Bright Solid‐State Emission of Disilane‐Bridged Donor–Acceptor–Donor and Acceptor–Donor–Acceptor Chromophores. Issue 9 (28th January 2016)

• Record Type: Journal Article
• Authors: Shimada, Masaki; Tsuchiya, Mizuho; Sakamoto, Ryota; Yamanoi, Yoshinori; Nishibori, Eiji; Sugimoto, Kunihisa; Nishihara, Hiroshi
• Is Part Of: Angewandte Chemie international edition. Volume 55:Issue 9(2016)
• Page Start: 3022
• Page End: 3026
• Publication Date: 2016-01-28
• Subjects: aggregation -- disilanes -- fluorescence -- silicon -- solid-state structures; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201509380
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: The development of disilane‐bridged donor–acceptor–donor (D‐Si‐Si‐A‐Si‐Si‐D) and acceptor–donor–acceptor (A‐Si‐Si‐D‐Si‐Si‐A) compounds is described. Both types of compound showed strong emission ( λ em =ca. 500 and ca. 400 nm, respectively) in the solid state with high quantum yields ( Φ : up to 0.85). Compound4 exhibited aggregation‐induced emission enhancement in solution. X‐ray diffraction revealed that the crystal structures of2, 4, and12 had no intermolecular π–π interactions to suppress the nonradiative transition in the solid state. Abstract : Disilane‐bridged donor–acceptor–donor (D‐Si‐Si‐A‐Si‐Si‐D) molecules and acceptor–donor–acceptor (A‐Si‐Si‐D‐Si‐Si‐A) compounds display strong solid‐state emission (see picture) and aggregation‐induced emission (AIE). X‐ray diffraction reveals there is no π–π stacking in crystals to suppress intermolecular interaction.