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Linking Two Distinct Layered Networks of Nanosized {Ln 18 } and {Cu 24 } Wheels through Isonicotinate Ligands
Author(s) -
Cheng JianWen,
Zhang Jie,
Zheng ShouTian,
Yang GuoYu
Publication year - 2007
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200700600
Subject(s) - thermogravimetric analysis , crystallography , cluster (spacecraft) , hydrothermal circulation , copper , transition metal , materials science , luminescence , metal , chemistry , nanotechnology , catalysis , chemical engineering , metallurgy , optoelectronics , computer science , organic chemistry , engineering , programming language , biochemistry
A new series of heterolanthanide(III)‐copper(I) wheel‐cluster complexes [Ln 6 (μ 3 ‐O) 2 ](IN) 18 [Cu 8 (μ 4 ‐I) 2 (μ 2 ‐I) 3 ] ⋅ H 3 O (IN=isonicotinate; Ln=Y 1 , Nd 2 , Dy 3 , Gd 4 , Sm 5 , Eu 6 , Tb 7 ) were prepared by hydrothermal reaction at low pH. X‐ray crystallographic studies reveal that two unusual trinuclear [Ln 3 (μ 3 ‐O)] and tetranuclear [Cu 4 (μ 4 ‐I)] cores are successfully used as secondary building units to make two different nanosized wheels [Ln 18 (μ 3 ‐O) 6 (CO 2 ) 48 ] 6− , {Ln 18 }, and [Cu 24 (μ 4 ‐I) 6 (μ 2 ‐I) 12 ] 6+ , {Cu 24 }, with 12‐rings and a diameter of 26.7 and 26.4 Å, respectively. The wheels are further assembled into two‐dimensional (2D) {Ln 18 } and {Cu 24 } networks, the linkages between two distinct layered networks of {Ln 18 } and {Cu 24 } wheels by IN pillars along the c axis giving a series of unprecedented three‐dimensional (3D) sandwich frameworks. To our knowledge, compounds 1 – 7 are the first examples containing two different layered networks of nanosized Ln and transition metal (TM) wheels in wheel‐cluster chemistry. The IR, UV/Vis, thermogravimetric analysis (TGA), luminescent, and magnetic properties of these complexes were also studied.