Qi, Qingkai; Jiang, Shan; Qiao, Qinglong; Wei, Jinbei; Xu, Bin; Lu, Xiaocun; Xu, Zhaochao; Tian, Wenjing published the artcile< Direct observation of intramolecular coplanarity regulated polymorph emission of a tetraphenylethene derivative>, Category: bromides-buliding-blocks, the main research area is tetraphenylethene preparation crystal polymorphism electronic transition.
Polymorphism makes it possible to clarify the relationship between emission property and crystal structure. However, based on the exact mol. conformation in tetraphenylethene polymorphisms, it is still challenging to evaluate the difference of intramol. coplanarity without the support of calculation because of the complex combination of four different torsion angles between four peripheral benzenes and the central ethylene plane. Here, by using a di-formyl-functionalized tetraphenylethene derivative, two ideal polymorphisms with a consistent trend of the corresponding torsion angles have been obtained. For the first time, we explicitly demonstrated that intramol. coplanarity is the underlying cause of the polymorphism-dependent emission of tetraphenylethene derivatives
Chinese Chemical Letters published new progress about Bathochromic effect. 184239-35-8 belongs to class bromides-buliding-blocks, and the molecular formula is C26H18Br2, Category: bromides-buliding-blocks.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary