Synthesis and properties of spiroxazine polymer having photocrosslinkable chalcone moiety

Synthesis and Antimicrobial Evaluation of Some Tricyclic Substituted benzo[h]quinazolines, benzo[h]quinolines and naphthaleno[d]thiazoles

“…The mass spectrum of the same compound showed two isotopic molecular ion peaks at m/z 297 and 299 which is in agreement with its molecular formula. In addition, the mass spectra of the chalcone derivatives IIb-f exhibited the molecular ion peaks of the compounds confirming their structural formulae These chalcones are considered to be useful intermediates in several cyclization reactions to produce different types of heterocyclic compounds according to the used reactants and the reaction's conditions 40,41 . Thus, in the present investigation, the target quinazolines IIIa,b, VIa,b and Va,b were obtained by condensation of the prepared chalcones IIa,b with urea , thiourea and guanidine salt respectively in refluxing ethanol under alkaline medium conditions.…”

Preparation and photochromism of poly(methyl methacrylate) microspheres containing spirooxazine

“…Water used for total procedures was deionized. [1,4]oxazine 3 was prepared from 1,3,3-trimethyl-2-methyleneindoline 1 and 1-nitroso-2,7-dihydroxynaphthalene 2 according to the method described in Refs [9,10] …”

“…In recent years, photochromic and thermochromic spiropyrans and spirooxazines have been receiving considerable attention, due to their potential application in many new technologies, such as data recording and storage, optical switching, displays, and non-linear optics [3,4]. For examples, the synthesis of cationic spiroxazine and alternate multilayer films of cationic spiroxazine and anionic polystyrenesulfonate (PSS) were prepared by layer-by-layer deposition using electrostatic attraction between oppositely charged ions.…”

A switching fluorescent photochromic carbazole–spironaphthoxazine copolymer

“…Photochromism studies of spirooxazine in polymer matrices [17], liquid crystal polymers containing spirooxazine as mesophases [18], spirooxazine grafted, poly[2-ethynyl-pyridinum bromide] ionic conjugated polymer [19], poly[N,N- [20] and other synthetic polymers [21,22] have recently been developed. However, photocontrollable fluorescent changes of spirooxazine are very scarce [23]; in particular, photoswitchable fluorescent photochromic spirooxazine polymers are virtually unknown.…”