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Synthesis and Crystal Structures of Coordination Complexes Containing Cu 2 I 2 Units and Their Application in Luminescence and Catalysis
Author(s) -
Zhao Huaixia,
Li Xinxiong,
Wang Jinyun,
Li Liuyi,
Wang Ruihu
Publication year - 2013
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201300249
Subject(s) - pyridine , chemistry , ring (chemistry) , luminescence , crystallography , catalysis , copper , chelation , crystal structure , alkyne , cycloaddition , stereochemistry , ligand (biochemistry) , photochemistry , medicinal chemistry , inorganic chemistry , materials science , organic chemistry , biochemistry , receptor , optoelectronics
The reaction of bis‐ or tris‐chelating nitrogen‐containing ligands (L1–L5) with CuI gave rise to five coordination complexes consisting of Cu 2 I 2 dimeric units. L1 in complex 1 adopts a cis conformation and links Cu 2 I 2 into a dinuclear structure. L2 and L3 in complexes 2 and 3 exhibit a trans conformation, and the alternative linkage of L2 or L3 and Cu 2 I 2 results in the formation of a 1D chain. In complex 4 , two pyrazolyl‐pyridine units of L4 at the same side of the central phenyl ring are connected to Cu 2 I 2 forming a tetranuclear macrocycle, and the third pyrazolyl‐pyridine unit at the other side of the central phenyl ring further links the macrocycle into a 1D chain. L5 bridges Cu 2 I 2 in a cis conformation forming a tetranuclear complex, which is very different from 1 owing to the difference of the electronic property between pyrazolyl and triazolyl rings. The coordination nitrogen atoms in two pairs of ortho ‐positioned nitrogen‐containing chelating rings in L1 and L5 are directed toward opposite and the same directions, respectively. Complexes 1 – 4 containing pyrazolyl‐pyridine units showed luminescence whereas no clear emission was observed in complex 5 containing triazolyl‐pyridine units, despite the fact that they were investigated under the same conditions. The application of complexes 1 – 5 in the copper(I)‐catalyzed Ullmann cross‐coupling reaction and azide–alkyne cycloaddition reaction was preliminarily evaluated.