hard crushing and heating. The reversible conversion of the crystalline phase to amorphous phase was responsible for the fluorescence switching of BA and ID. Computational studies have been performed to get an insight into the energy level modulation upon the change of the molecular conformation. Thus, we have presented the facile preparation of strong red fluorescent dyes exhibiting high contrast stimuli-responsive
合成了
三苯胺(
TPA)和基于N-甲基
巴比妥酸/
茚满二酮的供体-受体衍
生物,并证明了分子构象和固体状态下从黄色到红色的依赖包装的可调荧光。
TPA与Ñ -methylBArbituric酸(BA- 1)显示出明亮的黄色荧光(λ最大= 550纳米,Φ ˚F = 22.8%),而OCH 3在
TPA的苯环取代,(BA- 2和BA- 3)产生的强红色(λ最大= 602纳米,Φ ˚F = 41.1%)和橙色荧光的固体(λ最大= 582纳米,Φ ˚F = 19.1%)。
茚满二酮受体
染料显示红色至深红色荧光。ID- 1显示出红色荧光在604纳米(Φ ˚F = 17.7%),而ID- 2和ID- 3在611(显示荧光Φ ˚F = 19.4%)和636纳米(Φ ˚F在固态= 14.1%)。固态结构分析表明,OCH 3取代会改变分子构象和堆积,从而导致可调荧光。BA和ID化合物在硬粉碎后显示出关闭的荧光/荧光强度大大降低了(Φ