scholarly journals A Simple Turn-off Schiff Base Fluorescent Sensor for Copper (II) Ion and Its Application in Water Analysis

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1233
Author(s):  
Xing Zhang ◽  
Ling-Yi Shen ◽  
Qi-Long Zhang ◽  
Xian-Jiong Yang ◽  
Ya-Li Huang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Fluorescent Probe ◽  
Fluorescent Sensor ◽  
Tap Water ◽  
Condensation Reaction ◽  
Aqueous Media ◽  
Sensitivity And Selectivity ◽  
One Step ◽  
Fluorescence Titrations ◽  
Nmr Titrations

An aniline-functionalized naphthalene dialdehyde Schiff base fluorescent probe L with aggregation-induced enhanced emission (AIEE) characteristics was synthesized via a simple one-step condensation reaction and exhibited excellent sensitivity and selectivity towards copper(II) ions in aqueous media with a fluorescence “ turn-off ” phenomenon. The detection limit of the probe is 1.64 × 10−8 mol·L−1. Furthermore, according to the results of the UV-vis/fluorescence titrations, Job’s plot method and 1H-NMR titrations, a 1:2 stoichiometry was identified. The binding constant between L and Cu2+ was calculated to be Ka = 1.222 × 103. In addition, the AIEE fluorescent probe L could be applied to detection in real water samples with satisfactory recoveries in the range 99.10–102.90% in lake water and 98.49–102.37% in tap water.

scholarly journals Styrene and Azo-Styrene Based Colorimetric Sensors for Highly Selective Detection of Cyanide

2017 ◽  
Vol 17 (2) ◽  
pp. 238
Author(s):  
Agustina Eka Prestiani ◽  
Bambang Purwono
Keyword(s):  
Color Change ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Aqueous Media ◽  
Colour Change ◽  
High Sensitivity ◽  
Colorimetric Sensing ◽  
Sensitivity And Selectivity ◽  
One Step ◽  
Knoevenagel Condensation Reaction

A novel styrene (1) and azo-styrene (2) based chemosensor from vanillin has been successfully synthesized. Sensor 1 was obtained by one step Knoevenagel condensation of Ultrasound method and sensor 2 by coupling diazo and Knoevenagel condensation reaction. Both of sensors showed high sensitivity and selectivity to detect CN- in aqueous media, even the presence of other anions, such as F-, Cl-, Br-, I-, CO32-, SO42-, H2PO4-, and AcO-. Colorimetric sensing of sensor 1 is inclined to be deprotonating of sensor binding site in the presence of cyanide and consequently improve the selectivity and sensitivity in sensing cyanide which displayed color change of sensor from yellowness to red-purple and then purple in 1 min. Sensor 2 exhibited chemodosimeter phenomenon which is caused by the nucleophilic addition of cyanide with a colour change from green to greenish-blue. The results enable to do an anion detection by a naked eye.

A selective fluorescent probe based on bis-Schiff base for “turn-on” detection of Al3+and cysteine by different mechanisms

RSC Advances ◽  
2016 ◽  
Vol 6 (30) ◽  
pp. 25420-25426 ◽  
Author(s):  
Yang Li ◽  
Caiyun Liao ◽  
Shanshan Huang ◽  
Hui Xu ◽  
Baozhan Zheng ◽  
...  
Keyword(s):  
Schiff Base ◽  
Fluorescent Probe ◽  
Fluorescent Sensor ◽  
Turn On

A novel fluorescent sensorLbased on phenolphthalein derivative bis-Schiff base for “turn-on” detection of Al3+and cysteine on different mechanisms.

scholarly journals Development of a fused imidazo[1,2-a]pyridine based fluorescent probe for Fe3+ and Hg2+ in aqueous media and HeLa cells

RSC Advances ◽  
2019 ◽  
Vol 9 (51) ◽  
pp. 29856-29863 ◽  
Author(s):  
Suman Srivastava ◽  
Neha Thakur ◽  
Ashutosh Singh ◽  
Poonam Shukla ◽  
Vipin Kumar Maikhuri ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Hela Cells ◽  
Fluorescent Sensor ◽  
Aqueous Media ◽  
Selective Detection ◽  
Cascade Cyclization ◽  
Turn On ◽  
Highly Sensitive

A new fluorescent sensor 5 having fused imidazopyridine scaffold has been synthesized via cascade cyclization. It exhibits highly sensitive and selective detection of Fe3+ (‘turn-on’) and Hg2+ (‘turn-off’) in vitro and in HeLa cells.

