Intercalation of organic sensitisers into layered europium hydroxide and enhanced luminescence property

Abstract

Two organic sensitisers 4-biphenylcarboxylate (BPC) and terephthalate (TA) were intercalated into the gallery of layered europium hydroxide (LEuH). PL spectra tests indicated that BPC markedly enhanced the red luminescence of Eu(3+) due to efficient energy transfer between BPC and Eu(3+), forming a contrast to intercalated TA and the starting NO(3)(-) anions in the gallery. The energy level matching of the organic guests and Eu(3+) was also discussed to explain the energy transfer from sensitiser to Eu(3+).

Delaminated layered rare-earth hydroxide composites with ortho-coumaric acid: color-tunable luminescence and blue emission due to energy transfer

“…With regard to LRH/organic composites, most of the investigations focused on Eu-involving LRHs, for example our recent work for LEuH, LYH:Eu and LGdH:Eu, in which enhancement or quenching for Eu 3+ luminescence by the introduced organics was found. [29][30][31][32] Studies on layered terbium hydroxide (LTbH) composites with organic compounds are relatively rare, 33,34 and they mainly involve the luminescence of the layer Tb 3+ rather than interlayer organics.…”

Rare earth and zinc layered hydroxide salts intercalated with the 2-aminobenzoate anion as organic luminescent sensitizer

“…Most of the lanthanide cations (Ln 3+ ) display intense luminescence and are good activators in luminescent compounds. These excitations can be improved by using organic sensitizers to capture energy from external light sources followed by internal transfers to excite electrons in Ln 3+ [7][8][9].…”

Biohybrid based on layered terbium hydroxide and applications as drug carrier and biological fluorescence probe

“…The area per unit charge (S charge ) is usually used to explain the intercalation structure. [24,32] The average S charge of deprotonated ASA with a vertical orientation is 0. 21 3 2− may arise from HMT decomposition and the CO 2 in the air.…”

“…The 0.18 nm peak comes from the (620) and (440) reflections of the host layer. [31] On the basis of the layer thickness of LRHs (0.65 nm), [24] the gallery height is ca. The gallery height is larger than the height of monolayerd ASA, but smaller than the bilayered ASA.…”

“…[17] Layered rare-earth hydroxides (LRHs) with a general formula of [RE 2 (OH) 5 [20] as one kind of layered materials with positive layers, have been extensively studied due to their applications as catalysts, [21,22] adsorbents, [23] and optical materials. [24][25][26] Concerning intercalation of LRHs, most of the reports described their anion exchange behaviors and luminescence properties, while few reports focused on drug delivery and biologcial fluorescence probe except our recent work on the intercalation of naproxen into layered europium hydroxide (LEuH). [27] Aspirin (abbr.…”