Iranian Journal of Catalysis

In this paper, undoped ZnO and Co-ZnO nano structures with different molar ratio of Cobalt have been synthesized by the sonochemical method. Structure have been characterized by Fourier Transform (FTIR) and UV–Vis spectroscopy, field emission Scanning Electron Microscopy (FE-SEM), Energy Dispersive Analytical X-Ray (EDAX), and X-Ray Diffraction (XRD) methods. Moreover, the direct band gap has been calculated by Tauc’s approach. Moreover, mean crystal size has been estimated by Scherrer equation. Furthermore, photocatalytic activity for all samples has been investigated under UV irradiation in an aqueous medium. Compared with pure ZnO, the band gap of the Co-ZnO has been shown decrease and it is dependent on the content of dopants. Also, photocatalytic activity improves in the presence of cobalt dopant.

Khodadadi Bahar

Bordbar Maryam

Iranian journal of catalysis

Sonochemical synthesis of undoped and Co-doped ZnO nanostructures and investigation of optical and photocatalytic properties

无掺杂及Co掺杂ZnO纳米结构的声化学合成及其光学和光催化性能研究

Catalytic activity of AlHMS was investigated as a cheap heterogeneous reusable catalyst in some multi-component reactions for the synthesis of various chromenes. Three-component reaction of 2-hydroxy-naphtoquinone with an aromatic aldehyde and dimedone or barbituric acid in H2O under reflux conditions was performed using AlHMS in relatively good yields. The approach was more extended using psuedo five-component reaction of 2,5-dihydroxy-1,4-benzoquinone, two equivalent of an aromatic aldehyde and two equivalent of dimedone or 1,3-cyclohexadione with efficient catalytic effect of AlHMS. Threecomponent reaction of an aldehyde, malononitrile and 1-naphthol in the presence of AlHMS gave 2-amino-4-phenyl-4Hbenzo[h]chromene-3-carbonitriles in high yields. The work-up procedures are very simple, and the products do not require further purification. The catalysts can be recycled and reused for several times without observable loss of performance.

Hajimohammadi Mahdi

AlHMS as an efficient catalyst for the synthesis of chromenes derivatives

AlHMS作为合成色烯衍生物的高效催化剂

In the present work; we have developed a mild, efficient, environmentally benign method for the synthesis of tetrahydrobenzo[b]pyran derivatives via a three-component cyclocondensation of aldehydes, malononitrile and dimedone utilizing ammonium chloride as a simple, easily available and cost effective catalyst under microwave irradiation in excellent yield. This method has several attracting features such assimple experimental set up, easy work up procedure, cleaner reaction profile high conversionsand shorter reaction time affording the products in moderate to excellent yield. The use of MW irradiation and a catalytic amount of NH4Cl was successful to afford excellent yield of products in shorter reaction time. Thus the present method provides a valuable addition to the existing methods for the synthesis of these heterocyclic compounds.

Vijay P. Pagore

Sunil U. Tekale

Vivekanand B. Jadhav

Rajendra P. Pawar

Ammonium chloride catalyzed microwave-assisted synthesis of tetrahydrobenzo[b]pyrans

氯化铵催化微波辅助合成四氢苯并[b]吡喃

Thiamine hydrochloride (Vitamin-B1) has been utilized as an effective biodegradable catalyst for the one pot synthesis of polyhydroquinoline derivatives via four component reaction of dimedone, aldehyde, ethylacetoacetate and ammonium acetate in ethanol under mild conditions. The method presented here offers several advantages over reported procedures in terms of environmentally benign catalytic system and excellent product yields (75-98%) of polyhydroqninoline compounds. Aromatic and heteroaryl aldehyde with electron donating as well as electron withdrawing group undergo smooth reaction to afford the corresponding polyhydroquinoline derivatives. The synthesized polyhydroquinoline compounds were characterized by IR, NMR and Mass spectral data. The present article describes the new application of Vitamin-B1.

gholap somnath

gunjal navnath

THIAMINE HYDROCHLORIDE (VIT-B1): AN OPTIMIZED GREEN ALTERNATIVE FOR THE SYNTHESIS OF POLYHYDROQUINOLINE DERIVATIVES

盐酸硫胺素（维生素B1）：合成多氢喹啉衍生物的优化绿色替代方案

Silica Vanadic Acid, SVA, (oxo-vanadium has been supported on silica) as a dual Lewis and Bronsted acid ability was prepared and efficiently catalyzed one-pot multi-component condensation of enolizable ketones or alkyl acetoacetates with aromatic aldehydes, acetonitrile and acetyl chloride. The described reaction was produced β-acetamido ketone or ester derivatives in high to excellent yields in relatively short reaction times in heterogeneous catalytic system at room temperature. Other advantages of this method is applicable at large scales without significant loss of the yields. In addition, this method is superior to reported methods, for the synthesis of β-acetamido ketone or ester derivatives.

