| abstract |
The present invention relates to use of compounds of formula (I) or a coordination complex thereof with a metal ion selected from the group consisting of Ni(ll), Cu(ll), Sc(lll), Fe(ll), Fe(lll), Ca(ll), Co(ll), Co(lll), Os(lll), Os(IV), Al(lll), Mn(IV), Mn(lll), Mn(ll), Cr(lll), Ti(ll), Ti(IV), Zr(IV), Hf(IV), W(IV), W(V), Ta(IV), Ta(V), Pd(ll), Pt(ll), Pt(IV), Ir(lll), Rh(lll), Ru(ll), Ru(lll), Re(IV), ln(ll), In(lll), Ga(lll), Sn(ll), Sn(IV), V(IV), V(V), Nb(V), Au(lll), Mg(ll), Cd(ll), Ce(lll), Ce(IV), Eu(lll), Yb(lll), Gd(lll), and Zn(ll) as a dispersing agent for improvement of dispersion of a carbonaceous material in a dispersion medium It also relates to compositions comprising a compound of formula (I), a coordination complex thereof or a mixture thereof and a carbonaceous material, and to methods of making them. |