Jalilah Abd Jalil
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Preferred name
Jalilah Abd Jalil
Official Name
Abd Jalil, Jalilah
Alternative Name
Jalilah, A. J.
Jalil, J. A
Jalilah, Abd Jalil
Jalil, Jalilah Abd
Abd Jalil, Jalilah
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56946938300
Researcher ID
EJZ-9130-2022

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Chirogenesis and Pfeiffer effect in optically inactive Euˡˡˡ and Tbˡˡˡ Tris(β-diketonate) upon intermolecular chirality transfer from Poly- and Monosaccharide Alkyl Esters and α-Pinene: emerging Circularly Polarized Luminescence (CPL) and Circular Dichroism (CD)

2020 , Michiya Fujiki , Laibing Wang , Nanami Ogata , Fumio Asanoma , Asuka Okubo , Shun Okazaki , Hiroki Kamite , Jalilah Abd Jalil

We report emerging circularly polarized luminescence (CPL) at 4f-4f transitions when lanthanide (Euˡˡˡ and Tbˡˡˡ) tris(β-diketonate) embedded to cellulose triacetate (CTA), cellulose acetate butyrate (CABu), D-/L-glucose pentamethyl esters (D-/L-Glu), and D-/L-arabinose tetramethyl esters (D-/L-Ara) are in film states. Herein, 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate (fod) and 2,2,6,6-tetramethyl-3,5-heptanedione (dpm) were chosen as the β-diketonates. The glum value of Eu(fod)3 in CABu are +0.0671 at 593 nm (5 (Formula presented.) F1) and −0.0059 at 613 nm (5 (Formula presented.) F2), respectively, while those in CTA are +0.0463 and −0.0040 at these transitions, respectively. The glum value of Tb(fod)3 in CABu are −0.0029 at 490 nm (5 (Formula presented.) F6), +0.0078 at 540 nm (5 (Formula presented.) F5), and −0.0018 at 552 nm (5 (Formula presented.) F5), respectively, while those in CTA are −0.0053, +0.0037, and −0.0059 at these transitions, respectively. D-/L-Glu and D-/L-Ara induced weaker glum values at 4f-4f transitions of Eu(fod)3, Tb(fod)3, and Tb(dpm)3. For comparison, Tb(dpm)3 in α-pinene showed clear CPL characteristics, though Eu(dpm)3 did not. A surplus charge neutralization hypothesis was applied to the origin of attractive intermolecular interactions between the ligands and saccharides. This idea was supported from the concomitant opposite tendency in upfield 19F-NMR and downfield 1H-NMR chemical shifts of Eu(fod)3 and the opposite Mulliken charges between F-C bonds (fod) and H-C bonds (CTA and D-/L-Glu). An analysis of CPL excitation (CPLE) and CPL spectra suggests that (+)- and (–)-sign CPL signals of Euˡˡˡ and Tbˡˡˡ at different 4f-4f transitions in the visible region are the same with the (+)-and (–)-sign exhibited by CPLE bands at high energy levels of Euˡˡˡ and Tbˡˡˡ in the near-UV region.

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