Rhodamine dye derivatives and their use for phase change inks

摘要

Compounds of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="54" wi="102" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry> wherein M is either (1) a metal ion having a positive charge of +y
wherein y is an integer which is at least 2, said metal ion being capable of forming a compound with at least two chromogen moieties, or (2) a metal-containing moiety capable of forming a compound with at least two chromogen moieties, z is an integer representing the number of chromogen moieties associated with the metal and is at least 2, and R<Sub>1</Sub>,R<Sub>2</Sub>,R<Sub>3</Sub>,R<Sub>4</Sub>,R<Sub>5</Sub>,R<Sub>6</Sub>,R<Sub>7</Sub>,a,b,c,d,Y,Q<Sup>-</Sup>,A, and CA are as defined herein.