New fluorophosphate glasses co-doped with Eu3+ and Tb3+ as candidates for generating tunable visible light

Chirogenesis and Pfeiffer Effect in Optically Inactive EuIII and TbIII 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)

“…In this work, we applied a double-side, spin-coating technique (Guo et al, 2017 , 2018 ) to fabricate CPL-/CD-functioned films deposited onto fused quartz and/or borosilicate glass to obtain artifact-free CPL/photoluminescence (PL), CPLE/PL excitation (PLE), and CD/UV-visible spectra. CPL and CPL spectral characterizations of Eu III and Tb III at 4 f- 4 f transitions were assigned based on the literature (Fulgêncio et al, 2012 ; Tanner, 2013 ; Binnemans, 2015 ; de Queiroz et al, 2015 ; Xue et al, 2015 ; Yang et al, 2017 ). Dimensionless Kuhn's anisotropic ratios in the ES and GS, being popularly known as g lum and g abs , were manually evaluated at a specific extreme wavelength (λ ext ) of the corresponding CPL and CD spectral profiles in line with the literature (Eliel and Wilen, 1994 ).…”

“…In comparison to Tb(dpm) 3 , Eu(dpm) 3 in α-pinene has shown no detectable CPL signals ( Figure S14C , SM). From PL spectrum of Tb(dpm) 3 in ( R )-α-pinene excited at 320 nm associated with the corresponding CPL signals ranging of 500 and 800 nm ( Figure 4F ), seven characteristic 4 f -4 f transitions were assigned to 5 F 6 (490.0 nm, 20408 cm −1 ), 5 F 5 (545.5 nm, 18330 cm −1 ), 5 F 4 (584.5 nm, 17,109 cm −1 ), 5 F 3 (620.0 nm, 16129 cm −1 ), 5 F 2 (652.5 nm, 15,326 cm −1 ), 5 F 1 (682.0 nm, 14,663 cm −1 ), and 5 F 0 (702.5 nm, 14,235 cm −1 ) (Fulgêncio et al, 2012 ; de Queiroz et al, 2015 ; Xue et al, 2015 ; Yang et al, 2017 ).…”

“…The signs of the CPLE spectra depend on the signs at monitor wavelengths (535 and 548 nm) and α-pinene chirality; (+)-sign in CPLE spectrum is identical to (+)-sign CPL signal at 546 nm in ( R )-pinene, while (+)-sign in CPLE spectrum is the same of (+)-sign CPL signal at 535 nm in ( S )-pinene. The broad CPLE/PLE spectra may arise from at least three different origins of n -π * / 1 π- 3 π * transitions of three dpm ligands associated with high energy levels (e.g., 5 D 1 and 5 D 2 ) of Tb III (Fulgêncio et al, 2012 ; de Queiroz et al, 2015 ; Xue et al, 2015 ). A similar tendency can be seen in the broad CPLE/PLE spectra of Tb(fod) 3 in CABu , as marked in blue, pink, and green bars in Figures 3C,D .…”

Tunable and white light generation in lanthanide doped novel fluorophosphate glasses

“…The aim of the research group is to prepare fluorophosphate glasses with excellent transparency, and good thermal stability and chemical durability, and to correlate their structure and properties; mainly the optical properties by the aim of photoluminescence spectroscopy and excited state lifetime measurements and structural properties by EPR or NMR spectroscopy and thermal analysis (DSC). Promising results have been presented up to the publication date of this chapter [22,29,85], and further research are developing in this group. These studies are relatively new and very little was known on the structure of such type of glasses, medium-range order of these glasses and the probable sites of the rare-earth ions.…”

“…The studied glass compositions and their corresponding labels are given in Table 4, and pictures of the samples are given in Figure 5. [22,29,85]. 0.3% 0.5% 1.0% 1.5%…”