TY - JOUR
T1 - Infrared photodissociation spectroscopy of Al+(CH 3OH)n (n = 1-4)
AU - Furuya, Ari
AU - Tsuruta, Mamoru
AU - Misaizu, Fuminori
AU - Ohno, Koichi
AU - Inokuchi, Yoshiya
AU - Judai, Ken
AU - Nishi, Nobuyuki
PY - 2007/7/12
Y1 - 2007/7/12
N2 - Infrared photodissociation spectra Of Al+(CH3OH) n (n = 1-4) and Al+(CH3OH)n-Ar (n = 1-3) were measured in the OH stretching region, 3000-3800 cm-1. For n= 1 and 2, sharp absorption bands were observed in the free OH stretching region, all of which were well reproduced by the spectra calculated for the solvated-type geometry with no hydrogen bond. For n = 3 and 4, there were broad vibrational bands in the energy region of hydrogen-bonded OH stretching vibrations, 3000-3500 cm-1. Energies of possible isomers for the Al+(CH3-OH)3,4 ions with hydrogen bonds were calculated in order to assign these bands. It was found that the third and fourth methanol molecules form hydrogen bonds with methanol molecules in the first solvation shell, rather than a direct bonding with the Al+ ion. For the Al+(CH3OH)n clusters with n = 1-4, we obtained no evidence of the insertion reaction, which occurs in Al +(H2O)n. One possible explanation of the difference between these two systems is that the potential energy barriers between the solvated and inserted isomers in the Al+(CH 3OH)n system is too high to form the inserted-type isomers.
AB - Infrared photodissociation spectra Of Al+(CH3OH) n (n = 1-4) and Al+(CH3OH)n-Ar (n = 1-3) were measured in the OH stretching region, 3000-3800 cm-1. For n= 1 and 2, sharp absorption bands were observed in the free OH stretching region, all of which were well reproduced by the spectra calculated for the solvated-type geometry with no hydrogen bond. For n = 3 and 4, there were broad vibrational bands in the energy region of hydrogen-bonded OH stretching vibrations, 3000-3500 cm-1. Energies of possible isomers for the Al+(CH3-OH)3,4 ions with hydrogen bonds were calculated in order to assign these bands. It was found that the third and fourth methanol molecules form hydrogen bonds with methanol molecules in the first solvation shell, rather than a direct bonding with the Al+ ion. For the Al+(CH3OH)n clusters with n = 1-4, we obtained no evidence of the insertion reaction, which occurs in Al +(H2O)n. One possible explanation of the difference between these two systems is that the potential energy barriers between the solvated and inserted isomers in the Al+(CH 3OH)n system is too high to form the inserted-type isomers.
UR - http://www.scopus.com/inward/record.url?scp=34547367210&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34547367210&partnerID=8YFLogxK
U2 - 10.1021/jp067622c
DO - 10.1021/jp067622c
M3 - Article
C2 - 17569510
AN - SCOPUS:34547367210
VL - 111
SP - 5995
EP - 6002
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
SN - 1089-5639
IS - 27
ER -