TY - JOUR

T1 - Characterization of two zincophosphates (UH-6 and UH-10) synthesized using the cobalt(III) sarcophagine complex as structure-directing agent

AU - Klingelhöfer, Stefan

AU - Wiebcke, Michael

AU - Behrens, Peter

PY - 2006/12/11

Y1 - 2006/12/11

N2 - The novel zincophosphates UH-6 (sum formula |[Co(diAMHsar)]| [Zn 2(HPO4)3(PO4)] · H 2O) and UH-10 (sum formula |([Co(diAMHsar)])2| [{Zn 2(HPO4)3(PO4)}2] · H2O) were synthesized in hydrothermal syntheses employing the chiral sarcophagine complex [Co(diAMHsar)]5+ as the structure-directing agent. The inorganic part of UH-6 consists of pearl-like chains of alternating [ZnO4] and [PO4] tetrahedra, which are connected to the incorporated cobalt complex via numerous hydrogen bonds. UH-10 was synthesized under similar conditions, but at higher reaction temperatures. In consequence, the crystal structures of UH-6 and UH-10 are closely related, although systematic disorder in UH-10 and the lower symmetry result in a unit cell twice as large as the corresponding unit cell of UH-6. Interestingly, in both zincophosphates only one enantiomer of the cobalt complex is present, despite the fact that a racemic mixture of the complex salt is used for synthesis. Thermogravimetric analysis and powder X-ray diffraction of a thermally treated sample of UH-6 reveals a phase transformation at ca. 300 °C.

AB - The novel zincophosphates UH-6 (sum formula |[Co(diAMHsar)]| [Zn 2(HPO4)3(PO4)] · H 2O) and UH-10 (sum formula |([Co(diAMHsar)])2| [{Zn 2(HPO4)3(PO4)}2] · H2O) were synthesized in hydrothermal syntheses employing the chiral sarcophagine complex [Co(diAMHsar)]5+ as the structure-directing agent. The inorganic part of UH-6 consists of pearl-like chains of alternating [ZnO4] and [PO4] tetrahedra, which are connected to the incorporated cobalt complex via numerous hydrogen bonds. UH-10 was synthesized under similar conditions, but at higher reaction temperatures. In consequence, the crystal structures of UH-6 and UH-10 are closely related, although systematic disorder in UH-10 and the lower symmetry result in a unit cell twice as large as the corresponding unit cell of UH-6. Interestingly, in both zincophosphates only one enantiomer of the cobalt complex is present, despite the fact that a racemic mixture of the complex salt is used for synthesis. Thermogravimetric analysis and powder X-ray diffraction of a thermally treated sample of UH-6 reveals a phase transformation at ca. 300 °C.

KW - Cobalt

KW - Sarcophagine complex

KW - Structure-directed synthesis

KW - Zincophosphates

UR - http://www.scopus.com/inward/record.url?scp=33845970932&partnerID=8YFLogxK

U2 - 10.1002/zaac.200600267

DO - 10.1002/zaac.200600267

M3 - Article

AN - SCOPUS:33845970932

VL - 633

SP - 113

EP - 119

JO - Zeitschrift fur Anorganische und Allgemeine Chemie

JF - Zeitschrift fur Anorganische und Allgemeine Chemie

SN - 0044-2313

IS - 1

ER -