title: Photooxidation of Trimethyl Phosphite in Nitrogen, Oxygen, and para-Hydrogen Matrixes at Low Temperatures.
abstract: Trimethyl phosphite (TMPhite) was photooxidized to trimethyl phosphate (TMP) in N2, O2, and para-H2matrixes at low temperatures to correlate the conformational landscape of these two molecules. The photooxidation produced the trans (TGG)-rich conformer with respect to the ground state gauche (GGG) conformer of TMP in N2and O2matrixes, which has diverged from the conformational composition of freshly deposited pure TMP in the low-temperature matrixes. The enrichment of the trans conformer in preference to the gauche conformer of TMP during photooxidation is due to the TMPhite precursor, which exists exclusively in the trans conformer. Interestingly, whereas the photooxidized TMP molecule suffers site effects possibly due to the local asymmetry in N2and O2matrixes, in the para-H2matrix owing to the quantum crystal nature the site effects were observed to be self-repaired.
authors.affiliation: Materials Chemistry and Metal Fuel Cycle Group and ‡Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research , Kalpakkam-603102, India.
authors.forename: N
authors.initials: N
authors.lastname: Ramanathan
authors.affiliation: Materials Chemistry and Metal Fuel Cycle Group and ‡Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research , Kalpakkam-603102, India.
authors.forename: K
authors.identifier: http://orcid.org/0000-0002-9961-0030
authors.initials: K
authors.lastname: Sundararajan
authors.affiliation: Materials Chemistry and Metal Fuel Cycle Group and ‡Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research , Kalpakkam-603102, India.
authors.forename: R
authors.initials: R
authors.lastname: Gopi
authors.affiliation: Materials Chemistry and Metal Fuel Cycle Group and ‡Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research , Kalpakkam-603102, India.
authors.forename: K
authors.initials: K
authors.lastname: Sankaran