一系列A-π-d-π-A的类型具有各种端基(对称推挽生色团例如通过对称π连接,三氟,茚满酮,二氰基,异恶唑和吡唑啉酮)-缀合的主链(EDOT亚苯基亚乙烯基- EDOT )合成。通过紫外可见吸收,荧光光谱和DFT计算深入研究了端基调谐对光学性能的影响。末端受体的电子接受强度发生了细微的变化,从而获得了显示出强吸收性的多种发色团。光学研究表明,它们的低光学带隙(1.8–2.2 eV)加上出色的摩尔吸收率(45,000–101,500 M -1 cm -1),将提供强大的光捕获能力。
一系列A-π-d-π-A的类型具有各种端基(对称推挽生色团例如通过对称π连接,三氟,茚满酮,二氰基,异恶唑和吡唑啉酮)-缀合的主链(EDOT亚苯基亚乙烯基- EDOT )合成。通过紫外可见吸收,荧光光谱和DFT计算深入研究了端基调谐对光学性能的影响。末端受体的电子接受强度发生了细微的变化,从而获得了显示出强吸收性的多种发色团。光学研究表明,它们的低光学带隙(1.8–2.2 eV)加上出色的摩尔吸收率(45,000–101,500 M -1 cm -1),将提供强大的光捕获能力。
Synthesis and photophysical properties of benzo[<i>c</i>]thiophene, <i>p</i>-phenylene-, triphenylamine-, and pyrene-based vinylenes
作者:Meganathan Nandakumar、Elumalai Sankar、Arasambattu K. Mohanakrishnan
DOI:10.1080/00397911.2016.1228111
日期:2016.11.16
ABSTRACT An efficient synthesis of benzo[c]thiophenyl/p-phenylenyl/pyrenyl phosphonate esters has been achieved using ZnBr2-catalyzed Michaelis–Arbuzov reaction of corresponding benzyl alcohol/bromides at room temperature. Horner–Wadsworth–Emmons reaction of the phosphonate esters with aryl/heteroaryl aldehydes in the presence of t-BuOK furnished the vinylenes in good yields. The absorption and emission
Two oligo(phenylenevinylene)s with cyanobiphenyl terminates were synthesized as non-covalent modifiers of single walled carbon nanotubes (SWNTs). The wrapping of SWNTs with synthesized oligomers enhanced the dispersibility in CHCl3 by the dissociation of SWNT bundle structures. It was found that the addition of oligomers caused self-organized precipitation from a homogeneous dispersed solution of SWNT complexes. The self-organized precipitates exhibited thermotropic liquid-crystalline properties.
Conjugated Polymers Featuring Heavier Main Group Element Multiple Bonds: A Diphosphene-PPV
作者:Rhett C. Smith、John D. Protasiewicz
DOI:10.1021/ja0394683
日期:2004.3.3
inorganic-organic conjugated materials. The new phosphaalkene polymers have been prepared from a diphospha-Wittig reagent and are exclusively E-configured about the P=C bonds. An unprecedented polymer having diphosphene (-P=P-) units in the polymer main chain is also reported. The soluble polymers were characterized by UV-visible and fluorescence spectroscopy, as well as by 1H and 31P NMR spectroscopy.
Exceptionally large two- and three-photon absorption cross-sections by OPV organometalation
作者:Beibei Gao、Leszek M. Mazur、Mahbod Morshedi、Adam Barlow、Huan Wang、Cristóbal Quintana、Chi Zhang、Marek Samoc、Marie P. Cifuentes、Mark G. Humphrey
DOI:10.1039/c6cc02560a
日期:——
End-functionalization of OPVs by chlorobisbis(diphenylphosphino)ethane}ruthenium alkynyl units affords molecules with exceptionally large two- and three-photon absorption cross-sections.
ordered assemblies exhibiting significant electrical transport is a challenging task in the field of organic optoelectronics. In this context, a series of novel phenothiazine‐based oligo(p‐phenylenevinylene) (OPV1‐6) derivatives were designed and their structure–property relationship was investigated. Upon examining their photophysical properties, all the OPVs were found to exhibit significant intramolecular