𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Preparation and characterization of Si modified Ge9 cluster

✍ Scribed by Tiezhen Ren; Pengyan Xiao; Xiang-Ying Xing; K. E. Christensen

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
233 KB
Volume
45
Category
Article
ISSN
0232-1300

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Open‐framework germanates show interesting pore structures due to their flexible building units. Germanates with different topology built from the Ge~9~ cluster can be prepared in several amine systems. This paper reports, the Si modified germanate ICMM6 (denoted as HUT‐2) prepared in ethylene diamine solution through a hydrothermal synthesis route. HUT‐2 is a silicogermanate with space group C222~1~ (a=12.1299(6) Å, b=13.9329(11) Å, c=14.2205(6) Å, V=2403.33(25) Å^3^) formed by the Si modified Ge~9~ cluster. A variation of unit cell parameters is observed that is in accordance with Si‐content. Powder X‐ray diffraction, ICP and TGA‐DSC analysis were recorded to determine the Si‐composition at the tetrahedral sites. Structure refinements against the X‐ray powder diffraction (XRPD) pattern determined the occupancy of Si at the two tetrahedral sites. An approximate Si/Ge ratio of 0.13‐0.18 is obtained based on these characterizations. TGA‐DSC analysis showed obvious weight loss of amine at 315 °C, which is higher than the reported pure germanate ICMM6. This further confirms the existence of Si within the structure of HUT‐2. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

📜 SIMILAR VOLUMES

Si modified Ge10 cluster: the preparatio
Si modified Ge10 cluster: the preparation and characterization of single crystal Na4(Ge,Si)9O20
✍ Peng-Yan Xiao; Tie-Zhen Ren; Zhi-Qiang Wang; K. E. Christensen 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 183 KB 👁 1 views

Ge 10 cluster, Na 4 (Ge,Si) 9 O 20 , hydrothermal. A Si modified Ge 10 cluster with structure Na 4 (Ge,Si) 9 O 20 (denoted as HUT-1) was synthesized by hydrothermal synthesis at 160 °C with a sodium silicate source. The compound was characterized by single crystal, powder X-ray diffraction and TGA-

ChemInform Abstract: Si Modified Ge10 Cl
ChemInform Abstract: Si Modified Ge10 Cluster: The Preparation and Characterization of Single Crystal Na4(Ge,Si)9O20.
✍ Peng-Yan Xiao; Tie-Zhen Ren; Zhi-Qiang Wang; K. E. Christensen 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 18 KB 👁 1 views

## Abstract The title compound with approximate composition Na~4~Ge~7.68~Si~1.32~O~20~ is hydrothermally prepared from a GeO~2~/xH~2~O/5en/2‐methyl pentanethylenediamine/yNaSiO~3~·9H~2~O (x = 35—46; y = 0.1—0.5) mixture (autoclave, 160 °C, 7 d) and characterized by powder and single crystal XRD.