نتایج جستجو برای: oxidation reduction

تعداد نتایج: 578942  

Journal: :Analytical chemistry 2009
Denis Menshykau Aoife M O'Mahony F Javier del Campo Francesc Xavier Munõz Richard G Compton

The fabrication, characterization, and use of arrays of ring-recessed disk microelectrodes are reported. These devices are operated in generator-collector mode with a disk acting as the generator and the ring as the collector. We report experiments and simulations relating to time-of-flight experiments in which material electrogenerated at a disk is diffusionally transported to the ring. Analys...

Journal: :Journal of the American Chemical Society 2014
Chuyang Cheng Paul R McGonigal Wei-Guang Liu Hao Li Nicolaas A Vermeulen Chenfeng Ke Marco Frasconi Charlotte L Stern William A Goddard J Fraser Stoddart

A challenge in contemporary chemistry is the realization of artificial molecular machines that can perform work in solution on their environments. Here, we report on the design and production of a supramolecular flashing energy ratchet capable of processing chemical fuel generated by redox changes to drive a ring in one direction relative to a dumbbell toward an energetically uphill state. The ...

2013
Yong-Qing Qiu Wen-Yong Wang Na-Na Ma Cun-Huan Wang Meng-Ying Zhang Hai-Yan Zou Peng-Jun Liu

The polycyclic p-quinodimethanes are proposed to be the novel candidates of the high-performance nonlinear optical (NLO) materials because of their large third order polarizabilities (γ). We investigate the switchable NLO responses of a series of polycyclic p-quinodimethanes with redox properties by employing the density functional theory (DFT). The polycyclic p-quinodimethanes are forecasted t...

Journal: :Science 1999
Chen Reed Rawlett Tour

A molecule containing a nitroamine redox center (2'-amino-4-ethynylphenyl-4'-ethynylphenyl-5'-nitro-1-benzenethiol) was used in the active self-assembled monolayer in an electronic device. Current-voltage measurements of the device exhibited negative differential resistance and an on-off peak-to-valley ratio in excess of 1000:1.

Journal: :Journal of the American Chemical Society 2010
Zoë R Turner Ronan Bellabarba Robert P Tooze Polly L Arnold

Silyl, phosphinyl, stannyl, and boryl reagents can be added across the neutral metal-carbon dative bond in d(0) f-block metal N-heterocyclic carbene complexes in a reversible manner, allowing additional functional groups to be incorporated into redox-inactive organo-f-block compounds.

Journal: :Chemical communications 2011
Shoko Kume Hiroshi Nishihara

The dynamic bistable rotational behaviour of a copper(I) coordination environment can be rationally tuned with balancing the substituent size on the rotor. Such rotors are sensitive to weak interactions, and the rotation was driven by a redox reaction on a ferrocenyl moiety via reconstruction of the charge interaction between redox centres.

Journal: :Science 2015
Kaixiang Lin Qing Chen Michael R Gerhardt Liuchuan Tong Sang Bok Kim Louise Eisenach Alvaro W Valle David Hardee Roy G Gordon Michael J Aziz Michael P Marshak

Storage of photovoltaic and wind electricity in batteries could solve the mismatch problem between the intermittent supply of these renewable resources and variable demand. Flow batteries permit more economical long-duration discharge than solid-electrode batteries by using liquid electrolytes stored outside of the battery. We report an alkaline flow battery based on redox-active organic molecu...

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