Study Of Synthesis Of New Type Carbon Quantum Dots And Its Application To Construct White Light Luminescent Materials

In this thesis,using glycine or imidazole as the source of carbon dots（CDs）,two new kinds of CDs-Gly and CDs-Imidazole were obtained by the bottom-up approach,respectively.And based on the nano-characteristic structure characterization by FT-IR,NMR,TEM and PXRD et al and the examination of UV-Visible absorption and photoluminescence,their photophysical properties were checked.In the meantime,based on the color-tuning,CDs-Gly-grafted polymeric hybrid material and CDs-Imidazole with direct white-light were also obtained,respectively.Starting from CDs-Gly,4-vinylbenzyl chloride was used as surface modification agent by reacting with the amino-group of CDs-Gly in an alkaline environment to synthesize the polymerizable carbon dots PCDs-Gly.Meanwhile,through the self-assembly of theβ-diketonate ligand HTTA（HTTA=2-thenoyltrifluoroacetone）,the vinyl-functionalized ancillary ligand 4-VB-FBI（4-VB-FBI=1-（4-vinylbenzyl）-2-（furan-2-yl）-1H-benzo[d]imidazole）and Sm（NO₃）₃·6H₂O at a mole ratio of 3:1:1,the vinyl-containing complex monomer[Sm（TTA）3（4-VB-FBI）]was obtained.Moreover,using the PCDs-Gly and the complex monomer[Sm（TTA）3（4-VB-FBI）]as the polymerizable monomers,the PMMA-supported hybrid material Poly（MMA-co-（PCDs-Gly）-co-[Sm（TTA）3（4-VB-FBI）]）was obtained from their copolymerization with methyl methacrylate（MMA）in the presence of AIBN（azobisisobutyronitrile）.Furthermore,in dependence on the combination of the greenish blue-light from the grafted PCDs-Gly and the orange-light from the grafted complex monomer[Sm（TTA）3（4-VB-FBI）]within,the direct white-light was realized for the hybrid material Poly（MMA-co-（PCDs-Gly）-co-[Sm（TTA）3（4-VB-FBI）]）.With regard to CDs-Imidazole,the photophysical behavior effects of solvent（such as chloroform,THF or actone et al）and the exciting wavelength were examined,where direct white-light was also realized CDs-Imidazole in solution uponl_ex=365 nm.