skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Terahertz VRT spectroscopy of the water hexamer-d 12 prism: Dramatic enhancement of bifurcation tunneling upon librational excitation

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5006195· OSTI ID:1601175
 [1];  [2];  [1]; ORCiD logo [3];  [1];  [1]; ORCiD logo [4]; ORCiD logo [1]
  1. Univ. of California, Berkeley, CA (United States)
  2. Chinese Academy of Sciences (CAS), Beijing (China). CAS Key Lab. of Soft Matter Physics, Beijing National Lab. for Condensed Matter Physics, Institute of Physics
  3. Univ. of California, Berkeley, CA (United States); Ruhr-Univ. Bochum, North Rhine-Westphalia (Germany)
  4. Univ. of Cambridge (United Kingdom)

Using diode laser vibration-rotation-tunneling spectroscopy near 15 Thz (500 cm-1), we have measured and assigned 142 transitions to three a-type librational subbands of the water hexamer-d12 prism. These subbands reveal dramatically enhanced (ca. 1000×) tunneling splittings relative to the ground state. This enhancement is in agreement with that observed for the water dimer, trimer, and pentamer in this same frequency region. The water prism tunneling motion has been predicted to potentially describe the motions of water in interfacial and confined environments; hence, the results presented here indicate that excitation of librational vibrations has a significant impact on the hydrogen bond dynamics in these macroscopic environments.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC02-05CH11231; 1300723.
OSTI ID:
1601175
Journal Information:
Journal of Chemical Physics, Vol. 148, Issue 9; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

References (53)

Water hexamer clusters: Structures, energies, and predicted mid-infrared spectra journal August 2002
Hydrogen bond network rearrangement dynamics in water clusters: Effects of intermolecular vibrational excitation on tunneling rates journal August 2017
Ab initio studies of the water hexamer: near degenerate structures journal January 1991
Hydrogen Bonding and OH-Stretch Spectroscopy in Water: Hexamer (Cage), Liquid Surface, Liquid, and Ice journal December 2012
Monitoring Water Clusters “Melt” Through Vibrational Spectroscopy journal May 2017
Hydrogen Bond Breaking Dynamics of the Water Trimer in the Translational and Librational Band Region of Liquid Water journal June 2001
Structure and torsional dynamics of the water octamer from THz laser spectroscopy near 215 μm. journalarticle January 2016
A long path length pulsed slit valve appropriate for high temperature operation: Infrared spectroscopy of jet‐cooled large water clusters and nucleotide bases journal February 1996
Tunable far infrared laser spectrometers journal July 1991
Terahertz Laser Vibration−Rotation Tunneling Spectroscopy and Dipole Moment of a Cage Form of the Water Hexamer journal November 1997
The water hexamer: Three-body interactions, structures, energetics, and OH-stretch spectroscopy at finite temperature journal September 2012
Ab initio studies of cyclic water clusters (H 2 O) n , n =1–6. I. Optimal structures and vibrational spectra journal December 1993
Ab initio studies of cyclic water clusters (H 2 O) n , n =1–6. II. Analysis of many‐body interactions journal May 1994
Characterization of a cage form of the water hexamer journal June 1996
Structures, binding energies, and spectra of isoenergetic water hexamer clusters: Extensive ab initio studies journal October 1998
Pinning Down the Water Hexamer journal May 2012
Low-Energy Structures and Vibrational Frequencies of the Water Hexamer: Comparison with Benzene-(H2O)6 journal December 1994
The Water Dipole Moment in Water Clusters journal February 1997
IR Spectra of the Water Hexamer: Theory, with Inclusion of the Monomer Bend Overtone, and Experiment Are in Agreement journal March 2013
Hydrogen Bond Cooperativity and the Three-Dimensional Structures of Water Nonamers and Decamers journal October 2014
On the accuracy of density-functional theory exchange-correlation functionals for H bonds in small water clusters. II. The water hexamer and van der Waals interactions journal November 2008
The water dimer I: Experimental characterization journal July 2015
Energetics and Predissociation Dynamics of Small Water, HCl, and Mixed HCl–Water Clusters journal February 2016
The monocyclic water hexamer detected in neon matrices by infrared spectroscopy journal February 2007
PGOPHER: A program for simulating rotational, vibrational and electronic spectra journal January 2017
The symmetry groups of non-rigid molecules journal June 1963
Concerted hydrogen-bond breaking by quantum tunneling in the water hexamer prism journal March 2016
Anharmonic vibrational properties by a fully automated second-order perturbative approach journal January 2005
Structures of Cage, Prism, and Book Isomers of Water Hexamer from Broadband Rotational Spectroscopy journal May 2012
Intermolecular Interaction in Water Hexamer journal November 2010
The Water Hexamer: Cage, Prism, or Both. Full Dimensional Quantum Simulations Say Both journal June 2012
Theoretical Study of the Cage Water Hexamer Structure journal September 1997
Vibrational zero-point energies and thermodynamic functions beyond the harmonic approximation journal February 2004
Hydrogen bond breaking dynamics in the water pentamer: Terahertz VRT spectroscopy of a 20 μ m libration journal January 2017
Far-infrared VRT spectroscopy of the water dimer: Characterization of the 20 μ m out-of-plane librational vibration journal October 2015
Hydrogen Bond Cooperativity and the Three-Dimensional Structures of Water Nonamers and Decamers journal October 2014
Water clusters: Untangling the mysteries of the liquid, one molecule at a time journal September 2001
The curious case of the water hexamer: Cage vs. Prism journal August 2013
Ab initio studies of cyclic water clusters (H 2 O) n , n =1–6. III. Comparison of density functional with MP2 results journal March 1995
Structures of the water hexamer using density functional methods journal September 1994
Structure and torsional dynamics of the water octamer from THz laser spectroscopy near 215 μm journal June 2016
Far-infrared laser vibration–rotation–tunneling spectroscopy of water clusters in the librational band region of liquid water journal March 2001
CCSD(T) Complete Basis Set Limit Relative Energies for Low-Lying Water Hexamer Structures journal April 2009
Analytic MP2 frequencies without fifth-order storage. Theory and application to bifurcated hydrogen bonds in the water hexamer journal March 1994
Formation of Cyclic Water Hexamer in Liquid Helium: The Smallest Piece of Ice journal January 2000
Hydrogen-bond relaxation dynamics: Resolving mysteries of water ice journal February 2015
The Berkeley tunable far infrared laser spectrometers journal July 1991
The Role of Anharmonicity in Hydrogen-Bonded Systems: The Case of Water Clusters journal August 2011
Many-Body Interactions in Ice journal March 2017
Quantum dynamics in the smallest water droplet journal March 2016
The symmetry groups of non-rigid molecules journal January 2002
Getting the Right Answers for the Right Reasons: Toward Predictive Molecular Simulations of Water with Many-Body Potential Energy Functions journal August 2016
Hydrogen-bond relaxation dynamics: Resolving mysteries of water ice text January 2018

Cited By (2)

Highly localized H 2 O librational motion as a far-infrared spectroscopic probe for microsolvation of organic molecules journal January 2019
Thermodynamics and the potential energy landscape: case study of small water clusters journal January 2019