Metal-Free Heptazine-Based Porous Polymeric Network as Highly Efficient Catalyst for CO Capture and Conversion.

The capture and catalytic conversion of CO into value-added chemicals is a promising and sustainable approach to tackle the global warming and energy crisis. The nitrogen-rich porous organic polymers are excellent materials for CO capture and separation. Herein, we present a nitrogen-rich heptazine-based microporous polymer for the cycloaddition reaction of CO with epoxides in the absence of metals and solvents.

Co-Catalyst-Free Chemical Fixation of CO into Cyclic Carbonates by using Metal-Organic Frameworks as Efficient Heterogeneous Catalysts.

The concentration of carbon dioxide (CO ) in the atmosphere is increasing at an alarming rate resulting in undesirable environmental issues. To mitigate this growing concentration of CO , selective carbon capture and storage/sequestration (CCS) are being investigated intensively. However, CCS technology is considered as an expensive and energy-intensive process.

Molecular Basis of Water Sorption Behavior of Rivaroxaban-Malonic Acid Cocrystal.

The present study aims to investigate the molecular basis of water sorption behavior of rivaroxaban-malonic acid cocrystal (RIV-MAL). It was hypothesized, that the amount of water sorbed by a crystalline solid is governed by the surface molecular environment of different crystal facets and their relative abundance to crystal surface. Water sorption behavior was measured using a dynamic vapor sorption analyzer.

Environmentally Friendly, Co-catalyst-Free Chemical Fixation of CO at Mild Conditions Using Dual-Walled Nitrogen-Rich Three-Dimensional Porous Metal-Organic Frameworks.

Highly porous, polyhedral metal-organic frameworks (MOFs) of Co(II)/Ni(II), {[M(TATAB)(DABCO)(HO)]·12DMF·9HO} (where M = Co(II) (1)/Ni(II) (2), HTATAB = 4,4',4″- s-triazine-1,3,5-triyl-tri- p-aminobenzoic acid, and DABCO = 1,4-diazabicyclo[2.2.2]octane) have been synthesized solvothermally.

Palladium(II)/N-Heterocyclic Carbene Catalyzed One-Pot Sequential α-Arylation/Alkylation: Access to 3,3-Disubstituted Oxindoles.

Rationally designed fluorene-based mono- and bimetallic Pd-PEPPSI complexes were synthesized and demonstrated to be effective for the one-pot sequential α-arylation/alkylation of oxindoles. This streamlined approach offers efficient access to functionalized 3,3-disubstituted oxindoles in excellent yields (up to 89%) under mild reaction conditions.

Correlating Single Crystal Structure, Nanomechanical, and Bulk Compaction Behavior of Febuxostat Polymorphs.

Febuxostat exhibits unprecedented solid forms with a total of 40 polymorphs and pseudopolymorphs reported. Polymorphs differ in molecular arrangement and conformation, intermolecular interactions, and various physicochemical properties, including mechanical properties. Febuxostat Form Q (FXT Q) and Form H1 (FXT H1) were investigated for crystal structure, nanomechanical parameters, and bulk deformation behavior.

Effect of differential surface anisotropy on performance of two plate shaped crystals of aspirin form I.

Differential surface anisotropy of different crystals of the same API can have a significant impact on their pharmaceutical performance. The present work investigated the impact of differential surface anisotropy of two plate-shaped crystals of aspirin (form I) on their hygroscopicity, stability and compaction behavior. These crystals differed in their predominant facets (100) and (001) and were coded as AE-100 & E-001.

Construction of 3-Fold-Interpenetrated Three-Dimensional Metal-Organic Frameworks of Nickel(II) for Highly Efficient Capture and Conversion of Carbon Dioxide.

A series of three new isostructural metal-organic frameworks (MOFs) of nickel(II), [{Ni(muco)(bpa)(2HO)}·2HO] (1), [{Ni(muco)(bpe)(2HO)}·2.5HO] (2), and [{Ni(muco)(azopy)(2HO)}·2HO] (3) [where muco = trans,trans-muconate dianion, bpa = 1,2-bis(4-pyridyl)ethane, bpe = 1,2-bis(4-pyridyl)ethylene, and azopy = 4,4'-bis(azobipyridine)], have been synthesized and characterized by single-crystal X-ray diffraction analysis and other physicochemical methods. Compounds 1-3 exhibit an interesting 3-fold-interpenetrated three-dimensional pillar-layered framework structure constituted of 4-coordinating (4-c) Ni nodes with {6}-neb net topology.