Photophysical and photochemical properties of novel metallophthalocyanines bearing 7-oxy-3-(m-methoxyphenyl)coumarin groups

Synthesis and Photophysical Properties of Phthalocyanines with 4-(1-Methyl-1-phenylethyl)phenoxy Groups

“…4-(1-methyl-1-phenylethyl)phenoxy groups at the periphery has a noticeable effect on their spectroscopic-luminescent and photochemical properties. Thus, the dependence of the quantum yield of fluorescence and the generation of singlet oxygen on the nature of metals was found; in the series Mg > Al-Cl > Zn, the Φ F values decrease, [20][21][22] while the Φ Δ values increase on the contrary. [28] An analysis of the results showed the presence of a pronounced effect of the heavy atom on the photophysical properties of the studied phthalocyanines.…”

“…Moreover, the position of the emission band maximum and the quantum yield of fluorescence and generation of singlet oxygen depend on many factors, such as the nature of phthalocyanine (the nature and position of substituents, the nature of the metal complexing agent), and the nature of the solvent. [20][21][22][23][24][25][26][27] As an example, Figures 2 and 3 show the UV-Vis and fluorescence spectra of the Mg(II), Zn(II), and Al(III) metal complexes of tetra-4-[4-(1methyl-1-phenylethyl)phenoxy]tetra-5-nitrophthalocyanine in chloroform. Table 2 presents the maxima of the emission of the main fluorescence band, Stokes shifts, quantum yields of fluorescence (Φ F ) and generation of singlet oxygen (Φ Δ ).…”

Synthesis, characterization, and determination of photophysicochemical properties of peripheral and nonperipheral tetra‐7‐oxy‐3,4‐dimethylcoumarin substituted zinc, indium phthalocyanines

“…Singlet oxygen quantum yield (Φ Δ ) is the expression of the singlet oxygen generation efficiency of compounds. During the singlet oxygen production processes, a photosensitizer such as phthalocyanine compounds absorbs light in the red region of visible light and turns the ground state oxygen into the excited state oxygen via transferring its energy to Data from Taştemel et al [55] b k F is the transition rate constant for fluorescence and calculated using k F = Φ F /τ F . Data from Taştemel et al [55] the ground state oxygen.…”

Coumarin–Tetrapyrrolic Macrocycle Conjugates: Synthesis and Applications

“…Typically the first step involves the formation of a coumarin-substituted phthalonitrile, usually by nucleophilic displacement of a nitro group in 3- or 4-nitrophthalonitrile, and the resulting phthalonitriles 56 are then converted into metallophthalocyanines 57 by cyclotetramerization in 2-(dimethylamino)ethanol in the presence of a metal salt. The coumarins and phthalonitriles used in many of these reactions, and the metals in the phthalocyanine complexes, are shown in Table 1 [ 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 ].…”