Phosphazenes as scaffolds for the construction of multi-site coordination ligands

Solid-state synthesis of embedded single-crystal metal oxide and phosphate nanoparticles and in situ crystallization

“…To our knowledge, these precursors are the first dinuclear heterobimetallic derivatives of cyclotriphosphazenes containing both silicon and a transition metal attached to the phosphazene ring. [26] Pyrolysis at 800 °C in air result in nanostructured materials: using precursors (1a) and (2a) we produce both Ti and Si-containing single-crystal nanoparticles (TiO 2 and SiO 2 ) respectively, with the first report of Si and W-oxide and phosphate singlecrystal nanoparticles from precursors (1b) and (2b). High resolution electron microscopyand various spectroscopic analyses were used to identifythe elusive W and Si pyrophosphates (WP 2 O 7 and SiP 2 O 7 ) as either perfect single-crystal or heavily twinned nanoparticles form using a solid-state method of direct deposition on a surface.…”

Organometallic Derivatives of Cyclotriphosphazene as Precursors of Nanostructured Metallic Materials: A New Solid State Method

“…Although a considerable number of cyclotriphosphazenes are known [27][28][29][30][31][32][33][34][35][36] those of Ti [36] are relatively scarce.…”

New organotin(IV) complexes with a potentially multi-site ligand based on the cyclotriphosphazene platform: Synthesis and spectral studies

“…E-mail: tsedaghat@scu.ac.ir ligands based on cyclophosphazene platforms is an extremely interesting area [4][5][6][7][8][9]. An interest in these ligands comes from their ability to readily extend the small molecule chemistry to appropriate high polymers such as corresponding polyphosphazenes [2,[10][11][12][13].…”

“…These metal-rich phosphazene polymers have potentially desirable properties as, for example, catalysis, conductors or drug delivery systems [6,[14][15][16]. To date, many different types of cyclophosphazene-based ligands have been designed and metal ions ranging from first row transition metals to lanthanides have been involved to prepare coordination and organometallic compounds [4]. However, no attempts have been made to synthesize organotin complexes with these ligands.…”