Department of Chemistry and Interdepartmental Nanostructured Interfaces and Surfaces (NIS) Centre, University of Torino, via P. Giuria 7, Torino 10125, Italy; MOBI Research Group, Department of Electric Engineering and Energy Technology (ETEC), Vrije Universiteit Brussel, Pleinlaan 2, Brussels 1050, Belgium.
Department of Chemistry and Interdepartmental Nanostructured Interfaces and Surfaces (NIS) Centre, University of Torino, via P. Giuria 7, Torino 10125, Italy.
Colloids Surf B Biointerfaces. 2022 Sep;217:112620. doi: 10.1016/j.colsurfb.2022.112620. Epub 2022 Jun 9.
Three luminescent Eu-containing phosphate materials (Ca-doped europium phosphate monohydrate, Eu-doped carbonated-apatite, and europium phosphate monohydrate) were prepared and analyzed on the level of bulk structure and surface properties and compared to the biomimetic non-luminescent counterpart hydroxyapatite. Europium-containing phosphate materials exhibited nanosized dimensions but different luminescence emissions and luminescence lifetimes depending on their crystalline structures (i.e., lanthanide phosphate or apatites) and chemical composition. The introduction of Eu in the crystal lattice leads to a notable decrease in the overall Lewis acidity of the surface cationic sites detected by CO probing. Further, the mixed Eu/Ca-containing materials surfaces were found to be very similar to the reference hydroxyapatite in terms of water adsorption energy, while the pure europium phosphate resulted to have the notably higher energy values of direct interaction of water molecules with the surface cations with no detected propagation of this effect towards water overlayers.
三种含 Eu 的发光磷酸盐材料（一水磷酸钙中掺 Eu、掺 Eu 的碳酸磷灰石、一水磷酸 Eu）在体相结构和表面性质方面进行了制备和分析，并与仿生非发光的羟基磷灰石进行了比较。Eu 掺杂的磷酸盐材料表现出纳米尺寸，但发光发射和发光寿命因晶体结构（即镧系磷酸盐或磷灰石）和化学成分而异。Eu 在晶格中的引入导致通过 CO 探测检测到的表面阳离子位置的整体路易斯酸度显著降低。此外，发现混合的 Eu/Ca 掺杂材料表面在水吸附能方面与参考羟基磷灰石非常相似，而纯的 Eu 磷酸盐则表现出与表面阳离子直接相互作用的水分子的能量值明显更高，且没有检测到这种效应向水覆盖层的传播。
