| 摘要 |
Disclosed is a polymer comprising covalently bound side chains of the formula -X-Y-Z-R wherein X is a spacer group; is a sulphur, selenium or tellurium atom; Z is a sulphur, selenium or tellurium atom any of which may be bonded to one or two oxygen atoms; and wherein R is any suitable moiety such that -Z-R constitutes a leaving group.
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