The first example of trinuclear copper(I) and silver(I) pyrazolates adducts with a tertiary diphosphine (Ph2PCH2PPh2) retaining trimeric [MPz](3) core is reported. Despite rather strong M-P bonding, the complexes are able to undergo the dissociation of one M-P bond leading to the "merry-go-round" movement of P atoms over the M-3 triangle. The copper complex displays emission from (MLCT)-M-1 and (MLCT)-M-3 states. The triplet and singlet states are separated by a relatively small energy gap (1080 cm(-1)) that triggers the thermally activated delayed fluorescence (TADF) behavior and leads to the worthy quantum yield of 41% at 298 K. The silver complex in the solid state and frozen solution shows dual emission originating from the (IL)-I-1 and (MLCT)-M-3 states that is dictated by the much higher energy difference between the emissive singlet and triplet as well as by the essentially different nature of these states.