The ring-opening metathesis polymerization of barrelene (bicyclo[2.2.2]octa-2,5,7-triene) is described. The monomer was synthesized using an optimized route and characterized, for the first time, using X-ray diffraction analysis of a coordination complex. The solubility of poly(barrelene) was found to correlate with the ratio of cis to trans exocyclic vinylenes in the polymer backbone. Copolymers of barrelene and norbornene were also prepared and used to obtain robust films. The barrelene-containing polymers underwent spontaneous dehydrogenation under air or upon being subjected to laser pulses to afford poly(phenylene vinylene). A series of well-defined patterns with micrometer dimensions were created by direct laser writing on films of poly(barrelene-co-norbornene) and visualized by the fluorescence of the conjugated polymer that formed upon irradiation.

中文翻译：

---

在聚（桶烯）上直接激光写入聚亚苯基亚乙烯基

描述了桶烯（双环[2.2.2]八-2,5,7-三烯）的开环易位聚合。使用最优化路线合成单体，并首次使用配位体的X射线衍射分析对其进行表征。发现聚（桶烯）的溶解度与聚合物主链中顺式与反式环外亚乙烯基的比率相关。还制备了桶烯和降冰片烯的共聚物，并用于获得坚固的膜。含桶烯的聚合物在空气中或在经受激光脉冲后进行自发脱氢，得到聚（亚苯基亚乙烯基）。通过直接在聚（barrelene- co-降冰片烯），并通过照射后形成的共轭聚合物的荧光进行可视化。