Effect of concentration, temperature, and freezing rate on the phosphorescence parameters of acenaphthene in n-hexane matrices

Phosphorescence in cooled organic materials—temporal kinetics and spectral memory effect

“…Our results are in qualitative agreement with the above properties of organic compounds cryogenic phosphorescence described in the authors' works [3][4][5][6][12][13][14][15][16][17][18]. Experimental results show the promise of studying the possibility of creating cryogenic lasers based on organic compounds [7,8].…”

“…Many works are devoted to the study of the spectral properties of organic and inorganic substances at cryogenic temperatures [12][13][14][15][16][17][18]. Literature analysis allows us to draw the following conclusions: the effect of long-term phosphorescence is usually associated with a nonradiative transition in the triplet radiation scheme.…”

“…The samples were cooled to cryogenic temperatures and their phosphorescence spectra were excited for 10 s by ultraviolet radiation from a mercury lamp. An analysis of the data obtained in [7][8][9][10] and literature [12][13][14][15][16][17][18] allows us to conclude that the phosphorescence spectra of various substances cooled up to cryogenic temperatures can degrade over time. In addition the spectrum itself can 'shift' depending on the matrix in which is 'placed' phosphorescent molecule or atom.…”

“…The long-term phosphorescence effect is usually associated with a nonradiative transition in the triplet radiation scheme [10][11][12][13][14][15][16][17]. At the same time, the authors of this article consider other possible models for describing this phenomenon.…”

Extra long phosphorescence in organic materials at cryogenic temperatures investigation

“…The phenomenon of extra-long phosphorescence is usually associated with the triple emission scheme of the nonradiative transition [1,3,[17][18][19][20][21]. We also consider other possible approaches to describe this phenomenon.…”