第一部份、設計合成以triketone為主體之酸致變色材料 我們利用2-醯基—1,3環己雙酮(即triketone)對pH值具高度敏感之特性，合成出其衍生物，此類衍生物在中性與鹼性環境中具有不同之結構，中性環境下呈現橘紅色，在酸性環境下則呈現透明無色，在鹼性環境下呈現黃色。除此之外，我們意外發現此衍生物也有溶劑致變色﹙solvatochromic﹚性質。 第二部分、合成4-羥基香豆素衍生物作為潛在之OLED之主發光體材料 香豆素(coumarin)衍生物因具有強螢光之特性而廣泛用於有機發光二極體（Organic Light-Emitting Diodes，OLED）的客發光體材料(Dopant Emitter Materials)，此部分探討我們合成出的4-羥基香豆素衍生物，作為潛在之OLED客發光體材料。 Part I. Rational design of a triketone-derived acidichromic and solvatochromic colorant Two unique properties of triketone (2-acylcyclohexane-1,3-dione) derivatives, that is, sensitive to both pH and solvents, have been successfully applied in design and synthesis of a novel acidichromic and solvatofluorochromic colorant. Under neutral conditions, compound 3 is orange red due to the highly conjugated system, however, it turns to yellow when a base (NaOMe) is added and changes to colorless when exposed to gaseous hydrochloric acid. Furthermore, compound 3 also displays solvatochromic and solvatofluorochromic properties in solvents with different polarities. Part II. Design and Synthesis of a potential coumarin derived organic emitting diode (OLED) material The coumrarin-based heterocyclic compound A has been chemically synthesized in 6 steps with the overall yield of 23%. The key step involved 4,5 and 6. This compound displays good photoluminescence with a green-blue light which has the potential to server as an organic light emitting diode (OLED) dopent.
