TY - JOUR
T1 - Coordination polymers derived from a flexible bis(pyridylurea) ligand
T2 - Conformational change of the ligand and structural diversity of the complexes
AU - Hao, Yongjing
AU - Wu, Biao
AU - Li, Shaoguang
AU - Jia, Chuandong
AU - Huang, Xiaojuan
AU - Yang, Xiao Juan
PY - 2011/1/7
Y1 - 2011/1/7
N2 - The assembly of a bis(pyridylurea) ligand, N,N′-ethane-1,2-diylbis(3- pyridin-4-ylurea) (L), with Zn(AcO)2, CdCl2, CdSO 4 or CuSO4 led to four coordination polymers, {[Zn(AcO)2L]·H2O·CH3OH} n (1), {[CdCl2L2]·2DMF}n (2), {[CdSO4L(H2O)3]·3H2O} n (3), and {[CuSO4L(H2O)2] ·2H2O}n (4). Compound 1 is an infinite 1D zigzag chain with alternate Zn(AcO)2 units and L molecules. The cadmium(ii) dichloro complex 2 features a corrugated sheet structure with a (4,4) net topology, while the sulfato complex 3 shows a unique 1O/2U interwoven 3D structure assembled from zigzag chains. The copper(ii) complex 4 is an exceptional diamondoid network with an unusual 12-fold [6 + 6] interpenetration mode. Interestingly, the ligand shows the expected flexibility in the formation of the coordination polymers. In 1, 3 and 4, the central ethylene spacer adopts the anti conformations and is roughly linear, whereas in 2 it assumes a gauche form and exists as a V-shaped linker. The structural variation of these coordination polymers as well as the conformational change of the ligand in the presence of different counter anions and metal ions is discussed.
AB - The assembly of a bis(pyridylurea) ligand, N,N′-ethane-1,2-diylbis(3- pyridin-4-ylurea) (L), with Zn(AcO)2, CdCl2, CdSO 4 or CuSO4 led to four coordination polymers, {[Zn(AcO)2L]·H2O·CH3OH} n (1), {[CdCl2L2]·2DMF}n (2), {[CdSO4L(H2O)3]·3H2O} n (3), and {[CuSO4L(H2O)2] ·2H2O}n (4). Compound 1 is an infinite 1D zigzag chain with alternate Zn(AcO)2 units and L molecules. The cadmium(ii) dichloro complex 2 features a corrugated sheet structure with a (4,4) net topology, while the sulfato complex 3 shows a unique 1O/2U interwoven 3D structure assembled from zigzag chains. The copper(ii) complex 4 is an exceptional diamondoid network with an unusual 12-fold [6 + 6] interpenetration mode. Interestingly, the ligand shows the expected flexibility in the formation of the coordination polymers. In 1, 3 and 4, the central ethylene spacer adopts the anti conformations and is roughly linear, whereas in 2 it assumes a gauche form and exists as a V-shaped linker. The structural variation of these coordination polymers as well as the conformational change of the ligand in the presence of different counter anions and metal ions is discussed.
UR - http://www.scopus.com/inward/record.url?scp=78649831928&partnerID=8YFLogxK
U2 - 10.1039/c0ce00200c
DO - 10.1039/c0ce00200c
M3 - Article
AN - SCOPUS:78649831928
SN - 1466-8033
VL - 13
SP - 215
EP - 222
JO - CrystEngComm
JF - CrystEngComm
IS - 1
ER -