A Highly Sensitive C3-Symmetric Schiff-Base Fluorescent Probe for Cd2+

Jiang, Xiujuan; Li, Min; Lu, Honglin; Xu, Lina; Xu, Hong; Zang, Shuang‐Quan; Tang, Mingsheng; Hou, Hongwei; Mak, Thomas C. W.

doi:10.1021/ic501279y

Cited by 81 publications

(19 citation statements)

References 44 publications

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“…A recent investigation showed up to 90% of elemental Cadmium in more than 100 jewelry items for kids in various stores in Texas, New York, California and Ohio 3 . Number of methods have been developed to detect Cadmium such as Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Atomic Absorption Spectrometry (AAS), electrochemical sensing, fluorescence turn on and off sensing techniques 4–11 . Among many popular methods, fluorescence is a highly reliable and sensitive technique for metal detection.…”

Section: Introductionmentioning

confidence: 99%

Alizarin dye based ultrasensitive plasmonic SERS probe for trace level cadmium detection in drinking water

Dasary

Zones

Barnes

et al. 2016

Sensors and Actuators B: Chemical

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Alizarin functionalized on plasmonic gold nanoparticle displays strong surface enhanced Raman scattering from the various Raman modes of Alizarin, which can be exploited in multiple ways for heavy metal sensing purposes. The present article reports a surface enhanced Raman spectroscopy (SERS) probe for trace level Cadmium in water samples. Alizarin, a highly Raman active dye was functionalized on plasmonic gold surface as a Raman reporter, and then 3-mercaptopropionic acid, 2,6-Pyridinedicarboxylic acid at pH 8.5 was immobilized on the surface of the nanoparticle for the selective coordination of the Cd (II). Upon addition of Cadmium, gold nanoparticle provide an excellent hotspot for Alizarin dye and Raman signal enhancement. This plasmonic SERS assay provided an excellent sensitivity for Cadmium detection from the drinking water samples. We achieved as low as 10 ppt sensitivity from various drinking water sources against other Alkali and heavy metal ions. The developed SERS probe is quite simple and rapid with excellent repeatability and has great potential for prototype scale up for field application.

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Section: Introductionmentioning

confidence: 99%

Alizarin dye based ultrasensitive plasmonic SERS probe for trace level cadmium detection in drinking water

Dasary

Zones

Barnes

et al. 2016

Sensors and Actuators B: Chemical

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“…The synthesis and characterization of 3d-4f polynuclear coordination compounds are current and intensively developing field of science. The studies cover diverse and fascinating structural characteristics as well as potential application such as molecular magnets, catalysts, optical devices, luminescent probes in biology or bioactive agents [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. Schiff base ligands constitute a convenient template for designing and synthesis of new heteronuclear 3d-4f coordination compounds.…”

Section: Introductionmentioning

confidence: 99%

Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization

2018

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A series of racemic, heteronuclear complexes [Zn2Nd(ac)2(HL)2]NO3·3H2O (1), [Zn2Sm(ac)2(HL)2]NO3·3CH3OH·0.3H2O (2), [Zn2Ln(ac)2(HL)2]NO3·5.33H2O (3–5) (where HL is the dideprotonated form of N,N′-bis(5-bromo-3-methoxysalicylidene)-1,3-diamino-2-propanol, ac = acetate ion, and Ln = Eu (3), Tb (4), Dy (5), respectively) with an achiral multisite coordination Schiff base ligand (H3L) were synthesized and characterized. The X-ray crystallography revealed that the chirality in complexes is centered at lanthanide(III) ions due to two vicinally located μ-acetato-bridging ligands. The presented crystals have isoskeletal coordination units but they crystallize in monoclinic (1, 2) or trigonal crystal systems (3–5) with slightly different conformation. In 1 and 2 the ZnII–LnIII–ZnII coordination core is linear, whereas in isostructural crystals 3–5 the chiral coordination cores are bent and lie on a two-fold axis. The complexes 1, 3–5 show a blue emission attributed to the emission of the ligand. For ZnII2SmIII complex (2) the characteristic emission bands of f-f* transitions were observed. The magnetic properties for compounds 1, 4 and 5 are characteristic for the paramagnetism of the corresponding lanthanide(III) ions.

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“…During the past decades, C 2 ‐symmetric molecules have been engaged in various chiral ligands and catalysts . Interestingly, in recent years, some efforts have also been contributed to develop C 3 ‐symmetric molecules in areas of catalysis and materials science, metal ions sensing, and biomolecular interaction and stabilization . However, examples found from the literature of designing C 3 ‐symmetric molecules for biological or biomolecular‐related investigations such as targeting amino acids and DNA are very rare.…”

Section: Introductionmentioning

confidence: 99%

A propeller‐like small molecule as a novel G‐quadruplex DNA binder: The study of fluorescent sensing property and preferential interactions with human telo21 structure

Sun

Hou

et al. 2018

Chem Biol Drug Des

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A new propeller-like small molecule was synthesized with three terminal amino side groups. The molecule was found to be a selective nucleic acid binder towards telo21 G-quadruplex DNA compared with other representative nucleic acids including single-stranded DNA (dA21), duplex DNA (ds26) and RNA. The fluorescent signal of the molecule upon interaction with telo21 G-quadruplex structure shows remarkable enhancement (F /F = 17.9) while interaction with other nucleic acids shows the signal enhancement which is less than 2.1. In addition, a good linear relationship of binding signal correlated with the concentration of telo21 DNA was obtained. Molecular docking study was also performed to acquire the binding behaviour and its interaction modes of the molecule with the structure of human telomeric DNA G-quadruplex. The modelling results show that the three conjugated terminal units (dimethylaminobenzyl groups) associated through the ethylene bridges with the central methylated pyridine ring formed a co-planar conformation upon stacking onto the G-quartets via pi-pi stacking interactions. This could be the key reason that the molecule shows excellent fluorescent signal of binding towards telo21 G-quadruplex DNA rather than other types of nucleic acids.

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A Highly Sensitive C₃-Symmetric Schiff-Base Fluorescent Probe for Cd²⁺

Cited by 81 publications

References 44 publications

Alizarin dye based ultrasensitive plasmonic SERS probe for trace level cadmium detection in drinking water

Alizarin dye based ultrasensitive plasmonic SERS probe for trace level cadmium detection in drinking water

Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization

A propeller‐like small molecule as a novel G‐quadruplex DNA binder: The study of fluorescent sensing property and preferential interactions with human telo21 structure

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