Rong Yuanyang, Large Matthew J, Tripathi Manoj, Ogilvie Sean P, Amorim Graf Aline, Mao Boyang, Tunesi Jacob, Salvage Jonathan P, King Alice A K, Pasquazi Alessia, Peccianti Marco, Malpass-Evans Richard, McKeown Neil B, Marken Frank, Dalton Alan B
School of Physics and Astronomy , University of Sussex , Brighton BN1 9RH , United Kingdom.
National Graphene Institute , University of Manchester , Booth Street East , Manchester M13 9PL , United Kingdom.
ACS Appl Mater Interfaces. 2019 Aug 28;11(34):31191-31199. doi: 10.1021/acsami.9b09832. Epub 2019 Aug 15.
Nanohybrid materials based on nanoparticles of the intrinsically microporous polymer PIM-1 and graphene oxide (GO) are prepared from aqueous dispersions with a reprecipitation method, resulting in the surface of the GO sheets being decorated with nanoparticles of PIM-1. The significant blueshift in fluorescence signals for the GO/PIM-1 nanohybrids indicates modification of the optoelectronic properties of the PIM-1 in the presence of the GO due to their strong interactions. The stiffening in the Raman G peak of GO (by nearly 6 cm) further indicates p-doping of the GO in the presence of PIM. Kelvin probe force microscopy (KPFM) and electrochemical reduction measurements of the nanohybrids provide direct evidence for charge transfer between the PIM-1 nanoparticles and the GO nanosheets. These observations will be of importance for future applications of GO-PIM-1 nanohybrids as substrates and promoters in catalysis and sensing.
基于固有微孔聚合物PIM-1纳米颗粒和氧化石墨烯（GO）的纳米杂化材料通过再沉淀法从水分散体制备而成，使得GO片层的表面被PIM-1纳米颗粒修饰。GO/PIM-1纳米杂化物荧光信号的显著蓝移表明，由于PIM-1与GO之间的强相互作用，PIM-1的光电性能在GO存在的情况下发生了改变。GO的拉曼G峰变硬（近6 cm）进一步表明在PIM存在下GO发生了p型掺杂。纳米杂化物的开尔文探针力显微镜（KPFM）和电化学还原测量为PIM-1纳米颗粒与GO纳米片之间的电荷转移提供了直接证据。这些观察结果对于GO-PIM-1纳米杂化物未来作为催化和传感中的底物和促进剂的应用具有重要意义。
