@article {49292,
	title = {Copper/Iron cocatalyzed depolymerization of postconsumer polycarbonate: a one-pot strategy to synthesize aryl ethers},
	journal = {ACS SUSTAINABLE CHEMISTRY \& ENGINEERING},
	volume = {12},
	year = {2024},
	month = {DEC 7},
	pages = {18362-18372},
	type = {Journal Article},
	keywords = {aryl ethers, copper/iron cocatalysis, depolymerization, polycarbonates, Value-added products},
	issn = {2168-0485},
	doi = {10.1021/acssuschemeng.4c06990},
	author = {Moyilla, Nageswararao and Padhi, Ganeshdev and Kalsi, Deepti and Barsu, Nagaraju}
}
@article {49421,
	title = {Depolymerization of waste polycarbonates to value-added products},
	journal = {ChemSusChem},
	year = {2024},
	month = {OCT},
	type = {Article; Early Access},
	abstract = {<p>
	Additive free aminolysis method developed for the depolymerization/upcycling of polycarbonates. We report here chemical recycling of polycarbonate under ambient conditions to get its monomer bisphenol A, monoaminocarbamate and biscarbamates in 1 : 2 : 1 ratio respectively. By employing the secondary amine as the aminating reagent, facilitates the depolymerization to work under additive/catalyst free conditions. The developed method deals with depolymerization of waste polycarbonates and works even with late-stage amine derivatives such as amoxapine and desloratadine which are drugs molecules known to treat neurotic disorders and allergies respectively. The reaction can be scaled up and works with similar efficacy which depicts the efficiency of the depolymerization of wasteend-of-life polycarbonate plastic waste. The biscarbamate and bisphenol-A was further subjected for the post functionalization to obtain amides and phenol in good yields. Developed additive/catalyst free aminolysis of waste polycarbonates to carbamates and monomer BPA at ambient conditions. Variety of secondary amines were screened including the late stage amine derivatives like amoxapine and desloratadine which delivered the expected products successfully. Later the developed methodology was even applied for the different end-of-life polycarbonates with the secondary amine and achieved the depolymerization without any obstacle. Further carried out the scale up reaction and derivatization of carbamates and BPA to amide and phenol synthesis. image</p>
},
	keywords = {Aminolysis, carbamates, depolymerization, End-of-life, Polycarbonate},
	issn = {1864-5631},
	doi = {10.1002/cssc.202400756},
	author = {Padhi, Ganeshdev and Pansare, Vaibhav Ramachandra and Bajpai, Priyam and Krishna, Gamidi Rama and Vanka, Kumar and Barsu, Nagaraju}
}
@article {49522,
	title = {Ruthenium-catalyzed deconstruction of polyolefins: a strategy to up-cycle waste polyethylene to value-added alkene},
	journal = {Angewandte Chemie-International Edition},
	volume = {64},
	year = {2025},
	month = {APR},
	type = {Article},
	abstract = {<p>
	Synthesis of value-added products from post-consumer waste polyolefins is fascinating as well as challenging. Here we report ruthenium-catalyzed up-cycling of the polyethylene to long-chain alkene derivatives. The developed methodology mainly involves two steps i.e., dehydrogenation of polyethylene through hydrogen atom transfer and its metathesis using the HG-II catalyst. The dehydrogenation of polyethylene using ruthenium catalysis derived up to 3.38 \%, of double bonds; with 90 \% of the recovered polyolefin material. The obtained unsaturated polyethylene was subjected to cross-metathesis with ethylene using HG-II catalytic system. This resulted in the synthesis of predominantly dodecene (C12) derivatives, with 58 \% selectivity, along with other derivatives of varying chain lengths. The overall reaction produced terminal and internal olefins in the ratio 1:0.8 respectively. The dehydrogenation of polyethylene and its deconstruction was confirmed by NMR spectroscopy, Gel Permeation Chromatography (GPC) and Differential Scanning Calorimetry (DSC). The origin of C12 selectivity has been demonstrated by control experiments. The scope of the methodology was extended to post-consumer waste polyethylene which gave high conversion to value-added dodecene derivatives as a major product.</p>
},
	keywords = {Deconstruction, Homogeneous catalysis, ruthenium, Upcycling, Waste plastic},
	doi = {10.1002/anie.202422609},
	author = {Padhi, Ganeshdev and Khopade, Kishor V. and Moyilla, Nageswararao and Rangappa, Raghavendrakumar and Chikkali, Samir H. and Barsu, Nagaraju}
}
