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Resonant ion-dip infrared spectroscopy of the S<inf>4</inf> and D<inf>2d</inf> water octamers in benzene-(water)<inf>8</inf> and benzene<inf>2</inf>-(water)<inf>8</inf>

Gruenloh, CJ and Carney, JR and Hagemeister, FC and Arrington, CA and Zwier, TS and Fredericks, SY and Wood, JT and Jordan, KD (1998) Resonant ion-dip infrared spectroscopy of the S<inf>4</inf> and D<inf>2d</inf> water octamers in benzene-(water)<inf>8</inf> and benzene<inf>2</inf>-(water)<inf>8</inf>. Journal of Chemical Physics, 109 (16). 6601 - 6614. ISSN 0021-9606

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The techniques of resonant two-photon ionization (R2PI), UV-UV (ultraviolet) hole-burning, and resonant ion-dip infrared (RIDIR) spectroscopies have been employed along with density functional theory (DFT) calculations to assign and characterize the hydrogen-bonding topologies of two isomers each of the benzene-(water)8 and (benzene)2(water)8 gas-phase clusters. The BW8 isomers (B=benzene, W=water) have R2PI spectra which are nearly identical to one another, but shifted by about 5 cm-1 from one another. This difference is sufficient to enable interference-free RIDIR spectra to be recorded. As with smaller BWn clusters, the BW8 clusters fragment following photoionization by loss of either one or two water molecules. The OH stretch IR spectra of the two BW8 isomers bear a close resemblance to one another, but differ most noticeably in the double-donor OH stretch transitions near 3550 cm-1. Comparison to DFT calculated minimum energy structures, vibrational frequencies, and infrared intensities leads to an assignment of the H-bonding topology of the BW8 isomers as nominally cubic water octamers of S4 and D2d symmetry surface attached to benzene through a π H-bond. A series of arguments based on the R2PI and hole-burning spectra leads to an assignment of additional features in the R2PI spectra to two isomers of B2W8. The OH stretch RIDIR spectra of these isomers show them to be the corresponding S4 and D2d analogs of B2W8 in which the benzene molecules each form a π H-bond with a different dangling OH group on the W8 sub-cluster. © 1998 American Institute of Physics.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Gruenloh, CJ
Carney, JR
Hagemeister, FC
Arrington, CA
Zwier, TS
Fredericks, SY
Wood, JT
Jordan, KDjordan@pitt.eduJORDAN
Date: 1 December 1998
Date Type: Publication
Journal or Publication Title: Journal of Chemical Physics
Volume: 109
Number: 16
Page Range: 6601 - 6614
DOI or Unique Handle: 10.1063/1.477346
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Refereed: Yes
ISSN: 0021-9606
Date Deposited: 28 Mar 2013 16:24
Last Modified: 22 Jun 2021 12:55


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