TY - JOUR
T1 - Precipitation reactions in water clusters
AU - Fox, Brigitte S.
AU - Beyer, Martin K.
AU - Achatz, Uwe
AU - Joos, Stefan
AU - Niedner-Schatteburg, Gereon
AU - Bondybey, Vladimir E.
PY - 2000/2/17
Y1 - 2000/2/17
N2 - The reactions of hydrated metal cations Ag+(H2O)n, n = 11-26, and Na+(H2O)n, n = 12-28, with HCl were studied by FT-ICR mass spectrometry. One observes an efficient fragmentation due both to collisions and to blackbody radiation, as well as ligand exchange reactions. The number of HCl molecules which can be stabilized in a cluster depends on the number of H2O ligands. In the case of Na+(H2O)n clusters, 12 and 15 H2O ligands are needed to "dissolve" 1 and 2 HCl molecules, respectively, results very similar to H+(H2O)n. On the other hand, in the case of hydrated silver cations, only 4 and 7 H2O molecules are necessary to stabilize 1 and 2 HCl molecules. The difference is due to the fact that many water ligands are needed to stabilize the HCl and NaCl species which are ionically dissolved, while much less water is needed in the case of hydrated Ag+ cations, which form within the cluster a covalently bound AgCl. The observed behavior reflects the large difference in the solubility products of NaCl and AgCl and shows that an analogue to bulk precipitation reaction occurs on a molecular level in clusters.
AB - The reactions of hydrated metal cations Ag+(H2O)n, n = 11-26, and Na+(H2O)n, n = 12-28, with HCl were studied by FT-ICR mass spectrometry. One observes an efficient fragmentation due both to collisions and to blackbody radiation, as well as ligand exchange reactions. The number of HCl molecules which can be stabilized in a cluster depends on the number of H2O ligands. In the case of Na+(H2O)n clusters, 12 and 15 H2O ligands are needed to "dissolve" 1 and 2 HCl molecules, respectively, results very similar to H+(H2O)n. On the other hand, in the case of hydrated silver cations, only 4 and 7 H2O molecules are necessary to stabilize 1 and 2 HCl molecules. The difference is due to the fact that many water ligands are needed to stabilize the HCl and NaCl species which are ionically dissolved, while much less water is needed in the case of hydrated Ag+ cations, which form within the cluster a covalently bound AgCl. The observed behavior reflects the large difference in the solubility products of NaCl and AgCl and shows that an analogue to bulk precipitation reaction occurs on a molecular level in clusters.
UR - http://www.scopus.com/inward/record.url?scp=0001226809&partnerID=8YFLogxK
U2 - 10.1021/jp993303s
DO - 10.1021/jp993303s
M3 - Article
AN - SCOPUS:0001226809
SN - 1089-5639
VL - 104
SP - 1147
EP - 1151
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
IS - 6
ER -