- Introduction of carbonyl groups: An approach to enhance electrochemical performance of conjugated dicarboxylate for Li-ion batteries
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A rational functionalization of conjugated dicarboxylate is reported here to enhance the cyclability and rate capability for Li-ion batteries. Introduction of carbonyl groups between aromatic rings is explored as an alternative way to extend π-conjugation. For the proof of concept, 4,4′-bis(lithiooxycarbonyl)benzil (Li2-BZL) was synthesized and compared its lithium storage performance against lithium [1,1′-biphenyl]-4,4′-dicarboxylate (Li2-BPDC). The Li2-BZL electrode delivers a stable capacity of 165 mAh g?1 even after 50 cycles at current density of 50 mAh g?1 whereas, rapid capacity fading was observed in the case of Li2-BPDC. Density functional theory (DFT) studies confirmed that the carbonyl groups in the Li2-BZL to reduce the bandgap, thereby improving the elctrochemical lithium storage performance of Li2-BZL electrode in comparision to that of Li2-BPDC.
- Medabalmi, Veerababu,Ramanujam, Kothandaraman
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- Electrocatalytic Hydrogen Evolution from a Cobaloxime-Based Metal-Organic Framework Thin Film
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Molecular hydrogen evolution catalysts (HECs) are synthetically tunable and often exhibit high activity, but they are also hampered by stability concerns and practical limitations associated with their use in the homogeneous phase. Their incorporation as
- Roy, Souvik,Huang, Zhehao,Bhunia, Asamanjoy,Castner, Ashleigh,Gupta, Arvind K.,Zou, Xiaodong,Ott, Sascha
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- Isoreticular Linker Substitution in Conductive Metal–Organic Frameworks with Through-Space Transport Pathways
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The extension of reticular chemistry concepts to electrically conductive three-dimensional metal–organic frameworks (MOFs) has been challenging, particularly for cases in which strong interactions between electroactive linkers create the charge transport
- Campbell, Michael G.,Chmielewski, Micha? J.,Dinc?, Mircea,Kharod, Ruby A.,Liu, Hanyu,Park, Sarah S.,Xie, Lilia S.,Yang, Luming
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- Syntheses and characterization of several nickel bis(dithiolene) complexes with strong and broad Near-IR absorption
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Several nickel bis(dithiolene) complexes with strong and broad absorptions in the Near-IR (NIR) region (700-1100 nm) were synthesized by using green and simple synthetic routes. The physical and chemical properties of these dyes were systematically studied, including structure, optical spectroscopy and electrochemical behavior, etc. These NIR dyes were first applied to dye-sensitized solar cells (DSCs) and the photoelectrochemical performances were also investigated. The effects of different substituent groups on the properties of the dyes and photovoltaic performances of DSCs were discussed. Furthermore, we also applied the synthesized NIR dyes for constructing NIR absorbing filter. With their particular photoelectrochemical properties, the nickel bis(dithiolene) complexes exhibit promising prospects for future application.
- Miao, Qingqing,Gao, Junxiong,Wang, Zeqing,Yu, Hang,Luo, Yi,Ma, Tingli
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p. 619 - 627
(2011/11/01)
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- A New Site Selective Synthesis of Benzoin Esters. Synthesis of Symmetrically and Unsymmetrically Substituted Benzils
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A series of novel benzoin esters has been obtained in high yield, in a site selective synthesis, by the acid hydrolysis of a series of 4-benzoyloxy-2-azabuta-1,3-dienes.The oxidation of the benzoin esters allows the preparation of symmetrically and unsymmetrically substituted benzils by a route that is superior, in some cases, to those previously reported.
- Armesto, Diego,Horspool, William M.,Ortiz, Maria J.,Perez-Ossorio, Rafael
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p. 799 - 801
(2007/10/02)
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