Table 1.

Emission maxima ($\lambda$ _max), luminescence quantum yields (Φ) and excited state lifetimes ($\tau$ ) of Cr, Mo and W in the solid state (KBr pellet) at 290 K.

Complex	$\lambda$ max(VIS) [nm]	Φ(VIS)[a]	$\tau$ (VIS)[b] [ns]	$\lambda$ max(NIR) [nm]	Φ(NIR)[a]	$\tau$ (step‐scan) [ns]
Cr	≈695	–	–	≈965	–	380±10
Mo	666	1.1 ⋅ 10−4	8.1±0.1 (91 %)	926	9 ⋅ 10−4	600±10
W	673	1.7 ⋅ 10−4	2.04±0.06 (99 %)	918	1.4 ⋅ 10−3	370±10

[a] The error bars for the photoluminescence quantum yields are estimated to ±25 % according to the literature. [b] For the main component (relative contribution in brackets). ^[38]