Catalytic Depolymerization of Polymers Containing Electrophilic Linkages Using Nucleophilic Reagents
申请人:Hedrick James Lupton
公开号:US20110004014A1
公开(公告)日:2011-01-06
The disclosure relates to methods and materials useful for depolymerizing a polymer. In one embodiment, for example, the disclosure provides a method for depolymerizing a polymer containing electrophilic linkages, wherein the method comprises contacting the polymer with a nucleophilic reagent in the presence of a guanidine-containing compound. The methods and materials of the disclosure find utility, for example, in the field of waste reclamation and recycling.
Two novel 3D copper(II) complexes based on a rigid bis-pyridyl-bis-amide and two polycarboxylates mixed ligands: Assembly, structures and properties
作者:Xiu-Li Wang、Bao Mu、Hong-Yan Lin、Song Yang、Guo-Cheng Liu
DOI:10.1016/j.molstruc.2012.12.001
日期:2013.3
constructed from two-dimensional (2D) Cu(II)-μ2-OH-3-bpcb layers (3-bpcb: μ4-bridging coordination mode via two pyridyl nitrogen and two carbonyl oxygen atoms) and the 1,2-BDC bridging ligands. Complex 2 is also a 3D coordinationpolymer constructed from the μ2-bridging 3-bpcb ligands (via two pyridyl nitrogen atoms) and the 2D Cu(II)-μ3-OH-SIP sheets containing tetranuclear copper clusters, showing a
Probing the intermolecular interactions of aromatic amides containing N-heterocycles and triptycene
作者:Nongyi Cheng、Qifan Yan、Shuai Liu、Dahui Zhao
DOI:10.1039/c4ce00089g
日期:——
A series of aromatic amides incorporated with N-heterocycles or triptycene units are synthesized and studied for probing the effects of such chemical modifications on the intermolecular interactions. Single crystals of a number of heterocyclic amides and the triptycene-containing amide were obtained. Crystal structures, hydrogen bonds, lattice energy, solubility, and melting points were compared amongst relevant molecules. Suitably positioned nitrogen atoms from heterocycles are found to form intramolecular H-bonds with amide NHs at the expense of weakening or disrupting the intermolecular H-bonds. The effects of such H-bonding changes on solubility and melting point are nonetheless limited. Uniquely, the triptycene unit effectively improves the solubility of the amide without tempering the thermal resistance of the molecule.
Irreversible Amide‐Linked Covalent Organic Framework for Selective and Ultrafast Gold Recovery
作者:Hai‐Long Qian、Fan‐Lin Meng、Cheng‐Xiong Yang、Xiu‐Ping Yan
DOI:10.1002/anie.202006535
日期:2020.9.28
preparation of an irreversible amide‐linked covalent organic framework (COF) JNU‐1 via a building block exchange strategy for efficient recovery of gold. JNU‐1 was synthesized through the exchange of 4,4′‐biphenyldicarboxaldehyde (BA) in mother COF TzBA consisting of 4,4′,4′′‐(1,3,5‐triazine‐2,4,6‐triyl)trianiline (Tz) and BA with terephthaloyl chloride. The irreversible amide linked JNU‐1 gave good stability
Curable compositions are disclosed which contain (I) an advanced resin composition prepared by reacting epoxy resins with active hydrogen-containing compounds which contain mesogenic moieties and (II) a suitable curing agent.