Functionalization of reduced graphene oxide with axially-coordinated metal-porphyrins: facile syntheses and temporally-dependent nonlinear optical properties. Issue 2 (16th December 2015)

• Record Type: Journal Article
• Authors: Wang, Aijian; Song, Jingbao; Jia, Ding; Yu, Wang; Long, Lingliang; Song, Yinglin; Cifuentes, Marie P.; Humphrey, Mark G.; Zhang, Long; Shao, Jianda; Zhang, Chi
• Is Part Of: Inorganic chemistry frontiers. Volume 3:Issue 2(2016)
• Page Start: 296
• Page End: 305
• Publication Date: 2015-12-16
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5qi00209e
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : Reduced graphene oxide-tin porphyrin nanohybrids with good dispersibility have been prepared, which exhibited large optical nonlinearity due to a combination of mechanisms. Abstract : Reduced graphene oxide-tin porphyrin (RGO-SnTPP) nanohybrids with good dispersibility have been prepared by two covalent functionalization approaches. The microscopic structure and morphology of the RGO-SnTPP nanohybrids were characterized by various spectroscopic techniques including Fourier transform infrared spectroscopy, Raman spectroscopy, transmission electron microscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy. Ground-state absorption and steady-state fluorescence studies indicate considerable π–π interactions and effective photo-induced electron and/or energy transfer from the porphyrin moieties to the RGO. Their nonlinear optical properties were investigated using the Z -scan technique at 532 nm with both picosecond and nanosecond laser pulses. The RGO-SnTPP hybrids were found to exhibit large nonlinear optical responses due to a combination of mechanisms, while significant differences in their nonlinear optical responses were observed, highlighting the influence on photophysical properties of the degree of functionalization and the synthetic approach employed.