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Coordination polymers based on copper carboxylates and angular 2,5-bis(imidazol-1-yl)thiophene (thim(2)) ligand: sequential structural transformations

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Title Coordination polymers based on copper carboxylates and angular 2,5-bis(imidazol-1-yl)thiophene (thim(2)) ligand: sequential structural transformations
 
Creator SINGH, N
VISHNOI, P
ANANTHARAMAN, G
 
Subject METAL-ORGANIC FRAMEWORKS
SINGLE-CRYSTAL TRANSFORMATION
MAGNETIC-PROPERTIES
CATALYTIC-OXIDATION
SOLID-STATE
COMPLEXES
LUMINESCENCE
DIVERSITY
MOLECULES
NETWORK
 
Description Four CPs [Cu(thim(2))center dot(OOCCH3)(2)](n) (1), [Cu-2(thim(2))(mu(2)-OOCC6H5)(4)](n) (2), [Cu-2(thim2)(2)(mu 2-OOCC6H5) 2OOCC6H5)(2)](n) (3) and {[Cu-2(thim(2))(2)(mu(2)-OH2)(OOCC6H5)(4)]center dot 4H(2)O} (4) have been synthesized and characterized. 1D helical CP (1) was formed by using copper acetate and 2,5-bis(imidazol-1-yl) thiophene (thim(2)), whereas addition of two equivalents of benzoic acid resulted in the formation of a 1D zig-zag chain (2) consisting of paddle wheel copper benzoate units. Interestingly, CP 2 undergoes one pot sequential SC-SC transformations in an A-B-C manner to another kinetically more stable 1D ladder type chain (3) in the presence of air and excess ligand in solution before forming a thermodynamically stable 2D network (4) in mother solution. The cause for these transformations (2-4) and the magnetic behavior (1-3) of the CPs have been discussed.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2016-01-15T06:44:57Z
2016-01-15T06:44:57Z
2015
 
Type Article
 
Identifier CRYSTENGCOMM, 17(10)2153-2161
1466-8033
http://dx.doi.org/10.1039/c4ce02428a
http://dspace.library.iitb.ac.in/jspui/handle/100/17965
 
Language en