Biomass waste-derived porous carbons (BWDPCs) are a class of complex materials that are widely used in sustainable waste management and carbon capture. However, their diverse textural properties, the presence of various functional groups, and the varied temperatures and pressures to which they are subjected during CO 2 adsorption make it challenging to understand the underlying mechanism of CO 2 adsorption. Here, we compiled a data set including 527 data points collected from peer-reviewed publications and applied machine learning to systematically map CO 2 adsorption as a function of the textural and compositional properties of BWDPCs and adsorption parameters. Various tree-based models were devised, where the gradient boosting decision trees (GBDTs) had the best predictive performance with R 2 of 0.98 and 0.84 on the training and test data, respectively. Further, the BWDPCs in the compiled data set were classified into regular porous carbons (RPCs) and heteroatom-doped porous carbons (HDPCs), where again the GBDT model had R 2 of 0.99 and 0.98 on the training and 0.86 and 0.79 on the test data for the RPCs and HDPCs, respectively. Feature importance revealed the significance of adsorption parameters, textural properties, and compositional properties in the order of precedence for BWDPC-based CO 2 adsorption, effectively guiding the synthesis of porous carbons for CO 2 adsorption applications.

The miscibility behavior of poly(2,2-dichloroethyl methacrylate) (PDCEMA) and poly(2,2,2-trichloroethyl methacrylate) (PTCEMA) with various polymethacrylates was examined using differential scanning calorimetry. PDCEMA and PTCEMA are both miscible with poly(methy1 methacrylate), poly-(ethyl methacrylate), poly(n-propyl methacrylate) (PnPMA), poly(isopropy1 methacrylate) (PiPMA), poly-(tetrahydrofurfuryl methacrylate), and poly(cyclohexy1 methacrylate) but immiscible with poly(n-hexyl methacrylate). They differ in those cases involving poly(n-butyl methacrylate) (PnBMA), poly(n-amyl methacrylate) (PnAMA), and poly(isoamy1 methacrylate) (PiAMA). PDCEMA, but not PTCEMA, is miscible with PnBMA and PiAMA. PDCEMA has a limited miscibility with PnAMA, but PTCEMA is immiscible with PnAMA. Miscible blends of PDCEMA with PnPMA, PiPMA, PnBMA, and PiAMA showed lower critical solution temperature behavior. PDCEMA shows a wider range of miscibility with polymethacrylates than PTCEMA and other chlorine-containing polymethacrylates such as poly(chloromethy1 methacrylate), poly( 1-chloroethyl methacrylate), poly(2-chloroethyl methacrylate), and poly(3-chloropropyl methacrylate). The good miscibility of PDCEMA appears to be correlated to the acidic hydrogen in the pendant -CHCl:, group.

A total synthesis of the vancomycin aglycon 1 has eluded synthetic chemists for so many years that the preparation of this molecule has become a vendetta for some groups. Finally, and almost simultaneously, research teams led by Evans and by Nicolaou have succeeded. Similarities and differences in their synthetic approaches are highlighted herein.

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The miscibility of poly(hydroxy ether of Bisphenol A) (phenoxy) with poly(2,2-dichloroethyl methacrylate-co-methyl methacrylate) (DCEMA-MMA) was studied by differential scanning calorimetry and Fourier-transform infrared spectroscopy. The three binary homopolymer pairs, phenoxy/poly(methyl methacrylate) (PMMA) , phenoxy/poly(2,2-dichloroethyl methacrylate) (PDCEMA), and PDCEMA/PMMA, are miscible. However, phenoxy is immiscible with DCEMA-MMA when the MMA content in the copolymer is between 64 and 98 wt % , showing an immiscibility window. Infrared studies showed that phenoxy interacts more strongly with PDCEMA than with PMMA or DCEMA-MMA copolymers.