Asian Journal of Chemistry; Vol. 25, No. 10 (2013), 5499-5500
http://dx.doi.org/10.14233/ajchem.2013.14678A
NOTE
Hydrothermal Synthesis of 1D Zn(II) Coordination Polymer
BIN LI
Institute of Chemical Engineering and Environment, Wei Fang University of Science and Technology, Shandong 262700, P.R. China
Corresponding author: E-mail: whyull@yeah.net
(Received: 15 October 2012;
Accepted: 15 April 2013)
AJC-13242
One new Zn(II) compound [Zn(L)(1,10-phen)]n [H2L = 4,4-(isopropylidene)-bis(benzoic acid) and 1,10-phen = 1,10-phenanthroline] has
been successfully synthesized. This compound shows a one-dimensional chain. The carboxylate groups in present compound adopt a bis-
chelating coordination mode.
Key Words: Coordination polymer, Crystal structure.
The current interest in polymeric coordination networks
is rapidly expanding not only for their potential applications
in catalysis, molecular adsorption, magnetism, non-linear
optics and molecular sensing, but also for their intriguing
variety of topologies1-4. Although the rapid progress in metal-
organic frameworks has been made, it is also a great challenge
to rationally prepare and control the structures and composition
of target products in crystal engineering because of the difficult
prediction of either the composition or the structure of the
reaction product.
All reagent and solvents employed were commercially
available and used as received without further purification.
Preparation of compound: A mixture of 4,4-
(isopropylidene)-bis(benzoic acid) (1 mmol), Zn(OAc)2·2H2O
(1 mmol ), 1,10-phenanthroline (1 mmol) and distilled water
(15 mL) was heated in a 25 mL stainless steel reactor with a
Teflon liner 160 ºC for 96 h, followed by slow cooling to room
temperature. Yellow crystals of the compound formed.
X-crystallography: Suitable single crystals were selected
under a polarizing microscope and fixed with epoxy cement
on fine glass fibers which were mounted on a Bruker Smart
1000 CCD diffractometer with a MoKα radiation (λ = 0.71073
Å) at 293(2) K. The hydrogen atoms bound to carbon were
located by geometrically calculations. All non-hydrogen
atoms were refined by full-matrix least-squares techniques.
All calculations were performed by the SHELXTL 97 pro-
gram5. The crystallographic data and experimental details of
structural analyses for coordination polymers are summarized
in Table-1.
Structure description: In compound 1, Zn (II) atom is
coordinated to four oxygen atoms from two L ligands and
two nitrogen atoms from 1,10-phenanthroline ligand. In
compound the carboxylate groups adopt a bis-chelating
coordinated modes which lead to form a 1D chain structure
(Fig. 1).
TABLE-1
CRYSTALLOGRAPHIC DATA AND STRUCTURE REFINEMENT SUMMARY FOR COMPLEX
Empirical formula
Formula weight
Crystal system space group
C29H22N2O4 Zn
527.88
Z, Calculated density (mg/m3)
Absorption coefficient (mm-1)
F(000)
8,1.584
1.869
2017
-17≤ h ≤ 17
-10 ≤ k ≤ 14
-37 ≤ l ≤ 37
Orthorhombic, Pbca
a = 13.828(5)Å
b = 10.833(5) Å
c = 28.728(5)Å
β = 90º
4303(3)
1.42-27.53
R1 = 0.0470, wR2 = 0.1387
Unit cell dimensions
Limiting indices
Volume (Å3)
θ Range for data collection
Final R indices [I >2 σ(I)]
Largest diff. peak and hole (e/Å3)
Goodness-of-fit on F2
0.341 and -0.727
0.897
R1 = 0.0804, wR2 = 0.1660
R indices (all data)
Li, Bin