Malihe Safaiee

Mohammad Ali Zolfigol

Fatemeh Derakhshan-Panah

Mohammad Mokhlesi

Application of silica vanadic acid as a dual Lewis and Bronsted acid catalytic ability in Dakin West reaction

硅钒酸作为Dakin-West反应中双Lewis和Bronsted酸催化剂的应用

A modified carbon paste electrode with NiO nanoparticles showed an excellent electrocatalytic behavior towards loratadine in the voltammetric and chronoamperometric approaches. Typical plots of IC/IL vs. t1/2 were contracted, and an average rate constant of 185.5 ± 2.2 M−1 s−1 was obtained from the slope of the curve. The geometric surface area of the electrode was 0.0314 cm2, and an average D-value of (1.11×10−3 ± 1.16×10−4) m2 s−1 was obtained for the diffusion of loratadine (Lor) towards the electrode surface. When the effective surface area (0.245 cm2) was used in calculations, an average D-value of (1.83×10−5 ± 1.96×10−6) cm2 s−1 was obtained. ∆I response is the peak current difference of the electrode at a fixed time when Lor analyte was added, and it is in proportion to the loratadine concentration in the range of 20-1000 nM. The limit of detection (LOD) and the limit of quantification (LOQ) of the method were 1.4 and 4.7 nM Lor when the 3Sb/m and 10Sb/m criteria were used, respectively.

Neda Raeisi-Kheirabadi

Alireza Nezamzadeh-Ejhieh

Hamidreza Aghaei

Electrochemical amperometric sensing of loratadine using NiO modified paste electrode as an amplified sensor

使用NiO修饰糊状电极作为放大传感器的氯雷他定电化学安培传感

Cobalt-based perovskites containing strontium and copper (La1-xSrxCo1-yCuyO3) were synthesized by the sol-gel method and characterized by XRD, H2-TPR, N2-adsorbtion, XRF and XPS techniques. The XRD results showed that the rhombohedral structure of perovskites was obtained. The activation energy employed to analyze the activities of samples in the combustion of methane was optimized using full factorial design (FD) by considering strontium (x=0, 0.1 and 0.2) and copper (y=0, 0.25 and 0.5) as the input variables. Analysis of Variance (ANOVA) was employed to investigate the obtained data and a p

Hamzeh Rezaei Shadegan

Sarah Maghsoodi

Bijan Ghanavati

Amirhossein Shahbazi Kootenaei

Alireza Azimi

Effects of strontium and copper substitution on the catalytic performance of LaCoO3 in the combustion of methane: an optimization study

锶和铜掺杂对LaCoO3催化甲烷燃烧性能的影响：一项优化研究

使用NiO修饰糊状电极进行氯雷他定的电化学电流分析传感

使用NiO修饰糊状电极的氯雷他定电化学安培传感作为放大传感器

短名
Journal Impact	2.78
国际分区	CHEMISTRY, PHYSICAL(Q3)

ISSN	2252-0236, 2345-4865
h-index	25

涉及主题	化学有机化学生物化学生物催化作用物理材料科学工程类量子力学化学工程复合材料组合化学冶金物理化学无机化学溶剂热力学纳米技术
出版信息	出版商: Islamic Azad University，出版周期: ，期刊类型: journal，开源期刊: 否
基本数据	创刊年份: 2012，原创研究文献占比: 97.22%，自引率:14.30%， Gold OA占比: 0.00%
平均审稿周期	网友分享经验：8 Weeks

Iranian Journal of Catalysis

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Sonochemical synthesis of undoped and Co-doped ZnO nanostructures and investigation of optical and photocatalytic properties

AlHMS as an efficient catalyst for the synthesis of chromenes derivatives

Ammonium chloride catalyzed microwave-assisted synthesis of tetrahydrobenzo[b]pyrans

THIAMINE HYDROCHLORIDE (VIT-B1): AN OPTIMIZED GREEN ALTERNATIVE FOR THE SYNTHESIS OF POLYHYDROQUINOLINE DERIVATIVES

Application of silica vanadic acid as a dual Lewis and Bronsted acid catalytic ability in Dakin West reaction

Electrochemical amperometric sensing of loratadine using NiO modified paste electrode as an amplified sensor

Effects of strontium and copper substitution on the catalytic performance of LaCoO3 in the combustion of methane: an optimization study

Effects of strontium and copper substitution on the catalytic performance of LaCoO3 in the combustion of methane: an optimization study

Electrochemical amperometric sensing of loratadine using NiO modified paste electrode as an amplified sensor

Electrochemical amperometric sensing of loratadine using NiO modified paste electrode as an amplified sensor