SYNTHESIS AND NONLINEAR-OPTICAL ANALYSIS OF TRIBLOCK COPOLYMERS CONTAINING DISCRETE POLYENES

被引:11
作者
CRAIG, GSW
COHEN, RE
SCHROCK, RR
DHENAUT, C
LEDOUX, I
ZYSS, J
机构
[1] MIT,DEPT CHEM ENGN,CAMBRIDGE,MA 02139
[2] MIT,DEPT CHEM,CAMBRIDGE,MA 02139
[3] CTR NATL ETUD TELECOMMUN,CNRS,LAB ASSOCIE 250,F-92220 BAGNEUX,FRANCE
关键词
D O I
10.1021/ma00085a032
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Ring-opening metathesis polymerization of methyltetracyclododecene with Mo(CHCMe3)(NAr)(OCMe3)2(Ar = 2,6-diisopropylphenyl) followed by termination with an excess of conjugated dialdehyde yielded end-functionalized homopolymers with low polydispersities. Subsequent linking of the homopolymers with either a conjugated, difunctional molybdenum alkylidene complex or a bisphosphonate ester resulted in triblock copolymers containing a discrete 9-, 10-, 11-, or 12-ene. The hyperpolarizabilities of the polyenes were measured with electronic field induced second harmonic generation and corresponded well with polyene hyperpolarizabilities found in a previous study of triblock copolymers containing a distribution of polyenes.
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页码:1875 / 1878
页数:4
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