联蒽是一类重要的小型二维多环芳烃,具有曲折边缘的石墨烯纳米带特征。因此,对联蒽的结构-性质关系的功能化和深入理解将为小型有机分子装置提供有效的设计。在这项研究中,八氟和四氟联蒽衍生物被合成用于研究负电氟取代对联蒽的结构和物理性质的影响。首先,由于在海湾区域的氟原子的空间排斥,八氟化联蒽衍生物具有扭曲的结构。其次,随着氟取代度的增加,吸收峰和荧光峰最大值发生蓝移。尤其,F8)在657nm处显示强荧光,具有高荧光量子产率(84%)。另外,循环伏安图表明氟取代对分子的最高最高占据分子轨道能级的积极影响;因此,F8分子表现出显着增加的光稳定性。最后,通过扫描电子显微镜和X射线衍射分析研究了含氟化合物的自组装行为。具体地,F8自组装以形成表现出空穴传输性质(3.4×10 -3 cm 2 V -1 s -1)的长的半结晶纳米纤维束。
A couple of fluorescentenantiomers, which are suitable for the emitters of high-efficiency TADF-sensitized CP-OLEDs, have been developed. The enantiomers show configurational stability, high PLQY of 98 %, large kr of 7.8×107 s−1, and intense CPL activities with |glum| values of about 2.5×10−3. Notably, by using matchable TADFsensitizer, the enantiomers were then exploited as emitter to fabricate
The present invention discloses high performance UV cross-linked polymer functionalized molecular sieve/polymer mixed matrix membranes (MMMs), the method of making these membranes, and the use of such membranes for separations. These UV cross-linked MMMs were prepared by incorporating polyethersulfone functionalized molecular sieves such as AlPO-14 and UZM-25 into a continuous UV cross-linkable polymer matrix followed by UV cross-linking. The UV cross-linked MMMs in the form of symmetric dense film, asymmetric flat sheet membrane, or asymmetric hollow fiber membranes described in the current invention have good flexibility and high mechanical strength, and exhibit significantly enhanced selectivity and permeability over the polymer membranes made from the corresponding continuous polyimide polymer matrices for carbon dioxide/methane (CO
2
/CH
4
) and hydrogen/methane (H
2
/CH
4
) separations. The MMMs of the present invention are suitable for a variety of liquid, gas, and vapor separations such as deep desulfurization of gasoline and diesel fuels.