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Divalent Metal 2,5-Thiophenedicarboxylate Coordination Polymers with the Conformationally Flexible Bis(4-pyridylformyl)homopiperazine Ligand.
- Source :
- Zeitschrift für Anorganische und Allgemeine Chemie; Sep2016, Vol. 642 Issue 18, p966-972, 7p
- Publication Year :
- 2016
-
Abstract
- Divalent metal coordination polymers containing the rigid 2,5-thiophenedicarboxylate (tdc) ligand and the conformationally flexible dipyridylamide ligand bis(4-pyridylformyl)homopiperazine (bpfh) show different layer topologies and chirality. As determined by single-crystal X-ray diffraction, {[Cd(tdc)(bpfh)(H<subscript>2</subscript>O)] ·3H<subscript>2</subscript>O} <subscript>n</subscript> ( 1) shows a twofold parallel interpenetrated centrosymmetric (4,4) layered grid structure. {[Zn(tdc)(bpfh)] ·H<subscript>2</subscript>O} <subscript>n</subscript> ( 2) exhibits a similar system of twofold interpenetrated (4,4) grid-like layers, but in contrast to 1, it crystallizes in an acentric space group. {[Ni<subscript>2</subscript>(tdc)<subscript>2</subscript>(bpfh)<subscript>2</subscript>(H<subscript>2</subscript>O)] ·2H<subscript>2</subscript>O} <subscript>n</subscript> ( 3) possesses {Ni<subscript>2</subscript>(μ-H<subscript>2</subscript>O)(OCO)<subscript>2</subscript>} dimeric units connected into a doubled layer motif by the full span of the tdc and bpfh ligands. Weak antiferromagnetic coupling is observed within the dimeric units in 3 [ g = 2.172(6) and J = -0.79(1) cm<superscript>-1</superscript>]. Compounds 1 and 2 undergo blue-violet fluorescence upon ultraviolet irradiation; the cadmium derivative 1 shows potential as a sensor for the solution-phase detection of nitrobenzene although coordination polymer exfoliation likely occurs. Thermal decomposition behavior of the three new phases is also discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00442313
- Volume :
- 642
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Zeitschrift für Anorganische und Allgemeine Chemie
- Publication Type :
- Academic Journal
- Accession number :
- 118173044
- Full Text :
- https://doi.org/10.1002/zaac.201600197