Selective and Efficient Detection of Nitro-Aromatic Explosives in Multiple Media including Water, Micelles, Organogel, and Solid Support

Dey, Nilanjan; Samanta, Suman K.; Bhattacharya, Santanu

doi:10.1021/am401608q

Cited by 177 publications

(116 citation statements)

References 58 publications

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“…This indicates the possibility of TCPA&PA complex formation. 37 A similar observation could be also noted in the progress of the formation of TCEPA&PA (Fig. S1, ESI †).…”

Section: Resultssupporting

confidence: 79%

Self-assembled triphenylamine derivative for trace detection of picric acid

Lei

2014

RSC Adv.

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Detection of explosives is of utmost importance due to the threat to human security as a result of illegal transport and terrorist activities. Picric acid (PA) is widely used in the industrial and military fields, and is inadvertently able to contaminate the environment and groundwater, posing a threat to human health.Achieving the detection of explosives at the parts per billion (ppb) level using chemosensors is a great challenge. Herein, we demonstrate that triphenylamine based fluorescent chemosensors tris(4 0 -carbethoxybiphenyl) amine (TCEPA) and tris(4 0 -carboxybiphenyl) amine (TCPA) exhibit superior detection capability for PA in solution state at the ppb level (40 ppb and 5 ppb respectively) and efficient quenching behaviours in the vapor phase at room temperature. In addition, fluorescent test strips have been prepared by dip-coating Thin Layer Chromatography (TCL) for trace detection of PA at the attogram level.

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“…This indicates the possibility of TCPA&PA complex formation. 37 A similar observation could be also noted in the progress of the formation of TCEPA&PA (Fig. S1, ESI †).…”

Section: Resultssupporting

confidence: 79%

Self-assembled triphenylamine derivative for trace detection of picric acid

Lei

2014

RSC Adv.

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“…There are lots of reports of detecting this poly nitro aromatics5960 but selective detection is much less. Among the highly explosive poly nitro aromatic compounds picric acid is the most devastating one.…”

Section: Discussionmentioning

confidence: 99%

On-line Ammonia Sensor and Invisible Security Ink by Fluorescent Zwitterionic Spirocyclic Meisenheimer Complex

Das

Pramanik

Haldar

2017

Sci Rep

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Ammonia is not only a highly important gas for civilization but also contribute significantly for climate change and human health hazard. Highly sensitive ammonia sensor has been developed from a fluorescent zwitterionic spirocyclic Meisenheimer complex. Moreover, formation of this Meisenheimer complex can also be utilized for selective as well as naked eye instant detection of nitro aromatic explosive picric acid. The presence of a quaternary nitrogen atom directly attached to the spiro carbon is the unique feature of this Meisenheimer complex. This excellent photoluminescent (PL) Meisenheimer complex has two distinct stimuli responsive sites. One is sensitive towards acid while the other one is towards the base. These two positions can be modulated by adding one equivalent acid and one equivalent base to result two new products which are non fluorescent. One of these two non fluorescent species was found very exciting because of its UV/Vis transparency. Utilizing this concept we have fabricated an on-line sensor for measuring ammonia in dry or humid and condensing sewer air. The sensor was robust against ambient temperature and humidity variation. We have also developed an invisible ink from this Meisenheimer complex, with potential application for security purpose.

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“…Although these techniques have some advantages,none of them is ideal due to certain features such as being time consuming, expensive, lack of portability,and requiring delicate equipment.These methods also normally confined to a laboratory environment and must be operated by a trained technician.With considering these limitationsand the importance of explosive detection,major efforts have been started for developing sensitive, fast and inexpensive detection systemsthat could be used easily foron-site identification [16]. Among these efforts, Nanotechnology has played a pivotal role in production of nanosensors with low cost, portability, specificity, and ability in rapid identification.Progresses in development of nanomaterials indicate the considerablepotential in creating nanosensors for detecting explosives Page 5 of 46 A c c e p t e d M a n u s c r i p t 3 with high sensitivity.This review focuses on therecent advancesin the use of nanomaterials for the trace detection of explosives.…”

Section: Introductionmentioning

confidence: 99%