| Recently,coordination polymer micro-/nano-structures have attracted intensive interests in chemistry and materials science due to their wide application potentials in a variety of chemical research hot fields,such as gas adsorption,magnetism,optics,separation,catalysis and drug delivery.The size effects and specific morphology-dependent properties make coordination polymer nanostructures more attractive for the application in some specific fields compared with the metal organic framework compounds,which has been investigated over the past two decades.Compared to the field of MOFs,conventional MOFs are not suitable or ideal due to their static structures and bulk size.In this regard,a variety of biologically-relevant imaging,abeling,sensing and delivery systems have been envisioned.More significantly,CPPs are constructed from molecular basis,rather than atomic,in contrast with the noble metal nanoparticles and semiconductor quantum dots based on atoms.Therefore,we can prepare them to make CPPs extremely attractive for applications through the rational choice of ligands.In this thesis,coordination polymer micro-/nano-structures were synthesized directly under certain conditions by choosing appropriate ligands as organic building blocks.Furthermore,to extend the functionality of CPPs,we also prepared oxides directly or indirectly by using the obtained coordination polymer micro-/nano-structures as precursors or soft template,and studied the corresponding growth mechanism and related performances of the as-obtained samples.The main contents of this thesis are summarized as follows:1.Amorphously spheres-like coordination polymer architectures in submicro regimes have been synthesized from the hydrothermal reaction of transition metal ions and 3,5-bis(pyridin-3-ylmethylamino)benzoic acid.The size of the final coordination polymer was dependent on the concentrations of reactants.Scanning electron microscopy studies monitored at numerous stages of growth reveal that coordination-induced morphology changes from uncoordinated flowerlike ligands to sphere-like coordination polymer particles,and we proposed a possibly self-directed mechanism.Moreover,variations of luminescent and antibacterial profiles are associated with coordination environments or the size of as-obtained coordination polymer samples.In addition,the newly synthesized Cu-based polymer particles may act as novel metal-based anticancer drugs in the future because of their potent in vitro anticancer activities against three chosen cancer lines MCF-7,HeLa,andNCI-H446.2.A bifunctional organic ligand,4,4'-dicarboxy-2,2'-bipyridine(H2dcbp),has been documented for synthesizing crystalline Cu-CPPs and Zn-CPPs with different morphologies,as a function,which have effects on their luminescent properties and antibacterial activities.The additives such as Et3N and acetic acid play vital roles in the particle formation rate by means of manipulating the deprotonation rate of the organic ligand and thus the particle size and shape.To further investigate the detailed antibacterial properties,series of antibacterial tests are performed and shows that all tested crystalline Ag-based CPPs possess strong antibacterial properties to both gram-negative and gram-positive bacteria.The modified Kirby-Bauer tests illustrate that these Ag-based materials had better antibacterial effects against gram negative Escherichia coli than gram-positive Bacillus subtilis.3.Hierarchically micro-/nano-structured coordination polymer[Cu(2,5-PDC)H2O]n architectures with tunable morphologies have been successfully prepared by rationally adjusting the preparation parameters,such as the reactant concentration,solvent,surfactant and reaction temperature.Using the corresponding CPPs as soft template,several porous copper-based inorganic motifs can be obtained,which show potential applications in antibacterial field and lithium ions batteries.Therein,Cu0-1 can kill Gram positive bacteria B.subtilis and S.aureus better than other materials.The value for initial discharge capacity of CuO-3(1160 mAh g-1)is higher than theoretical capacity(674 mAh g-1)and most copper oxide materials.Besides,Cu/C composites also show intense application in antibacterial and Li-ions uptake-release field,which will provide a widely used method to prepare the nanosystem of carbon-coating or carbon-compositing materials by simple calcinations of shaped precursors CPPs used under proper temperature.4.Mn-based CPPs has been used as precursors to synthesize one-dimensional Mn3O4@C nanocomposite materials indirectly.Carbon-coated Mn3O4 nanowires(Mn3O4@C NWs)were reduced by well-shaped bixbyite networks with carbon coatings.To assess the properties of one dimensional carbon coating nanowires for use in supercapacitors,cyclic voltammetry and galvanostatic charging-discharging measurements were performed.Mn3O4@C NWs could be charged and discharged faster and had higher capacitance than commercial bare Mn3O4 nanostructures and the other reported ones.The capacitance of the Mn3O4@C NWs was 92%retained after 3000 cycles at a charging rate of 5 A/g.These improvements can be attributed to continuous carbon coating shells,which promote fast Faradaic charging and discharging of the interior Mn3O4 core and also protect the inner core as the barriers.The Mn3O4@C NWs could be a promising candidate material for a high-capacity,low-cost,and environmentally friendly electrode for supercapacitors in the future.In addition,the magnetic properties of as-synthesized samples were also documented to investigate the influence of carbon coating. |
PDF Full Text Request