Synthesis and Characterization of a Rapid and Highly Selective Fluorescent Hg<sup>2+</sup>Sensor in Aqueous Media

Li, Xiao Liang; He, Yong Wu; Yang, Sung Ik

doi:10.5012/bkcs.2011.32.1.338

Cited by 8 publications

(1 citation statement)

References 19 publications

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“…[14] By utilizing the unique photophysical properties of pyrene and its derivatives, detection of wide variety of chemical moieties like small molecules, cations, anions and even biomolecules are reported. [15][16][17][18][19][20][21][22][23] Bai et al have reported a long wavelength fluorescent pyrene chemosensor for the detection of Hg 2 + in 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) buffer (10 mM, pH = 7.4)/CH 3 CN (30 : 70, v/v) solution. [24] The design of chemosensor consisted of pyrene linked to thiadiazole moiety (binding site) through amide linkage.…”

Section: Introductionmentioning

confidence: 99%

Structure‐Property Correlation of C10‐(H)‐Arylated‐N‐(pyren‐1‐yl)‐picolinamide Regioisomers towards Cu²⁺ and Fe³⁺ Sensing

et al. 2021

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Recently developed C10‐(H)‐arylated‐N‐(pyren‐1yl)‐picolinamide compounds have been investigated spectroscopically for their photophysical properties and metal ion sensing abilities. Two sets of regioisomers were selected based on their molar absorptivities and fluorescence quantum yields and classified into two series I methoxy group at meta‐ and para‐ position of phenyl ring, and series II methyl group at meta‐ and para‐ position of phenyl ring. Additionally, for better understanding on structure‐property relationship, a comparison study with C‐10 unsubstituted compound was also conducted. All compounds exhibited characteristic absorption and emission responses only towards Cu2+ and Fe3+ ions among all the screened metals. While the reference compound and those with methoxy substituent displayed a fluorescence turn‐off behaviour, compounds with methyl groups showed fluorescence turn‐on response through excimer formation at ∼550 nm in the presence of Cu2+ and Fe3+. Sensing studies were performed to elucidate structure‐property relationship and to obtain limits of detection, binding constants and fluorescence quenching constants. Temperature‐dependent fluorescence studies were performed to distinguish the type of excimers produced by two compounds in series II with the metal ions.

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Section: Introductionmentioning

confidence: 99%

Structure‐Property Correlation of C10‐(H)‐Arylated‐N‐(pyren‐1‐yl)‐picolinamide Regioisomers towards Cu²⁺ and Fe³⁺ Sensing

et al. 2021

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Facile Synthesis of Fluorescent Silver Nanoclusters as Simultaneous Detection and Remediation for Hg²⁺

