{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T11:06:15Z","timestamp":1753873575333,"version":"3.41.2"},"reference-count":67,"publisher":"AIP Publishing","issue":"10","funder":[{"DOI":"10.13039\/501100002341","name":"Academy of Finland","doi-asserted-by":"crossref","award":["KUMURA 1277993"],"award-info":[{"award-number":["KUMURA 1277993"]}],"id":[{"id":"10.13039\/501100002341","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Funda\u00c3\u00a7\u00c3\u00a3o para a Ci\u00c3\u00aancia e a Tecnologia","award":["SFRH\/BPD\/77276\/2011"],"award-info":[{"award-number":["SFRH\/BPD\/77276\/2011"]}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2015,9,14]]},"abstract":"<jats:p>Acetic acid (AA) dimers are studied experimentally by infrared spectroscopy in a N2 matrix and theoretically at the MP2\/6-311++G(2d,2p) level of approximation. This work is focused on the first preparation and characterization of structures containing the higher-energy (cis) conformer of AA. Nine trans-trans, fourteen trans-cis, and six cis-cis dimers are theoretically predicted. Five trans-trans and a number of trans-cis dimers are identified in the experiments, but no indication of cis-cis dimers is found. Two trans-trans dimers and the trans-cis dimers are reported for the first time. One trans-cis dimer is prepared by selective vibrational excitation of the structurally related trans-trans dimer, which converts one of the trans subunits to the cis form. Several trans-cis dimers are obtained by annealing of a matrix containing both trans and cis monomers of AA. Tunneling-induced conversion of the trans-cis dimers into trans-trans forms (including two new trans-trans forms) is observed at low temperatures.<\/jats:p>","DOI":"10.1063\/1.4929575","type":"journal-article","created":{"date-parts":[[2015,9,9]],"date-time":"2015-09-09T17:20:02Z","timestamp":1441819202000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":8,"title":["Acetic acid dimers in a nitrogen matrix: Observation of structures containing the higher-energy conformer"],"prefix":"10.1063","volume":"143","author":[{"given":"Susy","family":"Lopes","sequence":"first","affiliation":[{"name":"University of Coimbra 1 Department of Chemistry, , Rua Larga, P-3004-535 Coimbra, Portugal"}]},{"given":"Alexandra V.","family":"Domanskaya","sequence":"additional","affiliation":[{"name":"Georg-August University 2 Institute of Physical Chemistry, , Tammannstr 6, D-37077 G\u00f6ttingen, Germany"}]},{"given":"Markku","family":"R\u00e4s\u00e4nen","sequence":"additional","affiliation":[{"name":"University of Helsinki 3 Department of Chemistry, , P.O. 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Phys."},{"key":"2023073021301880600_c60","unstructured":"See supplementary material at http:\/\/dx.doi.org\/10.1063\/1.4929575  for for Tables SI\u2013SIII with calculated IR spectra of AA dimers; Table SIV with revised assignments of bothtrans and cisforms of AA monomer in a N2matrix, previous data for these species in an Ar matrix and the calculated spectra [MP2\/6\u2013311++G(2d,2p)]; Table SV with the characteristic calculated shifts due to complexation for all dimers; Figure S1 with the NIR spectrum oftrans-AA in a N2 matrix measured at 9.5 K after annealing at 20 K for 10 min."},{"key":"2023073021301880600_c61","doi-asserted-by":"publisher","first-page":"2735","DOI":"10.1021\/jp512005h","volume":"119","year":"2015","journal-title":"J. Phys. Chem. A"},{"key":"2023073021301880600_c62","doi-asserted-by":"publisher","first-page":"2628","DOI":"10.1021\/jp509692b","volume":"119","year":"2015","journal-title":"J. Phys. Chem. 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