Citation: LI Jing, WANG Yu-Hong, SONG Rui-Feng. A Novel Two-dimensional Lead(Ⅱ) Coordination Polymer Based on Dinuclear Lead(Ⅱ) Unit Containing (5-Chloro-quinolin-8-yloxy) Acetate[J]. Chinese Journal of Structural Chemistry, ;2014, 33(10): 1488-1494. shu

A Novel Two-dimensional Lead(Ⅱ) Coordination Polymer Based on Dinuclear Lead(Ⅱ) Unit Containing (5-Chloro-quinolin-8-yloxy) Acetate

1.
a School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;
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b Key Laboratory of Organic Synthesis of Jiangsu Province, Soochow University, Suzhou 215123, China

Corresponding author: WANG Yu-Hong, SONG Rui-Feng,
Received Date: 9 March 2014
Available Online: 26 June 2014
Fund Project: Supported by Key Laboratory of Organic Synthesis of Jiangsu Province (KJS1308) (KJS1308)

A novel two-dimensional lead(Ⅱ) coordination polymer 1,[C₁₁H₇Cl₂NO₃Pb]_n, has been prepared by solvothermal reaction of new bridging ligand (5-chloro-quinolin-8-yloxy)acetic acid (HL) with PbCl₂, and its structure was characterized by IR, elemental analysis, TG-DTA and single-crystal X-ray diffraction analysis. The crystal is of monoclinic system, space group P2₁/c with a=16.7603(7), b=8.6907(4), c=8.4745(3) Å, β=101.1110(11)°, [C₁₁H₇Cl₂NO₃Pb, M_r=479.27, V=1211.25(9) Å³, Z=4, D_c=2.628 g/cm³, F(000)=880, μ=14.367 mm^-1, R=0.0173 and wR=0.0508. The asymmetric unit contains one lead(Ⅱ) cation, one (5-chloro-quinolin-8-yloxy)acetate (L) ligand and a chloride ion. The Pb^Ⅱ center is hepta-coordinated in a distorted pentagonal bipyramidal geometry. The coordination sphere of the Pb atom is completed by two oxygen atoms and one nitrogen atom of the same L ligand, two bridging chloride ions and two bridging oxygen atoms of two adjacent L ligands. Two Pb^Ⅱ centers are linked by the two L ligands to form a C₂-symmetric dimer unit with a planar[Pb₂O₂] ring. Each dimer unit acts as a secondary building unit (SBU) and links adjacent four dimer units by the chloride atoms and oxygen atoms of carboxylate groups of L, forming a two-dimensional array. Such two-dimensional layers are packed through intermolecular C-H…Cl hydrogen bonds into a three-dimensional supramolecular structure. When the dimer unit is viewed as a 4-connected node, 1 is simplified as a 4-nodal 2-D network with square lattices of the diagonal lengths to be 6.079(1) Å. The fluorescence emission peak of complex 1 appears near 407nm.
- lead(Ⅱ) complex,
- crystal structure,
- (5-chloro-quinolin-8-yloxy) acetic acid,
- coordination polymer
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