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Here, we report the discovery of nanoscale helical junctions directed by a molecular chiral junction derived from a meso\u2010form lipid emitter with two heterochiral centers. Unlike enantiopure molecules, which assemble into uniform homochiral fibers, the meso\u2010form molecule self\u2010assembles into planar belts in pure DMSO and striking helical heterojunctions with opposite\u2010handed portions in DMSO\/H\n                    <jats:sub>2<\/jats:sub>\n                    O 9:1 (v\/v). Spectroscopic and structural analyses reveal that solvent polarity and stereochemical configuration govern distinct packing modes and hierarchical chirality amplification. This unprecedented molecular\u2010to\u2010supramolecular transformation provides a new paradigm for chirality engineering, offering mechanistic insights into chiral self\u2010assembly and opening opportunities for advanced chiroptical materials.\n                  <\/jats:p>","DOI":"10.1002\/chir.70089","type":"journal-article","created":{"date-parts":[[2026,2,17]],"date-time":"2026-02-17T10:54:42Z","timestamp":1771325682000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Nanoscale Helical Heterojunctions From a \u03c0\u2010Conjugated Emitter With Two Heterochiral Centers"],"prefix":"10.1002","volume":"38","author":[{"given":"Xujin","family":"Qin","sequence":"first","affiliation":[{"name":"Beijing National Laboratory for Molecular Sciences, CAS Research\/Education Center for Excellence in Molecular Sciences Institute of Chemistry, Chinese Academy of Sciences  Beijing China"},{"name":"University of Chinese Academy 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