{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T18:33:43Z","timestamp":1760985223249,"version":"3.41.2"},"reference-count":36,"publisher":"AIP Publishing","issue":"3","funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["RO 907\/15"],"award-info":[{"award-number":["RO 907\/15"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2015,1,21]]},"abstract":"<jats:p>Applying the field-cycling nuclear magnetic resonance technique, the frequency dependence of the 1H spin-lattice relaxation rate, R1\u03c9=T1\u22121\u03c9, is measured for propylene glycol (PG) which is increasingly diluted with deuterated chloroform. A frequency range of 10 kHz\u201320 MHz and a broad temperature interval from 220 to about 100 K are covered. The results are compared to those of experiments, where glycerol and o-terphenyl are diluted with their deuterated counter-part. Reflecting intra- as well as intermolecular relaxation, the dispersion curves R1\u03c9,x (x denotes mole fraction PG) allow to extract the rotational time constant \u03c4rot(T, x) and the self-diffusion coefficient D(T, x) in a single experiment. The Stokes-Einstein-Debye (SED) relation is tested in terms of the quantity D(T, x) \u03c4rot(T, x) which provides a measure of an effective hydrodynamic radius or equivalently of the spectral separation of the translational and the rotational relaxation contribution. In contrast to o-terphenyl, glycerol and PG show a spectral separation much larger than suggested by the SED relation. In the case of PG\/chloroform mixtures, not only an acceleration of the PG dynamics is observed with increasing dilution but also the spectral separation of rotational and translational relaxation contributions continuously decreases. Finally, following a behavior similar to that of o-terphenyl already at about x = 0.6; i.e., while D(T, x) \u03c4rot(T, x) in the mixture is essentially temperature independent, it strongly increases with x signaling thus a change of translational-rotational coupling. This directly reflects the dissolution of the hydrogen-bond network and thus a change of solution structure.<\/jats:p>","DOI":"10.1063\/1.4904719","type":"journal-article","created":{"date-parts":[[2015,1,20]],"date-time":"2015-01-20T18:17:47Z","timestamp":1421777867000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":19,"title":["Change of translational-rotational coupling in liquids revealed by field-cycling 1H NMR"],"prefix":"10.1063","volume":"142","author":[{"given":"R.","family":"Meier","sequence":"first","affiliation":[{"name":"Universit\u00e4t Bayreuth Experimentalphysik II, , D-95440 Bayreuth, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E.","family":"Schneider","sequence":"additional","affiliation":[{"name":"Universit\u00e4t Bayreuth Experimentalphysik II, , D-95440 Bayreuth, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E. 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