Diindeno‐Fused Dibenzo[
<i>a</i>
,
<i>h</i>
]anthracene and Dibenzo[
<i>c</i>
,
<i>l</i>
]chrysene: Syntheses, Structural Analyses, and Properties
作者:Siva Senthil Kumar Boominathan、Kai‐Hsin Chang、Yu‐Chiao Liu、Chi‐Shin Wang、Cheng‐Feng Wu、Ming‐Hsi Chiang、Pi‐Tai Chou、Yao‐Ting Wu
DOI:10.1002/chem.201901021
日期:2019.5.28
Diindeno‐fused dibenzo[a,h]anthracene 6 and diindeno‐fused dibenzo[c,l]chrysene 9 contain the key moieties 1,4‐quinodipropene (1,4‐QDP) and 2,6‐naphthoquinodipropene (2,6‐NQDP), respectively, and they both have an open‐shell singlet ground state. The latter compound exhibits a strong biradical character and interesting properties, including a low ΔET−S (2.44 kcal mol−1), a small HOMO–LUMO gap (1.06 eV)
二茚并稠合的二苯并[ a,h ]蒽6和二茚并稠合的二苯并[ c,l ] 9 9包含关键部分1,4-喹二丙烯(1,4-QDP)和2,6-萘喹二丙烯(2,6- NQDP),它们都具有一个开放的单线态基态。后一种化合物具有很强的双自由基特性和令人感兴趣的特性,包括较低的ΔE T-S(2.44 kcal mol -1),较小的HOMO-LUMO间隙(1.06 eV),较宽的光吸收范围(250-1172 nm),并具有较大的双光子吸收截面(σ = 1342±56 GM)。这项工作验证了6具有比其螺旋异构体二茚二烯[2,1- f:1',2' - j ] ene(DIP)稍大的HOMO-LUMO间隙和ΔE T-S,但它是更强的两光子吸收剂,证明几何形状对光物理性质的重要影响。