文献类型：期刊文献

英文题名：Synthesis and strong optical limiting response of graphite oxide covalently functionalized with gallium phthalocyanine

作者：Li, Yong-Xi[1];Zhu, Jinhui[1];Chen, Yu[1];Zhang, Jinjuan[1];Wang, Jun[2,3,4];Zhang, Bin[1];He, Ying[5];Blau, Werner J.[3,4]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Inst Appl Chem, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Mat High Power Laser, Shanghai 201800, Peoples R China;[3]Univ Dublin Trinity Coll, Mat Ireland Polymer Res Ctr, Sch Phys, Dublin 2, Ireland;[4]Univ Dublin Trinity Coll, CRANN, Dublin 2, Ireland;[5]E China Univ Sci & Technol, Ctr Mat Res & Anal, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：22

期号：20

外文期刊名：NANOTECHNOLOGY

收录：;EI(收录号：20111413894162);WOS:【SCI-EXPANDED(收录号:WOS:000288858400016)】；

基金：The authors are grateful for the financial support of the National Natural Science Foundation of China (20676034 and 20876046), the Ministry of Education of China (309013), the Fundamental Research Funds for the Central Universities, the Shanghai Municipal Educational Commission for the Shuguang Fellowship (08GG10) and the Shanghai Eastern Scholarship.

语种：英文

外文关键词：Hybrid materials - Nonlinear optics - Photons - Gallium compounds - Potash - X ray photoelectron spectroscopy - Light absorption - Two photon processes - Graphene oxide - Gallium

摘要：A soluble graphite oxide ( GO) axially substituted gallium phthalocyanine (PcGa) hybrid material (GO-PcGa) was for the first time synthesized by the reaction of tBu(4)PcGaCl with GO in anhydrous DMSO at 110 degrees C in the presence of K2CO3. The formation of a Ga-O bond between PcGa and GO has been confirmed by x-ray photoelectron spectroscopy. In contrast to GO, the D and G bands of GO-PcGa in the Raman spectrum are shifted to the lower wavenumbers by Delta nu = 11 and 18 cm(-1), respectively. At the same level of concentration of 0.1 g l(-1), GO-PcGa exhibit much larger nonlinear optical extinction coefficients and strong optical limiting performance than GO, tBu(4)PcGaCl and C-60 at both 532 and 1064 nm, implying a remarkable accumulation effect as a result of the covalent link between GO and PcGa. GO-PcGa possesses three main mechanisms for the nonlinear optical response-nonlinear light scattering, two-photon absorption and reverse saturable absorption for the 532 nm pulses and nonlinear light scattering for the 1064 nm pulses. tBu(4)PcGaCl does not make any significant contribution to the optical limiting at 1064 nm, while GO-PcGa has a much greater optical limiting response than GO at this wavelength, this suggesting that the PcGa moiety could certainly play an unknown but important role in the GO-PcGa material system.