Absorption spectra of solvated electrons and radicals observed in the pulse radiolysis of cis and trans isomers of methylcyclohexanols and cyclopentanol to cyclooctanol

1991 ◽  
Vol 95 (16) ◽  
pp. 6259-6264 ◽  
Author(s):  
Noboru Fujisaki ◽  
Pascal Comte ◽  
Pierre P. Infelta ◽  
Tino Gaeumann
Keyword(s):  
Absorption Spectra ◽  
Pulse Radiolysis ◽  
Trans Isomers ◽  
Solvated Electrons ◽  
Cis And Trans Isomers ◽  
Cis And Trans

Perfluorinated porphyrazines 1: Synthesis and UV-vis spectral study of perfluorinated octaphenylporphyrazine and its indium(III) complex, [MPA(F5Ph)8](M = 2H, InIII(OH))

2013 ◽  
Vol 17 (08n09) ◽  
pp. 905-912 ◽  
Author(s):  
Pavel A. Stuzhin ◽  
Maksim Yu. Goryachev ◽  
Svetlana S. Ivanova ◽  
Anna Nazarova ◽  
Igor Pimkov ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Electronic Absorption ◽  
Spectral Study ◽  
Electronic Absorption Spectra ◽  
Chloroform Solution ◽  
Free Base ◽  
Hypsochromic Shift ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Cis And Trans

Novel perfluorinated porphyrazine has been prepared as indium(III) complex of octa(pentafluorophenyl)porphyrazine by cyclotetramerization of 1,2-dicyano-1,2-bis(pentafluorophenyl)-ethylene (mixture of cis- and trans-isomers) with basic indium(III) acetate in a melt. The In III complex is stable in trifluoroacetic and sulfuric acids, but is easily demetalated with formation of the free-base in a chloroform solution containing HCl or slighly acidified with CF 3 COOH in the presence of tetraalkylammonium chloride as a catalyst. Perfluorination of octaphenylporphyrazine macrocycle leads to a hypsochromic shift of the Q-band maxima in the electronic absorption spectra, to drastic decrease of the basicity of meso-nitrogen atoms of porphyrazine macrocycle and to increase of the acidity of the internal NH -groups.

scholarly journals The Metabolism of 14C-Labeled cis and trans Isomers of Octadecenoic and Octadecadienoic Acids

1964 ◽  
Vol 239 (8) ◽  
pp. 2482-2488
Author(s):  
Katsuto Ono ◽  
Donald S. Fredrickson
Keyword(s):  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Cis And Trans ◽  
Octadecadienoic Acids

Cis and trans isomers of 1-(5-bromothiophen-2-yl)-3-(10-chloroanthracen-9-yl)prop-2-en-1-one: Synthesis and characterization

2021 ◽  
Vol 1236 ◽  
pp. 130228
Author(s):  
P. Naresh ◽  
B. Pramodh ◽  
S. Naveen ◽  
S. Ganguly ◽  
J. Panda ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Cis And Trans

scholarly journals Identification of Anthocyanin Compounds in Butterfly Pea Flowers (Clitoria ternatea L.) by Ultra Performance Liquid Chromatography/Ultraviolet Coupled to Mass Spectrometry

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4539
Author(s):  
Nguyen Minh Thuy ◽  
Vo Minh ◽  
Tran Ben ◽  
My Tuyen Thi Nguyen ◽  
Ho Ha ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Ultra Performance Liquid Chromatography ◽  
Negative Ion ◽  
Trans Isomers ◽  
Clitoria Ternatea ◽  
Flower Extract ◽  
Cis And Trans Isomers ◽  
Butterfly Pea ◽  
Cis And Trans

Butterfly pea flower have great sensory attraction, but they have not yet been used widely in Vietnam. Extracts of butterfly pea flowers can be used conveniently as a natural blue colorant for food products. In this study, the identification of anthocyanin compounds in butterfly pea flowers was performed by UPLC coupled with a UV and Mass spectrometer instrument. Positive and negative ion electrospray MS/MS chromatograms and spectra of the anthocyanin compounds were determined. By analyzing the chromatograms and spectra for each ion, five anthocyanins were identified in the butterfly pea flower extract; these were delphinidin-3-(6”‐p-coumaroyl)-rutinoside, cyanidin 3-(6”-p-coumaroyl)-rutinoside, delphinidin-3-(p-coumaroyl) glucose in both cis- and trans- isomers, cyanidin-3-(p-coumaroyl-glucoside) and delphinidin-3-pyranoside. Additionally, based on their intensity, it was determined that cyanidin-3-(p-coumaroyl-glucoside) was the most abundant anthocyanin, followed by cyanidin 3-(6”-p-coumaroyl)-rutinoside, delphinidin-3-(p-coumaroyl-glucoside), delphinidin-3-(6”-p-coumaroyl)-rutinoside and delphinidin-3-pyranoside. In this study, cyanidin derivatives were discovered in butterfly pea flower extract, where these compounds had not been detected in previous studies.

Unveiling the coexistence of cis- and trans-isomers in the hydrolysis of ZrO2: A coupled DFT and high-resolution photoelectron spectroscopy study

2020 ◽  
Vol 153 (24) ◽  
pp. 244308
Author(s):  
Ali Abou Taka ◽  
Mark C. Babin ◽  
Xianghai Sheng ◽  
Jessalyn A. DeVine ◽  
Daniel M. Neumark ◽  
...  
Keyword(s):  
High Resolution ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Study ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Cis And Trans ◽  
Hydrolysis Of

scholarly journals Separation of cis and trans Isomers of Polyproline by FAIMS Mass Spectrometry

2016 ◽  
Vol 27 (12) ◽  
pp. 2071-2074 ◽  
Author(s):  
Andrew J. Creese ◽  
Helen J. Cooper
Keyword(s):  
Mass Spectrometry ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Cis And Trans
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