Luminescent oligo(tetraphenyl)silole nanoparticles as chemical sensors for aqueous TNT

Toal, Sarah J.; Magde, Douglas; Trogler, William C.

doi:10.1039/b509404f

Cited by 154 publications

(91 citation statements)

References 13 publications

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“…For example, fluorescence-functionalized polymers; [9] luminescent polymer nanoparticles, such as siloles [6,10] and pentiptycene; [11] and fluorescent silicon nanoparticles, [12] have been synthesized to validate the detection of trinitroaromatics by the fluorescence spectroscopy. Nevertheless, stand-alone single-molecule systems that may be used for the detection of nitroaromatics through fluorescence-based approaches remain rare.…”

Section: Introductionmentioning

confidence: 99%

Dipyrenylcalix[4]arene—A Fluorescence‐Based Chemosensor for Trinitroaromatic Explosives

Lee

Liu

Lee

et al. 2010

Chemistry A European J

176

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A new chemosensor-based approach to the detection of nitroaromatics is described. It involves the analyte-induced quenching of excimer emission of a dipyrenyl calix[4]arene (L). The chemical and photophysical properties of the complexes formed between L and mono-, di-, and trinitrobenzene, and di- and trinitrotoluene were studied in acetonitrile and chloroform by using (1)H NMR, UV/Vis, and fluorescence spectroscopy. Fluorescence spectroscopy revealed that the trinitroaromatics engendered the largest response among the various substrates tested, with the sensitivity for these analytes being correspondingly high. Quantitative analysis of the fluorescence titration profile generated from the titration of L with TNT provided evidence that this particular functionalized calix[4]arene receptor allows for the detection of TNT down to the low ppb level in CH(3)CN. A single-crystal X-ray diffraction analysis revealed that in the solid state the complex L.TNT consists of a supramolecular crystalline polymeric structure, the formation of which appears to be driven by intermolecular pi-pi interactions between two pyrene units and a TNT molecule held at a distance of 3.2-3.6 A, as well as by intra- and intermolecular hydrogen-bonds among the amide linkages. Nevertheless, the changes in the (1)H NMR, UV/Vis, and fluorescence spectrum, including sharp color changes, are ascribed to a charge-transfer interaction arising from complementary pi-pi overlap between the pyrene subunits and the bound trinitroaromatic substrates. A number of ab initio calculations were also carried out and, considered in concert, they provide further support for the proposed charge-transfer interactions, particularly in the case of L.TNT.

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Section: Introductionmentioning

confidence: 99%

Dipyrenylcalix[4]arene—A Fluorescence‐Based Chemosensor for Trinitroaromatic Explosives

Lee

Liu

Lee

et al. 2010

Chemistry A European J

176

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“…Already, quantum dot tracers have allowed ecologists to visualize and quantify organic nitrogen uptake from soils by plants and mycorrhizae (Whiteside et al, 2009). A whole host of nano-sensors are being developed that could revolutionize our understanding of our environment (e.g., Andreescu et al, 2009;Cho et al, 2008;Chopra et al, 2002;Consales et al, 2009;Granqvist et al, 2007;Huang and Chang, 2006;Liu and Lin, 2005;Nelli et al, 1996;Park et al, 2009;Toal et al, 2005), allowing us to detect environmental conditions, gas concentrations, and contaminant loads at a temporal and spatial resolution never before possible. As the tools for nanomaterial measurement and characterization are transferred into ecology, we are increasingly recognizing that many organisms produce nanoparticles, and that these natural nanoparticles may play important roles in biogeochemical cycling (e.g., Gorby et al, 2006;Manceau et al, 2008;Blango and Mulvey, 2009).…”

Section: Discussionmentioning

confidence: 99%

An Ecological Perspective on Nanomaterial Impacts in the Environment

et al. 2010

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1954Growing concerns over the potential for unintended, adverse consequences of engineered nanoparticles (ENPs) in the environment have generated new research initiatives focused on understanding the ecological eff ects of ENPs. Almost nothing is currently known about the fate and transport of ENPs in environmental waters, soils, and sediments or about the biological impacts of ENPs in natural environments, and the bulk of modern nanotoxicogical research is focused on highly controlled laboratory studies with single species in simple media. In this paper, we provide an ecological perspective on the current state of knowledge regarding the likely environmental impacts of nanomaterials and propose a strategy for making rapid progress in new research in ecological nanoscience.

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“…Of particular interest and great practical utility is the phenomenon of aggregation-induced emission (AIE) exhibited by many Group 14 metalloles, notably aryl-substituted siloles, germoles, and stannoles [17,. In 2001, the first paper describing the observation of AIE in siloles appeared [47], and since that time there has been an explosion of interest in these compounds, with particular emphasis on their potential for use in optoelectronic devices, in chemical sensors, and as luminescent probes.…”

mentioning

confidence: 99%

Aggregation-Induced Emission in Group 14 Metalloles (Siloles, Germoles, and Stannoles): Spectroscopic Considerations, Substituent Effects, and Applications

Mullin

Tracy

2013

Aggregation-Induced Emission: Fundamentals

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Luminescent oligo(tetraphenyl)silole nanoparticles as chemical sensors for aqueous TNT

Abstract: Colloidal oligo(tetraphenyl)silole nanoparticles in THF/H2O suspensions show increased luminescence and offer a method to detect TNT in an aqueous environment.

Cited by 154 publications

References 13 publications

Dipyrenylcalix[4]arene—A Fluorescence‐Based Chemosensor for Trinitroaromatic Explosives

Dipyrenylcalix[4]arene—A Fluorescence‐Based Chemosensor for Trinitroaromatic Explosives

An Ecological Perspective on Nanomaterial Impacts in the Environment

Aggregation-Induced Emission in Group 14 Metalloles (Siloles, Germoles, and Stannoles): Spectroscopic Considerations, Substituent Effects, and Applications

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