57666-62-3Relevant academic research and scientific papers
A co-sensitized approach to efficiently fill the absorption valley, avoid dye aggregation and reduce the charge recombination
Luo, Junsheng,Wan, Zhongquan,Jia, Chunyang,Wang, Yan,Wu, Xiaochun
, p. 506 - 514 (2016)
Compared with the development of novel organic dyes, co-sensitization is a much more convenient way to achieve highly efficient dye-sensitized solar cells (DSSCs). Here, two simple donor-(π conjugated spacer)-acceptor dyes, in which hexyloxy-substituted phenyl as an electron donor, cyanoacrylic acid as the electron acceptor and different spacers thiophene (LD03) or furan (LD04) as the π-linkers, were designed and synthesized as co-sensitizers for N719-based DSSCs. The photophysical, electrochemical, photovoltaic performances and electrochemical impedance spectroscopy of these DSSCs were investigated in detail. When compared to the DSSCs fabricated from individual N719, the co-sensitized DSSCs (N719?+?LD03 and N719?+?LD04) showed significantly enhanced power conversion efficiencies (PCEs), short-circuit photocurrent density (Jsc) and open circuit voltage (Voc) simultaneously, which owing to the co-sensitizers could effectively overcome the competitive light absorption by I3? in the electrolyte, avoid dye aggregation and reduce the charge recombination. Consequently, the co-sensitized DSSC (N719?+?LD04) gave the highest PCE of 8.955% (Jsc?=?17.628?mA?cm?2,?Voc?=?0.758?V and fill factor?=?0.670), exhibiting an improvement of 13.412% compared to the device sensitized with N719 alone (PCE?=?7.896%) under illumination (AM 1.5G, 100?mW?cm?2).
5-Phenyl-2-furamidines: A new chemical class of potential antidepressants
Pong,Pelosi Jr.,Wessels,Yu,Burns,White,Anthony Jr.,Ellis,Wright,White Jr.
, p. 1411 - 1416 (2007/10/02)
A series of 5-phenyl-2-furamidines has been synthesized and evaluated for antidepressant activities. Substitution in the phenyl ring with a nitro (4) or an amino (12) group in the ortho-position resulted in an increase in antidepressant activity. Both 4 and 12 antagonized tetrabenazine-induced ptosis in rodents and inhibited norepinephrine (noradrenaline) uptake into crude synaptosomes of whole mouse brain at doses or concentrations comparable to those of the tricyclic antidepressants. However, these compounds did not possess the anticholinergic and antihistaminic activities common to tricyclic antidepressants. In addition, they lacked monoamine oxidase inhibitory activity. The 5-phenyl-2-furamidines represent a new chemical class of antidepressants and may be useful for depressive patients who cannot tolerate the compromising side effects of the tricyclic antidepressants and monoamine oxidase inhibitors.
