scholarly journals Natural Dyes from Mortiño (Vaccinium floribundum) as Sensitizers in Solar Cells

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 785 ◽  
Author(s):  
Miguel A. Taco-Ugsha ◽  
Cristian P. Santacruz ◽  
Patricio J. Espinoza-Montero
Keyword(s):  
High Performance Liquid Chromatography ◽  
Solar Cells ◽  
Liquid Chromatography ◽  
Solar Cell ◽  
High Performance ◽  
Power Conversion ◽  
Natural Dyes ◽  
The Cost ◽  
Layer Chromatography

Photovoltaic energy presents environmental advantages; however, these advantages are limited by the cost of manufacturing solar cells and in many cases, scarce or dangerous materials are incorporated. Therefore, the use of natural dyes from mortiño (Vaccinium floribundum) as sensitizers in solar cells is proposed. The dyes were extracted by maceration in acidified methanol (HCl, citric acid and trifluoroacetic acid TFA) and were characterized by High-Performance Liquid Chromatography (HPLC), Thin-Layer Chromatography (TLC) and spectrometric methods (UV-Vis, IR and MS-MALDI). The construction and characterization of cells were in standard conditions. The study confirms that pigments in mortiño are flavonoids of the anthocyanidin group as: cyanidin-3-galactoside, and cyanidin-3-arabinoside. The efficiency of solar cells was between 0.18–0.26%; the extraction with TFA in methanol leads to the best performance. Although they have low power conversion efficiency, mortiño dyes could be an alternative to artificial sensitizers for solar cell technologies because they are harmless and abundant substances.

scholarly journals Isolation and Characterization of a Chemical from Tomato Apices that Stimulates Plant Growth

HortScience ◽  
1990 ◽  
Vol 25 (7) ◽  
pp. 769-771
Author(s):  
Yichun Wang ◽  
Violet Wert ◽  
Muraleedharan Nair ◽  
Stanley Ries
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Zea Mays ◽  
High Performance Liquid Chromatography ◽  
Oryza Sativa ◽  
Liquid Chromatography ◽  
High Performance ◽  
Water Extract ◽  
Isolation And Characterization ◽  
Layer Chromatography

A methanol: water extract of tomato (Lycopersion esculentum Mill.) apices increased the growth of the alga Chlamydomonas reinhardtii. The active substance from the dried shoot apices was purified by C18 flash column and high performance liquid chromatography. The purified extract enhanced the growth of tomato, corn (Zea mays L.), and rice (Oryza sativa L.) seedlings at concentrations less than 1.0 mg·liter-1. With Chlamydomonas, the purified extract increased cell division 111% at 0.1 mg·liter-1 and chlorophyll content 23% at 10 mg·liter-1 in 18 hours. Nuclear magnetic resonance and mass spectroscopy indicated that the purified fraction was a mixture of compounds having sugar moieties. Analysis by thin layer chromatography showed that the fraction was ninhydrin positive and more polar than the known plant hormones studied.

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