2-Oxazoline based photo-responsive azo-polymers. Synthesis, characterization and isomerization kinetics

Spiridon, Mitica Cezar; Jerca, Florica Adriana; Jerca, Valentin Victor; Vasilescu, Dan Sorin; Vuluga, Dumitru Mircea

doi:10.1016/j.eurpolymj.2012.11.024

Cited by 29 publications

(27 citation statements)

References 51 publications

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“…The key to the interesting applications of azobenzene is the isomerization of the azo bond between the more thermally stable E configuration and the metastable Z form [49,50,51,52,53]. In an acid medium, the two Trans and Cis forms of the azobenzenes cause the formation of conjugated acids of different conformation (Figure 32).…”

Section: Isomerism Z/ementioning

confidence: 99%

“…The oxidizing coupling reaction of two amines used can be carried out by oxygen in the presence of a catalyst (CuCl/Pyridine) [76] under photocatalytic conditions promoted by TiO 2 [77], Fe 2 O 3 [78] HgO [79] or oxidizing agents such as KMnO 4 [80], MnO 2 [81], NaBO 3 [82], KO 2 [83], K 2 FeO 4 [84], AgO [85], Pb (OAc) 4 [86]. The reduction reagents used are zinc or SnCl 2 in a basic medium [87,88], LiAlH 4 [89], ethylenediamine [90], Na 2 Te [91] or lead either with triethylammonium formate or acetate of ammonium [51,52]. Another method was published in 1906 which is based on the reaction of p-nitrophenol in an alkaline medium at 200 C [94].…”

Section: Synthesis Of Azo Dyes By the Diazotization/coupling Reactionmentioning

confidence: 99%

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Classifications, properties, recent synthesis and applications of azo dyes

Benkhaya

M’rabet

Harfi

2020

Heliyon

595

187

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In this work, we have presented a very detailed review of the different classification of azo dyes as a function of the number of azo groups and the appropriate functional groups. Then we pointed out some chemical properties of these dyes such as reactivity, isomerization and tautomerism and listed. In the following, we have summarized some recent syntheses of azo dyes and the mechanism of azo dye/polymer conjugation. Finally, we indicate the principle of Gewald's reaction and its application to the synthesis of new azo dyes.

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Section: Isomerism Z/ementioning

confidence: 99%

Section: Synthesis Of Azo Dyes By the Diazotization/coupling Reactionmentioning

confidence: 99%

Classifications, properties, recent synthesis and applications of azo dyes

Benkhaya

M’rabet

Harfi

2020

Heliyon

595

187

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“…A complete insight into the NLO properties of a model azo-compound (D1-EtOxa [31]) that has the same structure with the azo-moieties after chemical attachment is further presented.…”

Section: First-order Hyperpolarizabilitymentioning

confidence: 99%

“…The SHG efficiency of poled azo-polymer thin films is investigated by the SHG Maker Fringes technique. A necessary comparison is carried out between the azobenzene containing M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 5 poly(methyl methacrylate)s and some poly(styrene)s [31] containing the same type of azomoieties, that we have recently synthesized by another approach. The overall impact of the polymer matrix type and various chromophore loads is debated.…”

Section: Introductionmentioning

confidence: 99%

Novel pendant azobenzene/polymer systems for second harmonic generation and optical data storage

et al. 2015

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“…The key to the interesting applications of azobenzenes is the facile and reversible isomerization of the azo bond, between the more thermally stable E configuration and the meta-stable Z form [11][12][13][14][15]. This photo-isomerization of azobenzenes with ultraviolet irradiation or laser has been used to influence conformational, optical or surface properties of polymeric materials that incorporate them [16,17].…”

Section: Introductionmentioning

confidence: 99%