An efficient vanillinyl Schiff base as a turn on fluorescent probe for zinc(ii) and cell imaging

RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 48997-49005 ◽  
Author(s):  
Anup Kumar Bhanja ◽  
Chiranjit Patra ◽  
Sudipa Mondal ◽  
Durbadal Ojha ◽  
Debprasad Chattopadhyay ◽  
...  
Keyword(s):  
Schiff Base ◽  
Fluorescent Probe ◽  
Living Cell ◽  
Cell Imaging ◽  
Fluorescent Sensor ◽  
Turn On ◽  
Living Cell Imaging

Vanillinyl Schiff base (H2L), a nontoxic probe and a fluorescent sensor to Zn2+, LOD 0.018 μM is used for living cell imaging.

A logic gate-based fluorescent sensor for detecting H2S and NO in aqueous media and inside live cells

2015 ◽  
Vol 51 (21) ◽  
pp. 4414-4416 ◽  
Author(s):  
Peisheng Zhang ◽  
Jun Li ◽  
Bowen Li ◽  
Jiangsheng Xu ◽  
Fang Zeng ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Fluorescent Sensor ◽  
Logic Gate ◽  
Aqueous Media ◽  
Live Cells ◽  
In Cells

A single fluorescent probe herein can sensitively and selectively detect H2S and NO in solution and in cells by using a logic gate approach.

scholarly journals Schiff Base Functionalized 1,2,4-Triazole and Pyrene Derivatives for Selective and Sensitive Detection of Cu2+ in the Mixed Organic- Aqueous Media

2021 ◽  
Author(s):  
Nam Gyu Choi ◽  
Balasaheb D. Vanjare ◽  
Prasad G. Mahajan ◽  
Rajendran Nagarajan ◽  
Hyang Im Ryoo ◽  
...  
Keyword(s):  
Schiff Base ◽  
Colorimetric Detection ◽  
Aqueous Media ◽  
Stoichiometric Ratio ◽  
Naked Eye ◽  
Lower Detection Limit ◽  
Lower Detection ◽  
Pyrene Derivatives ◽  
Sensitivity And Selectivity

Abstract We have prepared Schiff base functionalized 1,2,4-Triazole and Pyrene derivatives for selective, sensitive, and naked eye colorimetric detection of Cu2+ in the mixed organic- aqueous media. Amongst the 18 different metal ions studied for absorption and fluorescence titration, only Cu2+ ion encourages the modification in spectral properties of Schiff base functionalized 1,2,4-Triazole and Pyrene Probe. The stoichiometric ratio of the Probe-Cu2+ complex was determined to be 2:1 according to Job’s plot. The lower detection limit estimated for Cu2+ is 0.234 nM which shows excellent sensitivity and selectivity of the present analytical method towards detection of Cu2+ ion in the mixed organic-aqueous media. The present approach has been successfully utilized for the quantitative determination of Cu2+ ion from environmental aqueous solution.

