Syntheses, crystal structures and photoluminescent properties of dinuclear and tetranuclear zinc complexes with 1,4-bis(2,2':6',2″-terpyridine-4'-yl)benzene

• Published in: Journal of coordination chemistry Vol. 74; no. 4-6; pp. 927 - 941
• Main Authors: Li, Heng-Shi, Zhang, Sheng-Mei, Ye, Ping, Sun, Tao, Wang, Kai, Zhang, Xiu-Qing, Li, Yan
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 23.03.2021; Taylor & Francis Ltd
• Subjects: Benzene; bis-terpyridine; Crystal structure; Crystals; Dimethylformamide; Hirshfeld surface; Hydrocarbons; Infrared analysis; Photoluminescence; Single crystals; Synthesis; Thermal decomposition; Thermogravimetric analysis; Two dimensional analysis; X ray powder diffraction; X-ray diffraction; Zinc; Zinc complex
• ISSN: 0095-8972; 1029-0389
• DOI: 10.1080/00958972.2020.1861602

Two zinc complexes, [(HCOO) 2 Zn(μ-bteb)Zn(OOCH) 2 ]·2H 2 O (1) and {[(HCOO)Zn(μ-bteb)Zn(OOCH)] 2 (μ-O) 2 }·DMF·6H 2 O (DMF = dimethylformamide) (2), containing a π-conjugated "back to back" bis-terpyridine ligand 1,4-bis(2,2':6',2''-terpyridin-4'-yl)benzene (bteb) have been solvothermally synthesized and characterized via elemental analysis, infrared spectroscopy, thermogravimetric analysis, single-crystal X-ray diffraction, and powder X-ray diffraction. 1 and 2 are dumbbell-like dinuclear and rectangle tetranuclear Zn II complexes, respectively. It is interesting that these complexes were synthesized by adjusting the ratio of DMF and H 2 O. The X-ray crystal structure reveals that Zn II metal centers in 1 are five-coordinate by three nitrogens from bteb and two oxygens from monodentate formate ions, while Zn II metal centers in 2 are five-coordinate containing three nitrogens from bteb, one oxygen from a monodentate formate and the other one from a bridging O. Hirshfeld surface analyses and 2-D fingerprint plots display that the main interactions are O···H/H···O and H···H intermolecular interactions in 1 and 2. The thermal decomposition behaviors of 1 and 2 were studied by using thermogravimetric analysis. UV-Vis absorption and photoluminescent properties of 1 and 2 were also investigated.