Despite strong π‐interactions, aggregation‐induced quenching and triplet–triplet annihilation are avoided in HTANGO and TCTANGO which display efficient phosphorescence in the solid state. To our knowledge, HTANGO with the solid‐state phosphorescence quantum yield of 42 % at room temperature is the most efficient phosphor composed of the 1st/2nd raw elements only.
我们报告了一系列高发射性氮杂triangulenetrione(TANGO)固体,其中通过调节取代基的空间大小,通过工程化分子堆积来控制发光特性。π堆栈内的“致
磷”羰基的共排列导致HTANGO,TCTANGO,T
BTANGO和TITANGO中几乎是纯三重态发射,而它们在空间受阻的t BuTANGO中旋转≈60°则导致了几乎纯单峰态排放。尽管存在很强的π相互作用,但是在HTANGO和TCTANGO中避免了聚集诱导的猝灭和三重态-三重态an灭,因为它们在固态下显示出有效的
磷光。据我们所知,室温下固态
磷光量子产率为42%的HTANGO是由以下1种元素组成的最有效的
磷光体仅限st / 2 nd原始元素。