|
|
|
First measurement of the symmetric proton transfer in formic acid dimers
|
 |
In nature, hydrogen bonds play an important role. The structure of the DNA double helix
is determined by double and triple hydrogen bonds. The binding energy of hydrogen bonds
with approximately 10 kJ/mol is of medium strength between chemical bonds (~100 kJ/mol)
and van-der-Waals interactions (~1 kJ/mol).
Formic acid dimer is the smallest organic prototype with a double hydrogen bond.
For the first time we were able to measure the time constant of the proton transfer
of formic acid dimer by studying the isotope dimer (DCOOH)2.
|
Publications:
A. Gutberlet, G.W. Schwaab and M. Havenith
High resolution IR spectroscopy of the carbonyl stretch of (DCOOD)2
submitted
M. Ortlieb, M. Havenith
Proton transfer in (HCOOH)2: An high resolution spectroscopic study of the antisymmetric C-O stretch
J. Phys. Chem. A, accepted (2007) (Roger Miller
memorial issue)
M. Havenith
Coherent proton tunneling in hydrogen bonds of isolated molecules: carboxylic dimers Hydrogen-Transfer Reactions
Volume 1, 33-53, edited by J.T. Hynes, J.P. Klinman,
H.-H. Limbach, R.L. Schowen, Whiley-VCH (2007).
F. Madeja, M. Havenith
High resolution spectroscopy of carboxylic acid in the gas phase: observation of proton transfer in (DCOOH)2
J. Chem. Phys. 117, 7162 (2002).
|
|
|
