Mesophase State of Amphoteric Surfactants of β-alanine Type and Their Temperature Dependence of 1H-NMR and IR Spectra

1982 ◽  
Vol 84 (1) ◽  
pp. 231-243 ◽  
Author(s):  
Toyotoshi Ueda ◽  
Hisao Hidaka ◽  
Hisashi Harada ◽  
Yasuhiro Ohkura ◽  
Akira Yamashita
Keyword(s):  
Ir Spectra ◽  
Temperature Dependence ◽  
1H Nmr ◽  
Amphoteric Surfactants

scholarly journals Temperature dependence of 1H NMR chemical shifts and diffusivity of confined ethylammonium nitrate ionic liquid

2020 ◽  
Vol 74 ◽  
pp. 84-89 ◽  
Author(s):  
Oleg I. Gnezdilov ◽  
Oleg N. Antzutkin ◽  
Rustam Gimatdinov ◽  
Andrei Filippov
Keyword(s):  
Ionic Liquid ◽  
Temperature Dependence ◽  
1H Nmr ◽  
Chemical Shifts ◽  
Nmr Chemical Shifts ◽  
Ethylammonium Nitrate

Two New Chalcone Glycoside Compounds from Viburnum lantana (Family Caprifoliaceae) and Antioxidant Activity of its Hydroalcoholic Extract

2019 ◽  
Vol 16 (2) ◽  
pp. 93-98
Author(s):  
Ali Shafaghat ◽  
Mohammad Shafaghatlonbar
Keyword(s):  
Antioxidant Activity ◽  
Ir Spectra ◽  
1H Nmr ◽  
13C Nmr ◽  
Natural Antioxidants ◽  
2D Nmr ◽  
Antioxidant Property ◽  
Hydroalcoholic Extract ◽  
First Time

In the present study, two novel chalcone glycosides, trans-3-ethoxy-4-O-(glucopyranoside) -2', 3', 4', 5', 6' -pentahydroxy chalcone (compound 1) and trans-3-methoxy-4-O-(glucopyranoside) -2', 3', 4', 5', 6' -pentahydroxy chalcone (compound 2) have been isolated from the leaves of Viburnum lantana L. The structures were elucidated by using 1H-NMR, 13C-NMR, 2D-NMR such as HMQC, HMBC and NOE experiments and UV-Vis, MS and IR spectra. The antioxidant property of hydroalcoholic extract was evaluated by DPPH style. The results revealed that the leave extract possesses significant antioxidant activity (IC50 = 52 µg/mL). This study indicates that hydroalcoholic extract of the leaves from this species is an important source of chalcone and flavonoid derivatives, as well as of useful natural antioxidants. These chalcone glycoside compounds were isolated for the first time from V. lantana leaves.

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