TY - BOOK AU - Teunissen,E.H. AU - Jacobs,W.P.J.H. AU - Jansen,A.P.J. AU - Van Santen,R.A. TI - Spectroscopy, energetics and siting of NH+ 4 in zeolites; theory and experiment N2 - The adsorption of an ammonia molecule onto an acidic zeolite and the proton transfer from the zeolite to the ammonia are studied by quantum chemical methods. The NH^~ is adsorbed with two or three hydrogen bonds to the zeolite. The calculated vibrational frequencies explain the experimental infra-red spectra UR - https://drive.google.com/file/d/1KsjYBY1YNA2gPnAkOrV06hWxCEeDYQIT/view?usp=drivesdk ER -