{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T03:05:13Z","timestamp":1783652713315,"version":"3.55.0"},"reference-count":35,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2021,12,29]],"date-time":"2021-12-29T00:00:00Z","timestamp":1640736000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Appl Spectrosc"],"published-print":{"date-parts":[[2022,1]]},"abstract":"<jats:p>\n                    We have recorded attenuated total reflection infrared spectra of binary mixtures in the (quasi-)ideal systems benzene\u2013toluene, benzene\u2013carbon tetrachloride, and benzene\u2013cyclohexane. We used two-dimensional correlation spectroscopy, principal component analysis, and multivariate curve resolution to analyze the data. The 2D correlation proves nonlinearities, also in spectral ranges with no obvious deviations from Beer\u2019s approximation. The number of principal components is much higher than two and multivariate curve resolution carried out under the assumption of the presence of a third component, results in spectra which only show bands of the original components. The results negate the presence of third components, since any complex should have lower symmetry than the individual molecules and thus more and\/or different infrared-active bands in the spectra. Based on Lorentz\u2013Lorenz theory and literature values of the optical constants, we show that the nonlinearities and additional principal components are consequences of local field effects and the polarization of matter by light. Lorentz\u2013Lorenz theory is, however, not able to explain, for example, the different blueshifts of the strong A\n                    <jats:sub>2u<\/jats:sub>\n                    band of benzene in the three mixtures. Obviously, infrared spectroscopy is sensitive to the short-range order around the molecules, which changes with content, their shapes, and their anisotropy.\n                  <\/jats:p>","DOI":"10.1177\/00037028211056293","type":"journal-article","created":{"date-parts":[[2021,12,29]],"date-time":"2021-12-29T07:00:47Z","timestamp":1640761247000},"page":"92-104","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":41,"title":["Beyond Beer\u2019s Law: Quasi-Ideal Binary Liquid Mixtures"],"prefix":"10.1177","volume":"76","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9396-7365","authenticated-orcid":false,"given":"Thomas G.","family":"Mayerh\u00f6fer","sequence":"first","affiliation":[{"name":"Leibniz Institute of Photonic Technology (IPHT), Jena, Germany"},{"name":"Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Jena, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oleksii","family":"Ilchenko","sequence":"additional","affiliation":[{"name":"The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrii","family":"Kutsyk","sequence":"additional","affiliation":[{"name":"Faculty of Radiophysics, Electronics and Computer Systems, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4257-593X","authenticated-orcid":false,"given":"J\u00fcrgen","family":"Popp","sequence":"additional","affiliation":[{"name":"Leibniz Institute of Photonic Technology (IPHT), Jena, Germany"},{"name":"Institute of Physical Chemistry and Abbe Center of 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