Titanium phosphonate porous materials constructed from dendritic tetraphosphonates

Maxym V. Vasylyev, Ellen J. Wachtel, Ronit Popovitz-Biro, Ronny Neumann

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

An organic-inorganic hybrid material. TPPhA-Ti, was constructed by non-hydrolytic condensation of a dendritic tetrakis-1,3,5,7-(4- phosphonatophenyl)adamantane precursor and titanium(iv) isopropoxide. One preparative pathway yielded insoluble materials with a Ti/P ratio of ∼1 which was confirmed by a combination of FT-IR, TGA, and EDS measurements. N 2 sorption experiments showed that TPPhA-Ti is a porous solid (micro pores ∼13 Å; mesopores ∼38 Å) with a high surface area, ∼550 m2g-1. The structure and morphology of the TPPhA-Ti as investigated by transmission and scanning electron microscopy showed a layered-type material. Additional X-ray diffraction data suggest a paracrystalline material; an optimization of possible molecular arrangements of TPPhA-Ti was simulated that was in agreement with the experimental data. A second preparative pathway yielded a Ti oxide-phosphonate with a Ti/P ratio of ∼3.4. Both TEM and SEM revealed that hollow nanospheres were formed with diameters of ∼180- 300 nm.

Original languageEnglish
Pages (from-to)3507-3514
Number of pages8
JournalChemistry - A European Journal
Volume12
Issue number13
DOIs
Publication statusPublished - Apr 24 2006

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Keywords

  • Dendrimers
  • Layered materials
  • Nanospheres
  • Organic-inorganic hybrid composites porous materials
  • Titanium phosphonates

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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