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Solvothermal Synthesis, Crystal Structure, and Luminescent Properties of Three Heterometallic Lanthanide‐Transition‐Metal Frameworks Constructed from Three Types of CuBr Motifs
Author(s) -
Chen Lu,
Liu Ying,
Lou Ding,
Wei Chengde,
Xu Yan
Publication year - 2017
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.201700168
Subject(s) - lanthanide , crystallography , isonicotinic acid , luminescence , ligand (biochemistry) , chemistry , transition metal , fluorescence , hydrothermal synthesis , metal organic framework , crystal structure , pyridine , metal , cluster (spacecraft) , octahedron , hydrothermal circulation , ion , materials science , catalysis , medicinal chemistry , organic chemistry , receptor , computer science , biochemistry , adsorption , quantum mechanics , programming language , hydrazide , physics , optoelectronics , seismology , geology
Three three‐dimensional (3D) heterometallic lanthanide‐transition‐metal (hetero‐ Ln ‐TM) compounds with the formula [ Ln 6 (Cu 4 Br 3 )(Cu 2 Br 2 ) 2 (Cu 2 Br)(IN) 20 (H 2 O) 12 ] · 2H 2 O [ Ln = Gd ( 1 ), Ln = Sm ( 2 ), Ln = Eu ( 3 )] based on the linkages of one‐dimensional Ln organic chain and Cu m Br n units were synthesized by mixing Ln 2 O 3 with isonicotinic acid (HIN = pyridine‐4‐carboxylic acid) under hydrothermal condition. During the synthesis, two ligands were used: the isonicotinate (IN – ) stabilizes the cluster and links the one‐dimensional Ln organic chains and Cu m Br n motif, whereas Br – anions play a very important role in the formation of the distinct Cu m Br n units. It is interesting that there are three different Cu‐Br motifs: a closed four‐membered ring [Cu 2 Br 2 ] subunit, a linear [Cu 2 Br] subunit, an S‐sharp [Cu 4 Br 3 ] subunit. Strong fluorescence of compounds 2 and 3 suggests an efficient energy transfer from the ligand to Eu 3+ ions. The luminescent investigation indicates that 2 and 3 are excellent candidates for fluorescent materials.