Comparative studies of photophysical and photochemical properties of solketal substituted platinum(II) and zinc(II) phthalocyanine sets

Engineering of relevant photodynamic processes through structural modifications of metallotetrapyrrolic photosensitizers

“…Besides coordination with several metal ions, possible structural modification involves tailoring of hydrophilicity or hydrophobicity, shift of the maximum absorption to the near infrared, introduction of various functional groups and conjugation with nanoparticles or imaging agents [106][107][108][109][110][111][112][113][114]. Sterically-distorted phthalocyanines bearing n-butoxy groups in all the -benzo positions of the macrocycle ring, MPc(OBu) 8 combine absorption bands displaced to lower energies with photostability and the ability to generate high yields of singlet oxygen [122].…”

4,5-, 3,6-, and 3,4,5,6-tert-Butylsulfanylphthalonitriles: synthesis and comparative structural and spectroscopic analyses

“…The nature of the metal (possibly axially substituted) is one of them [4]. Another important and widely used possibility is to tune the nature, number, and position of the substituents, an easily properties-modulating parameter: the nature, number, and position of substituents can strongly influence the aggregation and modulate a phthalocyanine's optical, photophysical, and photochemical properties [4][5][6][7][8][9][10][11][12][13]. Substitution by bulky substituents is indeed a general strategy to limit one of the main phthalocyanines' problems.…”

Octa-3,6-hexoxyphthalocyanines: Effect of Protonation on Spectral and Photochemical Properties

“…Отсутствие новых полос поглощения в видимой области спектра при снижении интенсивности полос Q и Соре (Рисунок 7) свидетельствует о деструкции хромофора, которая в присутствии кислорода, как известно, [18] ). [19] Такое поведение можно объяснить сильным электронодонор-ным влиянием заместителей в положениях 3 и 6, которое снижает устойчивость фталоцианинов к фотоокис-лению. [18] Таблица 4.…”