| abstract |
In the present invention, there is provided a light-emitting lanthanide complex comprising the following formula and an ink containing the complex, a method for producing the complex, and articles comprising the same: In this formula, M is selected from the alkali cations Li + , Na + , K + , Rb + and Cs + and mixtures thereof and is present to neutralize charge of the complex, Ln is selected from the trivalent rare earth cations of Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb, R is a C 5 to C 6 heteroaryl, Y is an optionally substituted C 3 -C 8 heterocycloalkyl moiety connected to R by an N atom, n is an integer of 3 or 5, x is an integer of 0 or 1. |