Formation of protonated water–hydrogen clusters in an ion trap mass spectrometer at room temperature

Abstract

Protonated water-hydrogen clusters [H+(H2O)n•m(H2)] present interesting model for the fundamental water research, but their formation and isolation presents considerable experimental challenge. Here we report the detection of [H+(H2O)n•m(H2)] (2≤n≤3, m≤2)...

Evidence for the co-existence of isomers of water dimer radical cations and their inter-conversion in a linear ion trap

“…The mass spectrometer was coupled with a closed, home-built ambient corona discharge ion source. Details of the ion source can be found in previous reports from our laboratory [ 17 , 18 ]. Briefly, as shown in Fig.…”

“…Briefly, as shown in Fig. S1 , a stainless-steel discharge needle with an outer diameter (OD) of 150 μm, sharp tip (curvature radius 7.5 μm) and an insulator on the back end was fixed co-axially with two fused silica capillaries using ferrules [ 17 , 18 ]. Ultra-pure water, which was not used in this work, could be introduced through the inner fused silica capillary (ID 0.25 mm, OD 0.40 mm).…”

“…On one hand, (H 2 O) n •+ could be generated through the ionization of water due to the strong electric field at the micro-droplet interface [ 15 ]. On the other hand, (H 2 O) n •+ could be generated in water vapor plasma, which is produced under mild corona discharge [ 16 ], which provides a facile approach to access the high reactivity of water radical cations under ambient conditions [ 17 , 18 ].…”

Nitrogen Fixation by Benzene into Pyridine and Aniline in Water/Nitrogen Plasma

“…The MS instrument was coupled with a home-built low-energy ambient corona discharge device with two channels for ion generation. Details of the ionization source are given in our previous reports. , …”

“…Details of the ionization source are given in our previous reports. 16,17 Briefly, N + (OH 2 ) 2 cations were generated via the corona discharge-channel (Figure S1). A stainless steel needle (outer diameter (OD) of 150 μm) with a sharp tip (curvature radius of 7.5 μm) and an insulator at the back end was inserted coaxially into a fused silica capillary (ID 0.25 mm, OD 0.40 mm).…”