Construction of Alkynylplatinum(II) Bzimpy‐Functionalized Metallacycles and Their Hierarchical Self‐Assembly Behavior in Solution Promoted by Pt⋅⋅⋅Pt and π–π Interactions1. Issue 41 (17th August 2016)

• Record Type: Journal Article
• Authors: Jiang, Bo; Zhang, Jing; Zheng, Wei; Chen, Li‐Jun; Yin, Guang‐Qiang; Wang, Yu‐Xuan; Sun, Bin; Li, Xiaopeng; Yang, Hai‐Bo
• Is Part Of: Chemistry. Volume 22:Issue 41(2016)
• Page Start: 14664
• Page End: 14671
• Publication Date: 2016-08-17
• Subjects: gels -- metallacycles -- platinum -- self-assembly -- supramolecular chemistry; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201601682
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A family of new alkynylplatinum(II) 2, 6‐bis(benzimidazol‐2′‐yl)pyridine (bzimpy)‐functionalized supramolecular metallacycles with different shapes and sizes have been successfully prepared by coordination‐driven self‐assembly. The obtained metallacycles showed switchable emission and a strong tendency to form intermolecular Pt⋅⋅⋅Pt and π–π stacking interactions in solution that were not displayed by their individual precursors. Further investigation revealed that the existence of the metallacyclic scaffold at the core could facilitate the formation of intermolecular Pt⋅⋅⋅Pt and π–π stacking interactions of peripheral alkynylplatinum(II) bzimpy units. Moreover, the shapes and sizes of the metallacyclic scaffold have a significant influence on the hierarchical self‐assembly behavior. Among the three metallacycles, hexagonal metallacycleA, with a relatively small size, could spontaneously self‐assemble into an aromatic guest stimuli‐responsive metallogel at room temperature without a heating–cooling process. Abstract : Guest‐induced behavior changes : A novel alkynylplatinum(II) 2, 6‐bis(benzimidazol‐2′‐yl)pyridine (bzimpy)‐functionalized supramolecular metallacycle was able to hierarchically self‐assemble into an aromatic guest stimuli‐responsive metallogel at room temperature, without the need for a heating–cooling process, mainly driven by intermolecular Pt⋅⋅⋅Pt and π–π stacking interactions (see figure).