Spectroscopic study of the inclusion compound of β-cyclodextrin and Tris(dibenzoylmethane)europium(III) dihydrate

Luminescence properties of Eu3+ β-diketonates incorporated in cubic mesoporous silica

“…29 Si solid-state CP/MAS NMR spectra were measured on a Bruker AV 400 MHz spectrometer. Powder X-ray diffraction patterns were recorded on a D/max-IIIA Rigaku diffractometer with Cu anode.…”

“…For this experiment, special care was taken to keep constant the illuminated surface of sample and the power of the incident UV light. 29 Si solid-state CP/MAS NMR spectra of MCM-48 and MCM-48-R were recorded in order to check the successful grafting of MTES and AAPTMS groups. Representative spectra are presented in Fig.…”

“…Site selective spectra were also recorded at low temperature (15 K) by exciting selectively the 5 D 0 or the 5 D 2 levels of Eu (III), but at the exception of Eu(DBM) 3 Á H 2 O, these spectra did not provide any additional information on the Stark structure of the 7 F J components due to inhomogeneous broadening. Judd-Ofelt's experimental intensity parameters O 2,4 were calculated from the room temperature emission spectra following a procedure reported in several papers [29][30][31][32][33]. The values are given in Table 3.…”

Synthesis and fluorescent properties of lanthanide complex covalently bonded to porous silica monoliths

“…The A 0j rates (see Eq. (1)) are calculated from the integrated intensity ratios between the 5 D 0 → 7 F j and 5 D 0 → 7 F 1 emission transitions and the value of magnetic-dipole transition rate A 01 is estimated to be 50 s −1 [26].…”

Luminescent properties of encapsulation of europium complex into meso-structured silica monoliths

“…To better understand the effect of chelation on spectroscopic prosperities of Eu 3+ , Judd-Ofelt's experimental intensity parameters O 2 and O 4 were calculated from emission spectra at room temperature by using the following equation [15][16][17][18].…”