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Self‐Assembly of Five 8‐Hydroxyquinolinate‐Based Complexes: Tunable Core, Supramolecular Structure, and Photoluminescence Properties
Author(s) -
Yuan Guozan,
Shan Weilong,
Qiao Xuelong,
Ma Li,
Huo Yanping
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402153
Subject(s) - photoluminescence , supramolecular chemistry , crystallography , chemistry , stacking , halogen , hydrogen bond , ligand (biochemistry) , covalent bond , crystal structure , solvent , spectroscopy , materials science , molecule , organic chemistry , biochemistry , alkyl , receptor , optoelectronics , physics , quantum mechanics
Five new Zn II complexes, namely [Zn 3 (L) 6 ] ( 1 ), [Zn 2 (Cl) 2 (L) 2 (py) 2 ] ( 2 ), [Zn 2 (Br) 2 (L) 2 (py) 2 ] ( 3 ), [Zn(L) 2 (py)] ( 4 ), and [Zn 2 (OAc) 2 (L) 2 (py) 2 ] ( 5 ), were prepared by the solvothermal reaction of ZnX 2 (X − =Cl − , Br − , F − , and OAc − ) salts with a 8‐hydroxyquinolinate ligand (HL) that contained a trifluorophenyl group. All of the complexes were characterized by elemental analysis, IR spectroscopy, and powder and single‐crystal X‐ray crystallography. The building blocks exhibited unprecedented structural diversification and their self‐assembly afforded one mononuclear, three binuclear, and one trinuclear Zn II structures in response to different anions and solvent systems. Complexes 1 – 5 featured four types of supramolecular network controlled by non‐covalent interactions, such as π⋅⋅⋅π‐stacking, CH⋅⋅⋅π, hydrogen‐bonding, and halogen‐related interactions. Investigation of their photoluminescence properties exhibited disparate emission wavelengths, lifetimes, and quantum yields in the solid state.