Near-infrared organic compounds and emerging applications.

مروری بر عوامل موثر بر شدت تابش منورهای مادون قرمز دید در شب

The infrared night vision illuminates are a kind of flare that, with radiation in the near infrared range (700-900 nm) cause illuminates the target in the battlefield and night operations. These illuminates have problems such as low infrared radiation, low burning rate, and so on. Many physical and chemical parameters affect the burn rate and radiation intensity. But the most effective paramete...

Near-infrared detection of flow injection analysis by acoustooptic tunable filter-based spectrophotometry.

The instrumentation development of a near-infrared (near-IR) spectrophotometer based on an acoustooptic tunable filter (AOTF) and its application as a detector for flow injection analysis (FIA) are reported. In addition to being compact and all solid state, this AOTF-based instrument is very sensitive, has high resolution, and can be rapidly scanned. The latter advantage make it uniquely suited...

Near-infrared fluorescent pH-sensitive probes via unexpected barbituric acid mediated synthesis.

Novel near-infrared pyrimidine-fused pH fluorescent probes were prepared by an unusual barbiturate-mediated debenzoindolation and subsequent heteroannulation. A plausible mechanistic pathway is proposed, and the final structures were further elucidated by 2D-NMR. All new compounds are highly fluorescent in the near-infrared region and possess excellent spectral sensitivities to environmental pH...

On-chip sensing of volatile organic compounds in water by hybrid polymer and silicon photonic-crystal slot-waveguide devices

Lab-on-chip integrated infrared spectroscopy and sensing with hybrid polymer and silicon photonic crystal slot waveguides is demonstrated for the specific and selective identification of volatile organic compounds, xylene and toluene, in water. A 300 micron long photonic crystal slot waveguide was demonstrated that enabled the detection of 100ppb xylene in water by near-infrared absorption sign...

Applications of near-infrared spectroscopy in temperature modeling of aqueous-based samples and polymer characterization