Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Anthony Daleo | - |
dc.date.accessioned | 2019-08-01T16:30:27Z | - |
dc.date.available | 2019-08-01T16:30:27Z | - |
dc.date.issued | 2019 | - |
dc.identifier.issn | 2052-1537 | - |
dc.identifier.other | OAK-24249 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/250366 | - |
dc.description.abstract | The generation of organic dyes displaying intense red and near infrared fluorescence emission in solution and in the solid state is a topic of intense current interest. In this study, we present the synthesis and investigation of nine new derivatives of borondifluoride complexes of 2′-hydroxychalcones: four homo- and five hetero-substituted compounds X-X and X-Y (X, Y = F, Cl, Br, and I), where two halogen atoms are attached ortho and para (X and Y respectively in X-Y) to the 2′-hydroxyl group. UV-vis absorption fluorescence spectra in solution and in the solid state, DFT calculations, and analyses of single-crystal structures were performed. For all compounds, a fluorescence emission enhancement was clearly observed when passing from the solution (DCM) to the crystal (up to more than 10 fold). These molecules thus exhibit aggregation-induced enhanced emission (AIEE) with fluorescence maxima ranging from 654 nm (F-F) to 807 nm (I-I) in the solid state. The highest fluorescence quantum yield value within the series is reached for Cl-Cl (24% at 730 nm) whilst I-Br shows a rather good efficiency (2.5% at 806 nm) despite the presence of the two heavy iodine and bromine atoms. This study sheds light on the role of the halogen substitution on crystalline packing and solid-state emission properties of the chalcone-BF2 dyes. We outline that using halogen atoms provides a useful cocktail of steric, electrostatic and photophysical ingredients upon which to base the generation of near infrared emitting organic solids. © the Partner Organisations. | - |
dc.language | English | - |
dc.publisher | Royal Society of Chemistry | - |
dc.title | Influence of halogen substitution on aggregation-induced near infrared emission of borondifluoride complexes of 2′-hydroxychalcones | - |
dc.type | Article | - |
dc.relation.issue | 1 | - |
dc.relation.volume | 3 | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 86 | - |
dc.relation.lastpage | 92 | - |
dc.relation.journaltitle | Materials Chemistry Frontiers | - |
dc.identifier.doi | 10.1039/c8qm00478a | - |
dc.identifier.scopusid | 2-s2.0-85059214045 | - |
dc.author.google | D'Aléo A. | - |
dc.author.google | Saul A. | - |
dc.author.google | Attaccalite C. | - |
dc.author.google | Fages F. | - |
dc.date.modifydate | 20200211115235 | - |