材料科学
荧光
硼
量子产额
发光
圆二色性
兴奋剂
杂原子
螺旋度
光化学
结晶学
纳米技术
光电子学
化学
光学
物理
有机化学
戒指(化学)
粒子物理学
作者
Geethu Venugopal,V. Ravi Kumar,Ashok Badrinarayan Jadhav,Sangram D. Dongre,Abujunaid Khan,Rajesh G. Gonnade,Jatish Kumar,Sukumaran Santhosh Babu
标识
DOI:10.1002/chem.202304169
摘要
Abstract Helical nanographenes have garnered substantial attention owing to their finely adjustable optical and semiconducting properties. The strategic integration of both helicity and heteroatoms into the nanographene structure, facilitated by a boron‐oxygen‐based multiple resonance (MR) thermally activated delayed fluorescence (TADF), elevates its photophysical and chiroptical features. This signifies the introduction of an elegant category of helical nanographene that combines optical (TADF) and chiroptical (CPL) features. In this direction, we report the synthesis, optical, and chiroptical properties of boron, oxygen‐doped Π‐extended helical nanographene. The π‐extension induces distortion in the DOBNA‐incorporated nanographene, endowing a pair of helicenes, ( P)‐ B2NG , and ( M)‐ B2NG exhibiting circularly polarized luminescence with g lum of −2.3×10 −3 and +2.5×10 −3 , respectively. B2NG exhibited MR‐TADF with a lifetime below 5 μs, and a reasonably high fluorescence quantum yield (50 %). Our molecular design enriches the optical and chiroptical properties of nanographenes and opens up new opportunities in multidisciplinary fields.
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