排序方式: 共有35条查询结果,搜索用时 156 毫秒
1.
Samireh Esmaeili Samadizadeh Marjaneh Khaleghian Mehrnoosh Shiraz Nader Zabarjad 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2020,94(4):778-788
Russian Journal of Physical Chemistry A - In the current study, the adsorption properties of the molecule (4E,6E)-4-(4-hydroxyphenyldiazenyl)-N-((furan-2-yl)methylene)benzenamine (AZO) on... 相似文献
2.
Mohammad Fallahian Behzad Pourabbas Mehdi Sharif Kamran Froutani Mehrnoosh Mahmoodian Mahdi Mohammadizadeh 《Polymer Science Series B》2017,59(3):308-319
In this study polypyrrole (PPy) nanoparticles were deposited as a thin film on the modified surface of polyethyleneterephthalate (PET) by in situ chemical polymerization in the presence of sodium dodecylsulfate (SDS), sodium dodecylbenzenesulfonate (DBSNa) and mixture of them as the surfactant. The surface of PET was modified by KOH before deposition and was investigated for conductivity and adhesion of PPy nanoparticles to PET. Resulting conductive flexible films were characterized by UV–Vis spectroscopy, fieldemission scanning electron microscopy, contact angle measurements and four-point-probe technique for conductivity. Direct morphological observation (FESEM) and electrical measurements indicated that the morphology, conductivity and the nature of deposited PPy films depend on surfactant, surface modification of PET and monomer concentration. In optimized process condition, uniform conductive films of PPy were obtained with good adhesion to PET. 相似文献
3.
Firouzeh Nemati Mehrnoosh Golmohammadi Afkham Ali Elhampour 《Green Chemistry Letters and Reviews》2014,7(1):79-84
Sulfonic acid-functionalized silica-coated nano-Fe3O4particles (Fe3O4@SiO2–SO3H) serve as a novel heterogeneous catalyst for the synthesis of acylals by direct condensation of aldehydes with acetic anhydride under solvent-free conditions at room temperature in short reaction times and excellent yields. The catalyst could be easily separated from the final product using an external magnet and reused several times without consequential loss of reactivity. 相似文献
4.
Mehrnoosh Farahmand Hosein Mohammadzadeh Hossein Mehri-Dehnavi Robabeh Rahimi 《International Journal of Theoretical Physics》2017,56(3):706-719
We study superdense coding with uniformly accelerated particle in single mode approximation and beyond single mode approximation. We use four different functions, the capacity of superdense coding, negativity, discord and the probability of success for evaluating the final results. In single mode approximation, all the four functions behave as expected, however in beyond single mode approximation, except the probability of success, the other three functions represent peculiar behaviors at least for special ranges where the beyond single mode approximation is strong. 相似文献
5.
Abdolkarim Zare Alireza Hasaninejad Mohammad Hassan Beyzavi Ahmad Reza Moosavi-Zare Ali Khalafi-Nezhad Mehrnoosh Roshankar 《Phosphorus, sulfur, and silicon and the related elements》2013,188(7):1702-1712
KF/Al 2 O 3 efficiently catalyzes the microwave-assisted Michael addition of sulfonamides to α,β-unsaturated esters under solvent-free conditions to afford N-alkyl derivatives of sulfonamides as biologically interesting compounds in high yields and in short reaction times. In this reaction, N,N-dialkylsulfonamides are also produced, but in very low yields. 相似文献
6.
In the present paper, we start studying epistemic updates using the standard toolkit of duality theory. We focus on public announcements, which are the simplest epistemic actions, and hence on Public Announcement Logic (PAL) without the common knowledge operator. As is well known, the epistemic action of publicly announcing a given proposition is semantically represented as a transformation of the model encoding the current epistemic setup of the given agents; the given current model being replaced with its submodel relativized to the announced proposition. We dually characterize the associated submodel-injection map as a certain pseudo-quotient map between the complex algebras respectively associated with the given model and with its relativized submodel. As is well known, these complex algebras are complete atomic BAOs (Boolean algebras with operators). The dual characterization we provide naturally generalizes to much wider classes of algebras, which include, but are not limited to, arbitrary BAOs and arbitrary modal expansions of Heyting algebras (HAOs). Thanks to this construction, the benefits and the wider scope of applications given by a point-free, intuitionistic theory of epistemic updates are made available. As an application of this dual characterization, we axiomatize the intuitionistic analogue of PAL, which we refer to as IPAL, prove soundness and completeness of IPAL w.r.t. both algebraic and relational models, and show that the well known Muddy Children Puzzle can be formalized in IPAL. 相似文献
7.
