@article { ISI:000330812400022, title = {Single-pot formation of THFAL via catalytic hydrogenation of FFR over Pd/MFI catalyst}, journal = {ACS Sustainable Chemistry \& Engineering}, volume = {2}, number = {2}, year = {2014}, month = {FEB}, pages = {272-281}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Furfural (FFR) was selectively hydrogenated in a single pot to tetrahydrofurfuryl alcohol (THFAL) over a Si MFI molecular sieve supported Pd catalyst. Studies on catalyst screening revealed that both the metal function and the support were critical for directing the selectivity to the ringhydrogenated product, THFAL. The structural feature of MFI as shown by XRD was completely retained in the used sample of the 3\% Pd/MFI catalyst confirming its stability under reaction conditions. XRD, along with SEM characterization of the used samples, established retention of morphology of the structured silicate, suggesting a strong interaction between hexagonal porous silicate and Pd particles. The complete conversion of FFR with an enhanced selectivity of 95\% to THFAL could be achieved by recycling the crude of the first hydrogenation experiment over the same 3\% Pd/MFI catalyst.

}, keywords = {Biomass conversion, Hydrogenation, Pd/MFI, Recyclability, THFAL}, issn = {2168-0485}, doi = {10.1021/sc400302b}, author = {Biradar, Narayan S. and Hengne, Amol M. and Birajdar, Shobha N. and Niphadkar, Prashant S. and Joshi, Praphulla N. and Rode, Chandrashekhar V.} } @article {47163, title = {Three-dimensional printing with waste high-density polyethylene}, journal = {ACS Applied Polymer Materials}, volume = {1}, year = {2019}, month = {NOV}, pages = {3157-3164}, type = {Article}, abstract = {

Fused filament fabrication (FFF) three-dimensional (3D) printing of semicrystalline polymers such as high density polyethylene (HDPE) is challenging because crystallization-induced shrinkage of the filament, as it cools, results in stresses that warp the printed part and debond it from the print substrate. Here, we demonstrate that waste-derived HDPE can be successfully 3D printed by (i) blending with a small fraction (\<0.5\% by weight) of dimethyl dibenzylidene sorbitol (DMDBS) and (similar to 10\%) linear low density polyethylene (LLDPE) and (ii) printing the object with a thin {\textquoteleft}{\textquoteleft}brim{\textquoteright}{\textquoteright} around it that is adhered to the print substrate using common polyvinyl acetate-based glue. We match our experimental results with FEM simulations that provide insight into the origin of the stresses developed during printing. Because HDPE forms a significant fraction of the plastic waste stream, conversion of waste-derived HDPE to 3D printing filament has important technological implications.

}, keywords = {3d printing polyethylene printing, polymer blend, Recyclability, warpage}, issn = {2637-6105}, doi = {10.1021/acsapm.9b00813}, author = {Gudadhe, Aniket and Bachhar, Nirmalya and Kumar, Anil and Andrade, Prem and Kumaraswamy, Guruswamy} } @article {48782, title = {Recyclable Pd nanoparticles immobilized on amine functionalized LDH for the Suzuki-Miyaura cross-coupling reaction}, journal = {Chemical Papers}, volume = {77}, year = {2023}, month = {SEP}, pages = {5555-5569}, type = {Article}, abstract = {

In the present work, we invented a Pd nanoparticle immobilized on an amine-functionalized LDH catalyst (PdNP@NH2LDH-Al-MCM-41) for cross-coupling reactions. The palladium was grafted onto the support by treating the Pd(OAc)(2) with NH2-LDH-Al-MCM-41 in acetone at room temperature. The prepared catalyst was characterized by FT-IR, SEM, TGA, TEM, and XPS techniques. The TEM characterization of the catalyst showed the uniform distribution of PdNPs with sizes ranging from 3 to 6 nm located inside the mesoporous. The Suzuki-Miyaura cross-coupling reaction was used to demonstrate the catalytic efficiency of the prepared PdNPs@NH2-LDH-Al-MCM-41 catalyst. The prepared and analyzed catalyst showed good to excellent activity in the Suzuki-Miyaura cross-coupling reaction of various aryl bromides with different aryl boronic acids in ethanol at 80 degrees C. The catalyst showed TON up to similar to 47 and TOF similar to 47 h(-1). The catalytic results exhibited that the catalyst is completely recoverable with simple filtration. The catalytic efficiency shows a slight decrease in activity for the Suzuki-Miyaura cross-coupling reactions even after five repeated recycles. TEM images of the freshly prepared and reused catalysts (after five catalytic cycles) showed palladium nanoparticles remain unchanged at the end of the reactions. [GRAPHICS] .

