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Synthesis and Structures of Compounds with Molecular, One‐Dimensional, or Two‐Dimensional Selenidocadmate Anions
Author(s) -
Nußbruch Isabell,
Dehnen Stefanie
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800387
Subject(s) - isostructural , crystallography , ternary operation , molecule , chemistry , ion , fluorescence , diffraction , absorption spectroscopy , absorption (acoustics) , crystal structure , atom (system on chip) , stoichiometry , materials science , organic chemistry , physics , quantum mechanics , computer science , optics , composite material , programming language , embedded system
Three new ternary selenidocadmates, K 6 [CdSe 4 ] ( 1 ), K 2 [CdSe 2 ] ( 2 ), and K 2 [Cd 3 Se 4 ] ( 3 ), were synthesized and isolated upon fusion of K 2 Se and CdSe in respective stoichiometric amounts, followed by aminothermal treatment with 1,2‐diaminoethane. The anionic substructures range from molecules (0D, 1 ) through strands (1D, 2 ) to layered motifs (2D, 3 ). Compound 1 is isostructural to the corresponding mercury compound, K 6 [HgSe 4 ], whereas the structure of 3 was previously predicted according to powder diffraction data, and could now be confirmed. The 1D chains in the anion of 2 represent a novel anionic architecture for this class of compounds. Determination of optical absorption properties confirm the expected decrease of the onset‐of‐absorption energies with increasing dimensionality of the anionic structures along the series of compounds. The structures of 1 – 3 were determined by means of single‐crystal Xray diffraction, and the heavy‐atom composition of the compounds was confirmed by micro Xray fluorescence spectroscopy (μ‐XFS).