Photochromism of azobenzene-thiol-1,3-diazabicyclo-[3.1.0]hex-3-ene on silver nanoparticles

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

doi:10.1016/j.dyepig.2015.03.014

Cited by 29 publications

(11 citation statements)

References 40 publications

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“…Previous researches showed that an organic compound with some functional groups such as hydroxyl OH, amino NH 2 , and mercapto SH could combine with AgNPs and changed its wavelength of UV absorption and intensity of Raman spectrum . For example, the AgNPs combining with mercapto SH of organic molecules were widely used to detect selectively glutathione, monitor the onset of surface screening effects of plasma resonance, promote the cysteine‐functionalized AgNP aggregates, and investigate the photochromism of azobenzenes .…”

Section: Introductionmentioning

confidence: 99%

Effect of substituents on the UV spectra of supermolecular system: Silver nanoparticles with bi‐aryl Schiff bases containing hydroxyl

Cao

Cheng

Zhang

et al. 2018

J of Physical Organic Chem

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Effect of substituents on the ultraviolet (UV) spectra of supermolecular system involving silver nanoparticles (AgNPs) and Schiff bases was investigated. AgNPs and 49 samples of model compounds (MC), bi-aryl Schiff bases containing hydroxyl (XBAY, involving 4-OHArCH¼NArY, 2-OHArCH¼NArY, XArCH¼NAr-4′-OH, and XArCH¼NAr-2′-OH), were synthesized. The size of AgNPs was characterized by transmission electron microscopy (TEM), and the UV absorption spectra of AgNPs, XBAYs, and MC-AgNPs mixed solutions were measured, respectively. The results show that (1) the size of AgNPs is larger in MC-AgNPs solutions than that in AgNPs solution due to the distribution of MC molecules on the surface of AgNPs; (2) the UV absorption wavelength of XBAYs changes in the action of AgNPs and their wavelength shift exists limitation between XBAY and MC-AgNPs solutions; and (3) the wavelength shift limit of MC-AgNPs (λ WSL ) is influenced by the substituents X and Y and the position of hydroxyl OH. The wavenumber Δν WSL of λ WSL can be quantified by employing the excited-state substituent constant σ ex CC and Hammett constant σ of substituents X and Y. Comparing with the 4-OH, the 4′-OH makes the Δν WSL a red shift, whereas the 2′-OH, comparing with the 2-OH, makes the Δν WSL a blue shift.

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Section: Introductionmentioning

confidence: 99%

Effect of substituents on the UV spectra of supermolecular system: Silver nanoparticles with bi‐aryl Schiff bases containing hydroxyl

Cao

Cheng

Zhang

et al. 2018

J of Physical Organic Chem

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“…In continuation to our previous works, here we describe the synthesis of the modified magnetic Fe 3 O 4 @SiO 2 ‐COOH NPs through the steps shown in Scheme . First, Fe 3 O 4 NPs were prepared by the coprecipitation of Fe +2 and Fe +3 ions in a basic solution, and then, in order to avoid possible aggregation or oxidation of the Fe 3 O 4 NPs surfaces, a layer of SiO 2 using the sol–gel process, through the hydrolysis of tetraethyl orthosilicate (TEOS), was coated on Fe 3 O 4 NPs surfaces successfully, Fe 3 O 4 @SiO 2 core–shell microspheres were prepared .…”

Section: Resultsmentioning

confidence: 94%

Synthesis of carboxyl‐functionalized magnetic nanoparticles for adsorption of malachite green from water: Kinetics and thermodynamics studies

Galangash

Montazeri

Ghavidast

et al. 2018

J Chinese Chemical Soc

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Magnetic carboxyl-coated silica iron oxide nanoparticles (Fe 3 O 4 @SiO 2 -COOH NPs) were successfully synthesized, characterized, and then applied as a nanoadsorbent for removal of malachite green (MG) from aqueous solutions. According to the experimental results, about 97.5% of MG could be removed from aqueous solutions using an adsorbent amount of 0.5 g/L at pH = 9 in 120 min. The kinetics and equilibrium adsorptions is well-described by the pseudo-secondorder kinetics and Langmuir model with the maximum absorption capacity of 263.16 mg/g, respectively. Thermodynamic studies showed that the adsorption of the hazardous MG dye was spontaneous and endothermic with a random process.

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“…This work was part of our interest in the study and synthesis of heterocyclic compounds . For simplification, the final triazepine products were categorized in four triazepine categories, namely TAP‐1,2,3, TAP‐1,2,4, TAP‐1,2,5, and TAP‐1,3,5.…”

Section: Discussionmentioning

confidence: 99%

Overview on Developed Synthesis Methods of Triazepane Heterocycles

Zeydi

2017

J Chinese Chemical Soc

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Triazepanes are important seven‐membered heterocyclic compounds with nitrogen at different positions in the ring, and have many pharmaceutical activities. Compounds with the triazepane core have attracted much attention as a result of their interesting biological properties. A study of the literature shows that there are various methods for the preparation of triazepanes. In this review, we have classified the methods based on the nitrogen position in the final triazepine products into four triazepine classes, namely TAP‐1,2,3, TAP‐1,2,4, TAP‐1,2,5, and TAP‐1,3,5.

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Photochromism of azobenzene-thiol-1,3-diazabicyclo-[3.1.0]hex-3-ene on silver nanoparticles

Cited by 29 publications

References 40 publications

Effect of substituents on the UV spectra of supermolecular system: Silver nanoparticles with bi‐aryl Schiff bases containing hydroxyl

Effect of substituents on the UV spectra of supermolecular system: Silver nanoparticles with bi‐aryl Schiff bases containing hydroxyl

Synthesis of carboxyl‐functionalized magnetic nanoparticles for adsorption of malachite green from water: Kinetics and thermodynamics studies

Overview on Developed Synthesis Methods of Triazepane Heterocycles

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