Polyimide Dendrimers Containing Multiple Electron Donor–Acceptor Units and Their Unique Photophysical Properties1. (27th April 2015)

• Record Type: Journal Article
• Authors: Toma, Francesca M.; Puntoriero, Fausto; Pho, Toan V.; La Rosa, Marcello; Jun, Young‐Si; Tremolet de Villers, Bertrand J.; Pavlovich, James; Stucky, Galen D.; Campagna, Sebastiano; Wudl, Fred
• Is Part Of: Angewandte Chemie. Volume 127:Number 23(2015)
• Page Start: 6879
• Page End: 6883
• Publication Date: 2015-04-27
• Subjects: Antennensysteme -- Dendrimere -- Donor‐Akzeptor‐Systeme -- Polycyclen -- Ultraschnelle Spektroskopie; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201501298
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: A high‐yielding synthesis of a series of polyimide dendrimers, including decacyclene‐ and perylene‐containing dendrimerD6, in which two types of polyimide dyes are present, is reported. In these constructs, the branching unit is represented by trisphenylamine, and the solubilizing chains by N ‐9‐heptadecanyl‐substituted perylene diimides. The photophysical properties of the dendrimers have been studied by absorption, steady‐state, and time‐resolved emission spectroscopy and pump–probe transient absorption spectroscopy. Photoinduced charge‐separated (CS) states are formed on the femtosecond timescale upon visible excitation. In particular, inD6, two different CS states can be formed, involving different subunits that decays independently with different lifetimes (ca. 10–100 ps).