Thermal degradation of formamidinium based lead halide perovskites into sym-triazine and hydrogen cyanide observed by coupled thermogravimetry-mass spectrometry analysis

2019 ◽  
Vol 7 (28) ◽  
pp. 16912-16919 ◽  
Author(s):  
Emilio J. Juarez-Perez ◽  
Luis K. Ono ◽  
Yabing Qi
Keyword(s):  
Mass Spectrometry ◽  
Thermal Stability ◽  
Hydrogen Cyanide ◽  
Organic Cation ◽  
Perovskite Solar Cell ◽  
Mass Spectrometry Analysis ◽  
Decomposition Products ◽  
Spectrometry Analysis ◽  
Halide Perovskites ◽  
Lead Halide

The thermal stability and decomposition products of formamidinium, a widely used organic cation in perovskite solar cell formulation, were investigated.

Quantitative In Situ Mass Spectrometry Analysis of Mannitol Decomposition Products under Hydrothermal Conditions

2017 ◽  
Vol 31 (10) ◽  
pp. 10866-10873
Author(s):  
Pattasuda Duangkaew ◽  
Shuhei Inoue ◽  
Tsunehiro Aki ◽  
Yutaka Nakashimada ◽  
Yoshiko Okamura ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectrometry Analysis ◽  
Hydrothermal Conditions ◽  
Decomposition Products ◽  
Spectrometry Analysis

A study on the effects of mixed organic cations on the structure and properties in lead halide perovskites

2020 ◽  
Vol 22 (5) ◽  
pp. 3105-3111 ◽  
Author(s):  
Chao Wu ◽  
Daoyou Guo ◽  
Peigang Li ◽  
Shunli Wang ◽  
Aiping Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Single Crystals ◽  
Electrical Transport ◽  
Organic Cation ◽  
Organic Cations ◽  
Structure And Properties ◽  
Electrical Transport Properties ◽  
Halide Perovskites ◽  
A Site ◽  
Lead Halide

Four types of organic cation-mixed single crystals were successfully synthesized by partially substituting A site cations to investigate the effect of organic cations on structure, optical features, thermal stability, and electrical transport properties.

scholarly journals Chemical derivatization of pharmaceutical samples prior to Gas-Chromatography and Mass-Spectrometry analysis

2016 ◽  
Vol 11 (4) ◽  
pp. 852 ◽  
Author(s):  
Vivek K. Bajpai ◽  
Na-Hyung Kim ◽  
Kangmin Kim
Keyword(s):  
Mass Spectrometry ◽  
Thermal Stability ◽  
Gas Chromatography ◽  
Analytical Method ◽  
Mass Spectrometry Analysis ◽  
Chemical Derivatization ◽  
Pharmaceutical Samples ◽  
Spectrometry Analysis ◽  
Peak Areas ◽  
Visual Demonstration

<p>Derivatization is the process by which a compound is chemically changed, that has properties more amenable to a particular analytical method. Some samples analyzed by Gas-chromatography and Mass-spectrometry (GC-MS) require derivatization in order to make them suitable for analysis. Especially the compounds that have poor volatility, poor thermal stability, or that can be adsorbed in the injector will exhibit non-reproducible peak areas, heights, and shapes. Hence, this study focused on step-by-step visual demonstration of chemical derivatization of pharmaceutical samples prior to GC-MS analysis for their better elution and detection.</p>

scholarly journals Mass Spectrometry Analysis of NMC622/Graphite Li-Ion Cells Electrolyte Degradation Products after Storage and Cycling

2021 ◽  
Author(s):  
Rigaud Sébastien ◽  
Ana Cristina Martinez Maciel ◽  
Tristan Lombard ◽  
Sylvie Grugeon ◽  
Pierre Tran-Van ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Degradation Products ◽  
Principal Component ◽  
Mass Spectrometry Data ◽  
Mass Spectrometry Analysis ◽  
Statistical Tool ◽  
Decomposition Products ◽  
Spectrometry Analysis ◽  
Li Ion ◽  
Triton X

Abstract With the aim of establishing a data simultaneous comparison, the Principal Component Analysis (PCA) statistical tool was applied to LiNi0.6Mn0.2Co0.2O2/graphite Li-ion cells electrolyte’s decomposition products detected by UHPLC-ESI-HRMS. Herein, we illustrate how the chemometric tool associated with mass spectrometry data can be relevant to provide information about the presence of unusual molecules. Indeed, pristine Triton X-100 surfactant molecules used in electrode elaboration process were detected after impregnation stage. However, as they chemically react and oxidize at a potential lower than 4.5V vs. Li/Li+, only surfactant derivatives and classical ageing molecules were observed, respectively, after storage and cycling stages at 55°C, leading to a triangle-type correlation circle. On the other hand, global schemes of LiPF6-based electrolyte degradation pathways were elaborated from a comparative study with literature to help interpret results in future electrolyte ageing studies.

scholarly journals Effect of Ocular Hypertension on D-β-Aspartic Acid-Containing Proteins in the Retinas of Rats

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Takashi Kanamoto ◽  
Takashi Tachibana ◽  
Yasushi Kitaoka ◽  
Toshio Hisatomi ◽  
Yasuhiro Ikeda ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Ocular Hypertension ◽  
Aspartic Acid ◽  
Atp Synthase ◽  
Wistar Rats ◽  
Protein Band ◽  
Mass Spectrometry Analysis ◽  
Liquid Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Sds Page

Purpose. To investigate the effect of ocular hypertension-induced isomerization of aspartic acid in retinal proteins. Methods. Adult Wistar rats with ocular hypertension were used as an experimental model. D-β-aspartic acid-containing proteins were isolated by SDS-PAGE and western blot with an anti-D-β-aspartic acid antibody and identified by liquid chromatography-mass spectrometry analysis. The concentration of ATP was measured by ELISA. Results. D-β-aspartic acid was expressed in a protein band at around 44.5 kDa at much higher quantities in the retinas of rats with ocular hypertension than in those of normotensive rats. The 44.5 kDa protein band was mainly composed of α-enolase, S-arrestin, and ATP synthase subunits α and β, in both the ocular hypertensive and normotensive retinas. Moreover, increasing intraocular pressure was correlated with increasing ATP concentrations in the retinas of rats. Conclusion. Ocular hypertension affected the expression of proteins containing D-β-aspartic acid, including ATP synthase subunits, and up-regulation of ATP in the retinas of rats.

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