Certain compounds within the general formula (I)
1
wherein:
Ra and Ra′ are independently alkyl, aryl or aralkyl; Rb and Rb′ are independently CH
2
, CH-alkyl, CH-aryl or CH-aralkyl; R
1
and R
2
, are independently selected from substituted or unsubstituted alkyl, aryl, aralkyl, heteroaryl, heteroaralkyl; and m is at least 1, and preferably fluorinated or cross-linkable under controlled conditions.
Compounds of formula (I) are reactable with silanediols to produce linear polycondensate organosiloxanes of defined structure without uncontrolled crosslinking. The polycondensates may be cured and are suitable as optical materials.
在通用公式(I)1中,某些化合物如下:其中:Ra和Ra′独立地为烷基、芳基或芳烷基;Rb和Rb′独立地为
CH2、CH-烷基、CH-芳基或CH-芳烷基;R1和R2独立地选自取代或不取代的烷基、芳基、芳烷基、杂芳基、杂芳烷基;m至少为1,最好是
氟化的或在控制条件下可交联的。公式(I)的化合物可以与
硅二醇反应,产生具有明确定义结构的线性多聚缩合有机
硅氧烷,而不会发生不受控制的交联。这些多聚缩合物可以固化,并适合用作光学材料。