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Completing the Series: New Coordination Networks of Composition 3 ∞ [ RE 2 (ADC) 3 (H 2 O) 6 ]·2H 2 O with RE = Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Y and ADC 2– = Acetylenedicarboxylate ( – O 2 C–C≡C–CO 2 – )
Author(s) -
Gramm Verena K.,
Schuy Andrea,
Suta Markus,
Wickleder Claudia,
Sternemann Christian,
Ruschewitz Uwe
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.201700361
Subject(s) - isostructural , orthorhombic crystal system , crystallography , crystal structure , coordination number , photoluminescence , type (biology) , chemistry , materials science , ion , ecology , optoelectronics , organic chemistry , biology
The crystal structures of 3 ∞ [ RE 2 (ADC) 3 (H 2 O) 6 ] · 2H 2 O ( RE = Pr, Nd, Sm, Eu, Tb, Dy) were solved and refined from X‐ray single crystal data. They crystallize in a structure type already known for RE = La, Ce and Gd ( P 1 , no. 2, Z = 2), which is characterized by RE O 9 polyhedra forming dimeric units being the nodes of a 3D framework structure linked by ADC 2– anions ( – O 2 C–C≡C–CO 2 – = acetylenedicarboxylate). From synchrotron powder diffraction data it was shown that isostructural coordination networks are formed for RE = Ho, Er, Y, whereas for RE = Tm, Yb, Lu a new structure type crystallizing in a highly complex crystal structure with a large orthorhombic unit cell is found. All compounds are obtained by slow evaporation of an aqueous solution containing RE (OAc) 3 · x H 2 O and acetylenedicarboxylic acid (H 2 ADC). The coordination networks of composition 3 ∞ [ RE 2 (ADC) 3 (H 2 O) 6 ] · 2H 2 O were thoroughly investigated by thermal analysis and for RE = Eu, Tb, a strong red and green photoluminescence was observed and investigated by means of UV/Vis spectroscopy.