Thresholds for nonlinear recording of fluorescent centers in chromone-doped polymer films

Mechanochemical Defluorinative Acylation of ortho‐Hydroxyarylenaminones by CF3‐Compounds: Synthesis of 3‐Acylchromones

“…lipid peroxidation involved in a number of pathophysiological events in the central nervous system, such as cerebral ischemia, trauma and Alzheimer's disease [15] . In materials chemistry, these compounds have recently found applications as thermally activated delayed fluorescence emitters (TADF) [16,17] or photosensitive compounds exhibiting two‐photon induced photoisomerization – such compounds embedded into polymer films could be used for 3D‐data storage [18,19] …”

“…[15] In materials chemistry, these compounds have recently found applications as thermally activated delayed fluorescence emitters (TADF) [16,17] or photosensitive compounds exhibiting two-photon induced photoisomerization -such compounds embedded into polymer films could be used for 3D-data storage. [18,19] From a synthetic point of view, 3-acylchromones are valuable precursors serving as electrophiles in 1,3nucleophilic addition, usually followed by pyrone ringopening, with subsequent cyclisation reactions yielding various (hetero)cyclic scaffolds, e. g. 2-hydroxybenzophenones, 6H-benzo[c]chromenes and benzo[c]coumarins. [20][21][22][23][24][25] Since 3-acylchromones are present in nature only scarcely (as metabolites of some plants [26] and fungi [27,28] ), it is thus necessary to develop facile and efficient synthetic protocols towards these compounds, enabling further study of their pharmacological properties as well as easy access to the valuable synthetic intermediates.…”

Исследование Переходного Состояния И Динамики Фотохимических Трансформаций Молекул Хромонов

“…Для практических применений [1] особый интерес представляет использование нелинейного режима записи. В работах [4,5] были приведены результаты измерения порогов нелинейной записи люминесцентных меток в соединениях хромонов, а также исследованы некоторые люминесцентные свойства этих соединений. Более детальное исследование механизмов и динамики фототрансформации молекул позволит выбрать оптимальные параметры записывающего источника лазерного излучения, а также сформулировать требования для модификации самих светочувствительных соединений и их свойств.…”