A general trend in the emission properties emerge from the comparison of different metal centered 2D perovskite. Narrow and intense PL associate with lead-based samples, this emission broads when moving to tin-based compound and finally it became very broad and weak for germanium-based samples. In these cases we expect a high exciton-phonon scattering induced by the presence of long alkyl-ammonium chain. In addition, the exciton-phonon Fröhlich interaction of the 2D Sn-based perovskites was found to be one order of magnitude larger in tin perovskites in comparison to lead perovskites which can be at the origin of the increase in the FWHM of PL and to the more likely formation of self-trapped exciton states. It is evident here that for germanium specimen this interaction would be even higher determining the conditions for a weak and broad room temperature emission which only recovers a high intensity at 77 K.