Tetra­aqua­bis(5-hydroxy­nicotinato-κN)cadmium(II)

The title compound, [Cd(C6H4NO3)2(H2O)4], was obtained by the reaction of cadmium chloride with 5-hydroxy­nicotinic acid. The CdII atom is located on an inversion centre and is coordinated by two N atoms from two 5-hydroxy­nicotinic acid ligands and four water mol­ecules in a distorted octa­hedral geometry. The structure is stabilized by inter­molecular O—H⋯O hydrogen bonds, forming a three-dimensional network

Penta­aqua­[2-(5-carboxyl­ato-2-oxido-1-pyridinio)acetato]zinc(II) monohydrate

In the title compound, [Zn(C8H5NO5)(H2O)5]·H2O, the ZnII atom is coordinated by one O atom from the 2-(5-carboxyl­ato-2-oxidopyridinium-1-yl)acetate ligand and by five water mol­ecules, forming a distorted octa­hedral geometry. Coordinated and uncoordinated water mol­ecules form O—H⋯O hydrogen bonds, leading to a three-dimensional framework

Bis(μ-5-carboxyl­ato-1-carboxyl­ato­methyl-2-oxidopyridinium)-κ2 O 5:O 1;κ2 O 1:O 5-[diaqua­(phenan­throline-κ2 N,N′)manganese(II)] dihydrate

The centrosymmetric binuclear title complex, [Mn2(C8H5NO5)2(C12H8N2)2(H2O)4]·2H2O, was obtained by the reaction of manganese chloride with 5-carb­oxy-1-carboxy­methyl-2-oxidopyridinium and 1,10-phenanthroline. The MnII atom is coordinated by two N atoms from the 1,10-phenanthroline ligand, two O atoms from two 5-carboxyl­ato-1-carboxyl­atomethyl-2-oxidopyridinium ligands and two water mol­ecules, leading to a distorted octahedral MnN2O4 environment. Inter­molecular O—H⋯O hydrogen bonds link neighbouring mol­ecules into a layer structure parallel to (001)

A nanoporous graphene analog for superfast heavy metal removal and continuous-flow visible-light photoredox catalysis

A metal-free conjugated porous polymer offers remarkable capabilities crucial for green and sustainable technologies, including removing 99.9% of lead from water within minutes, catalyzing quantitatively the Knoevenagel reaction in water, donor–acceptor units boosting photocatalytic activity and implementation in a continuous flow reactor.</p