ABSTRACT
The design and synthesis of a new porous organic polymer (POP) incorporated with cobalt carbonyl complexes through built-in bipyridinic coordination sites for hydrogen storage are described. A thermal activation process was developed to remove the ligated carbonyl and carbon dioxide in order to expose the cobalt atomically inside of porous structure. Various spectroscopic and physical characterization techniques were used to study the coordinated Co sites and the POP's surface property. Upon thermal activation, this new cobalt-containing POP showed improved hydrogen uptake capacity and isosteric heat of adsorption.
Subject(s)
Cobalt/chemistry , Hydrogen/chemistry , Polymers/chemistry , Adsorption , Carbon Dioxide/chemistry , Fluorenes/chemistry , Polymerization , Polymers/chemical synthesis , Porosity , Pyridines/chemistry , ThermodynamicsABSTRACT
A series of highly porous polymers with similar BET surface areas of higher than 1000 m(2) g(-1) but tunable pore ranging from 0.7 nm to 0.9 nm were synthesized through facile ethynyl trimerization reaction to demonstrate the surface property-hydrogen adsorption relationship.
Subject(s)
Hydrogen/chemistry , Polymers/chemistry , Adsorption , Molecular Structure , Particle Size , Porosity , Surface PropertiesABSTRACT
This communication reports an asymmetric charge transport with a large rectification ratio and finely featured NDR (negative differential resistance) by d-orbitals of a neutral ruthenium(ii) complex with a C(2) axis of symmetry.
