The optical properties of noble metal nanoparticles feature the pres- ence of a pronounced resonance band in the visible light spectrum, called the surface plasmon resonance band. The influence of local surface plasmons on the dynamics of singlet–triplet energy transfer in the donor–acceptor pair is the subject of recent active studies by analysts in connection with the prospective using of nanoparticles in optosensorics and the opportunity of significant improvements of the metrological characteristics of analytical techniques.