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A time-resolved electron spin resonance study of the triplet states of 2,2′-bipyridine and its singly protonated cation

✍ Scribed by Mikio Yagi; Yasuaki Deguchi; Yasushi Shioya; Jiro Higuchi

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
368 KB
Volume
144
Category
Article
ISSN
0009-2614

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✦ Synopsis

Time-resolved ESR spectra have been observed for the lowest triplet states of 2,2'-bipyridine (bpy) and singly protonated bpy (bpyH+) in ethanol at 77 K. With the aid of computer simulation, it is concluded that the T, sublevel is most active in S, +T, intersystem crossing in both molecules studied and (P,-P,)l(P,-P,) changes from 9 in s-trans-bpy to 1.5 in bpyH+ (P, are relative populating rates; y and z, close to in-plane long and short axes, respectively).

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