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Ultrafast laser dynamics of metal organic frameworks/TiO_2 nano-arrays hybrid composites for energy conversion applications

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Journal of Energy Chemistry 2019年第2期28卷 88-94页

作者： Fatma M.Ismail Daniel O'Neil Tareq Youssef souad a.elfeky The National Institute of Laser Enhanced Sciences Cairo University Zewail City of Science and Technology Georgia Institute of Technology

Herein,we report the victorious synthesis of metal-organic frameworks(MOFs) on TiO_2 nanotubes(NTs)using a layer-by-layer(LbL) *** crystalline and homogenous thin films of MOFs were grown and characterized using XRD,SEM,FT-IR and UV/Vis ***,the utilization of the MOF films as sensitizers was probed in bespoke Graetzel type liquid junction solar *** constructed cell performance revealed an I_(sc) of 1.16 mA cm^(–2),Vocof 0.63 V,FF of 0.33,and E_(ff) of 0.42%.Further,pumpprobe transient laser spectroscopy was performed to investigate the energy and charge transfer dynamics of the MOFs/TiO_2 NTs *** results indicated 86% injection *** ultrafast pump-probe spectroscopy allows the investigation of this process and the differences between *** also showed that the relaxation of the MOF chromophores is in competition with electron injection in the Ti O2 *** this study provides a new insight into electron transfer from photoexcited metal-organic frameworks(MOFs) into titanium dioxide.

关键词： Ultrafast laser dynamics Metal-organic frameworks TiO2 nano-arrays Energy conversion Thin film

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A boronic acid-based fluorescent hydrogel for monosaccharide detection

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Frontiers of Chemical Science and Engineering 2020年第1期14卷 112-116页

作者： Suying Xu Adam C.Sedgwick souad a.elfeky Wenbo Chen Ashley S.Jones George T.Williams A.Toby A.Jenkins Steven D.Bull John S.Fossey Tony D.James Department of Biochemistry Faculty of ScienceBeijing University of Chemical TechnologyBeijing 100029China Department of Chemistry University of BathBath BA27AYUK Department of Chemistry University of Texas at AustinTX 78712-1224USA School of Chemistry University of BirminghamBirmingham B152TTUK National Institute of Laser Enhanced Sciences Cairo UniversityGiza 12613Egypt Higher Institute for Optics Technology SheratonCairo 17361Egypt Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric PowerShanghai 200090China

A boronic acid-based anthracene fluorescent probe was functionalised with an acrylamide unit to incorporate into a hydrogel system for monosaccharide *** solution,the fluorescent probe displayed a strong fluorescence turn-on response upon exposure to fructose,and an expected trend in apparent binding constants,as judged by a fluorescence response where D-fructose>D-galactose>D-mannose>*** hydrogel incorporating the boronic acid monomer demonstrated the ability to detect monosaccharides by fluorescence with the same overall trend as the monomer in solution with the addition of D-fructose resulting in a 10-fold enhancement(≤0.25 mol/L).

关键词： boron hydrogel monomer

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