ed binaphthyl product 3 and the monospirooxazine-substituted binaphthyl derivative 4, respectively. The thermally reversible photochromic behavior of the target axially chiral spirooxazines 3 was investigated, and both the ring-opening process upon irradiation with 365 nm light and the thermally reverse ring-closing process were fast. These chiral spirooxazines were found to impart their chirality
在N 2气氛和有氧条件下,二
硼酸1和
溴-螺恶嗪2的Suzuki反应分别得到二螺恶嗪取代的联
萘产物3和单螺恶嗪取代的联
萘衍
生物4。对目标轴向手性螺恶嗪3的热可逆光致变色行为进行了研究,并且在365 nm光照射下的开环过程和反向热闭环过程都很快。发现这些手性螺恶嗪在低掺杂
水平下将它们的手性赋予非手性液晶主体,以形成自组织的光响应性螺旋超结构。