hatcher content part 4

what are some of the discrete and extended 2D and 3D structures?

2D - dicrete - molecular boxes - extended - self assembled surfaces, molecular grids

3D - discrete - helicates, coordination cages, coordination nanotubes - extended - MOFs, COFs, HOFs

what is reticular chemistry?

the chemistry of linking molecular building blocks by strong bonds to make crystalline open frameworks

made up of nodes and linkers

nodes = units of defined geometry that form the framework vertices

linkers = bridging unit (typically organic molecule) between nodes to create the extended framework

come together bybself assembly

what are metal organic frameworks?

MOFs are organic-inorganic crystalline structures consisting of metal ions and organic linker molecules

example of reticular chemistry

first noticed in 1965 as waste material from other reactions

first mof reported by omar yaghi in 1995

what are nodes?

inorganic

typically metal ions or metal clusters

defined coordination geometry controls framework formed

geometry determined by number and direction of binding positions

what are linkers?

organic

often linear, rod like dicarboxylic acids

form strong dative covalent bonds to metal nodes

what are secondary building units?

SBU are mof subunits such as metal oxide clusters

what are the IUPAC definitions of a coordination polymer and a metal organic framework?

coordination polymer = a coordination compound with repeating coordination entities extending in 1,2 or 3 dimensions

MOFs = a coordination network with organic ligands containing potential voids

what is topology?

described the overall network structure in terms of the number of vertices, edges, and connectivity ofnthe mof building blocks

what are the key physical properties of mofs?

high thermal and chemical stability

insoluble

high chemical and structural tunability

high porosity

high internal surface area

what is the isoreticular series?

series of mofs formed from the same nodes/SBUs with progressively longer linkers

all mofs in the series have the same topology

increasing pore size from micro to mesoporous

not all linkers make porous mofs as some make interpenetrated networks