Binaphthyl‐Bridged Pyrenophanes: Intense Circularly Polarized Luminescence Based on a
<i>D</i>
<sub>2</sub>
Symmetry Strategy
作者:Kazuto Takaishi、Sho Murakami、Fumiya Yoshinami、Tadashi Ema
DOI:10.1002/anie.202204609
日期:2022.7.4
D2-symmetric binaphthyl-bridged pyrenophanes have been synthesized with face-to-face pyrene rings. Matching the type and position of the linkers led to the pyrenophane exhibiting intensecircularlypolarizedluminescence with a |glum| value reaching 0.053. This effect arose because of the D2 symmetry of the dye, which resulted in the binaphthyl moieties producing a unidirectionally twisting pyrene
D 2 -对称联萘桥联的芘已合成了具有面对面芘环。匹配接头的类型和位置导致芘显示出强烈的圆偏振发光,具有 | 克拉姆| _ 值达到 0.053。这种效应是由于染料的D 2对称性引起的,这导致联萘部分产生具有完全平行的电和磁跃迁偶极矩的单向扭曲芘准分子。
US6344531B1
申请人:——
公开号:US6344531B1
公开(公告)日:2002-02-05
US6380431B1
申请人:——
公开号:US6380431B1
公开(公告)日:2002-04-30
Temperature‐Induced Sign Inversion of Circularly Polarized Luminescence of Binaphthyl‐Bridged Tetrathiapyrenophanes
作者:Kazuto Takaishi、Fumiya Yoshinami、Yoshihiro Sato、Tadashi Ema
DOI:10.1002/chem.202400866
日期:2024.6.6
D2‐symmetric (R)‐binaphthyl‐bridged pyrenophanes containing thioether bonds were synthesized. The pyrenophanes exhibited the temperature‐induced sign inversion of circularly polarized luminescence (CPL) while maintaining the emission wavelength and reversibility. The Δglum value reached 0.02, and the FL quenching by heat was negligible. The sign inversion of CPL originates from the inversion of intramolecular excimer chirality associated with excitation dynamics. The two pyrenes form a kinetically trapped left‐handed twist excimer at low temperatures, while they form a thermodynamically favored right‐handed twist excimer at high temperatures. The thioether linkers can impart flexibility suitable for the inversion of chirality of the excimers.