光限幅性能增强的铂配合物功能化石墨烯杂化材料
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摘要
通过共价键和静电吸附方式分别制备了两种可溶性的氧化石墨烯-铂配合物杂化材料并经FT-IR、XPS、XRD、HRTEM、AFM、TGA、Raman光谱、紫外-可见吸收和荧光发射光谱对杂化材料的微观结构、形态及光物理性质进行了系统表征。Z-扫描与光限幅测试结果表明:与单一材料相比,铂配合物修饰的氧化石墨烯杂化材料可以有效地提高材料的光限幅性能,其原因归结为非线性散射、非线性吸收、以及从铂配合物到氧化石墨烯光诱导电子或能量转移的协同作用。
Two new graphene oxide(GO)-Pt complex hybrid materials were prepared by covalent functionalization and electrostatic adsorption.The microscopic structure,morphology,and photophysical properties of the resulting hybrid materials were characterized by FT-IR,XPS,XRD,HRTEM,AFM,TGA,Raman spectroscopic techniques, UV-Vis absorption and steady-state fluorescence.The nonlinear optical properties and optical limiting performance of GO,Pt complexes,and GO-Pt hybrid materials were investigated using Z-scan measurements at 532 nm with 4 ns laser pulses.The results show that the efficient functionalization of GO makes GO-Pt hybrid materials possess much better NLO properties and optical limiting performance than those of GO and Pt complexes alone,which was ascribed to a combination of nonlinear scattering,nonlinear absorption and photoinduced electron or energy transfer from the electron donor Pt complex moiety to the acceptor graphene oxide.
引文
1.Balapanuru,J.;Yang,J.X.;Xiao,S.;Bao,Q.L.;Jahan,M.;Polavarapu,L.;Wei,J.;Xu,Q.H.;Loh,K.P.Angew Chem.Int.Ed.2010,49:6549.
    2.Xu,Y.Z.;Liu,Z.B.;Zhang,X.L.;Wang,Y;Tian,J.G;Huang,Y;Ma,Y K;Zhang,X.Y;Chen,Y S.Adv.Mater.2009,21:1275.
    3.Liu,R.;Li,Y J.;Li,Y H.;Zhu,H.J.;Sun,W F.J.Phys.Chem.A 2010,114:12639.

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