Synthesis, structural and spectroscopic properties of two new ethylenediamine-templated gallophosphate-oxalate layered materials

Autor(en)

Mojmir Mrak, Uwe Kolitsch, Christian Lengauer, Venceslav Kaucic, Ekkehart Tillmanns

Abstrakt

Two new layered gallophosphate-oxalate materials have been prepared hydrothermally using ethylenediamine and oxalic acid as structure-directing agents. The compounds (C2N2H10)2 [Ga2(C2O4)2 (HPO4)3]žH2O 1 and (C2N2H10)3- [Ga4(C2O4)4 (HPO4)4(H2PO4)2] 2 are closely related, consisting of anionic double chains built of alternating pairs of GaO6 and HPO4 polyhedra. These double chains are linked via bridging HPO4 or H2PO4 tetrahedra to form corrugated layers containing eight-membered rings. The oxalate group acts as a bidentate ligand to each of the GaO6 octahedron. The corrugated layers are held together by strong to weak hydrogen-bonding interactions between oxalate groups, water and diprotonated ethylenediamine molecules, and the framework components. The compounds were characterized by single-crystal X-ray diffraction, thermogravimetric analysis, and infrared and Raman spectroscopy. Crystal data for 1: monoclinic, space group P21/c (No. 14), a = 6.355(1) A°, b = 39.362(8) A°, c = 9.249(2) A°, ß = 106.7(1)°, Z = 2. Crystal data for 2: triclinic, space group P1 (No. 2), a = 8.730(1) A°, b = 11.575(1) A°, c = 11.696(1) A°, a = 115.12(1)°, ß = 90.07(1)°, ? = 111.23(1)°, Z = 2.

Organisation(en)

Institut für Rechnungswesen, Innovation und Strategie, Institut für Mineralogie und Kristallographie

Externe Organisation(en)

National Institute of Chemistry

Journal

Inorganic Chemistry

Band

42

Seiten

598-604

Anzahl der Seiten

7

ISSN

0020-1669

Publikationsdatum

2003

Peer-reviewed

Ja

ÖFOS 2012

1051 Geologie, Mineralogie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/e41f3efe-1f3f-4cdd-aa63-9966caa2a2b9