{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T15:00:59Z","timestamp":1767193259156,"version":"build-2065373602"},"reference-count":62,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2021,2,5]],"date-time":"2021-02-05T00:00:00Z","timestamp":1612483200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001409","name":"Department of Science and Technology, Ministry of Science and Technology, India","doi-asserted-by":"publisher","award":["SR\/NM\/NS-1439\/2014"],"award-info":[{"award-number":["SR\/NM\/NS-1439\/2014"]}],"id":[{"id":"10.13039\/501100001409","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The quest to decode the evolution of homochirality of life on earth has stimulated research at the molecular level. In this study, handed mirror symmetry breaking, and molecular parity violation hypotheses of systematically designed \u03c0-conjugated rotamers possessing anthracene and bianthracene core were evinced via circularly polarized luminescence (CPL) and circular dichroism (CD). The CPL signals were found to exhibit a (\u2212)-sign, and a handed dissymmetry ratio, which increased with viscosity of achiral solvents depending on the rotation barrier of rotamers. The time-resolved photoluminescence spectroscopy and quantum efficiency measurement of these luminophores in selected solvents reinforced the hypothesis of a viscosity-induced consistent increase of the (\u2212)-sign handed CPL signals.<\/jats:p>","DOI":"10.3390\/sym13020272","type":"journal-article","created":{"date-parts":[[2021,2,7]],"date-time":"2021-02-07T14:04:13Z","timestamp":1612706653000},"page":"272","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Handed Mirror Symmetry Breaking at the Photo-Excited State of \u03c0-Conjugated Rotamers in Solutions"],"prefix":"10.3390","volume":"13","author":[{"given":"Puhup","family":"Puneet","sequence":"first","affiliation":[{"name":"Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi (IITD), Delhi 110016, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sajan","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi (IITD), Delhi 110016, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3139-9478","authenticated-orcid":false,"given":"Michiya","family":"Fujiki","sequence":"additional","affiliation":[{"name":"Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0036, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bhanu","family":"Nandan","sequence":"additional","affiliation":[{"name":"Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi (IITD), Delhi 110016, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,2,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2028","DOI":"10.1016\/j.tetlet.2010.08.094","article-title":"A likely possible origin of homochirality in amino acids and sugars on prebiotic earth","volume":"52","author":"Breslow","year":"2011","journal-title":"Tetrahedron Lett."},{"key":"ref_2","first-page":"335","article-title":"Thermal Synthesis of Natural Amino-Acids from a Postulated Primitive Terrestrial Atmosphere","volume":"201","author":"Harada","year":"1964","journal-title":"Nat. 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