Heads vs. tails: a double-sided study of the influence of substituents on the glass-forming ability and stability of aminotriazine molecular glasses
作者:Audrey Laventure、Armand Soldera、Christian Pellerin、Olivier Lebel
DOI:10.1039/c3nj00709j
日期:——
Mexylaminotriazine derivatives are known to spontaneously form long-lived glassy phases. The role played by various structural elements in their glass formation has been studied, but the effect of substituting both arylamino substituents remains largely unknown. A library of 4,6-bis(arylamino)- or 4,6-bis(alkylamino)-1,3,5-triazine derivatives with a methylamino or ethyl substituent in the 2-position were synthesized, and their glass-forming properties were studied. While the 3,5-disubstituted aryl motif proved to be the best among those studied for promoting glass formation, glass-forming ability and stability were found to be in large part influenced by the “headgroup” at the 2-position of the triazine ring, with dramatic differences in glass-forming behavior observed from one headgroup to the other.
众所周知,甲氧基氨基三嗪衍生物可自发形成长寿命玻璃相。人们已经研究了各种结构元素在其玻璃相形成过程中所起的作用,但取代两个芳基氨基取代基的效果在很大程度上仍然未知。我们合成了一个 4,6-双(芳基氨基)- 或 4,6-双(烷基氨基)-1,3,5-三嗪衍生物库,这些衍生物在 2 位上具有甲基氨基或乙基取代基,并对它们的玻璃形成特性进行了研究。虽然在所研究的衍生物中,3,5-二取代芳基基团被证明是促进玻璃形成的最佳基团,但研究发现玻璃形成能力和稳定性在很大程度上受到三嗪环 2 位上 "头基 "的影响,不同头基的玻璃形成行为存在巨大差异。