Artificial molecular switches and machines that enable the directional movements of molecular components by external stimuli have undergone rapid advances over the past several decades. Particularly, overcrowded alkene-based artificial molecular motors are highly attractive from the viewpoint of chirality switching during rotational steps. However, the integration of these molecular switches into solid-state devices is still challenging. Herein, we present an example of a solid-state spin-filtering device that can switch the spin polarization direction by light irradiation or thermal treatment. This device utilizes the chirality inversion of molecular motors as a light-driven reconfigurable spin filter owing to the chiral-induced spin selectivity effect. Through this device, we found that the flexibility at the molecular scale is essential for the electrodes in solid-state devices using molecular machines. The present results are beneficial to the development of solid-state functionalities emerging from nanosized motions of molecular switches.
We report the synthetic route of two ruthenium dye-sensitizers; namely, Ru(4,4-dicarboxylic-2,2-bipyridine)(1,10-phenanthroline)(NCS)2 (6) and Ru(4,4-dicarboxylic-2,2-bipyridine)(1,10-phenanthroline-5-carboxylic acid)(NCS)2 (7), which both complexes were characterized by 1H NMR, 13C NMR and UV-Vis spectroscopic techniques.
Iridium complexes are particularly essential and have been intensively utilized as emissive phosphorescence emitters for efficient phosphorescent electroluminescent (EL) devices. In order to improve the EL performance, a series of...
We present the synthesis and characterization of a commercial standard ruthenium dye namely, N3, by cheap and easily prepared starting materials from three synthetic routes: the Grätzel's protocol and the other two new methods designed in our laboratory, i.e., the one-pot reaction and via the reaction of cymeme complex.
Two ruthenium complexes (5 and 6) with bipyridinedipyridophenazine ancillary ligands have been synthesized in an attempt to increase the π-conjugated system as well as to increase the optical extinction coefficient. Structural characterization was determined by proton NMR spectra. The photophysical and electro chemical were studied by UV-Vis and cyclic voltrammetry, respectively. The DSSCs fabrications of both ruthenium dyes were studied under 1.5 AM standard irradiation (100 mWcm2) and reported in the factor of solar-light-to-electricity conversion efficiency, a short-circuit current density, an open-circuit photovoltage, and a fill factor (compared with N3 dye).
Dye-sensitized Solar Cells (DSCs) Have Received Widespread Attention Owing to their Low Cost, Easy Fabrication, and Relatively High Solar-to-electricity Conversion Efficiency. Based on the Tio2 Electrode, Ruthenium Complex Dye, Liquid Electrolyte, and Pt Counter Electrode, Dscs Have Already Exhibited an Efficiency above 11% and Offer an Appealing Alternative to Conventional Solar Cells. however, until now the Commercial and Well Known Standard Dye Is the Ruthenium Complex, Namely, Cis-bis(isothiocyanato)-bis(2,2'-bipyridyl-4,4'dicarboxylato)ruthenium(II) (N3) which Has Been Widely Used around the Word. in this Article, N3 Standard Dye Was Synthesized and Characterized by Two Synthetic Routes: Grätzel’s Protocol and a One-pot Reaction from Cheap and Easily Prepared Starting Materials.
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