Yin, Zheng; Gu, Mingxing; Ma, Huili; Jiang, Xueyan; Zhi, Jiahuan; Wang, Yafei; Yang, Huifang; Zhu, Weiguo; An, Zhongfu published an article in 2021. The article was titled 《Molecular Engineering through Control of Structural Deformation for Highly Efficient Ultralong Organic Phosphorescence》, and you may find the article in Angewandte Chemie, International Edition.Product Details of 622-95-7 The information in the text is summarized as follows:
It is an enormous challenge to achieve highly efficient organic room-temperature phosphorescence (RTP) with a long lifetime. We demonstrate that, by bridging the carbazole and halogenated Ph ring with a methylene linker, RTP phosphors CzBX (X=Cl, Br) present high phosphorescence efficiency (ΦPh). A ΦPh up to 38% was obtained for CzBBr with a lifetime of 220 ms, which is much higher than that of compounds CzPX (X=Cl, Br) with a C-N bond as a linker (ΦPh<1%). Single-crystal anal. and theor. calculations revealed that, in the crystal phase, intermol. π-Br interactions accelerate the intersystem crossing process, while tetrahedron-like structures induced by sp3 methylene linkers restrain the nonradiative decay channel, leading to the high phosphorescence efficiency in CzBBr. This research paves a new road toward highly efficient and long-lived RTP materials with potential applications in anti-counterfeiting or data encryption. In the part of experimental materials, we found many familiar compounds, such as 1-(Bromomethyl)-4-chlorobenzene(cas: 622-95-7Product Details of 622-95-7)
1-(Bromomethyl)-4-chlorobenzene(cas: 622-95-7) undergoes carbonylation in the presence of dimer of chloro(1,5-cyclooctadiene)rhodium(I) to yield the corresponding phenylacetic acid.Product Details of 622-95-7 It can be synthesized by reacting 4-chlorobenzyl alcohol with bromodimethylsulfonium bromide (BDMS) It can also be synthesized by refluxing a mixture of 4-chlorobenzaldehyde, chlorotrimethylsilane, 1,1,3,3-tetramethyldisiloxane and lithium bromide.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics