Quinolines: T1 NMR relaxation times of quinolines as a function of temperature in liquid and supercooled liquid state

✍ Scribed by L. Gauthier; J.-B. Robert; D. Canet

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 504 KB
• Volume: 85
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(99)00165-8

✦ Synopsis

The behavioUr of the xJC spin-lattice relaxation time as a function of temperature is reported for eight quinoline family compounds. For a set of compounds (ln T~ -~) = f(T -1) is linear, for the other set (In T~ -1) = f(T -~) is best represented by two linear straight lines which intercept at a temperature Tt which depends upon the compound. For quinoline and lepidine the study has been also performed i-n the supercooled state. T11 shows a maximum for lepidine', and the relaxation time evolution as a function of T may be interpreted using a stretched exponential correlation function.