}, keywords = {LDH, PdNPs, Recyclability, Suzuki-Miyaura coupling}, issn = {0366-6352}, doi = {10.1007/s11696-023-02885-2}, author = {Patil, Seema P. P. and Jadhav, Sanjay N. N. and Inamdar, Firoz A. A. and Ameen, Mohd Aatif and Rode, Chandrashekhar V. V. and Rajmane, Archana S. S. and Kumbhar, Arjun S. S.} } @article {49647, title = {ZrO2 supported Cu nanoparticles for sonogashira and ullmann coupling reactions under palladium-free conditions}, journal = {Catalysis Letters}, volume = {154}, year = {2024}, month = {JUN}, pages = {3078-3090}, type = {Article}, abstract = {

Cu nanoparticles supported on ZrO2 (CuNPs@ZrO2) were synthesized using a one-step co-precipitation process, and their application in C-C coupling reactions was investigated. The catalyst was characterized using XRD, XPS, SEM, TEM, and TGA techniques. The prepared catalyst was used for the Sonogashira cross-coupling reactions of aryl bromides with phenyl-acetylene in the presence of K2CO3 in DMF at 110 degrees C, which resulted in substituted alkynes with good to excellent yields. The protocol was also extended for the Ullmann coupling reactions of aryl iodides under similar reaction conditions, yielding the desired products with good to excellent yields without homo-coupling. Interestingly, unlike other copper catalysts, the present catalyst worked under air and did not require an inert atmosphere to prevent alkyne. This catalytic system is versatile, tolerant, and significantly cheaper than the {\textquoteleft}{\textquoteleft}traditional{\textquoteright}{\textquoteright} Pd-catalyzed Sonogashira cross-coupling of terminal alkynes with aryl halides. The catalyst could be reused for five catalytic cycles with no significant change in the product yield. All of these characteristics make our prepared CuNPs@ZrO2 catalyst quite suitable for the gram-scale synthesis of biaryls and alkynes, with a simple workup.{GRAPHIACAL ABSTRACT

}, keywords = {CuNPs, Recyclability, Sonogashira coupling, Ullmann coupling, ZrO2}, issn = {1011-372X}, doi = {10.1007/s10562-023-04513-w}, author = {Patil, Seema P. and Rajmane, Archana S. and Jadhav, Sanjay N. and Rajmane, Vijaya S. and Rode, Chandrashekhar V. and Kumbhar, Arjun S.} } @article {49762, title = {Harnessing DABCO ionic salts for synthesis of heterocycles via multi-component reactions}, journal = {Chemical Papers}, volume = {79}, year = {2025}, month = {SEP}, pages = {5625-5660}, type = {Review}, abstract = {

The review article discusses the advancements in synthesis and applications of acidic, basic, and neutral 1,4-diazabicyclo[2.2.2]octane (DABCO) ionic salts in multi-component reactions. Compared to imidazolium-based ionic salts, the number of DABCO-based ionic salts is significantly lower. Recently, there has been increasing focus on these salts due to their selective salt formation capabilities. A significant challenge lies in the limited availability of physical data regarding DABCO-based ionic salts; hence, most of them are not ionic liquids. While many of these salts could be reused several times with only a minimal reduction in their catalytic effectiveness, there is a significant limitation in the availability of DABCO-based salts.

}, keywords = {1, 4-Diazabicyclo[2.2.2]octane, Ionic salts, Multi-component reactions, Recyclability}, issn = {0366-6352}, doi = {10.1007/s11696-025-04189-z}, author = {Rajmane, Archana and Narande, Poonam and Patil, Nita and Kumbhar, Arjun} }