Chemists synthesize a new dye particularly suitable for the inconspicuous labelling of textiles
Technology based on the use of high-performance lasers and sensors for the generation and detection of infrared light promises to be one of the key technologies of the 21st century. Realization of this goal will require the use of dyes that absorb light specifically in the near-infrared region of the spectrum, and such compounds are therefore of special interest to both researchers and commercial firms. One class of chemicals that show great potential in this area are the so-called peri-arylenes which, thanks to their excellent stability properties, are already being used in a wide range of technical applications. A research team led by LMU chemist Professor Heinz Langhals now reports the synthesis of the first peri-arylene consisting of six basic subunits, whose absorption spectrum is almost entirely confined to the near-infrared (NIR) region. In other words, the substance appears colorless to the human eye, and this makes it suitable for...