A series of organic fluorophores based on novel [1,2,4]triazolo [4′,3':1,2]pyrido [3,4-b]pyrazine architecture were synthesized by a simple two-step protocol. Synthesized organic fluorophores exhibit blue-to-green fluorescence and their UV absorption and fluorescent emission properties were studied. The photophysical properties of synthesized derivatives were tuned by introducing functionalities of varying electronic nature on the core nucleus. The luminescence maxima of the synthesized compounds are found in the range from 427 nm to 503 nm, and the quantum yields ranging from 0.01 to 0.64 were calculated. Among various synthesized molecules, 3-(4-bromophenyl)-8,9-bis(4-methoxyphenyl)-[1,2,4]triazolo [4′,3':1,2]pyrido [3,4-b]pyrazine showed highest quantum yield (ΦF = 0.64), and was further explored for its solvatochromic, acidochromic, aggregation induced fluorescence studies along with theoretical HOMO-LUMO calculations.

中文翻译：

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作为新型荧光团的发光三唑稠合吡啶并[3,4-b]吡嗪


通过简单的两步方案合成了一系列基于新型[1,2,4]三唑并[4',3':1,2]吡啶并[3,4-b]吡嗪结构的有机荧光团。合成的有机荧光团表现出蓝绿色荧光，并研究了它们的紫外吸收和荧光发射特性。通过在核上引入不同电子性质的功能来调节合成衍生物的光物理性质。合成化合物的发光最大值在427 nm至503 nm范围内，计算出量子产率范围为0.01至0.64。在各种合成分子中，3-(4-溴苯基)-8,9-双(4-甲氧基苯基)-[1,2,4]三唑并[4',3':1,2]吡啶并[3,4-b ]吡嗪表现出最高的量子产率（ΦF = 0.64），并进一步探索其溶剂化变色、酸变色、聚集诱导荧光研究以及理论 HOMO-LUMO 计算。