| 摘要 |
An inkjet ink comprising an IR-absorbing dye. The dye is a metal-cyanine complex of formula (I): wherein Q1, Q2, Q3 and Q4 are the same or different and are independently selected from a C3-20 arylene group or a C3-20 heteroarylene group; M is selected from Ti(A1)(A2), Zr(A1)(A2), V(A1)(A2), Si(A1)(A2), Ge(A1)(A2), Ga(A1), Al(A1), Mn(A1), Fe(A1), Sn(A1)(A2), or Pb(A1)(A2); and A1 and A2 may be the same or different and are axial ligands of formula (IIIa) wherein: C1 represents a core unit having two or more branching positions; each P1 is independently selected from H, a hydrophilic moiety or a branched moiety; g1 is an integer from 2 to 8; q1 is 0 or an integer from 1 to 6; and each p1 is independently selected from 0 or an integer from 1 to 6.
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