Targeting chemicals for waste minimization

Ashbrook, Peter C.; Houts, Todd A.

doi:10.1016/s1074-9098(00)00135-0

Cited by 2 publications

(3 citation statements)

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“…The development of reliable methods for the rapid and selective detection of ultratrace amounts of nitro-explosive are of vital concern for national security as well as catastrophic environmental pollution. − Although, RDX and 2,4,6-trinitrotoluene (TNT) are the most widely used nitroexplosives; picric acid (PA) is another superior explosive material having low safety coefficient, high detonation velocity and extensively used until World War I because of its potent explosive nature than TNT. Owing to the incredible solubility of PA in water and widespread applications in various industries and forensic investigations, it is likely to contaminate soil and groundwater when exposed and is responsible for several health disorders, namely, sycosis, cancer, anemia, cause strong irritation to eye/skin and potential destruction of liver, kidney and respiratory organs. − Hence, there is an urgent need to develop superior methods for monitoring the traces of PA in multiple environments including aqueous solution, contact mode and vapor phase rapidly, to avert terrorist threats as well as monitoring environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Conjugated Polymer Nanoparticles for the Amplified Detection of Nitro-explosive Picric Acid on Multiple Platforms

Malik

Hussain

Kalita

et al. 2015

ACS Appl. Mater. Interfaces

131

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Spontaneously formed conjugated polymer nanoparticles (CPNs) or polymer dots displayed remarkable fluorescence response toward nitroexplosive-picric acid (PA) in multiple environments including 100% aqueous media, solid support using portable paper strips and vapor phase detection via two terminal device. This new cationic conjugated polyelectrolyte (CPE) poly(3,3'-((2-phenyl-9H-fluorene-9,9-diyl)bis(hexane-6,1-diyl))bis(1-methyl-1H-imidazol-3-ium)bromide) (PFMI) was synthesized by Suzuki coupling polymerization followed by post functionalization method without employing any hectic purification technique. Highest quenching constant value (K(sv)) of 1.12 × 10(8) M(-1) and a very low detection limit of 30.9 pM/7.07 ppt were obtained exclusively for PA in 100% aqueous environment which is rare and unique for any CPE/CPNs. Contact mode detection of PA was also performed using simple, cost-effective and portable fluorescent paper strips for achieving on-site detection. Furthermore, the two terminal sensor device fabricated with nanoparticles of PFMI (PFMI-NPs) provides an exceptional and unprecedented platform for the vapor mode detection of PA under ambient conditions. The mechanism for the ultrasensitivity of PFMI-NPs probe to detect PA is attributed to the "molecular-wire effect", electrostatic interaction, photoinduced electron transfer (PET), and possible resonance energy transfer (RET).

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Section: Introductionmentioning

confidence: 99%

Conjugated Polymer Nanoparticles for the Amplified Detection of Nitro-explosive Picric Acid on Multiple Platforms

Malik

Hussain

Kalita

et al. 2015

ACS Appl. Mater. Interfaces

131

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“…TNP is superior to TNT in its explosive power, and in early years, it was widely used as an explosive material because of its shock-sensitive nature . In addition to its military applications, TNP is also used in the fabrication of fireworks, matches, rocket fuels, pharmaceuticals, and dyes. − In addition to its explosive nature, TNP is toxic to the human body and can induce anemia, liver injury, and lung damage. , The abuse of TNP leads to its excess discharge into the environment. As TNP is highly soluble in water, contamination induced by TNP is much severer than that caused by other NACs.…”

Section: Introductionmentioning

confidence: 99%

“…2−4 In addition to its explosive nature, TNP is toxic to the human body and can induce anemia, liver injury, and lung damage. 5,6 The abuse of TNP leads to its excess discharge into the environment. As TNP is highly soluble in water, contamination induced by TNP is much severer than that caused by other NACs.…”

Section: Introductionmentioning

confidence: 99%

Role of the Weak Interactions during the 2,4,6-Trinitrophenol Detecting Process of a Fluorescein-Based Sensor

et al. 2021

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Achieving fast and precise fluorescence sensing of 2,4,6-trinitrophenol (TNP) is of fundamental importance for homeland security and environment protection. Weak interactions between the sensor and an analyte always play a critical role, which is capable of affecting the photophysics of the sensor. This study performs a thorough investigation on the effects of the weak interaction between TNP and a typical fluorescein-based sensor. The photophysics of the sensor before and after interacting with TNP is fully discussed by analyzing the potential energy surface (PES) of the sensor and rate constants of the excited-state dynamic processes. TNP is found to affect the PES greatly, which plants an intermolecular electron transfer state (dark state) below the bright state. The π−π interaction is proved to induce considerable orbital overlaps between the analyte and the sensor, which facilitates the electron transfer process and generates the dark state.

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Targeting chemicals for waste minimization

Cited by 2 publications

References 0 publications

Conjugated Polymer Nanoparticles for the Amplified Detection of Nitro-explosive Picric Acid on Multiple Platforms

Conjugated Polymer Nanoparticles for the Amplified Detection of Nitro-explosive Picric Acid on Multiple Platforms

Role of the Weak Interactions during the 2,4,6-Trinitrophenol Detecting Process of a Fluorescein-Based Sensor

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