scholarly journals A Review on 2,6-Diformyl-4-methylphenol Derived Schiff Bases as Fluorescent Sensors

2020 ◽  
Vol 32 (8) ◽  
pp. 1837-1848
Author(s):  
Mrinal sarkar
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
High Sensitivity ◽  
Electronic Configuration ◽  
Fluorescent Sensors ◽  
Intermolecular Hydrogen Bonding ◽  
Fluorescent Chemosensors ◽  
Emission Mechanism ◽  
Sensitivity And Selectivity ◽  
Transfer Mechanisms

2,6-Diformyl-4-methylphenol fluorophore derived Schiff base sensors detect metal ions such as Zn2+, Al3+, Hg2+, Cd2+, Sn2+ and Cu2+ with high sensitivity and selectivity through changes in fluorescence intensity based on CHEF, ICT, FRET, ESIPT, C=N isomerization and PET mechanism. Several anions viz. HPO4 2–, H2PO4 –, PO4 3–, AsO3 3–, H2AsO4 –, AsO2 –, PPi (pyrophosphate), I–, F– and N3 – were also detected through intermolecular hydrogen bonding (between sensor and anion) based on TICT, PET, CHEF, ESIPT and aggregation induced emission mechanism. Selectivity and sensitivity for these metal ions and anions were achieved by introducing various amines to core fluorophore 2,6-diformyl-4-methylphenol. Majority of these fluorescent sensors were Zn2+ ion selective. Due to the filled d10 electronic configuration of Zn2+ ion usually does not show deactivation of excited state via any electron or energy transfer mechanisms. Both solvent dependent and independent ten multi-ion selective sensors are found. This review will consolidate on 2,6-diformyl-4-methylphenol derived Schiff base fluorescent chemosensors.

A metal-organic framework featuring highly sensitive fluorescence sensing for Al3+ ion

CrystEngComm ◽  
2021 ◽  
Author(s):  
Yang Qiao ◽  
Zeqi Li ◽  
Mei-Hui Yu ◽  
Ze Chang ◽  
Xian-He Bu
Keyword(s):  
Metal Ions ◽  
Human Health ◽  
Metal Organic Framework ◽  
High Sensitivity ◽  
Fluorescence Sensing ◽  
Sensing Material ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
Metal Organic ◽  
Organic Framework

High sensitivity and selectivity for detection of metal ions are very important to protect human health. Fluorescent metal-organic framework (MOF) as a new sensing material has attracted more and more...

Highly Hg2+-sensitive and selective fluorescent sensors in aqueous solution and sensors-encapsulated polymeric membrane

RSC Advances ◽  
2016 ◽  
Vol 6 (13) ◽  
pp. 10401-10411 ◽  
Author(s):  
Sasiwimon Kraithong ◽  
Pattareeya Damrongsak ◽  
Kullatat Suwatpipat ◽  
Jitnapa Sirirak ◽  
Pattanawit Swanglap ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Detection Limits ◽  
High Sensitivity ◽  
Fluorescent Sensors ◽  
Polymeric Membranes ◽  
Polymeric Membrane ◽  
Sensitivity And Selectivity

The sensors in solutions and sensors encapsulated polymeric membranes exhibited high sensitivity and selectivity for Hg2+ detection, with detection limits of 0.2–49 ppb.

Calixarene-Based Fluorescent Chemosensors for Metal Ions via Clicking

2014 ◽  
Vol 687-691 ◽  
pp. 4223-4227 ◽  
Author(s):  
Wei Ping Tang ◽  
Ming Yang Su
Keyword(s):  
Metal Ions ◽  
Detection Limits ◽  
High Sensitivity ◽  
Fluorescent Chemosensors ◽  
High Detection

Calixarene-based fluorenscent chemosenors, owing to its simplicity, high sensitivity and high detection limits for metal ions in biology and the environment, has been received much attention. Via cliking, calixarene derivations has the group of triazoles, which can bind to metol ions, but also can be modified by various fluorophores. This in-depth review provides an overview of calixarene-based fluorescent chemosensors for metal ions via clicking.

scholarly journals NIR luminescent detection of quercetin based on an octanuclear Zn(ii)–Nd(iii) salen nanocluster

RSC Advances ◽  
2021 ◽  
Vol 11 (57) ◽  
pp. 35893-35897
Author(s):  
Mengyu Niu ◽  
Xiaoping Yang ◽  
Yanan Ma ◽  
Chengri Wang ◽  
Desmond Schipper
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
High Sensitivity ◽  
Sensitivity And Selectivity

An octanuclear Zn(ii)–Nd(iii) nanocluster was constructed by the use of a salen-type Schiff base ligand, and it shows an interesting NIR lanthanide luminescent response to quercetin with high sensitivity and selectivity.

