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Circularly Polarized Luminescence Appeared from Complete Inorganic Materials Encapsulating Guest Lanthanide Oxides in Host Chiral Silica

Recently, circularly polarized luminescence (CPL)‐active systems have become a very hot and interesting subject in chirality‐ and optics‐related areas. The CPL‐active systems are usually available by two approaches: combining covalently a luminescent centre to chiral motif or associating the guest of luminescent probe to a chiral host. However, all the chiral components in CPL materials were organics although the parts of luminescent were alternative as organics or inorganics. Herein, we proposed the first totally inorganic CPL‐active system by "luminescent guest ‐ chiral host" strategy. Typically, luminescent sub‐10 nm lanthanide oxides (Eu2O3 or Tb2O3) nanoparticles ("guest") were encapsulated on chiral non‐helical SiO2 nanofibres ("host") via the calcination (at 900 oC) of chiral SiO2 hybrids nanofibres of trapping Eu3+ (or Tb3+). These lanthanide oxides showed circular dichroism (CD) optical activity in the ultraviolet wavelength and CPL signals around at 615 nm for Eu3+ or 545 nm for Tb3+. This work would be very instructive to design inorganics‐based CPL‐active systems by incorporation of various luminescent guests in chiral inorganic hosts.

Authors:   Ren-Hua Jin
Journal:   Chemistry - A European Journal
Year:   2018
Pages:   n/a
DOI:   10.1002/chem.201705862
Publication date:   17-Jan-2018
Facts, background information, dossiers
  • wavelength
  • silica
  • optical activity
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