Distinct Speciation of Naphthalene Vapor Deposited on Ice Surfaces at 253 or 77 K: Formation of Submicrometer-Sized Crystals or an Amorphous Layer
| Authors | |
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| Year of publication | 2018 |
| Type | Article in Periodical |
| Magazine / Source | Journal of Physical Chemistry C |
| MU Faculty or unit | |
| Citation | |
| Web | https://pubs.acs.org/doi/10.1021/acs.jpcc.8b03972 |
| Doi | http://dx.doi.org/10.1021/acs.jpcc.8b03972 |
| Keywords | POLYCYCLIC AROMATIC-HYDROCARBONS; EXPERIMENTAL-COMPUTATIONAL APPROACH; ACETIC-ACID; NITRIC-ACID; SPECTROSCOPIC PROPERTIES; HYDROGEN-CHLORIDE; ATMOSPHERIC CHEMISTRY; FLUORESCENCE-SPECTRA; PHYSICAL ADSORPTION; ORGANIC-MOLECULES |
| Description | Naphthalene was deposited from the vapor phase on ice surfaces at 77 or 253 K to yield strongly distinct behavior, forming either an amorphous glass layer or submicrometer-sized crystals, respectively. The results stand upon optical emission spectroscopy combined with differential scanning calorimetry and X-ray analysis. The amorphous layer of naphthalene on the ice behaves in the same manner as on an inert metallic support: it starts to relax at 105 K and crystallizes at 185 K. The formed microcrystals exhibit distinct absorption behavior on the ice surface and are thus expected to have a photokinetic profile varying from freeze-concentrated solutions. The observations bring implications toward environmental and extraterrestrial ice sciences. |
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