Synthesis and structural studies (1H,13C,31P NMR and X-ray) of new C-bonded cyclotriphosphazenes with heterocyclic substituents from novel phosphinic acid derivatives
Synthesis and structural studies (<sup>1</sup>H,<sup>13</sup>C,<sup>31</sup>P NMR and X-ray) of new C-bonded cyclotriphosphazenes with heterocyclic substituents from novel phosphinic acid derivatives
作者:Virginie Vicente、Alain Fruchier、Marc Taillefer、Corinne Combes-Chamalet、Ian J. Scowen、Françoise Plénat、Henri-Jean Cristau
DOI:10.1039/b311046j
日期:——
Three new C-bonded cyclotriphosphazenes, [N3P3(2-thienyl)6], 2, [N3P3(3-thienyl)6], 4, and [N3P3(3,3′-bithienyl-2,2′-ylene)3], 6, have been prepared by two new synthetic procedures and are the first examples of non-spiro and trispirocyclotriphosphazene derivatives composed of thiophene and 3,3′-dithiophene substituents, respectively. Their 1H, 13C and 31P NMR parameters are given. The solid state structures of 2, 4 and 6 have been determined by X-ray crystallography.
An oligothiophene bearing 1-hydroxy-1-oxodithieno[2,3-b:3′,2′-d]phosphole (TP) as a novel anchoring group has been synthesized for dye-sensitized solar cells (DSSC). Attenuated total reflectance-Fourier transform infrared and X-ray photoelectron spectroscopy measurements disclosed the bidentate binding of the phosphinic acid unit to a TiO2 surface. A TP-sensitized TiO2 cell yielded a maximum incident photon-to-current efficiency of 66% and a power conversion efficiency of 1.8%, indicating that 1-hydroxy-1-oxodithienophosphole is a potential unit as a new type of anchoring groups for DSSC.