{"title":"Enhancement of Circularly Polarized Luminescence Brightness of Schiff-Base Diphenylboron and 9-Borafluoren-9-yl Complexes","authors":"Masahiro Ikeshita, Shinya Watanabe, Taichi Oka, Ayumu Kuroda, Seika Suzuki, Daiya Suzuki, Yoshitane Imai, Takashi Tsuno","doi":"10.1002/cptc.202400265","DOIUrl":null,"url":null,"abstract":"<p>A series of diphenylboron and 9-borafluoren-9-yl complexes with chiral Schiff-base ligands was synthesized and characterized by NMR spectroscopy. X-ray diffraction analysis revealed that their boron centers were adapted to tetrahedral coordination geometry. Although boron complexes with salicylideneimine backbones exhibited a weak circularly polarized luminescence (CPL), the CPL brightness (<i>B</i><sub>CPL</sub>) was enhanced more than 9-fold by the π-extension of the Schiff base ligands. Time-resolved emission decay analysis and theoretical calculations based on density functional theory (DFT) were conducted to further understand their luminescent properties.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"8 12","pages":""},"PeriodicalIF":3.0000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemPhotoChem","FirstCategoryId":"92","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cptc.202400265","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
A series of diphenylboron and 9-borafluoren-9-yl complexes with chiral Schiff-base ligands was synthesized and characterized by NMR spectroscopy. X-ray diffraction analysis revealed that their boron centers were adapted to tetrahedral coordination geometry. Although boron complexes with salicylideneimine backbones exhibited a weak circularly polarized luminescence (CPL), the CPL brightness (BCPL) was enhanced more than 9-fold by the π-extension of the Schiff base ligands. Time-resolved emission decay analysis and theoretical calculations based on density functional theory (DFT) were conducted to further understand their luminescent properties.
ChemPhotoChemChemistry-Physical and Theoretical Chemistry
CiteScore
5.80
自引率
5.40%
发文量
165
期刊介绍：
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