A novel red emitting material based on polyoxometalate@periodic mesoporous organosilica

• Decatungstoeuropate (EuPOM) was incorporated within the channels of a bifunctional periodic mesoporous organosilica (BPMO).
• The EuPOM@BPMO composite exhibits strong red emission under UV irradiation.
• Photoluminescent studies reveal an efficient energy transfer process to the lanthanide emitting center.
• A significant change in the Eu3+ coordination environment was observed after incorporation into the silica matrix.

The first lanthanopolyoxometalate-supported bifunctional periodic mesoporous organosilica (BPMO) composite is here reported. The incorporation of decatunsgstoeuropate anions ([Eu(W5O18)2]9−) within the porous channels of an ethylene-bridged TMAPS-functionalized BPMO produced a luminescent material exhibiting a strong red emission under UV irradiation. Photoluminescence studies showed an efficient energy transfer process to the lanthanide emitting center in the material (antenna effect). A significant change in the coordination environment of Eu3+ ions was observed after its incorporation into the TMAPS-functionalized material. The possible reason for this is discussed within the paper.

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