In 2022,Kandhasamy, Mohanraj; Shanmugam, Ganesan; Selvaraj, Balamurugan; Kamaraj, Santhosh; Gunasekeran, Ahalya; Sambandam, Anandan published an article in Optical Materials (Amsterdam, Netherlands). The title of the article was 《A locust bean and pectin polymer blend integrated with thio-bridged pyridinyl additive as a novel cobalt and copper gel electrolyte system for dye-sensitized solar cells》.Quality Control of 2-Bromo-5-methylpyridine The author mentioned the following in the article:
An intensive correlation has been attempted on 2-(pyridin-2-yl)-1-(4-(trifluoromethyl)phenyl)-1H-benzo[d]imidazole ligand-coordinated cobalt and copper metal complex electrolytes (Co2+/3+[ptpbi]3 and Cu1+/2+[ptpbi]2) with blend biopolymer electrolyte based on Locust Bean Gum and Pectin (LP) as a host matrix to enhance the performance of organic DPTCY sensitizer (2D-π-D′-A-π-A). Comparatively, the ligand coupled bulky CF3 acceptor on the para position of benzyl moiety-substituted 2-(pyridin-2-yl)-benzimidazole (on the N-H position) [ptpbi]-coordinated copper metal complex shows a higher redox potential (0.62 V vs NHE) compare to Co2+/3+ redox system. The photovoltaic performance of thio-bridged pyridinyl based organic compounds (MPP and DSP) with/without highly electron-donating substituents (Me group) as an additive in QSSE host for dye-sensitized solar cell applications has been employed. A thorough investigation has been made for blending polysaccharide polymer-based electrolytes E1 to E4 through DSC, FTIR, UV-Vis spectroscopic techniques. The anal. of assembled device as [TiO2/DPTCY Dye/Mn+/m + redox/additive/LP blend biopolymer/Pt] has achieved a maximum PCE of 5.97% under 1 sun (100 mW cm-2) condition with 1.5AM. These results signify a record for copper complex with methyl-substituted thio-bridged pyridinyl (MPP) with higher efficiency. These devices had shown a higher chem. capacitance (6.06 x 10-6 F), recombination resistance (25.5 Ω), charge transfer resistance (5.67 Ω), ionic conductivity (1.568 (S cm-1) x 10-3), electron lifetime (48.97 ms), diffusion coefficient (2.63 x 10-7 cm-2 s), dielec. constant (2.76 x 102) and dielec. loss (4.41 x 103) compared with other substitution-based additives. These additives have trapped the diffusion of Cu2+ and Co3+ ion species has resulted in the constraint resistance and enhancement of the catalytic effect of the counter electrode. The higher charge relaxation time and a neg. shift in the Quasi-Fermi level of TiO2 arise by correlating photocurrent and photovoltage in suppression of recombination reaction. In the experiment, the researchers used many compounds, for example, 2-Bromo-5-methylpyridine(cas: 3510-66-5Quality Control of 2-Bromo-5-methylpyridine)
2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.Quality Control of 2-Bromo-5-methylpyridine