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Relevant academic research and scientific papers

Dual mode selective detection and differentiation of TNT from other nitroaromatic compounds

Selective detection of explosives, especially TNT, is a highly desirable area of research and various explosives detection devices including fluorescent sensors are already in place. However, multi-mode sensors will be more useful and reliable than conventional fluorescent “Turn Off” sensors. One of the challenges is the development of selective sensors to prevent illegal transport of commonly used explosive TNT through on-the-spot analysis. In this context, we report a fluorescent polymer-based selective detection of TNT using both fluorometric and colorimetric signals. In addition, colorimetric differentiation of TNT from other nitroaromatic compounds is made possible by complexing with various amines. Even though many other sensors are available for TNT, the current demonstration is unique in terms of selectivity, sensitivity, reliability, portability, and rapidity of results. The as-developed explosive detection kit can be useful in both civilian and military operations to trace the illegal transport of TNT as well as for post-explosion analysis.

Luminescence Ratiometric Nanothermometry Regulated by Tailoring Annihilators of Triplet–Triplet Annihilation Upconversion Nanomicelles

Triplet–triplet annihilation (TTA) upconversion is a special non-linear photophysical process that converts low-energy photons into high-energy photons based on sensitizer/annihilator pairs. Here, we constructed a novel luminescence ratiometric nanothermo

FLUORESCENT POLYMER FOR THE DUAL MODE SELECTIVE DETECTION OF TNT AT NANOMOLAR LEVEL

The present invention relates to a new fluorescent polymer of Formula I for the dual mode selective detection of TNT at nanomolar level and process for the preparation thereof. The present invention further relates to the process of selective detection of TNT by using the polymers of Formula I and a kit for the detection of TNT thereof.

Reaction type luminous agent 9, 10 - diphenyl anthracene derivative and its preparation method and by the preparation of high-efficient light conversion system

The invention discloses reaction type luminous agent 9, 10 - diphenyl anthracene derivative and its preparation method and by the preparation of high-efficient light conversion system, through the anthracycline 9, 10 - bits into the active group (alcohol

Organic Electroluminescent Device

The present invention relates to the improvement of organic electronic devices, in particular electroluminescent devices, by using compounds which can have a plurality of isomers, where one of these isomers is present in excess.

9,10-diarylanthracenes as molecular switches: Syntheses, properties, isomerisations and their reactions with singlet oxygen

A series of 9,10-diarylanthracenes with various substituents at the ortho positions have been synthesised by palladium-catalysed cross-coupling reactions. Such compounds exhibit interesting physical properties and can be applied as molecular switches. Despite the high steric demand of the substituents, products were formed in moderate-to-good yields. In some cases, microwave conditions further improved yields. Bis-coupling afforded two isomers (syn and anti) that do not interconvert at room temperature. These products were easily separated and their relative stereochemistries were unequivocally assigned by NMR spectroscopy and X-ray analysis. The syn and anti isomers exhibit different physical properties (e.g., melting points and solubilities) and interconversion by rotation around the aryl-aryl axis commences at 300°C for alkyl- or alkoxy-substituted diarylanthracenes. The reactions with singlet oxygen were studied separately and revealed different reactivities and reaction pathways. The yields and reactivities depend on the size and electronic nature of the substituents. The anti isomers form the same 9,10-endoperoxides as the syn species, occasionally accompanied by unexpected 1,4-endoperoxides as byproducts. Thermolysis of the endoperoxides exclusively yielded the syn isomers. The interesting rotation around the aryl-aryl axis allows the application of 9,10-diarylanthracenes as molecular switches, which are triggered by light and air under mild conditions. Finally, the oxygenation and thermolysis sequence provides a simple, synthetic access to a single stereoisomer (syn) from an unselective coupling step.

Novel Materials For Organic Electroluminescent Devices

The present invention relates to novel materials which can be used in organic electronic devices, in particular electroluminescent devices, and are derivatives of fused aromatic systems.