An investigation of  1 H and  13 C longitudinal relaxation and relaxation in the rotating frame in solid poly( N ‐vinylcarbazole) | Zendy

Heatley Frank | Zendy; Karali Aglaia | Zendy; Dais Photis | Zendy

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An investigation of 1 H and 13 C longitudinal relaxation and relaxation in the rotating frame in solid poly( N ‐vinylcarbazole)

Author(s) -

Heatley Frank,

Karali Aglaia,

Dais Photis

Publication year - 2001

Publication title -

polymer international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.592

H-Index - 105

eISSN - 1097-0126

pISSN - 0959-8103

DOI - 10.1002/pi.727

Subject(s) - relaxation (psychology) , spin–lattice relaxation , nitrogen , spin diffusion , paramagnetism , spin–spin relaxation , diffusion , materials science , magnetic relaxation , nuclear magnetic resonance , chemistry , analytical chemistry (journal) , thermodynamics , magnetic field , condensed matter physics , physics , magnetization , organic chemistry , psychology , social psychology , quantum mechanics

1 H and 13 C longitudinal relaxation times ( T 1 ) and relaxation times in the rotating frame ( T 1ρ ) have been measured for poly( N ‐vinylcarbazole) in the solid state in air and nitrogen atmospheres in an attempt to elucidate molecular motions. In air, the T 1 relaxation of both 1 H and 13 C was dominated by interaction with absorbed paramagnetic oxygen. In nitrogen, the 13 C T 1 relaxation times were long (>300 s) and were averaged by 13 C– 13 C spin diffusion. The 13 C T 1ρ relaxation times showed an exponential dependence on the strength of the rotating 13 C magnetic field and were thus controlled by spin–spin processes rather than spin–lattice processes. © 2001 Society of Chemical Industry

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