| 摘要 |
<p>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.</p> |
