There is provided a polygermane compound forming a film having a high refractive index and thermal stability, and containing a sulfur atom-containing organic group as a group bonded to a germanium atom. A polygermane compound comprising a sulfur atom-containing organic group as a group bonded to a germanium atom, in which the sulfur atom-containing organic group is a group of Formula [1]:
-L-Z [1]
where L is a single bond, a C1-6 alkylene group, or a C4-20 arylene group optionally substituted with a C1-6 alkyl group; and Z is a C1-20 sulfide group, a C1-14 cyclic sulfide group optionally substituted with a C1-6 alkyl group, a C2-20 alkyl group containing a sulfide bond, or a C5-20 aralkyl group containing a sulfide bond, with a proviso that when L is a single bond, Z is not a C1-20 sulfide group.
本发明提供了一种聚
锗烷化合物,其形成的薄膜具有高折射率和热稳定性,并含有一个含
硫原子的有机基团作为与
锗原子键合的基团。一种聚
锗烷化合物,包含一个作为与
锗原子键合的基团的含
硫原子有机基团,其中含
硫原子有机基团为式[1]的基团:
-L-Z [1]
其中 L 是单键、C1-6 亚烷基或任选被 C1-6 烷基取代的 C4-20 芳烷基;Z 是 C1-20
硫化物基团、任选被 C1-6 烷基取代的 C1-14 环
硫化物基团、含有
硫化物键的 C2-20 烷基或含有
硫化物键的 C5-20 芳烷基,但当 L 是单键时,Z 不是 C1-20
硫化物基团。