Covalent Dimers of 1,3-Diphenylisobenzofuran for Singlet Fission: Synthesis and Electrochemistry
作者:Akin Akdag、Abdul Wahab、Pavel Beran、Lubomír Rulíšek、Paul I. Dron、Jiří Ludvík、Josef Michl
DOI:10.1021/jo502004r
日期:2015.1.2
The synthesis of covalent dimers in which two 1,3-diphenylisobenzofuran units are connected through one phenyl substituent on each is reported. In three of the dimers, the subunits are linked directly, and in three others, they are linked via an alkane chain. A seventh new compound in which two 1,3-diphenylisobenzofuran units share a phenyl substituent is also described. These materials are needed
Acid-Induced Rearrangement of Cycloadducts from Cyclopropenecarboxylates and 1,3-Diarylisobenzofurans
作者:Mariia M. Efremova、Alexander P. Molchanov、Anna G. Larina、Galina L. Starova、Rafael R. Kostikov、Alexander V. Stepakov
DOI:10.1002/hlca.201500114
日期:2016.7
Treatment of several Diels–Alder adducts of cyclopropenecarboxylates and 1,3‐diarylisobenzofurans with a strong acid triggers a skeletal rearrangement resulting in 4,8b‐dihydro‐3aH‐indeno[1,2‐b]furans.
用强酸处理几种Diels –环丙烯羧酸酯和1,3-二芳基异苯并呋喃的Alder加合物会引起骨架重排,从而导致4,8b-dihydro-3a H-茚三酮[1,2- b ]呋喃。
Singlet exciton fission in a linear tetracene tetramer
作者:Heyuan Liu、Zhiwei Wang、Xuemin Wang、Li Shen、Chunfeng Zhang、Min Xiao、Xiyou Li
DOI:10.1039/c7tc05783k
日期:——
A novel covalently linked tetracene tetramer was synthesized for the first time. Intramolecular singletfission (iSF) can be conducted efficiently within this tetramer with the triplet state quantum yield as high as 128% and a lifetime >100 μs in solution. This is the highest iSF yield achieved so far in a tetracene compound in solution, and it is also the only case with a triplet quantum yield exceeding
Synthesis and photophysical properties of a bistetracene compound with slipped stacked structure
作者:Heyuan Liu、Xuemin Wang、Lingyun Pan、Li Shen、Xiangyang Wang、Qidai Chen、Xiyou Li
DOI:10.1016/j.jphotochem.2017.03.006
日期:2017.5
A bistetracene compound, composed of a tetracene (Tc) subunit and a diphenyltetracene (DPT) subunit linked by a xanthene bridge, has been prepared. Its molecular structure is characterized by 1H NMR, MALDI-TOF mass spectroscopy and elemental analysis. The bistetracene takes a “face-to-face” stacked conformation with a large displacement along the short axis of the tetracene skeleton. The absorption
制备了由并四苯(Tc)亚基和通过x吨桥连接的二苯基并四苯(DPT)亚基组成的双硬脂环化合物。其分子结构特征为11 H NMR,MALDI-TOF质谱和元素分析。Bistetracene呈“面对面”的堆叠构型,沿着并四苯骨架的短轴位移很大。双十八烷的吸收光谱与它们的单体对应物的吸收光谱相同,这表明两个亚基之间的基态相互作用较弱。由于从Tc到DPT的超快分子内单重态-单重态能量转移,双十八烷的荧光主要由DPT亚基的发射决定。在该双硬脂烷上研究的瞬态吸收光谱表明,能量转移的时间常数为0.32 ps,对应的速率为3.13×10 12 s -1类似于自然光合作用的LH II中从B800到B850的超快速能量转移。这种超快速和有效的能量转移成功地阻止了Tc的单重激发态的无用非放射性衰变,并以100%的效率将Tc的激发能存储为DPT的单重激发态。