Action des molecules organiques sur les composes d'insertion de metaux alcalins dans le graphite

Synthesis of Ternary and Quaternary Graphite Intercalation Compounds Containing Alkali Metal Cations and Diamines

“…The synthesis of a stage 1 K−TMEDA−GIC (d i = 0.894 nm) by the ternarization of the KC 24 with TMEDA is known. 19 Assuming the parallel arrangement of TMEDA, the reported Δd = 0.559 nm is close to that observed (0.563 nm) for intercalation compounds of VOCl and TMEDA. 31 We found that the direct reaction of graphite, K metal, and TMEDA yields a blue product with I c = 0.855 nm (PXRD not shown), and this phase is assigned as K−TMEDA−GIC following Merle et al 19 Neither Li nor Na metal dissolve in TMEDA, and neither metal produces GICs using this method.…”

“…However, the orientation of EN within the intercalate galleries was not described. Later, Merle et al prepared K–TMEDA–GIC (TMEDA = N , N , N′ , N′ -tetramethylethylenediamine) by the ternarization of KC 24 with TMEDA. More recently, we reported the preparation of M–12DAP–GICs (M = Li, Na, K; 12DAP = 1,2-diaminopropane) .…”

“…In addition to these diamine intercalates, there are several known GICs containing monoamines, including ammonia, − methylamine, and triethylamine . We added several to this list by reporting a homologous series of ternary GICs containing Na + solvated by n -alkylamines with x carbon atoms, Na– n C x –GIC ( x = 3, 4, 6, 8, 12, and 14) .…”

The Intercalation of N,N,N′,N′-Tetramethyl-ethane-1,2-diamine (tmeda) into C6Li and C12Li

“…The first three (00 ) X-ray reflections of the ternary compound are numbered and correspond to an identity period of 11.5 Å, larger than that of the potassium−tmeda−graphite ternary, 8.94 Å, prepared by infiltrating C 36 K with tmeda. 14 We note at this point that the (00 ) reflections vanished after prolonged vacuum treatment, and a series of reflections corresponding to an identity period of 9.1 Å became more noticeable (Figure S1, Supporting Information). The dimensions of the gallery height after subtraction of the thickness of the graphite sheet, 3.35 Å, from the 11.5 Å and 9 Å identity periods are commensurate with the length and width of a tmeda molecule when considered as a short cylinder (Figure S2).…”

“…As the (001) reflection of the pristine C 6 Li vanished after this treatment, complete conversion of the binary C 6 Li into the ternary compound was achieved. The first three (00 scriptl ) X-ray reflections of the ternary compound are numbered and correspond to an identity period of 11.5 Å, larger than that of the potassium–tmeda–graphite ternary, 8.94 Å, prepared by infiltrating C 36 K with tmeda …”