Synthesis and photochromic properties of disulfide-1,3-diazabicyclo[3.1.0]hex-3-ene functionalized silver nanoparticles

Ghavidast, Atefeh; Mahmoodi, Nosrat O.; Zanjanchi, Mohammad Ali

doi:10.1016/j.molliq.2014.06.012

Cited by 30 publications

(16 citation statements)

References 40 publications

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“…In continuation to our prior works [40][41][42][43][44][45] , we have synthesized modified magnetic Fe 3 O 4 @SiO 2 -TRIS NPs by the steps shown in Figure 1. First, Fe 3 O 4 NPs were prepared by the co-precipitation of Fe 2+ and Fe 3+ ions in a basic solution.…”

Section: Resultsmentioning

confidence: 93%

Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles

Galangash

Ghavidast

Bozorgpanah

2018

J Chinese Chemical Soc

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The adsorption of the dyes Acid Red 114 and Reactive Black 5 in aqueous solutions on polyhydroxyl dendrimer magnetic nanoparticles (Fe3O4@SiO2‐TRIS) was studied in a batch system. The Fe3O4@SiO2‐TRIS NPs were characterized by Fourier transform infrared spectroscopy, X‐ray diffraction, and transmission electron microscopy. Experiments were performed under different conditions such as the initial dye concentration, adsorbent dose, and pH. The pseudo‐second‐order model provided a very good fit for the two anionic dyes. The Langmuir and Freundlich adsorption models were used to describe the equilibrium isotherms at different temperatures, and the former agreed very well with the experimental data. However, the adsorption capacity of Fe3O4@SiO2‐TRIS NPs was reduced during surface modification, which could be due to the dye occupying the binding sites of the dendrimer. Thermodynamic parameters, namely the change in free energy (ΔG0), enthalpy (ΔH0), and entropy (ΔS0), were also determined.

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Section: Resultsmentioning

confidence: 93%

Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles

Galangash

Ghavidast

Bozorgpanah

2018

J Chinese Chemical Soc

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“…80 and Sch. 81 were used for the preparation photochromic Ag nanoparticles [117,118]. It was established that there is chemical interaction between Ag nanoparticles and the terminal thiol groups of photochromic compounds [118].…”

Section: Scheme 78 Scheme 79mentioning

confidence: 99%

“…It was established that there is chemical interaction between Ag nanoparticles and the terminal thiol groups of photochromic compounds [118]. Compounds with disulfide bonds showed a pronounced bathochromic spectral shift of the absorption band of the open-ring isomer and also in the surface plasmon resonance absorption of the photochromic nanoparticles [117].…”

Section: Scheme 78 Scheme 79mentioning

confidence: 99%

Nanophotochromism

Barachevsky¹

2015

Organic Photonics and Photovoltaics

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Abstract:The review presents the state-of-the-art analysis of investigations in the field of a new line of research of photochromism -nanophotochromism. The design, properties, and possible applications of photochromic nanoparticles prepared by different methods with the use of photochromic substances (aggregates, host-guest, and polymer systems, solid nanoparticles) as well as core-shell photochromic nanostructures based on polymers, silica, quantum dots, doped upconversion nanocrystals, and Ag, Au, etc. nanoparticles have been reviewed. Keywords: photochromism; photochromic nanoparticles; core-shell photochromic nanoparticles design; photoswitching; aggregates; polymer systems, host-guest systems IntroductionPhotochromism is a very important phenomenon for different applications in photonics. The applications are based on reversible phototransformations of photochromic compounds between two states and changes of their properties that accompany these transformations At present, systems and materials containing photochromic nanopatricles have become highly significant. Among these are nanodimensional particles of photochromic substances, including aggregates, and coreshell systems. As a core, inorganic nanoparticles of gold, silver, metal oxides, quantum dots (QD), and also polymeric nanoparticles are used. The shell consists of photochromic molecules or their aggregates connected to a core surface either chemically or physically. Photochromic nanoparticles with photocontrolled fluorescence arouse a special interest because the fluorescence technique is becoming a leading strategy in biological diagnosis, imaging, and detection applications. This paper is a state-of-the-art review which presents results of studying photochromic nanoparticles including author's own data. The results of earlier research are also surveyed in some other reviews [1][2][3][4][5][6][7][8][9][10][11][12][13]. Photochromic nanoparticles:properties and applications Nanoparticles based on photochromic substances AggregatesThe most known photochromic nanoparticles are aggregates of photochromic organic compounds [14]. These compounds experience reversible photoinduced transformations between two states, Sch. 1A and Sch. 1B. Scheme 1The photoinduced colored merocyanine form B absorbing visible irradiation is formed from a colorless form A as a result of photodissociation of the -C-O-bond of the pyran heterocycle under UV radiation, and this is followed by spontaneous isomerization of the cis-form to the trans one. The colored form B can be converted back to the initial colorless form A upon absorption of visible light or spontaneously during the dark relaxation, which is accelerated by heating.The J-aggregates of nitro-substituted indoline spiropyrans Sch. 2 with long alkyl substituents are of special interest [15].The narrow absorption bands of J-aggregates of these photochromic compounds (Fig. 1) made it possible prepare a specimen of the multilayered optical disk providing freUnauthenticated Download

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“…In the light of the above‐mentioned facts, in continuation to our interest in the development of photochromic compounds, for the first time, we report in this article the synthesis of several novel tetraarylimidazoles 1 a ‐ 1 i (Scheme ), phenanthroimidazole 1 j (Scheme ) and bis‐tetraphenylimidazole 1 k (Scheme ), all containing a 2‐methoxyphenol substituent at position 2 of imidazole ring under microwave irradiation and investigate their photochromic properties as well the effects of substituent groups thereon.…”

Section: Introductionmentioning

confidence: 99%

“…[41] Several imidazole derivatives have been used as inhibitors, anti-inflammatory agents, herbicides and fungicides, plant growth regulators and therapeutic agents. [42] In the light of the above-mentioned facts, in continuation to our interest in the development of photochromic compounds, [43][44][45][46] for the first time, we report in this article the synthesis of several novel tetraarylimidazoles 1 a-1 i (Scheme 1),…”

Section: Introductionmentioning

confidence: 99%

Photochromic Properties of Novel One‐pot Multicomponent Synthesized Tetraarylimidazoles

et al. 2019

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Acetic acid mediated synthesis of novel tetraarylimidazoles derivatives has been reported via multicomponent reaction of benzil or phenanthrene‐9,10‐dione, NH4OAc, vanillin and aniline derivatives under microwave irradiation. Several novel tetraarylimidazole derivatives, phenanthroimidazole and bis‐tetraphenylimidazole bearing a 2‐methoxyphenol substituent at position 2 of imidazole ring were prepared. The advantages of this method are the one‐pot preparation of compounds, in short reaction times (4‐7 min) and good yields. All synthesized compounds with a 2‐methoxyphenol substituent at position 2 of imidazole ring exhibited good photochromic behavior. The photoisomerization can be performed from ground state to triplet excited state according to TD‐DFT calculation. The results showed that the presence of ortho‐methoxy substituent to hydroxyl substitution has the greatest effect on photochromic properties of target compounds. Furthermore, a pattern was successfully visualized upon UV light irradiation, which suggested that these compounds can be served as a security ink or an anti‐counterfeiting mark for photo printing.

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Synthesis and photochromic properties of disulfide-1,3-diazabicyclo[3.1.0]hex-3-ene functionalized silver nanoparticles

Cited by 30 publications

References 40 publications

Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles

Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles

Nanophotochromism

Photochromic Properties of Novel One‐pot Multicomponent Synthesized Tetraarylimidazoles

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