Polarization effect in luminescent mesogenic BF2 complexes derived from heterocyclic benzothiazoles
作者:Yuan−Chun Hsu、Chun−Yang Wang、Pei−Chi Hsiao、Yi-Hong Cai、Gene−Hsiang Lee、Chung K. Lai
DOI:10.1016/j.molliq.2019.111660
日期:2020.1
Two series of benzo(thia)xazoles 1–2 and one series of boron difluoride complexes 2-BF2 derived from benzothiazoles 2 were reported, and their mesomorphic and optical properties were investigated. The crystal and molecular structures of compound 2 and 2-BF2 (all n = 8) were determined by means of X-ray structural analysis, and both crystallize in the triclinic P-1 and monoclinic P21/c. The geometry
两个系列苯并(硫杂)的xazoles 1-2和一个串联二氟化硼络合物的2-BF 2从苯并噻唑衍生的2报道,他们的介晶和光学性能进行了研究。 通过X射线结构分析确定化合物2和2-BF 2(全部n= 8)的晶体和分子结构,并且都在三斜晶系P-1和单斜晶系P 2 1 / c中结晶。硼中心的几何形状完全是四面体,整体分子形状被认为是棒状。苯并(thia)xazoles 1和2表现出N或/和SmC相,硼配合物2-BF 2形成N或/和SmC相。苯并噻唑2的中间相温度范围比苯并恶唑1宽得多,这归因于掺入的硫原子具有更好的极化作用。硼配合物2-BF 2(n = 10,12) 在CH 2 Cl 2中在λmax = 569–571 nm处发射出黄绿色发射光。这是第一个衍生自苯并噻唑的介晶BF 2配合物。