Unexpected Strong Blue Photoluminescence Produced from the Aggregation of Unconventional Chromophores in Novel Siloxane鈥揚oly(amidoamine) Dendrimers

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• 作者：Hang Lu ; Linglong Feng ; Shusheng Li ; Jie Zhang ; Haifeng Lu ; Shengyu Feng
• 刊名：Macromolecules
• 出版年：2015
• 出版时间：February 10, 2015
• 年：2015
• 卷：48
• 期：3
• 页码：476-482
• 全文大小：407K
• ISSN：1520-5835

文摘

Poly(amidoamine) (PAMAM) dendrimers and hyperbranched poly(amidoamine)s are the first reported and most investigated luminescent polymers containing unconventional chromophores. The luminescence of these compounds is associated with the N-branched tertiary amine moiety, and the oxidation of the tertiary amine is assigned to the emitting source. However, in this paper, a series of novel siloxane鈥損oly(amidoamine) (Si-PAMAM) dendrimers were synthesized by aza-Micheal reaction, and strong blue photoluminescence was observed even with the naked eye when these compounds were excited by a UV lamp. All of these compounds were not oxidated at all. Studies on the molecular structure showed that N 鈫?Si coordination bonds existed in these compounds, and those N 鈫?Si bonds caused the aggregation of carbonyl groups which show the strong luminescence.