvent

2020

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Detection of metals in aqueous solution is advantageous in the field of food, nutrition and drug chemistry. Hence, a new sensor was designed for the selective and sensitive detection of Cu2+ ions in the aqueous media. Herein, Schiff base L=(E)‐N′‐((1H‐indol‐2‐yl)methylene)isonicotinohydrazide acts as a sensor which consist of isaniazid and indole moiety connected with azomethine linkage. Single crystal X ray analysis along with other spectroscopic methods was used to confirm the structure of the synthesized ligand. Theoretical calculations were performed which gave satisfactory correlation with experimental results. A naked eye color change from colorless to yellow was observed upon addition of Cu(II) ions in synthesized Schiff base sensor. UV‐Visible absorption spectroscopy was used for the further sensing experiments and a red shift of 63 nm was observed only in the case of Copper ions in a pH range of 6–8, this confirms the selective nature of Schiff base sensor towards the Cu2+ ions. Negligible interference of other metal ions in the sensing of copper ions was confirmed by interference study.Calculated limit of detection for copper detection in aqueous media was 0.05 μM. To check the practical applications of the studied Schiff base as a chemosensor, test strips test was also performed.

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true L O D = 3 \times \frac{S t a n d a r d d e v i a t i o n ((), σ)}{S l o p e o f t h e c a l i b r a t i o n c u r v e ((), s)}

…”

Section: Resultsmentioning

confidence: 99%

New Schiff Base as Selective and Sensitive Detection of Copper Ions in Aqueous Solvent

2020

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“…Previously, we have developed a facile method to access HMF from fructose at room temperature, utilizing silica as a solid support, mitigating humin formation, and facilitating selective extraction of HMF . Also, we have strategically utilized 2,4-dimethylpyrrole (DMP) in developing a colorimetric naked-eye chemosensor for copper(II) ions. , Here, we have utilized these two sustainable raw materials (HMF and DMP) in developing a sustainable photocatalyst with an objective to mitigate our dependency on fossil-based chemicals. A retrosynthetic scheme originating from sustainable raw materials including 5-hydroxymethylfurfural (HMF), succinic anhydride, and 2,4-dimethylpyrrole was designed to access the photocatalyst (Scheme ).…”

Section: Results and Discussionmentioning

confidence: 99%

5-Hydroxymethylfurfural-Derived Boron-Dipyrromethene Immobilized on Resin Support as a Sustainable Catalyst for C–H Arylation of Heterocycles

2019

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5-Hydroxymethylfurfural (HMF) was used as a sustainable raw material in the development of a resin-supported boron-dipyrromethene (BODIPY)-based photocatalyst. In the development of the catalyst, the brominated product (HMF-BODIPY-Br) and photocatalyst (HMF-BODIPY-Br-Suc) were isolated under a chromatography-free condition. The photocatalyst was loaded on polymeric resin by bridging alcohol functionality in HMF and amine functionality in polymeric resin using succinic anhydride. The resin-supported photocatalyst was used in light-mediated C–H arylation of various heterocycles using aryldiazonium salt. For representative examples, diazotization and photoarylation were carried out in one pot, and arylated furans were obtained in very good yields. C–H arylation was found to proceed via a photogenerated radical intermediate, and the radical intermediate was trapped by forming an adduct with TEMPO.

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“…They are (i) 1,3,7,9-tetramethyl-5-aryldipyrromethanes obtained from an aldehyde and 2,4-dimethylpyrrole and (ii) 5-aryldipyrromethanes obtained from an aldehyde and an unsubstituted pyrrole. We have previously studied the application of 1,3,7,9-tetramethyl-5-aryldipyrromethanes as chemosensors 41,42 and also utilized 1,3,7,9-tetramethyl-5-furanyldipyrromethane in the preparation of BODIPY based photocatalysts. 43 Unsubstituted DPMs were utilized in the development of bis(dipyrrinato)zinc complexes and various tetrapyrrolic macrocycles, including porphyrins, chlorins, etc.…”

Section: Synthesis Of Dipyrromethanes Using Res-hmf-cu As a Catalystmentioning

confidence: 99%

A sustainable pseudo-homogeneous catalyst from renewable biomass: design, development and catalytic applications

et al. 2022

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Simple admixture of 4-nitrobenzaldehyde and 2,4-dimethylpyrrole for efficient colorimetric sensing of copper(II) ions

Cited by 18 publications

References 39 publications

New Schiff Base as Selective and Sensitive Detection of Copper Ions in Aqueous Solvent

New Schiff Base as Selective and Sensitive Detection of Copper Ions in Aqueous Solvent

5-Hydroxymethylfurfural-Derived Boron-Dipyrromethene Immobilized on Resin Support as a Sustainable Catalyst for C–H Arylation of Heterocycles

A sustainable pseudo-homogeneous catalyst from renewable biomass: design, development and catalytic applications

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