  Polycyclic aromatic hydrocarbons (PAHs) play a key role in the chemical and
hydrodynamical evolution of the atmospheres of exoplanets and planet-forming
discs. If they can survive the planet formation process, PAHs are likely to be
involved in pre-biotic chemical reactions eventually leading to more complex
molecules such as amino acids and nucleotides, which form the basis for life as
we know it. However, the abundance and specific role of PAHs in these
environments is largely unknown due to limitations in sensitivity and range of
wavelength of current and previous space-borne facilities. Upcoming infrared
space spectroscopy missions, such as Twinkle and Ariel, present a unique
opportunity to detect PAHs in the atmospheres of exoplanets and planet-forming
discs. In this work we present synthetic observations based on conservative
numerical modeling of typical planet-forming discs and a transiting hot
Saturnian planet around solar type star. Our models show that Twinkle and Ariel
might both be able to detect the 3.3 micron PAH feature within reasonable
observing time in discs and transiting planets, assuming that PAHs are present
with an abundance of at least one tenth of the interstellar medium value.