A remarkable effect of N,N-diethylamino functionality on the optoelectronic properties of a salicylimine-based probe for Al3+

2014 ◽  
Vol 43 (15) ◽  
pp. 5831-5839 ◽  
Author(s):  
Neeraj Neeraj ◽  
Ajit Kumar ◽  
Virendra Kumar ◽  
Rahul Prajapati ◽  
Sharad Kumar Asthana ◽  
...  
Keyword(s):  
Schiff Base ◽  
Fluorescent Probe ◽  
Aqueous Media ◽  
Optoelectronic Properties ◽  
Live Cell ◽  
Remarkable Effect

A new live-cell permeable, fluorescent probe comprised of a simple salicylimine-based Schiff base (SA1) has been developed for Al3+ with nano-molar sensitivity in aqueous media.

scholarly journals Schiff-Based Fluorescent-ON Sensor L Synthesis and Its Application for Selective Determination of Cerium in Aqueous Media

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Maria Sadia ◽  
Jehangir Khan ◽  
Robina Naz ◽  
Muhammad Zahoor ◽  
Ezzat Khan ◽  
...  
Keyword(s):  
Metal Ion ◽  
Limit Of Detection ◽  
Fluorescent Sensor ◽  
Aqueous Media ◽  
High Sensitivity ◽  
Transition Metal Ions ◽  
Acetonitrile Solution ◽  
Selective Determination ◽  
Sensitivity And Selectivity

In the present study, a fluorescent sensor L for sensing of Ce3+ ion was designed and characterized by XRD, 1HNMR, and FTIR. Its fluorescence behavior towards metal ion was examined by fluorescence spectroscopy. Chelation-enhanced fluorescence was shown by the sensor L upon interaction with Ce3+ ion. This fluorescent sensor exhibits high sensitivity and selectivity towards Ce3+ ion in acetonitrile solution, forming 2 : 1 (L : M) complex as determined by Job’s plot. Association constant was found to be 1×107 M−1 estimated from the Benesi-Hildebrand plot. No significant interference was observed in the presence of other studied alkali, alkaline, and transition metal ions. A rapid response was observed when employed for the determination of Ce3+ ion in spiked water samples with a limit of detection equal to 3.4×10−8 M.

One-step synthesis of a carbon dot-based fluorescent probe for colorimetric and ratiometric sensing of tetracycline

2020 ◽  
Vol 12 (42) ◽  
pp. 5097-5102
Author(s):  
Jing Xue ◽  
Na-Na Li ◽  
Dong-Mei Zhang ◽  
Cai-Feng Bi ◽  
Cun-Gang Xu ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Fluorescent Probe ◽  
Butyric Acid ◽  
Carbon Dots ◽  
High Selectivity ◽  
Fluorescent Sensor ◽  
Blue Fluorescence ◽  
Carbon Dot ◽  
Ratiometric Detection ◽  
One Step

Carbon dots (CDs) with blue fluorescence were synthesized by indole-3-butyric acid and l-tryptophan using a one-step hydrothermal method. The CDs were used as a fluorescent sensor with high selectivity for colorimetric and ratiometric detection of tetracycline (TC) in water.

scholarly journals Highly Selective Fluorescent Probe for the Detection of Copper (II) and Its Application in Live Cell Imaging

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Zhihao Guo ◽  
Xiuji Wang ◽  
Pei Wei ◽  
Yihua Gao ◽  
Qin Li
Keyword(s):  
Metal Ions ◽  
Fluorescent Probe ◽  
Fluorescence Imaging ◽  
Live Cell Imaging ◽  
Cell Imaging ◽  
Rhodamine 6G ◽  
Aqueous Media ◽  
Living Cells ◽  
Sensitivity And Selectivity ◽  
Photophysical Studies

The development of fluorescent methods for the detection of metal ions is of great importance due to their diverse environmental and biological roles. Herein, a rhodamine 6G-based off-on fluorescent probe (L1) with a t-butyl pyrrole moiety as the recognition site was designed and synthesized. Photophysical studies show that L1 exhibits excellent sensitivity and selectivity towards Cu2+ to other metal ions in neutral acetonitrile aqueous media. Mechanism studies suggest that the recognition process may associate with a Cu2+ promoted hydrolysis reaction of L1. Furthermore, L1 has been successfully applied in fluorescence imaging of Cu2+ ion in living cells.

Sign in / Sign up

Export Citation Format

Share Document