Room-temperature phosphorescence of cucurbit[7]uril recognized naphthalimide derivative

• Published in: Dyes and pigments Vol. 142; pp. 300 - 305
• Main Authors: Xu, Lei, Zou, Lei, Chen, Hui, Ma, Xiang
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2017
• Subjects: Cucurbituril; Host−guest interaction; Naphthalimide derivative; Room-temperature phosphorescence; Host−guest interaction; Naphthalimide derivative; Room-temperature phosphorescence; Cucurbituril
• ISSN: 0143-7208; 1873-3743
• DOI: 10.1016/j.dyepig.2017.03.044

It is well known that most purely organic molecules give out no room-temperature phosphorescence due to consuming the energy of molecular vibration, inefficient spin-orbit coupling and easy-quenched radiation relaxation process. Room-temperature phosphorescence emission was presented by the host-guest interactions between cucurbit[7]uril and a naphthalimide derivative 2-(4-aminobutyl)-6-bromo-1H-benzo[de]isoquinoline-1,3(2H)-dione. This cucurbit[7]uril recognized supramolecular system can emit room-temperature phosphorescence signal in aqueous solution, as well as the 4-bromo-1,8-naphthalic anhydride polymer/cucurbit[7]uril system. The conformation of the complex was established by 1H-1H ROESY NMR techniques. The binding patterns and constant of this supramolecular system were well defined, and its photophysical and photochemical properties found in detail as well. [Display omitted] •A novel room-temperature phosphorescence system via host-guest interaction was constructed.•The phosphorescence emission and lifetime of the system were thoroughly investigated.•The binding pattern and constant between cucurbit[7]uril and guest was determined.