萘雙亞醯胺衍生物於光催化產氫反應

Abstract

發展可利用之再生能源是近年來相當受重視之研究題材，其中共軛高分子於光催化產氫之研究引起眾多學者之注意，由於氫氣被認為是極具發展潛力之再生能源，不僅不會產生對環境有害之副產物，還可將其利用於燃料電池發電亦可作為工業原料使用。於此篇論文中，我們使用萘雙亞醯胺與一系列電子予體，如聯苯、雙噻吩和具不同數量三鍵取代基之苯環進行聚合，得到P1-P5聚合物，另外亦使用芴單元合成出P6及SPF系列之聚合物，並將其作為光觸媒利用於產氫之研究，我們所合成出之聚合物的確具有產氫之功用，其中P2展現最佳之產氫效率1.70 μmol g−1 h−1。此外我們亦合成具水相官能基之P7及SPF1，指出藉由合成水相官能基可有效提升產氫效率。此外，有機光觸媒亦可用於混摻無機光觸媒，改善無機光觸媒吸收較偏紫外光之缺點，進而提升產氫效率。最後我們將產氫反應後之溶液進行質譜儀量測，透過分析反應後之產物，期望能一窺產氫機制的奧秘。

Much research effort has been devoted to the field of renewable energy. Recently, photo-induced hydrogen evolution catalyzed by conjugated polymers has attracted research attention. On account of fact that hydrogen is considered a clean energy source, it can not only be applied to the fuel cell, but also be used as industrial materials. Herein, naphthalene diimide (NDI) was polymerized with various electron donors, such as biphenyl, bithiophene, and ethynylbenzene, respectively, through Stille or Sonorgashira coupling to furnish P1 to P5. Furthermore, fluorene was also utilized in the polymerization to afford P6 and SPF. All polymers were found to be active in the photo-induced hydrogen evolution reaction. P2 exhibited a highest hydrogen evolution rate (HER) of 1.70 μmol g−1 h−1 among these photocatalysts. P6 and SPF were functionalized with hydrophilic moieties to give P7 and SPF1, resulting in higher HERs. Moreover, synthesized polymers were blend with inorganic photocatalysts and improved HERs were observed. Last but not least, a mixture subsequent to the hydrogen evolution reaction was analyzed by mass spectrometry, revealing the possible working principles for the photo-induced hydrogen evolution.