Nanoparticle (NP) is the matter between molecule and bulk material. It has attracted much attention in catalysis, optoelectronics and biology due to its unique physical and chemical properties. Incorporation of these NPs into the polymer matrix is one of the best methods to display their special functions, which not only stabilize the NPs but also realize the functional assembly of NPs and polymers. However, reali- zation of this idea depends largely on the compatibility of NPs and polymers as well as the interaction between them. Therefore, many methods have been developed to prepare the composites of NPs and polymers in order to obtain the function ex- pected. In this review, we mainly focus on the combination of in situ method with other methods to synthesize different functional one-dimension, two-dimension as well as bulk composites, which has been recently developed by our group. The most striking character of our method is the excellent compatibility between NPs and polymers which ensures a homogeneous distribution of NPs in the polymer matrix. The existence of the polymer network makes the NPs more stable, and is significant for displaying their functions.
SUN HaiZhu & YANG Bai State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
Two-dimensional(2-D)layered metal-organic coordination(lead methacrylate(LDMA))networks have been prepared in aqueous solution under mild conditions and their structure determined by single crystal diffraction.As the ligand used in our experiments is easily polymerized,these metal-organic coordination layers are therefore employed as precursors to fabricate cross-linked polymer layered materials throughγ-irradiated polymerization.The stabilities of the samples are signifi cantly improved afterγ-irradiation.To our knowledge,this is the fi rst time that covalent bonded polymer layered structures have been fabricated without the assistance of added surfactant or template.Such layered polymer materials cannot only act as alternatives to layered inorganic materials in some caustic environments,but also allow the generation of PbS nanoparticles(NPs)without aggregation in the polymer matrix.By exposing the polymer layer to H2S gas at room temperature,uniform PbS nanoparticles with an average size of about 6 nm are generated in situ.In addition,the resulting PbS NPs exhibit near-infrared(NIR)luminescent properties,which suggests the composite materials may be useful as active optical elements at communication wavelengths from 1300 to 1550 nm.
Fang CuiJunhu ZhangTieyu CuiSen LiangBao LiQuan LinBai Yang
