Electron Acceptors of the Fluorene Series. 9.<sup>1</sup> Derivatives of 9-(1,2-Dithiol-3-ylidene)-, 9-(1,3-Dithiol-2-ylidene)-, and 9-(1,3-Selenathiol-2-ylidene)fluorenes: Synthesis, Intramolecular Charge Transfer, and Redox Properties
作者:Dmitrii D. Mysyk、Igor F. Perepichka、Dmitrii F. Perepichka、Martin R. Bryce、Anatolii F. Popov、Leonid M. Goldenberg、Adrian J. Moore
DOI:10.1021/jo990100r
日期:1999.9.1
The synthesis and physical properties of four series of novel fluorene push-pull compounds (4-7) of the D-pi-A type with intramolecular charge transfer (from 1,3- and 1,2-dithiole and 1,3-selenathiole donor (D) moieties) are described. The nature of the heteroatom (S or Se) in the donor fragment has no effect on the maxima of intramolecular absorption bands (lambda(ICT)), whereas a change of position of the heteroatoms in the dithiole moiety from 1,3 to 1,2 leads to a substantial bathochromic shift in lambda(ICT). Solvatochromism, thermochromism, and negative halochromism in these compounds are demonstrated. Cyclic voltammograms of 4-7 exhibit two, separate, single-electron reversible redox waves, the potentials of which (as well as the ICT energies in the molecules) are quantitatively described by sigma(p)(-) constants of the substituents in the fluorene ring. Compounds 4-7 exhibit reversible salt formation in sulfuric acid, and for compound 5g in diluted sulfuric acid an additional absorption in the near-IR region has been observed that we attribute to radical species formation from the equilibrium [5g-H](+) + 5g reversible arrow 5g(.+) + [5g-H](.).
Mysyk, Dmitrii D.; Perepichka, Igor F., Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 96, # 1-4, p. 527 - 530
作者:Mysyk, Dmitrii D.、Perepichka, Igor F.
DOI:——
日期:——
STRASHNOVA, S. B.;ZAJTSEV, B. E.;ANDRIEVSKIJ, A. M., 2 KONF. NAUCH.-UCHEB. TSENTRA FIZ.-XIM. METODOV ISSLED., 21-24 FEVR., 198+
作者:STRASHNOVA, S. B.、ZAJTSEV, B. E.、ANDRIEVSKIJ, A. M.
DOI:——
日期:——
MIGACHEV G. I., ZH. BCEC. XIM. O-BA IM. D. I. MENDELEEVA, 1979, 24, HO 4, 395-397
作者:MIGACHEV G. I.
DOI:——
日期:——
Nitrofluorene-based A–D–A electron acceptors for organic photovoltaics
作者:Yuxuan Che、Muhammad Rizwan Niazi、Ting Yu、Thierry Maris、Cheng-Hao Liu、Dongling Ma、Ricardo Izquierdo、Igor F. Perepichka、Dmytro F. Perepichka
DOI:10.1039/d2tc05127c
日期:——
(A–D–A) type non-fullerene acceptors. Their optoelectronic properties and performance in bulk heterojunction solar cells with PBDB-T donor polymer are reported. Introducing up to four nitro groups to the fluorene unit results in deeper frontier orbital levels, reduced HOMO–LUMO gap and red-shifted absorption bands. Optimal device performance was achieved for trinitrofluorene acceptors with a solubilizing
我们探索了硝基芴衍生物作为受体-供体-受体 (A-D-A) 型非富勒烯受体的可调吸电子基团。报道了它们在具有 PBDB-T 供体聚合物的本体异质结太阳能电池中的光电特性和性能。将多达四个硝基基团引入芴单元会导致更深的前沿轨道水平,减少 HOMO-LUMO 间隙和红移吸收带。在降低电压和增加光电流之间的权衡中,具有增溶酯基团的三硝基芴受体实现了最佳器件性能。通过单晶 X 射线分析发现的四硝基芴衍生物的 2D 砖砌堆积不同于为高效 A-D-A 受体发现的互穿 3D 网络,这可能是电荷传输性能差的原因。