497955-49-4

Upstream product

• 122-39-4 diphenylamine 
• 873657-58-0 2’,7’-dibromo-9,9'-spirobi[fluorene]-2,7-dicarbonitrile 
• 497955-48-3 2,7-dicyano-9,9'-spirobifluorene 
• 171408-84-7 2,7-dibromo-9,9'-spirobi[fluorene] 

Relevant academic research and scientific papers

Syntheses and spectroscopic studies of spirobifluorene-bridged bipolar systems; photoinduced electron transfer reactions

Some 9,9′-spirobifluorene-bridged bipolar systems 1-3 containing 1,3,4-oxadiazole-conjugated oligoaryl and triarylamine moieties have been synthesized, in which 1 exhibits remarkable solvent-polarity dependent fluorescence properties due to a highly effic

Spiro compound and light-emitting device thereof

The invention relates to the technical field of organic light-emitting materials and particularly relates to a spiro compound and a light-emitting device using the same. A structural formula of the spiro compound is as shown in a general formula I. A fluo

Synthesis, structures, and photoinduced electron transfer reaction in the 9,9′-spirobifluorene-bridged bipolar systems

A series of 9,9′-spirobifluorene-bridged bipolar compounds DnAm bearing various n:m ratios for triarylamine (D) versus 1,3,4-oxadiazole- conjugated oligoaryl moiety (A) have been synthesized to investigate the corresponding photoinduced electron transfer (PET) property. The excitation behaviors were probed by steady-state absorption, emission, fluorescence solvatochromism, and femtosecond fluorescence up-conversion spectroscopy. The overall reaction dynamics can be rationalized by the rate of PET, in combination with solvent relaxation dynamics. It was found that the rate of PET is dependent on the anchored D/A ratio. The rate of D1A1 and D2A1 was resolved to be ～2.44 × 1012 and 2.32 × 1012 s -1, respectively, while it is irresolvable in D1A2 and D2A2 (>6.6 × 1012 s-1). In another approach, based on the comprehensive X-ray data, cyclic voltammetry, and absorption/emission spectra, the rate of photoinduced electron transfer was also qualitatively estimated. Fair comparisons were made between experimental and theoretical approaches to gain detailed insight into the PET for the titled systems.