A novel porphyrin dye extended at one meso-position via an pyridinylethynyl group acting as anchoring group and three phenyl -COOMe groups was synthesized and used as sensitizer for the fabrication of dye sensitized solar cells (DSSCs). The overall power conversion efficiencies (PCE) of DSSCs based on this porphyrin dye as sensitizer with and without CDCA coadsorbant are 3.36% and 4.56%, respectively. To improve the PCE of DSSC, we have incorporated Ag nanoparticles into the nano-porous TiO2 photoanode i.e. FTO/TiO2/Ag-NPs and found a enhancement up to 5.66%. The improved photovoltaic performance of the DSSCs with modified photoanode is attributed to the (i) the increased light harvesting efficiency due to the plasmon enhanced optical absorption induced by Ag nanoparticles, (ii) reduced back recombination process at TiO2/dye/electrolyte interface, (iii) improved electron lifetime, and (iv) formation of Schottky barrier at TiO2/NPs-Ag. (c) 2012 Elsevier B.V. All rights reserved.
PYRIDYL DERIVATIVES AND THEIR USE AS MGLU5 RECEPTOR ANTAGONISTS
申请人:Eli Lilly & Company
公开号:EP1729771B1
公开(公告)日:2009-10-14
Copper-free palladium-catalyzed sonogashira-type coupling of aryl halides and 1-aryl-2-(trimethylsilyl)acetylenes
作者:Ulrik S. Sørensen、Esteban Pombo-Villar
DOI:10.1016/j.tet.2005.01.032
日期:2005.3
A one-pot procedure for the direct coupling of 1-aryl-2-trimethylsilylacetylenes with arylhalides to give diaryl acetylenes is reported. The procedure does not involve the use of copper(I) iodide. Improvement in reaction yields has been obtained by replacing conventional oil bath heating with the use of microwave dielectric heating.
Synthesis of <i>meso-</i>Extended Tetraarylporphyrins
作者:Christopher Richardson、Christopher A. Reed
DOI:10.1021/jo070191p
日期:2007.6.1
The synthesis of five new meso-tetraarylporphyrins having pyridine, pyrimidine, or nitrile groups extending tetragonally via alkynyl linkages from the para positions is described. The radial extension is nearly double that of common porphyrins such as tetra-p-pyridylporphyrin. Practical quantities can be produced by Pd-coupling protocols when traditional methods fail. Applications of these extended