{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Yao Z"],"funding":["National Natural Science Foundation of China"],"pagination":["10524-10531"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8695889"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["11(18)"],"pubmed_abstract":["Creating optically pure metal assemblies is a hot research topic in the realms of chiral supramolecules. Here, three new triple-stranded europium(iii) helicates Eu<sub>2</sub>L<sub>3</sub>(L')<sub>2</sub> [L = 4,4'-bis(4,4,4-trifluoro-1,3-dioxobutyl)diphenyl sulphide; L' = 1,10-phenanthroline (Phen) or <i>R</i>/<i>S</i>-2,2'-bis(diphenylphosphinyl)-1,1'-binaphthyl (<i>R</i>/<i>S</i>-BINAPO)] were synthesized in order to investigate the effects of ancillary ligands on controlling the stereoselective self-assembly of lanthanide helicates. X-ray single crystal structure analysis showed that Eu<sub>2</sub>L<sub>3</sub>(Phen)<sub>2</sub> crystalized in an achiral space group <i>P</i>1̄ with the equivalent amount of P and M helicates in one single cell. The isolated Eu<sub>2</sub>L<sub>3</sub>(<i>S</i>-BINAPO)<sub>2</sub> and Eu<sub>2</sub>L<sub>3</sub>(<i>R</i>-BINAPO)<sub>2</sub> were verified to be enantiopure by <sup>1</sup>H, <sup>19</sup>F, <sup>31</sup>P NMR and DOSY NMR analyses. Additionally, the mirror-image CD spectra also demonstrated the successful syntheses of the enantiomers and the presence of an effective chirality transformation from BINAPO to achiral L. Furthermore, the perfect mirror-image circularly polarized luminescence (CPL) spectra of Eu<sub>2</sub>L<sub>3</sub>(<i>S</i>-BINAPO)<sub>2</sub> and Eu<sub>2</sub>L<sub>3</sub>(<i>R</i>-BINAPO)<sub>2</sub> indicated the existence of the excited state chirality of the Eu<sup>3+</sup> center associated with |<i>g</i> <sub>lum</sub>| values reaching 0.112. In addition, the photophysical properties of three helicates were also discussed."],"journal":["RSC advances"],"pubmed_title":["Ancillary ligand modulated stereoselective self-assembly of triple-stranded Eu(iii) helicate featuring circularly polarized luminescence."],"pmcid":["PMC8695889"],"funding_grant_id":["51773054","51872077","520730805"],"pubmed_authors":["Li H","Yao Z","Yan P","Zhou Y","Gao T"],"additional_accession":[]},"is_claimable":false,"name":"Ancillary ligand modulated stereoselective self-assembly of triple-stranded Eu(iii) helicate featuring circularly polarized luminescence.","description":"Creating optically pure metal assemblies is a hot research topic in the realms of chiral supramolecules. Here, three new triple-stranded europium(iii) helicates Eu<sub>2</sub>L<sub>3</sub>(L')<sub>2</sub> [L = 4,4'-bis(4,4,4-trifluoro-1,3-dioxobutyl)diphenyl sulphide; L' = 1,10-phenanthroline (Phen) or <i>R</i>/<i>S</i>-2,2'-bis(diphenylphosphinyl)-1,1'-binaphthyl (<i>R</i>/<i>S</i>-BINAPO)] were synthesized in order to investigate the effects of ancillary ligands on controlling the stereoselective self-assembly of lanthanide helicates. X-ray single crystal structure analysis showed that Eu<sub>2</sub>L<sub>3</sub>(Phen)<sub>2</sub> crystalized in an achiral space group <i>P</i>1̄ with the equivalent amount of P and M helicates in one single cell. The isolated Eu<sub>2</sub>L<sub>3</sub>(<i>S</i>-BINAPO)<sub>2</sub> and Eu<sub>2</sub>L<sub>3</sub>(<i>R</i>-BINAPO)<sub>2</sub> were verified to be enantiopure by <sup>1</sup>H, <sup>19</sup>F, <sup>31</sup>P NMR and DOSY NMR analyses. Additionally, the mirror-image CD spectra also demonstrated the successful syntheses of the enantiomers and the presence of an effective chirality transformation from BINAPO to achiral L. Furthermore, the perfect mirror-image circularly polarized luminescence (CPL) spectra of Eu<sub>2</sub>L<sub>3</sub>(<i>S</i>-BINAPO)<sub>2</sub> and Eu<sub>2</sub>L<sub>3</sub>(<i>R</i>-BINAPO)<sub>2</sub> indicated the existence of the excited state chirality of the Eu<sup>3+</sup> center associated with |<i>g</i> <sub>lum</sub>| values reaching 0.112. In addition, the photophysical properties of three helicates were also discussed.","dates":{"release":"2021-01-01T00:00:00Z","publication":"2021 Mar","modification":"2025-04-04T19:57:48.385Z","creation":"2025-04-04T19:57:48.385Z"},"accession":"S-EPMC8695889","cross_references":{"pubmed":["35423583"],"doi":["10.1039/d1ra01583d"]}}