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We report a comprehensive description of the transformation pathway from one CdSe nanospecies displaying an absorption doublet at 373\/393\u2005nm to another species with a doublet at 433\/460\u2005nm. These two nanospecies are zero\u2010dimensional (0D) magic\u2010size clusters (MSCs) with 3D quantum confinement, and are labeled dMSC\u2010393 and dMSC\u2010460, respectively. Synchrotron\u2010based small\u2010angle X\u2010ray scattering (SAXS) returns a radius of gyration of 0.92\u2005nm for dMSC\u2010393 and 1.14\u2005nm for dMSC\u2010460, and indicates that both types are disc shaped with the exponent of the SAXS form factor equal to 2.1. The MSCs develop from their unique counterpart precursor compounds (PCs), which are labeled PC\u2010393 and PC\u2010460, respectively. For the dMSC\u2010393 to dMSC\u2010460 transformation, the proposed PC\u2010enabled pathway is comprised of three key steps, dMSC\u2010393 to PC\u2010393 (Step\u20051), PC\u2010393 to PC\u2010460 (Step\u20052 involving monomer addition), and PC\u2010460 to dMSC\u2010460 (Step\u20053). The present study provides a framework for understanding the PC\u2010based evolution of MSCs and how PCs enable transformations between MSCs.<\/jats:p>","DOI":"10.1002\/anie.202104986","type":"journal-article","created":{"date-parts":[[2021,5,8]],"date-time":"2021-05-08T16:31:32Z","timestamp":1620491492000},"page":"20358-20365","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Transformation Pathway from CdSe Magic\u2010Size Clusters with Absorption Doublets at 373\/393\u2005nm to Clusters at 434\/460\u2005nm"],"prefix":"10.1002","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2219-6230","authenticated-orcid":false,"given":"Jinming","family":"Zhu","sequence":"first","affiliation":[{"name":"Institute of Atomic and Molecular Physics Sichuan University  Chengdu Sichuan 610065 P. R. 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