Synthesis and characterization of new photostabilizers from 2,4-dihydroxybenzophenone

Tricyclic flavonoids with 1,3-dithiolium substructure

“…2-Hydroxyphenacyl dithiocarbamates 4 are known compounds and were prepared following the reported experimental procedures [16–19]. Aminals 5 were synthesized according to the literature procedures [20–21]. …”

5-Methyl-4-(5-Bromo-2-hydroxyphenyl)-1,3-Dithiolium Derivatives

“…The synthesis of the 1,3-dithiolium ring can be accomplished following two consecutive reactions as described in scheme 1. In a first step, phenacyl dithiocarbamates 2a-c were obtained by reacting 2-bromo-1-(5-bromo-2-hydroxyphenyl)propan-1one (1) [63,64] with N,N-dimethylammonium N,Ndimethyldithiocarbamate, sodium N,N-diethyldithiocarbamate and piperidinium piperidine-1-carbodithioate, respectively. These compounds have been obtained as colorless crystals in good isolated yields.…”

“…Recent reports highlighted the TTFs ability to act as donor groups in intramolecular charge-transfer complexes [7,8]. In this context, a variety of acceptor units have been investigated, nitrogen and sulfur containing cations receiving a great deal of attention [9][10][11][12][13][14][15][16][17][18][19]. Of special interest for conducting materials are charge-transfer [20][21][22][23][24][25][26][27][28][29][30] and push-pull [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] compounds.…”

Photostabilization of polystyrene/montmorillonite nanocomposite. A factorial experimental design 24

“…In some applications, it is not desired that polymers degrade very quickly. The photodegradation and photostabilization mechanisms of most polymers are well‐known,12–25 however, there are only few studies on polymeric composites 25–30. Most of these publications about polymer nanocomposite photostabilization used thin films as samples.…”