Abstract
Temperature dependences of 14N NQR frequency and spin-lattice relaxation time ( T 1) have been investigated in a mixed system [(CH 2) 6N 4] 1− x [KNO 2] x . From T 1 measurement, the activation energy ( E a ) on reorientational motion above 270 K in the pure (CH 2) 6N 4 is determined to be E a =15.1 kcal mole −1, in agreement with a previous report. The E a determined in the mixed system [(CH 2) 6N 4] 1− x [KNO 2] x with x=0.06, 0.13 and 0.24 are found to be 16.6±1.0, 22.1±1.6 and 32.5±3.2 kcal mol −1, respectively. The increase of E a in the mixed system compared to that in the pure (CH 2) 6N 4 implies that introducing KNO 2 impurity in the (CH 2) 6N 4 matrix causes an increase of the potential barrier of the reorientational motion in (CH 2) 6N 4 leading to the suppression of the motion.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
