Teaching New Tricks to an Old Indicator: pH-Switchable, Photoactive Microporous Polymer Networks from Phenolphthalein with Tunable CO2 Adsorption Power

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• 作者：Baris Kiskan ; Markus Antonietti ; Jens Weber
• 刊名：Macromolecules
• 出版年：2012
• 出版时间：February 14, 2012
• 年：2012
• 卷：45
• 期：3
• 页码：1356-1361
• 全文大小：340K
• 年卷期：v.45,no.3(February 14, 2012)
• ISSN：1520-5835

文摘

Switchable, organic microporous networks were synthesized by Sonogashira coupling of tetrabromophenolphthalein with 1,4-diethynylenebenzene using optimized reaction conditions. The resulting networks are microporous and have specific surface areas exceeding 800 m² g^鈥?. The microporosity and the pore polarity are sensitive to the pH value as evidenced by nitrogen and carbon dioxide physisorption experiments. The switching between the open and closed form of the lactone ring is reversible, but some porosity is lost throughout the process. The colored, alkaline salts of these networks are photochemically active, as shown by the effective heterogeneous photosensitization of the photopolymerization of methyl methacrylate with visible light.