Multifunctional naphthalene diimide-based coordination polymers: Photochromism and solventchromism. (June 2020)

• Record Type: Journal Article
• Authors: Liu, Jian-Jun; Xia, Shu-Biao; Liu, Dan; Hou, Juying; Suo, Hongbo; Cheng, Fei-Xiang
• Is Part Of: Dyes and pigments. Volume 177(2020)
• Publication Date: 2020-06
• Subjects: Photochromism -- Solventchromism -- Naphthalene diimide -- CPs -- Electron transfer; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2020.108269
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Naphthalene diimides (NDIs), a class of organic dyes with high photochemical activity and high redox activity, have attracted considerable interest attributing to their photoinduced electron transfer to form stable radical anions upon irradiation in the presence of electron donors. In this study, a naphthalenediimide-based ligand and different aromatic carboxylic acids self-assembled in the presence of zinc ions, forming three novel coordination polymers, [Zn2 (DPMNI) (TPDC)2 ] (1 ), [Zn (DPMNI) (BPC)] (2 ), Zn (DPMNI) (HBTC) (3 ) (DPMNI = N, N ′-bis(4-pyridylmethyl)-1, 4, 5, 8-naphthalene diimide, H2 TPDC = thiophene-2, 5-dicarboxylic acid, H2 BPC = 4, 4′-biphenyldicarboxylic acid, H3 BTC = 1, 3, 5-benzenetricarboxylic acid). These coordination polymers characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, powder X-ray diffraction, and theromgravimetric analysis. Because of the presence of electron-deficient NDI moieties, they exhibit reversible photochromic properties. Furthermore, due to the different π–π interactions between the NDI moieties and aromatic carboxylic acid, compounds 1 –3 exhibit different photosensitive properties. Moreover, the solvatochromic behaviour of compound 1 was also investigated. Graphical abstract: Three novel NDI-based coordination polymers were prepared by solvothermal reaction, which exhibit reversible photochromic properties and solvatochromic behaviour in the presence of different solvents. Image 1 Highlights: Three CPs based on electron-deficient naphthalene diimide dye are prepared. Compounds 1–3 exhibit the visibly detectable photochromism. Compound 1 exhibits solvatochromic behaviour in the presence of different solvents. Solvatochromic effect of compound 1 arise from the intermolecular electron-transfer transition.