Monitoring dynamic pre-crystallization aggregation processes in solution by VT-DOSY NMR spectroscopy

2022 ◽  
Author(s):  
Andreas Mix ◽  
Jan-Hendrik Lamm ◽  
Jan Schwabedissen ◽  
Erich Gebel ◽  
Georg Stammler ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Halogen Bond ◽  
Diffusion Nmr ◽  
Aggregation Processes ◽  
Dosy Nmr

Equimolar mixtures of pyridine (Py) with para-halotetrafluoro-pyridine (BrTFP and ITFP) were investigated by VT-diffusion NMR experiments. The formation of a halogen-bond-stabilized ITFP·Py complex was de¬tected upon cooling a solution in...

Extraction of Reliable Molecular Information from Diffusion NMR Spectroscopy: Hydrodynamic Volume or Molecular Mass?

2019 ◽  
Vol 25 (42) ◽  
pp. 9930-9937 ◽  
Author(s):  
Francesco Zaccaria ◽  
Cristiano Zuccaccia ◽  
Roberta Cipullo ◽  
Alceo Macchioni
Keyword(s):  
Nmr Spectroscopy ◽  
Molecular Mass ◽  
Hydrodynamic Volume ◽  
Diffusion Nmr ◽  
Molecular Information

Tributyl Phosphate Aggregation in the Presence of Metals: An Assessment Using Diffusion NMR Spectroscopy

2016 ◽  
Vol 120 (47) ◽  
pp. 12184-12192 ◽  
Author(s):  
Anna G. Baldwin ◽  
Yuan Yang ◽  
Nicholas J. Bridges ◽  
Jenifer C. Braley
Keyword(s):  
Nmr Spectroscopy ◽  
Tributyl Phosphate ◽  
Diffusion Nmr

A kinetic study of mechanochemical halogen bond formation by in situ31P solid-state NMR spectroscopy

2017 ◽  
Vol 53 (71) ◽  
pp. 9930-9933 ◽  
Author(s):  
Yijue Xu ◽  
Lysiane Champion ◽  
Bulat Gabidullin ◽  
David L. Bryce
Keyword(s):  
Activation Energy ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Kinetic Study ◽  
Solid State Nmr ◽  
Halogen Bond ◽  
Bond Formation ◽  
Nmr Studies ◽  
Solid State Nmr Spectroscopy

In situ 31P solid-state NMR studies of mechanochemical halogen bond formation provide insights into the cocrystallisation process and an estimate of the activation energy.

27Al Pulsed Field Gradient, Diffusion–NMR Spectroscopy of Solvation Dynamics and Ion Pairing in Alkaline Aluminate Solutions

2018 ◽  
Vol 122 (48) ◽  
pp. 10907-10912 ◽  
Author(s):  
Trent R. Graham ◽  
Kee Sung Han ◽  
Mateusz Dembowski ◽  
Anthony J. Krzysko ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Field Gradient ◽  
Ion Pairing ◽  
Solvation Dynamics ◽  
Pulsed Field ◽  
Diffusion Nmr ◽  
Gradient Diffusion

Integrating31P DOSY NMR Spectroscopy and Molecular Mechanics as a Powerful Tool for Unraveling the Chemical Structures of Polyoxomolybdate-Based Amphiphilic Nanohybrids in Aqueous Solution

2014 ◽  
Vol 20 (18) ◽  
pp. 5258-5270 ◽  
Author(s):  
Pavletta Shestakova ◽  
Gregory Absillis ◽  
Francisco J. Martin-Martinez ◽  
Frank De Proft ◽  
Rudolph Willem ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Nmr Spectroscopy ◽  
Molecular Mechanics ◽  
Chemical Structures ◽  
Dosy Nmr

133Cs Diffusion NMR Spectroscopy: A Tool for Probing Metal Cation–π Interactions in Water

ChemPhysChem ◽  
2007 ◽  
Vol 8 (5) ◽  
pp. 643-645 ◽  
Author(s):  
Diana Cuc ◽  
Daniel Canet ◽  
Jean-Pierre Morel ◽  
Nicole Morel-Desrosiers ◽  
Pierre Mutzenhardt
Keyword(s):  
Nmr Spectroscopy ◽  
Metal Cation ◽  
Π Interactions ◽  
Diffusion Nmr

Molecular Weights of Cyclic and Hollow Clusters Measured by DOSY NMR Spectroscopy

2009 ◽  
Vol 131 (47) ◽  
pp. 17254-17259 ◽  
Author(s):  
Sébastien Floquet ◽  
Sébastien Brun ◽  
Jean-François Lemonnier ◽  
Marc Henry ◽  
Marc-André Delsuc ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Molecular Weights ◽  
Dosy Nmr

Domain Size Determination of Poly(phthalamide)/Poly(dimethylsiloxane) Block Copolymers by1H Solid-State Spin Diffusion NMR Spectroscopy

2008 ◽  
pp. 339-343
Author(s):  
Axel Kretschmer ◽  
Robert A. Drake ◽  
Simeon J. Bones ◽  
Michael Neidhoefer ◽  
Manfred Wilhelm ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Block Copolymers ◽  
Spin Diffusion ◽  
Domain Size ◽  
Size Determination ◽  
Diffusion Nmr ◽  
State Spin

scholarly journals Stability Evaluation and Degradation Studies of DAC® Hyaluronic-Polylactide Based Hydrogel by DOSY NMR Spectroscopy

Biomolecules ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1478
Author(s):  
Tatiana Guzzo ◽  
Fabio Barile ◽  
Cecilia Marras ◽  
Davide Bellini ◽  
Walter Mandaliti ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Nmr Spectroscopy ◽  
Bone Growth ◽  
Orthopedic Implants ◽  
Structured Surfaces ◽  
Physiological Conditions ◽  
Hydrophilic Character ◽  
Dosy Nmr ◽  
The Stability

The stability and the degradation of polymers in physiological conditions are very important issues in biomedical applications. The copolymer of hyaluronic acid and poly-D,L-lactic acid (made available in a product called DAC®) produces a hydrogel which retains the hydrophobic character of the poly-D,L-lactide sidechains and the hydrophilic character of a hyaluronic acid backbone. This hydrogel is a suitable device for the coating of orthopedic implants with structured surfaces. In fact, this gel creates a temporary barrier to bacterial adhesion by inhibiting colonization, thus preventing the formation of the biofilm and the onset of an infection. Reabsorbed in about 72 h after the implant, this hydrogel does not hinder bone growth processes. In the need to assess stability and degradation of both the hyaluronan backbone and of the polylactic chains along time and temperature, we identified NMR spectroscopy as a privileged technique for the characterization of the released species, and we applied diffusion-ordered NMR spectroscopy (DOSY-NMR) for the investigation of molecular weight dispersion. Our diffusion studies of DAC® in physiological conditions provided a full understanding of the product degradation by overcoming the limitations observed in applying classical chromatography approaches by gel permeation UV.

Probing the interactions between all components of the catalytic pool for homogeneous olefin polymerisation by diffusion NMR spectroscopy

2013 ◽  
Vol 42 (25) ◽  
pp. 9104 ◽  
Author(s):  
Luca Rocchigiani ◽  
Vincenzo Busico ◽  
Antonello Pastore ◽  
Alceo Macchioni
Keyword(s):  
Nmr Spectroscopy ◽  
Diffusion Nmr
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