It was shown that the emission intensity of (Tp^PyTb)₂pma and (Tp^PyEu)2pma (Tp^Py– = tris(3-(2′-pyridyl)- pyrazolyl)borate, pma^4– = tetraanion of pyromellitic acid) solutions decreases with the increasing concentration of N-nitrosamines with the luminescence quenching efficiency up to 92%. This quenching is due to the primary inner filter effect, i.e. the partial absorption of the exciting light by N-nitrosamines. It was suggested that the dependence of emission quenching efficiency of the complexes on the concentration of N-nitrosamines can potentially be used for estimation of their amount in solution by fluorescence spectroscopy.

结果表明，(Tp ^Py Tb) ₂ pma 和 (Tp ^Py Eu)2pma (Tp ^Py– = tris(3-(2'-pyridyl) -pyrazolyl )borate, pma ^4– = 均苯四酸的^四阴离子的发射强度) 溶液随着 N-亚硝胺浓度的增加而降低，发光淬灭效率高达 92%。这种猝灭是由于初级内部过滤效应，即 N-亚硝胺对激发光的部分吸收。有人建议，配合物的发射猝灭效率对 N-亚硝胺浓度的依赖性可潜在地用于通过荧光光谱法估计它们在溶液中的量。