Lee

et al. 2015

Bulletin Korean Chem Soc

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Mercury is one of the most toxic metals to the environment and human life.1 This metal can cause serious health problems because it easily passes through skin, respiratory tract, and gastrointestinal tissues into the human body, which will damage kidney, central nervous system, and endocrine system. 2,3Thus, it is highly desirable to develop the methods for monitoring and remediation of mercury in industrial waste sites and in the environment.In addition, considerable interest has been devoted to the development of sensitive fluorescent sensors for Hg 2+ based on fluorophores, 4 aptamers, 5 nanoparticles, 6 and metal nanoclusters.7 Recently, gold nanoclusters (AuNCs) and silver nanoclusters (AgNCs) have emerged as promising materials for the detection of Hg 2+ . [8][9][10][11] Adhikari reported the synthesis of fluorescent AgNCs (quantum yield: 2%) by reducing a mixture of lipoic acid and Ag + with NaBH 4 at room temperature. 12 Although several methods for the detection of Hg 2+ have been fabricated, the preparation of fluorescent AuNCs [13][14][15][16][17] or AgNCs 18-21 involves time-consuming synthesis procedures. The typical synthetic processes for fluorescent NCs are complicated and take several hours. Attentions have been attracted for the modification of the time-consuming methods for the synthesis of metal NCs. For example, microwave assistance has been proven effective for improvement of reaction rate as well as quantum yield. 22,23 In this regard, the development of the facile process for a rapid synthesis of highly fluorescent, water-soluble NCs is still a great challenge.Considering their large active surface areas, smaller sizes of NCs might be even more promising in the area of remediation of mercury in the environment. Several research groups reported the use of silver (AgNPs) 24 and gold nanoparticles (AuNPs) 25,26 for the removal of Hg 2+ in aqueous solutions. Herein, we report on the facile synthetic strategy for the preparation of fluorescent AgNCs with red emission using dihydrolipoic acid (DHLA) as ligands and sodium borohydride as reducing agent. The fluorescence quantum yield of AgNCs increased about 1.4 times and the reaction time decreased from hours to several minutes. We found that the fluorescent AgNCs exhibited a rapid response and good selectivity toward Hg 2+ over other metal ions. DHLA-AgNCs were also applicable for the remediation of Hg 2+ in polluted water with high removal efficiencies. Moreover, the AgNCs are potentially useful materials for simultaneous detection and remediation of Hg 2+ in waste sites and in the environment. A simple strategy for synthesizing DHLA-capped fluorescent AgNCs has been developed. By using a heat-assisted process, highly bright AgNCs could be formed within minutes. The formation of AgNCs was evidenced by a color change from brown to red under UV light within several minutes. The as-synthesized DHLA-AgNCs possess bright red fluorescence. Figure 1 shows the fluorescence excitation and emission spectra of AgNCs. Upon excitation at 430 nm, the AgNCs ...

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Nondestructive Monitoring of Kiwi Ripening Process Using Colorimetric Ethylene Sensor

Park

et al. 2016

Bulletin Korean Chem Soc

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Synthesis and Characterization of a Rapid and Highly Selective Fluorescent Hg²⁺Sensor in Aqueous Media

Cited by 8 publications

References 19 publications

Structure‐Property Correlation of C10‐(H)‐Arylated‐N‐(pyren‐1‐yl)‐picolinamide Regioisomers towards Cu²⁺ and Fe³⁺ Sensing

Structure‐Property Correlation of C10‐(H)‐Arylated‐N‐(pyren‐1‐yl)‐picolinamide Regioisomers towards Cu²⁺ and Fe³⁺ Sensing

Facile Synthesis of Fluorescent Silver Nanoclusters as Simultaneous Detection and Remediation for Hg²⁺

Nondestructive Monitoring of Kiwi Ripening Process Using Colorimetric Ethylene Sensor

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Synthesis and Characterization of a Rapid and Highly Selective Fluorescent Hg2+Sensor in Aqueous Media

Cited by 8 publications

References 19 publications

Structure‐Property Correlation of C10‐(H)‐Arylated‐N‐(pyren‐1‐yl)‐picolinamide Regioisomers towards Cu2+ and Fe3+ Sensing

Structure‐Property Correlation of C10‐(H)‐Arylated‐N‐(pyren‐1‐yl)‐picolinamide Regioisomers towards Cu2+ and Fe3+ Sensing

Facile Synthesis of Fluorescent Silver Nanoclusters as Simultaneous Detection and Remediation for Hg2+

Nondestructive Monitoring of Kiwi Ripening Process Using Colorimetric Ethylene Sensor

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Synthesis and Characterization of a Rapid and Highly Selective Fluorescent Hg²⁺Sensor in Aqueous Media

Structure‐Property Correlation of C10‐(H)‐Arylated‐N‐(pyren‐1‐yl)‐picolinamide Regioisomers towards Cu²⁺ and Fe³⁺ Sensing

Structure‐Property Correlation of C10‐(H)‐Arylated‐N‐(pyren‐1‐yl)‐picolinamide Regioisomers towards Cu²⁺ and Fe³⁺ Sensing

Facile Synthesis of Fluorescent Silver Nanoclusters as Simultaneous Detection and Remediation for Hg²⁺