Mehrorang Ghaedi Ardeshir Shokrollahi Raziyeh Mehrnoosh Omid Hossaini Mustafa Soylak 《Central European Journal of Chemistry》2008,6(3):488-496
In the presented work, the conditions for cloud point extraction of iron from aqueous solutions using 7-iodo-8-hydroxyquinolin-5-sulphonic
acid (Ferron) was investigated and optimized. The procedure is based on the separation of its ferron complex into the micellar
media by adding the surfactant Triton X-114. After phase separation, the surfactant-rich phase was dissolved with 1.0 M HNO3
in methanol. Iron was determined by flame atomic absorption spectrometry. Optimization of the pH, ligand and surfactant quantities,
incubation time, temperature, viscosity, sample volume, and interfering ions were investigated. The effects of the matrix
ions were also examined. The detection limits for three times the standard deviations of the blank for iron was 0.4 ng m L-1,
enrichment factor of 19.6 and preconcentration factor of 30 could be achieved. The validity of cloud point extraction was
checked by employing real samples including soil, blood, spinach, milk, meat, liver and orange juice samples using the standard
addition method, which gave satisfactory results.In the presented work, the conditions for cloud point extraction of iron
from aqueous solutions using 7-iodo-8-hydroxyquinolin-5-sulphonic acid (Ferron) was investigated and optimized. The procedure
is based on the separation of its ferron complex into the micellar media by adding the surfactant Triton X-114. After phase
separation, the surfactant-rich phase was dissolved with 1.0 M HNO3 in methanol. Iron was determined by flame atomic absorption spectrometry. Optimization of the pH, ligand and surfactant quantities,
incubation time, temperature, viscosity, sample volume, and interfering ions were investigated. The effects of the matrix
ions were also examined. The detection limits for three times the standard deviations of the blank for iron was 0.4 ng m L−1, enrichment factor of 19.6 and preconcentration factor of 30 could be achieved. The validity of cloud point extraction was
checked by employing real samples including soil, blood, spinach, milk, meat, liver and orange juice samples using the standard
addition method, which gave satisfactory results.
相似文献
8.
Vitamin B12 was applied as catalyst for the one-pot three-component synthesis of 3,4,5-trisubstituted furan-2(5H)-ones from the condensation between aldehydes, amines and dialkylacetylendicarboxylates at ambient temperature in EtOH. In addition, N-aryl-3-aminodihydropyrrol-2-one-4-carboxylates were synthesised using mentioned catalyst at ambient temperature in EtOH from condensation between formaldehyde, amines, and dialkylacetylenedicarboxylates. This methodology has number of advantages such as:use of green and nonhazardous catalyst, clean work up, short reaction times, high yields and no need to column chromatography. 相似文献
9.
A Mild and Environmentally Benign Synthesis of Tetrahydrobenzo[b]pyrans and Pyrano[c]chromenes Using Pectin as a Green and Biodegradable Catalyst 下载免费PDF全文
Pectin was applied as a green and biodegradable catalyst for the one‐pot three‐component synthesis of tetrahydrobenzo[b]pyrans and pyrano[c]chromenes, from the condensation between aromatic aldehydes, malononitrile, and dimedone or 4‐hydroxycumarine at ambient temperature. This protocol has many advantages such as mild conditions, high yields, environmental benignity, simple work‐up procedures, short reaction time, as well as the use of a natural, easily accessible, convenient handling, and inexpensive catalyst. Another advantage of this method is that the products do not require further purification such as column chromatography. 相似文献
10.
Ebrahim Mollashahi Hamideh Gholami Mehrnoosh Kangani Mojtaba Lashkari Malek Taher Maghsoodlou 《Heteroatom Chemistry》2015,26(5):322-328
A green and efficient procedure for the synthesis of α‐aminophosphonates has been developed in water as a green and nonhazardous solvent, from condensation between aromatic aldehydes, aniline, and triphenyl phosphite at 80°C. This methodology has a number of advantages including clean reaction conditions, easy work‐up, and environmentally friendly. 相似文献