[Chem EurJ] The phosphorylation of nucleosides and their subsequent polymerization are key issues in the study of the Origins of Life. How these chemical processes took place on primitive Earth […]
organic chemistry
Posted inEnceladus
Enceladus Offers Clues In The Search For Extraterrestrial Life
[Free University Berlin] With a global ocean of liquid water below a thick crust of ice, Saturn’s moon Enceladus is one of the most promising places to search for life […]
Posted inAstrochemistry
Thioacetaldehyde (CH3CHS) On Interstellar Ices: A Key Molecule To Unravel Two Chemical Dichotomies In The ISM
[astro-ph.GA] Thioacetaldehyde (CH3CHS), recently detected in TMC-1, has an abundance approximately 36 times lower than its oxygen analog, acetaldehyde (CH3CHO). This makes the CH3CHS/CH3CHO pair the one with the largest […]
![Comparison of isovalent species including sulfinothioic acid (1a, HSS(O)H) and recently detected hydrogen trioxide (trans‐/cis‐HOOOH). The calculated geometries of 1a were completed at the CCSD(T)‐F12/cc‐pVTZ‐F12 level of theory. This geometry is compared with calculated geometries of hydrogen trioxide from Bai et al. [17]. -- Agendwante Chemie via PubMed](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Interstellar-Ice.jpg?resize=1200%2C722&ssl=1)
Posted inAstrochemistry
Interstellar Ice Chemistry Yields Elusive Sulfinothioic Acid (HS(O)SH)
[Agendwante Chemie via PubMed]. Low-oxidation-state sulfur oxyacids are key yet experimentally elusive intermediates in interstellar sulfur chemistry; even the simplest member, sulfinothioic acid (HS(O)SH), has neither been detected in space […]
![Ratio maps involving the PAH7.7 feature and the F1500W synthetic photometry applied to the MRS cubes for ASPECS galaxies. The first row of panels shows the maps of the total PAH7.7 feature to the synthetic F1500W photometry. Ratios above 1 are possible because the wings of the PAH feature extend well beyond the filter (see text for details and Donnan et al. 2026b). The second row of panels is the fraction of PAH7.7 feature within the F1500W filter to the synthetic F1500W photometry. The third row of panels is the same as the second but for the fraction of continuum emission within the F1500W to the synthetic F1500W photometry -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/PAHSPECS.png?resize=1200%2C718&ssl=1)
Posted inAstrochemistry
PAHSPECS: JWST/MIRI Spectroscopy Of PAHs at Cosmic Noon
[astro-ph.GA] The physical conditions of the interstellar medium (ISM) are thought to differ greatly at high redshifts compared to local galaxies. Polycyclic aromatic hydrocarbons (PAHs) are key ISM constituents, mediating […]
Posted inBiosignatures & Paleobiology
On-demand Microfluidic Synthesis Of Silver Nanoparticles For SERS Detection Of Organic Compounds: A Preliminary Feasibility Study For Astrobiology Applications
[Spectrochimica Acta Part A] The detection of organic molecules at trace concentration levels remains a critical challenge for astrobiology research.
![Orbit of 3I/ATLAS showing the 17 UVES/VLT observing epochs. Open and filled circles represent pre- and post-perihelion observations, respectively. Planet positions with filled circles are shown for the date of perihelion. The open diamond marks Earth’s position at the discovery of 3I/ATLAS, while the open circles along Earth’s orbit indicate its position at each observing epoch. [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/High-resolution.png?resize=1200%2C720&ssl=1)
Posted inComets and Asteroids
High-resolution Optical Spectroscopy Reveals The Distinctive Volatile Composition Of The Interstellar Comet 3I/ATLAS
[astro-ph.EP] Comets preserve volatile material from the early stages of planetary-system formation. The discovery of the interstellar comet 3I/ATLAS enables a direct comparison between a comet formed around another star […]
![LDPI–ReTOF mass spectrum obtained after the deposition of 40 ML pure NH3 ice at 15 K (red), without VUV irradiation. A reference mass spectrum obtained for a bare, clean substrate is presented for comparison (black). The spectra are offset for clarity -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Quantifying.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry
Quantifying The Temperature-dependent Yields Of N2 And N2H4 Formation In Vacuum-ultraviolet-irradiated NH3 Ice
[astro-ph.IM] Gas–grain astrochemical models predict that a substantial fraction of elemental nitrogen in dense cores and protoplanetary disks is locked in molecular nitrogen (N2), in the gas or ice phase, […]
Posted inAtmospheres, Climate, Weather
Optical Constants of Photochemical Haze Analogs in N2-CH4-CO Atmospheres from 0.4 to 28.6 μm
[astro-ph.EP] Photochemical hazes play an important role in shaping the spectra and radiative balance of N2-dominated planetary atmospheres.
Posted inAstrochemistry
Rotational Spectroscopy And Astronomical Search Of Propane-1-thiol (CH3CH2CH2SH) And Propane-2-thiol ((CH3)2CHSH)
[astro-ph.GA] This study focuses on propanethiol (or propyl mercaptan, C3H7SH), a sulfur analogue of propanol and a key target for investigating interstellar sulfur chemistry. We report the laboratory rotational spectroscopic […]