The heteroatom effect on the chiroptical property of X-shaped double hetero[7]helicene was first investigated by comparing double oxa[7]helicene with newly synthesized double thia/sulfone[7]helicenes. Upon variation of the embedded heteroatoms from oxygen to sulfur, the circularly polarized luminescence (CPL) of these double heterohelicenes were significantly red-shifted, along with the improved luminescence dissymmetry factors.

中文翻译：

---

通过杂原子变化具有受控光物理和手性光学性质的双硫杂/砜[7]螺旋烯

首先通过比较双氧杂[7]螺烯和新合成的双硫杂硫杂[7]螺烯来研究杂原子对X形双杂[7]螺烯手性的影响。随着嵌入的杂原子从氧到硫的变化，这些双杂螺烯的圆偏振发光（CPL）显着红移，同时发光不对称因子也得到了改善。