Bis(aryl)acenaphthenequinonediimine Substituent Effect on the Properties and Coordination Environment of Ligands and Their Bis‐Chelate Ag
<sup>I</sup>
Complexes
作者:Panagiotis A. Papanikolaou、Maria Gdaniec、Barbara Wicher、Pericles D. Akrivos、Nikolai V. Tkachenko
DOI:10.1002/ejic.201300828
日期:2013.10
Ar–BIAN ligands (Ar = o-Ph, m-Cl, m-CF3, p-Cl, p-MeO, and p-Me–C6H4) with AgNO3 results in the formation of the corresponding bis-chelate complexes. Substituent groups on the aryl rings seem to offer tunability of the electronic properties of the diimines, also affecting the metal coordinationenvironment through the mono-coordination or chelation of the nitrate anion as promoted by the substituents p-MeO
Aggregation-Induced Emission of Bis(imino)acenaphthene Zinc Complexes: Photophysical Tuning via Methylation of the Flanking Aryl Substituents
作者:Daniel A. Evans、Lucia Myongwon Lee、Ignacio Vargas-Baca、Alan H. Cowley
DOI:10.1021/om501191c
日期:2015.6.8
Bis(imino)acenaphthene zinc complexes with methylated aryl substituents have been examined from the standpoint of their photoluminescent properties. Although complexes 1-4 proved to be nonemissive in solution, complexes 1 and 2 were found to emit via an aggregation-induced emission pathway. On the other hand, complexes 3 and 4 were found to be nonemissive in the solid state. Detailed crystallographic studies of complexes 1-4 provided valuable insights into the structural differences between the emissive (1 and 2) and nonemissive complexes (8 and 4), particularly with respect to their molecular Structures and crystal-packing environments. TD-DFT theoretical calculations were carried out and were found to support the hypothesis that the phosphorescent emissions of 1 and 2 are due to the existence of intermolecular pi-stacking interactions within the crystal lattices. Finally, a series of solvatomorphs of complexes 1 and 2 were synthesized and their emissive properties were studied.