Use of a coordination complex or compound for the measurement of temperature

Use for measuring temperatures of a coordination complex presenting formula I, wherein M1, M2, M3, M4, M5 are chosen, each independently of the others, in the group consisting of: CuI, AgI, AuI, PdII; n is equal to the sum of the oxidation states of M1, M2, M3, M4, M5 minus 3; II represents a respective portion of each tridentate ligand having the formula III in which R1 is chosen in the group consisting of: Ph, C1-C4 alkyl, halo-alkyl C1-C4 substituted phenyl; R2 is chosen in the group consisting of: Ph, C1-C4 alkyl, C1-C4 halo-alkyl-, substituted phenyl; R3 is chosen in the group consisting of: C3-C18 alkyl, benzyl, substituted benzyl, C1-C20 hydroxy-alkyl, C1-C20 alkoxy silane.