2700-23-4Relevant academic research and scientific papers
Facile Synthesis of Porphyrin Based Covalent Organic Frameworks via an A2B2 Monomer for Highly Efficient Heterogeneous Catalysis
Hao, Wenjing,Chen, Dan,Li, Yusen,Yang, Zongfan,Xing, Guolong,Li, Juan,Chen, Long
, p. 8100 - 8105 (2019)
A new porphyrin covalent organic framework (A2B2-Por-COF) was readily constructed via self-polycondensation of an A2B2 porphyrin monomer. In contrast to the previously reported porphyrin COFs prepared by co-cond
Assembly of Two Self-Interpenetrating Metal-Organic Frameworks Based on a Trigonal Ligand: Syntheses, Crystal Structures, and Properties
Fan, Yuhang,Guo, Feng,Shi, Wenbing,Su, Changhua,Zhang, Xiuling
, (2020)
Two self-interpenetrating metal-organic frameworks (MOFs) 1 and 2 were designed and constructed through the coordination self-assembly of transition metal nodes and a trigonal ligand. They both exhibit interesting three-dimensional constructions with the
Reaction kinetics investigation of Malononitrile with substituted benzaldehydes in aqueous solutions of ethaline as deep eutectic solvent
Abbasi, Mostafa,Harifi-Mood, Ali Reza,Lotfi Nosood, Yazdanbakhsh
, p. 513 - 519 (2020)
Due to increasing demands for ecofriendly processes within the framework of green chemistry, and having shown substantial properties, especially in terms of toxicity, biodegradability, cost, and ease of preparation under ambient conditions, deep eutectic
Polyionic liquid decorated chitosan beads as versatile metal-free catalysts for catalyzing chemical reactions in aqueous media
Koohestani, Fatemeh,Sadjadi, Samahe
, (2021/04/19)
A new strategy is presented for enhancing the catalytic activity of cross-linked chitosan beads. More precisely, chitosan beads were cross linked with glutaraldehyde and then, vinyl functionalized. In the next step, the vinyl-functionalized beads were pol
Biguanide-functionalized hierarchical porous covalent organic frameworks for efficient catalysis of condensation reactions
Feng, Huiru,Gong, Kai,Li, Cunhao,Li, Haoran,Wang, Yunyun,Zhang, Daquan,Zhang, Huimin
, (2021/07/21)
Covalent organic frameworks (COFs) can be rationally designed with desired physicochemical properties for a far-ranging application in catalytic systems. Herein, a biguanide-functionalized covalent organic framework was designed and prepared via N-alkylat
Design and Development of Amine Functionalized Mesoporous Cubic Silica Particles: A Recyclable Catalyst for Knoevenagel Condensation
Gupta, Padmini,Kumar, Lalita S.,Kumar, Yogesh,Shabir, Javaid
, (2021/07/28)
Abstract: The amine functionalized cubic mesoporous silica nanoparticles (cSiO2-NH2) were successfully synthesized through biphasic stratification approach. The synthesized material was characterised by various spectroscopic and phys
Bis [hydrazinium (1+)] hexafluoridosilicate:(N2H5)2SiF6 novel hybrid crystal as an efficient, reusable and environmentally friendly heterogeneous catalyst for Knoevenagel condensation and synthesis of biscoumari
El hajri, Fatima,Benzekri, Zakaria,Sibous, Sarra,Ouasri, Ali,Boukhris, Said,Hassikou, Amina,Rhandour, Ali,Souizi, Abdelaziz
, (2021/02/03)
A simple, effective, green and nontoxic protocol was used for the Knoevenagel condensation and the biscoumarin derivatives synthesis. It have demonstrated that the use of a new hybrid crystal as a heterogeneous catalyst makes it possible to obtain several
Highly active zinc oxide-supported lithium oxide catalyst for solvent-free Knoevenagel condensation
Basude, Manohar,Bhongiri, Yadagiri,Masula, Keshavulu,Pasala, Vijay Kumar,Puppala, Veerasomaiah,Sunkara, Prasad
, (2021/07/09)
Li2O/ZnO catalyst was prepared by wet impregnation method and characterized by XRD, SEM, EDX, FTIR, BET surface area and UV-Vis diffuse reflectance spectroscopy. This study revealed a decrease in average particle size and change in the shape of
Supported copper on a diamide-diacid-bridged PMO: an efficient hybrid catalyst for the cascade oxidation of benzyl alcohols/Knoevenagel condensation
Dekamin, Mohammad G.,Valiey, Ehsan
, p. 437 - 450 (2022/01/20)
In this study, a novel periodic mesoporous organosilica (PMO) containing diamide-diacid bridges was conveniently prepared using ethylenediaminetetraacetic dianhydride to support Cu(ii) species and affording supramolecular Cu@EDTAD-PMO nanoparticles efficiently. Fourier transform infrared (FT-IR) and energy dispersive X-ray (EDX) spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Brunauer-Emmett-Teller (BET) analysis, and high-resolution transmission electron microscopy (HRTEM) results confirmed the successful synthesis of Cu@EDTAD-PMO. The stabilized Cu(ii) nanoparticles inside the mesochannels of the new PMO provided appropriate sites for selective oxidation of different benzyl alcohol derivatives to their corresponding benzaldehydes and subsequent Knoevenagel condensation with malononitrile. Therefore, Cu@EDTAD-PMO can be considered as a multifunctional heterogeneous catalyst, which is prepared easily through a green procedure and demonstrates appropriate stability with almost no leaching of the Cu(ii) nanoparticles into the reaction medium, and easy recovery through simple filtration. The recycled Cu@EDTAD-PMO was reused up to five times without significant loss of its catalytic activity. The stability, recoverability, and reusability of the designed heterogeneous catalyst were also studied under various reaction conditions.
Nanochannel {InZn}-Organic Framework with a High Catalytic Performance on CO2Chemical Fixation and Deacetalization-Knoevenagel Condensation
Chen, Hongtai,Zhang, Zhengguo,Hu, Tuoping,Zhang, Xiutang
, p. 16429 - 16438 (2021/11/01)
The rare combination of InIII 5p and ZnII 3d in the presence of a structure-oriented TDP6- ligand led to a robust hybrid material of {(Me2NH2)[InZn(TDP)(OH2)]·4DMF·4H2O}n (NUC-42) with the interlaced hierarchical nanochannels (hexagonal and cylindrical) shaped by six rows of undocumented [InZn(CO2)6(OH2)] clusters, which represented the first 5p-3d nanochannel-based heterometallic metal-organic framework. With respect to the multifarious symbiotic Lewis acid-base and Br?nsted acid sites in the high porous framework, the catalytic performance of activated NUC-42a upon CO2 cycloaddition with styrene oxide was evaluated under solvent-free conditions with 1 atm of CO2 pressure, which exhibited that the reaction could be well completed at ambient temperature within 48 h or at 60 °C within 4 h with high yield and selectivity. Moreover, because of the acidic function of metal sites and a central free pyridine in the TDP6- ligand, deacetalization-Knoevenagel condensation of acetals and malononitrile could be efficiently facilitated by an activated sample of NUC-42a under lukewarm conditions.
