An indoaniline metal complex of formula 1 or formula 2 having a large absorption in the near-infrared range and a reduced absorption in the visible range, which indoaniline metal complex is used in a transparent recording medium:
[CHEMICAL FORMULA 1]
[CHEMICAL FORMULA 2]
where M is a metal atom, and X is a negative ion.
一种式 1 或式 2 的
吲哚苯胺金属络合物,在近红外范围内具有较大的吸收率,在可见光范围内的吸收率较低,该
吲哚苯胺金属络合物用于透明记录介质:
[
化学式 1]
[
化学式 2]
其中 M 是
金属原子,X 是负离子。