Synthesis, crystal structures and photo-thermal properties of five naphthyl-functionalized Copper(II) coordination compounds

• Published in: Inorganica Chimica Acta 2021-01, Vol.514, p.120018, Article 120018
• Main Authors: Wang, Hao-Hai, Li, Jing-Zhe, Nie, Jing, Yao, Zi-Xuan, Li, Hong-Jing, Liu, Kuan-Guan, Yan, Xiao-Wei
• Format: Article
• Language: English
• Subjects: Chromophores; Coordination compound; Coordination compounds; Copper compounds; Copper converters; Copper(II); Crystal structure; Light-harvesting system; Naphthyl-functionalized; Photo-thermal property; Photothermal conversion; Single crystals; Solar energy absorbers; Solid state; Structural analysis; Thermodynamic properties
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2020.120018

Series of naphthyl-functionalized Copper(II) coordination compounds have been characterized clearly and their optical absorption, thermal stability and photo-thermal properties are carefully investigated. This study provides some clues for illustrating the molecular mechanisms of solar absorber and photothermal conversion molecular materials. [Display omitted] •Five mononuclear Copper(II) coordination compounds have been structurally designed, isolated and characterized.•Typical photothermal conversion molecules with double chromophores (one antenna chromophore (NT group here) and the second chromophores (Cu(dmap)42+, Cu(dmap)22+, Cu(bpy)22+ and Cu(phen)22+).)•The results of this research give some clues for illustrating the molecular mechanisms of solar absorber and photothermal conversion molecular materials. For achieving solar absorber and conversion molecular materials with excellent photothermal conversion ability, five mononuclear Copper(II) coordination compounds have been designed and isolated. They are fully characterized by IR, Powder XRD, Solid-state UV, and TGA. Single-crystal X-ray structural analysis reveals that they are typical photothermal conversion molecules with double chromophores: one antenna chromophore (NT group here) and the second chromophores (Cu(dmap)42+, Cu(dmap)22+, Cu(bpy)22+ and Cu(phen)22+). Both chromophores have great influence on their solid-state optical absorption. Their photothermal conversion experiments show that compounds 3, 4 and 5 have the better results (the highest temperature increment 21.7 ℃ and equilibrium temperature ~ 60.7 ℃) than compounds 1 and 2. Those results give some clues for illustrating the molecular mechanisms of solar absorber and photothermal conversion molecular materials.