Revelation of the chiral recognition of alanine and leucine in an l-phenylalanine-based metal–organic framework

2020 ◽  
Vol 56 (7) ◽  
pp. 1034-1037 ◽  
Author(s):  
Xue Ma ◽  
Yanhao Zhang ◽  
Yu Gao ◽  
Xinglin Li ◽  
Cuijie Wang ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chiral Recognition ◽  
Control Experiment ◽  
Metal Organic Framework ◽  
Mas Nmr ◽  
Recognition Mechanism ◽  
Chiral Recognition Mechanism ◽  
Metal Organic ◽  
And Control ◽  
Cp Mas Nmr

An l-phenylalanine-based Zn-MOF, namely [Zn2(l-Phe)2(bpe)2]n, was designed for experimentally revealing the chiral recognition mechanism to alanine and leucine by means of 13C CP MAS NMR spectroscopy, XPS and control experiment.

scholarly journals Elucidation of chiral Recognition mechanism of alpha-amino acids using ligand exchange high performance liquid chromatography

2007 ◽  
Vol 18 (7) ◽  
pp. 1367-1373 ◽  
Author(s):  
Jaqueline D. Senra ◽  
Luiz Fernando B. Malta ◽  
Patricia M. N. Ceva-Antunes ◽  
Rodrigo J. Corrêa ◽  
O. A. C. Antunes
Keyword(s):  
Amino Acids ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Ligand Exchange ◽  
High Performance ◽  
Chiral Recognition ◽  
Recognition Mechanism ◽  
Chiral Recognition Mechanism

Interaction of Gold with Co-Condensed and Grafted HMS-SH Silica: A 29Si {1H} CP-MAS NMR Spectroscopy, XRD, XPS and Au LIII EXAFS Study

2010 ◽  
Vol 2010 (23) ◽  
pp. 3628-3635 ◽  
Author(s):  
Valeria La Parola ◽  
Alessandro Longo ◽  
Anna Maria Venezia ◽  
Alberto Spinella ◽  
Eugenio Caponetti
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Exafs Study ◽  
Cp Mas Nmr

Determination of the structural changes by Raman and [sup 13]C CP/MAS NMR spectroscopy on native corn starch with plasticizers

2013 ◽  
Author(s):  
O. Cozar ◽  
C. Filip ◽  
N. Cioica ◽  
C. Coţa ◽  
C. Tripon ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Structural Changes ◽  
Corn Starch ◽  
Mas Nmr ◽  
Cp Mas Nmr

scholarly journals Arene guest selectivity and pore flexibility in a metal–organic framework with semi-fluorinated channel walls

2017 ◽  
Vol 375 (2084) ◽  
pp. 20160031 ◽  
Author(s):  
Rebecca Smith ◽  
Iñigo J. Vitórica-Yrezábal ◽  
Adrian Hill ◽  
Lee Brammer
Keyword(s):  
Nmr Spectroscopy ◽  
Metal Organic Framework ◽  
Magic Angle Spinning ◽  
Nitrogen Atmosphere ◽  
Magic Angle ◽  
Ambient Conditions ◽  
Solid State Transformation ◽  
X Ray ◽  
Metal Organic ◽  
Organic Framework

A metal–organic framework (MOF) with one-dimensional channels of approximately hexagonal cross-section [Ag 2 (O 2 CCF 2 CF 2 CO 2 )(TMP)] 1 (TMP =2,3,5,6-tetramethylpyrazine) has been synthesized with MeOH filling the channels in its as-synthesized form as [Ag 2 (O 2 CCF 2 CF 2 CO 2 )(TMP)]· n (MeOH) 1-MeOH ( n  = 1.625 by X-ray crystallography). The two types of ligand connect columns of Ag(I) centres in an alternating manner, both around the channels and along their length, leading to an alternating arrangement of hydrocarbon (C–H) and fluorocarbon (C–F) groups lining the channel walls, with the former groups projecting further into the channel than the latter. MeOH solvent in the channels can be exchanged for a variety of arene guests, ranging from xylenes to tetrafluorobenzene, as confirmed by gas chromatography, 1 H nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis and 13 C cross-polarization magic angle spinning NMR spectroscopy. Alkane and perfluoroalkane guests, however, do not enter the channels. Although exhibiting some stability under a nitrogen atmosphere, sufficient to enable crystal structure determination, the evacuated MOF 1 is unstable for periods of more than minutes under ambient conditions or upon heating, whereupon it undergoes an irreversible solid-state transformation to a non-porous polymorph 2 , which comprises Ag 2 (O 2 CCF 2 CF 2 CO 2 ) coordination layers that are pillared by TMP ligands. This transformation has been followed in situ by powder X-ray diffraction and shown to proceed via a crystalline intermediate. This article is part of the themed issue ‘Coordination polymers and metal–organic frameworks: materials by design’.

Carbon-13 CP/MAS NMR spectroscopy of magnesium-anthracene and -cyclooctatetraene complexes: graphite-assisted degradation of a magnesium-anthracene complex

1991 ◽  
Vol 10 (7) ◽  
pp. 2098-2100 ◽  
Author(s):  
William M. Brooks ◽  
Colin L. Raston ◽  
Rodney E. Sue ◽  
Frank J. Lincoln ◽  
Justin J. McGinnity
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Cp Mas Nmr
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