《Electric Field-Induced Assembly in Single-Stacking Terphenyl Junctions》 was written by Tang, Yongxiang; Zhou, Yu; Zhou, Dahai; Chen, Yaorong; Xiao, Zongyuan; Shi, Jia; Liu, Junyang; Hong, Wenjing. Quality Control of 9,10-Dibromoanthracene And the article was included in Journal of the American Chemical Society in 2020. The article conveys some information:
Mol. assembly is crucial in functional mol. materials and devices. Among the mol. interactions that can form assemblies, stacking among π-conjugated mol. backbones plays an essential role in charge transport through organic materials and devices. The single-mol. junction technique allows for the application of an elec. field of approx. 108 V/m to the nanoscale junctions and to investigate the elec. field-induced assembly at the single-stacking level. Here, we demonstrate an elec. field-induced stacking effect between two mols. using the scanning tunneling microscope break junction (STM-BJ) technique and we found an increase in the stacking probability with increasing intensity of the elec. field. The combined d. functional theory (DFT) calculations suggest that the mols. become more planar under the elec. field, leading to the energetically preferred stacking configuration. Our study provides a new strategy for tuning mol. assembly by employing a strong elec. field. The experimental part of the paper was very detailed, including the reaction process of 9,10-Dibromoanthracene(cas: 523-27-3Quality Control of 9,10-Dibromoanthracene)
9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Quality Control of 9,10-Dibromoanthracene
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary