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Optical properties of new indotricarbocyanine dye as a limiter of laser radiation power

“…For PD 7098, B = 0.37%. As shown before [30], the main mechanism of photosensitization of oxygen by tricarbocyanine dyes is radiationless energy transfer from the dye in the triplet state. Therefore, B may characterize the yield of intercombinational conversion of dye molecules.…”

“…Polymethine dyes (PD) are broadly used in various branches of science and technology, e.g., in the photographic industry as photosensitizers [1], in biology and medicine as fluorescent markers and materials for photochemotherapy [2][3][4], in solar cells [5][6][7] and quantum electronics as passive gates, active media for tunable lasers, and nonlinear materials [8-10], etc. Recently the nonlinear optical properties of PD [11][12][13][14][15] have become especially interesting due to the search for new nonlinear materials for application as limiters of laser radiation power (nonlinear limiters) in the visible spectral region [13,16,17].…”

“…The degree of polarization of the fluorescence (P) of the dye was measured at 15 o C using the Fluorolog spectrofluorimeter. The quantum yield of generation (B) of singlet oxygen ( 1 O 2 ) was found by comparing the emission efficiency of 1 O 2 in deuterochloroform upon photosensitization by the investigated dye and HITCI as a standard (B = 3.6% [25]). Luminescence of singlet oxygen in the 1-2 µm spectral range was recorded on the laboratory apparatus described in the literature [26].…”

Synthesis and Characterization of Tetradentate N2O2Schiff Base Ligand and its Rare Earth Metal Complexes

“…11,12 Coordination compounds of the lanthanides are frequently used as catalysts, which is demonstrated by the work of Shibaski et al, Kobayashi and Voropai and others. [13][14][15] One of the oxygen heterocyclic compounds, 3-acetyl-6-methyl-2H-pyran 2,4(3H)-dione (DHA) was reported to be an excellent chelating agent and possesses promising fungicidal, bactericidal, herbicidal and insecticidal activities. [16][17][18][19] It is also a versatile starting material for the synthesis of a wide variety of heterocyclic ring systems.…”

Fast photoprocesses in a symmetric indotricarbocyanine dye (HITC) in solutions

“…The dye HITCI was used as a standard. The quantity B e = 3.6% for it in deuterated CHCl 3 [17]. The lifetime of singlet oxygen and the radiation lifetime of 1 O 2 for the used solvents were taken from the literature [18,19].…”