A Simple and Sensitive Colorimetric Detection of Silver Ions Based on Cationic Polymer-Directed AuNPs Aggregation

2013 ◽  
Vol 66 (1) ◽  
pp. 113 ◽  
Author(s):  
Faze Wang ◽  
Yuangen Wu ◽  
Shenshan Zhan ◽  
Lan He ◽  
Wenting Zhi ◽  
...  
Keyword(s):  
Metal Ions ◽  
Colorimetric Detection ◽  
High Sensitivity ◽  
Silver Ions ◽  
Cationic Polymer ◽  
Charge Balance ◽  
Remarkable Change ◽  
Sensing Platform ◽  
Sensitivity And Selectivity ◽  
Positively Charged

This paper describes a simple and sensitive colorimetric sensor employing single-stranded DNA (ssDNA) ligand, cationic polymer, and gold nanoparticles (AuNPs) to detect silver ions. The positively charged polymer can electrostatically interact with ssDNA and destroy the charge balance leading to induction of AuNP aggregation. Silver ions (Ag+) can bind to cytosine (C)-rich nucleic acids to form the C-Ag+-C hair-pin structure, which can prevent its interaction with polymers. The resulting cationic polymer could aggregate AuNPs causing a remarkable change in colour. The concentration of Ag+ can be determined visually. This sensing platform exhibits high sensitivity and selectivity towards Ag+ versus other metal ions, with a detection limit of 48.6 nM. The assay did not require any labelling or modifying steps. This method is simple, effective, and convenient and can in principle be used to detect other metal ions or small molecules.

ESIPT-AIE active Schiff base based on 2-(2′-hydroxyphenyl)benzo-thiazole applied as multi-functional fluorescent chemosensors

2021 ◽  
Author(s):  
Han-Wen Zheng ◽  
Yang Kang ◽  
Min Wu ◽  
Qiong-Fang Liang ◽  
Jian-Quan Zheng ◽  
...  
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
Steric Hindrance ◽  
Fluorescent Chemosensors ◽  
Aromatic Rings ◽  
Active Compounds

For AIE-ESIPT-active compounds, their steric hindrance, rotatable aromatic rings and isomerism should be considered when sensing metal ions.

Highly selective and sensitive sensing for Al3+ and F− based on green photoluminescent carbon dots

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97346-97351 ◽  
Author(s):  
Xiang-Ying Sun ◽  
Lu-Lu Wu ◽  
Jiang-Shan Shen ◽  
Xue-Gong Cao ◽  
Cunjin Wen ◽  
...  
Keyword(s):  
Metal Ions ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Sensitivity And Selectivity

A novel sensor for metal ions by mean of CDs with a PL enhancement response, which shows high sensitivity and selectivity. Furthermore, the CDs-Al3+ ions system could be employed to probe F− anions based on a PL “on–off” model.

A T-shaped triazatruxene probe for the naked-eye detection of HCl gas with high sensitivity and selectivity

2016 ◽  
Vol 52 (13) ◽  
pp. 2748-2751 ◽  
Author(s):  
Xiang-Chun Li ◽  
Chun-Yu Wang ◽  
Yi Wan ◽  
Wen-Yong Lai ◽  
Li Zhao ◽  
...  
Keyword(s):  
Schiff Base ◽  
High Sensitivity ◽  
Eye Detection ◽  
Naked Eye ◽  
Sensitivity And Selectivity ◽  
Hcl Gas ◽  
Naked Eye Detection

A T-shaped Schiff-base triazatruxene derivative (TATNFF) was designed, synthesized, and explored as a sensitive probe to detect HCl gas by the naked eye.

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