Proton spin-lattice relaxation and reduced values for the carbon-13 nuclear Overhauser enhancement

1977 ◽  
Vol 99 (1) ◽  
pp. 42-43 ◽  
Author(s):  
J. D. Cutnell ◽  
Jay A. Glasel
Keyword(s):  
Lattice Relaxation ◽  
Proton Spin ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Nuclear Overhauser Enhancement ◽  
Nuclear Overhauser

Conformation and dynamics in solution of an N-quaternarized benzophenone derivative: a molecule active as UV filter

1991 ◽  
Vol 69 (6) ◽  
pp. 913-918 ◽  
Author(s):  
Cecilia Anselmi ◽  
Marisanna Centini ◽  
Mirella Scotton ◽  
Alessandro Sega
Keyword(s):  
Alkyl Chain ◽  
Lattice Relaxation ◽  
Proton Spin ◽  
Spin Lattice Relaxation ◽  
Proton Relaxation ◽  
Relaxation Rates ◽  
Uv Filter ◽  
Spin Lattice ◽  
Nuclear Overhauser Enhancement ◽  
Nuclear Overhauser

The dynamics and conformation of N,N-dimethyl-N-|3-(benzoyl-4-phenoxy)|-N-n-dodecylammonium bromide, 1, have been established in two solvents (CDCl3 and DMSO-d6) by the use of 13C spin-lattice relaxation rates, non-selective and selective proton spin-lattice relaxation rates, and 1H–{1H} nuclear Overhauser enhancement (nOe) experiments. The data obtained are consistent with two main mean conformations for compound 1: a "linear" conformation in CDCl3 and a folded conformation in DMSO-d6 where the alkyl chain forms a loop toward the aromatic moiety. Key words: UV filter, carbon and proton relaxation rates, nuclear Overhauser enhancement experiments, solvent dependent conformations.

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