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A nonlinear optical phosphate Ba5P6O20 was rationally developed by a tailored synthetic approach based on the use of flexible [P3O10]5− units. The phosphate exhibits a very short absorption edge of λ=167 nm, which is among the shortest known in phase‐matchable phosphates. First‐principles electronic structure analysis elucidated the origin of the changes in the optical properties, and specifically...
Die Struktur ist wichtig: Struktur und Anordnung der [Be3B3O12F]10−‐Gruppe (links im Bild, Be blau, B oliv, F grün, O rot) verursachen ausgeprägte Obertöne und eine kurze UV‐Absorptionskante im gemischten Fluor‐Beryllium‐Borat NaSr3Be3B3O9F4 (rechts). Seine Kristalle neigen nicht zur Schichtbildung, was auf Anwendungen in der nichtlinearen Tief‐UV‐Optik hoffen lässt.
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