Premium
Two New Helical Compounds Based on Pitch‐Tunable Keggin Clusters
Author(s) -
Pang Haijun,
Zhang Chunjing,
Peng Jun,
Wang Yonghui,
Sha Jingquan,
Tian Aixiang,
Zhang Pengpeng,
Chen Yuan,
Zhu Min,
Su Zhongmin
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900559
Subject(s) - chemistry , isostructural , synthon , crystallography , cluster (spacecraft) , single crystal , keggin structure , polyoxometalate , copper , luminescence , electrochemistry , stereochemistry , crystal structure , catalysis , organic chemistry , electrode , optoelectronics , programming language , computer science , physics
Two isostructural compounds, {[Cu 2 (DF) 2 H 2 O] 2 SiW 12 O 40 } · 2H 2 O ( 1 ) and {[Cu 2 (DF) 2 H 2 O] 2 GeMo 12 O 40 } · 2H 2 O ( 2 ) (DF = 4,5‐diazafluoren‐9‐one), were synthesized and characterized by routine methods and single‐crystal X‐ray diffraction. In the compounds, each Keggin cluster links five copper dimers [Cu 2 (DF) 2 H 2 O] 2+ in an unusual asymmetrical pentacoordination mode to form 3D networks with left‐ and right‐handed helical chains. Notably, by comparing 1 and 2 with other helical compounds with Keggin clusters as connectors, we found that the pitches of those compounds are mainly dominated by the coordination modes of the Keggin clusters, suggesting that the Keggin clusters are pitch‐tunable synthons. Furthermore, the luminescent and electrochemical properties of the title compound were studied. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)