In this respect, the supramolecular structure of cytosine coupled with uracil acidic derivatives can be regarded as a model in the solid phase of molecular recognition based on proton-transfer reactions.
VOC detection is based on proton-transfer reaction mass spectrometry which has currently a response time of ca. 0.8 s and the system is suitable for making nearly unattended, long-term and continuous measurements of VOC fluxes.
In this study, a method based on Proton-Transfer-Reaction Mass Spectrometry (PTR-MS) has been developed in combination with a developed model to determine the mass transfer coefficients of volatile sulfur compounds for selected packing material used in biofilters.
The first was based on the proton transfer between the monosubstituted DBMX and CpNa giving a transcient monobrominate carbanion which is the propagating species of a polyanionic substitution.
This finding is in agreement with the previous work by Coon and colleagues that demonstrated that an alternative TMT purification technique based on a proton transfer reaction (PTR) also improves quantitative accuracy.
To verify the role of α-farnesene and 6M5H2one in the process, these two volatile organic compounds (VOCs) were measured using a PTR-ToF-MS, the new version of a mass spectrometer based on a proton transfer reaction [[ 82]].
Striking differences and similarities are observed among the three mutants yielding novel information on proton transfer mechanism, rates, isotope effects, H-bond strength and proton wire stability.
The computations discussed here are focused on two metal (Mg) ion catalysis where either one proton transfers from the primer 3′-hydroxyl (3′-OH) or, additionally, another proton transfers to form a protonated pyrophosphate (PPiH).
