title: Triboluminescence and crystal structure of the complex [Eu(NО3)3(HMPA)3]: role of cleavage planes.
abstract: The atomic structure of crystals of the [Eu(NО3)3(HMPA)3] [hexamethylphosphotriamide (HMPA)] complex characterized by an intensive luminescence and triboluminescence was determined using X-ray structural analysis. Noncentrosymmetric crystals have a monoclinic syngony: a = 16.0686 (3), b = 11.0853 (2), c = 20.9655 Å (4), β = 93.232° (1), space group P21, Z = 4, ρcalc= 1.560 g/cm3.The crystal structure is represented by individual С18Н54EuN12O12P3complexes linked through van der Waals interactions with clearly expressed cleavage planes. The Eu(III) atom coordination polyhedron reflected the state of a distorted square antiprism. Structural aspects of the suggested model, including formation of triboluminescence properties, were considered and the role of the cleavage planes was discussed.
authors: Institute of Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, 159, Prosp. 100-letiya Vladivostoka, Vladivostok, 690022, Russian Federation.
authors: B V
authors: BV
authors: Bukvetskii
authors: Institute of Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, 159, Prosp. 100-letiya Vladivostoka, Vladivostok, 690022, Russian Federation.
authors: A G
authors: AG
authors: Mirochnik
authors: Institute of Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, 159, Prosp. 100-letiya Vladivostoka, Vladivostok, 690022, Russian Federation.
authors: P A
authors: PA
authors: Zhikhareva
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008958:Models, Molecular
chemical_list: D056831:Coordination Complexes; D049408:Luminescent Agents
keywords: crystal structure; europium (III); triboluminescence