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合成了新的给受体型四苯乙烯修饰的喹喔啉衍生物BTPQ、DBTPQ和BTBQ.三个化合物表现出不同程度的聚集诱导发光(AIE)行为,当BTBQ(四苯乙烯单元修饰在喹喔啉的2,3-位)的四氢呋喃溶液中含水量达到90%时,其荧光发射强度增加至原来的54倍.此外,固体BTBQ在三氟乙酸蒸气作用下可由淡黄色变成红色,且其蓝绿色荧光被显著猝灭,可见,它可作为传感材料用于酸蒸气的可视化检测.由于连接在喹喔啉5,8-位上的四苯乙烯单元的空阻作用导致BTPQ和DBTPQ不易被质子化,因此,二者对酸不敏感,但是,它们的固态发光颜色在研磨前后发生了明显变化,如,BTPQ在结晶态时发射蓝色荧光,经研磨变成无定形态后,发射蓝绿色荧光,BTPQ和DBTPQ的压致荧光变色行为在研磨、加热/溶剂熏蒸处理下具有可逆性.
A new trioxetine-modified quinoxaline derivatives, BTPQ, DBTPQ and BTBQ, were synthesized.The three compounds showed different degrees of aggregation-induced luminescence (AIE) behavior.When BTBQ 2, 3-diphenylaminofluorophenoxy) furan, the fluorescence emission intensity increased to 54 times of that in the case of 90% water content in tetrahydrofuran.Furthermore, the solid BTBQ can turn from light yellow to red under the action of trifluoroacetic acid vapor, and Its blue-green fluorescence was quenched significantly, it can be used as a sensing material for the visual detection of acid vapor.Because of the empty resistance of the tetracene units attached to the 5,8-position of quinoxaline led to the formation of BTPQ and DBTPQ They are not easily protonated, therefore, they are insensitive to acid. However, their solid-state luminescent color changes obviously before and after grinding. For example, when BTPQ emits blue fluorescence in the crystalline state and becomes amorphous after grinding, Fluorescence emission blue fluorescence, BTPQ and DBTPQ pressure-induced fluorescence discoloration behavior in grinding, heating / solvent fumigation under a reversible.