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A novel design of a temperature-controlled FT-ICR cell for low-temperature black-body infrared radiative dissociation (BIRD) studies of hydrated ions

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: O. Petru Balaj, Christian B. Berg, Stephan J. Reitmeier, Vladimir E. Bondybey and Martin K. Beyer

Editorial: International Journal of Mass Spectrometry, 279 (1), p.5-9 , 2009.

Rezumat:

A novel design for a temperature-controlled ICR cell is described for use in black-body infrared radiative dissociation (BIRD) studies of weakly bound systems like water clusters. Due to several improved design features, it provides a very uniform black-body radiation environment, and at the same time maintains efficient pumping for a low collision rate on the order of 10^-2 s^-1. At the lowest temperatures reached, nominally 89 K cell plate temperature, water evaporation effectively ceases, while intracluster reactions in V+(H2O)n with a small activation energy are still observed. BIRD rate constants for Ag+(H2O)n, n = 4–6, are shown in the temperature range T = 160–320 K. For n = 6, a linear Arrhenius plot with R^2 = 0.9943 is obtained without any calibration, confirming the suitability of the cell for quantitative BIRD studies.

Cuvinte cheie: Molecular clusters; Black-body radiation; FT-ICR mass spectrometry; Intracluster reactions

URL: http://dx.doi.org/10.1016/j.ijms.2008.09.001